Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Trading Arrangement: Trading Arrangement [Axis] Maximum Maximum [Member] Commercial real estate loan, held-for-sale Financing Receivable, Held-for-Sale Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Net Counterparty Exposure Repurchase Agreement Counterparty, Amount at Risk Title of 12(b) Security Title of 12(b) Security Subsequent event Subsequent Event [Member] Carrying Value Reported Value Measurement [Member] Net Income (Loss) Attributable to Common Stockholders Net Income (Loss) Available to Common Stockholders, Diluted Weighted average yield, financing provided Debt, Weighted Average Interest Rate Investment Holdings [Table] Commercial Real Estate Loans [Table] Commercial Real Estate Loans Adjustment to Compensation, Amount Adjustment to Compensation Amount Financial Instrument [Axis] Financial Instrument [Axis] Real Estate [Line Items] Real Estate [Line Items] Schedule of Future Amortization of Lease Intangibles Intangible Asset, Finite-Lived, and Capitalized Cost, Software to be Sold, Leased, or Marketed, Estimated Amortization Expense [Table Text Block] Derivative Instrument [Axis] Derivative Instrument [Axis] Interest rate of principal (as a percent) Long-Term Debt, Gross, Percentage Long-Term Debt, Gross, Percentage Measurement Frequency [Axis] Measurement Frequency [Axis] KREF KREF [Member] KREF Consolidated Entities [Axis] Consolidated Entities [Axis] Treasury stock acquired, average cost per share (usd per share) Shares Acquired, Average Cost Per Share KKR Affiliate KKR Affiliate [Member] KKR Affiliate Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Proceeds from principal repayments of commercial real estate loans Proceeds from principal repayments of commercial real estate loans Proceeds from Principal Repayment, Loan and Lease, Held-for-Investment Amortization rate (as a percent) Debt Instrument, Amortization Rate Debt Instrument, Amortization Rate KREF Lending XVII KREF Lending XVII [Member] KREF Lending XVII Commercial real estate loans, held-for-investment, measurement input Loan, Held-For-Investment, Measurement Input Loan, Held-For-Investment, Measurement Input Affiliated Company, Equity Method Investment Affiliated Company, Equity Method Investment [Member] Affiliated Company, Equity Method Investment High Risk/Potential for Loss Doubtful [Member] Related Party Transactions Related Party Transactions Disclosure [Text Block] Consolidated Entities [Domain] Consolidated Entities [Domain] Variable interest entity assets, CMBS trust, measurement input Variable Interest Entity Assets, CMBS Trust, Measurement Input Variable Interest Entity Assets, CMBS Trust, Measurement Input 6.5% Series A Cumulative Redeemable Preferred Stock 6.5% Series A Cumulative Redeemable Preferred Stock [Member] 6.5% Series A Cumulative Redeemable Preferred Stock Year five Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year Common stock par value (usd per share) Common Stock, Par or Stated Value Per Share Unvested, beginning balance (in shares) Unvested, ending balance (in shares) Total (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Share of the outstanding financing principal, percent Debt Instrument, Entity Share Of Outstanding Principal, Percent Debt Instrument, Entity Share Of Outstanding Principal, Percent Student Housing Student Housing [Member] Student Housing Liabilities related to real estate owned, held-for-investment Real Estate Owned, Held For Investment, Liability Real Estate Owned, Held For Investment, Liability Estimated fair value Real Estate Investment Property, at Cost Number of consecutive vesting periods (Years) Share-Based Compensation Arrangement By Share-Based Payment Award, Number Of Consecutive Vesting Periods Share-Based Compensation Arrangement By Share-Based Payment Award, Number Of Consecutive Vesting Periods Loan principal repayments held by a servicer Loan Principal Repayments Held By A Servicer Loan Principal Repayments Held By A Servicer Concentration Risk [Table] Concentration Risk [Table] Entity Address, City or Town Entity Address, City or Town Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Class of Financing Receivable [Domain] Class of Financing Receivable [Domain] KKR KKR & Co. L.P. [Member] KKR & Co. L.P. [Member] Receivables [Abstract] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Title of Individual [Domain] Title and Position [Domain] KREF Lending XI KREF Lending XI [Member] KREF Lending XI Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Common stock authorized Common Stock, Value, Authorized Common Stock, Value, Authorized CMBS B-Pieces CMBS B-Pieces [Member] CMBS B-Pieces Future funding SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Future Funding SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Future Funding Level 2 Fair Value, Inputs, Level 2 [Member] Other Income Nonoperating Income (Expense) [Abstract] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Minimum voting percentage for renewal of agreement term Related Party Transaction, Minimum Voting Percentage For Renewal Of Agreement Term Related Party Transaction, Minimum Voting Percentage For Renewal Of Agreement Term Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] 2029 Lessor, Operating Lease, Payment to be Received, Year Three Subsequent Event Type [Axis] Subsequent Event Type [Axis] Other Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Other Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Other Concentration Risk Type [Axis] Concentration Risk Type [Axis] Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Principal repayments on borrowings under collateralized loan obligations Repayments Of Borrowings Under Collateralized Loan Obligations Repayments Of Borrowings Under Collateralized Loan Obligations Unfavorable Lease Intangible Liabilities Real Estate Owned, Below Market Lease Intangible Assets [Abstract] Real Estate Owned, Below Market Lease Intangible Assets Minimum cash liquidity covenant amount Debt Instrument, Covenant, Cash Liquidity Amount Debt Instrument, Covenant, Cash Liquidity Amount Use of Estimates Use of Estimates, Policy [Policy Text Block] Related Party [Axis] Related and Nonrelated Parties [Axis] Change in net assets of consolidated variable interest entities, CMBS trusts Variable Interest Entities, Change in Noncash Assets Variable Interest Entities, Change in Noncash Assets Supplemental Schedule of Non-Cash Investing and Financing Activities Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Less: Allowance for credit losses Beginning balance Ending balance Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest Document Period End Date Document Period End Date Seattle, WA Seattle, WA [Member] Seattle, WA Commercial Real Estate Loans, Held-For-Investment Commercial Real Estate, Financing Receivable, Held For Investment [Policy Text Block] Commercial Real Estate, Financing Receivable, Held For Investment Preferred stock outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Preferred Stock, Shares Outstanding Outstanding principal, financing provided Principal Debt Instrument, Face Amount Gain on sale of property Gain (Loss) on Sale of Properties Net Income (Loss) Per Share of Common Stock Net income (loss) attributable to common stockholders, per: Earnings Per Share, Basic [Abstract] Weighted average life (years) Debt Instrument, Term Yield Measurement Input, Yield [Member] Measurement Input, Yield [Member] Repurchased stock (2,351,812 and 1,120,943 shares repurchased as of June 30, 2026 and December 31, 2025, respectively) Treasury Stock, Common, Value Proceeds from noncontrolling interest contributions Proceeds from Noncontrolling Interests Forward points on derivative instruments Derivative, Amortization Of Forward Contract Derivative, Amortization Of Forward Contract Accretion of loan discount and other amortization, net Mortgage Loans On Real Estate, Amortization Of Premium (Discount), Net Mortgage Loans On Real Estate, Amortization Of Premium (Discount), Net Deferred financing costs, not yet paid Deferred Financing Costs, Incurred But Not Yet Paid Deferred Financing Costs, Incurred But Not Yet Paid Entity Shell Company Entity Shell Company Unrealized gain (loss) included in change in net assets of consolidated variable interest entities, CMBS trusts Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Number of joint ventures Number Of Equity Method Investments Number Of Equity Method Investments Earnings (Loss) per Share Earnings Per Share [Text Block] Earnings Per Share [Abstract] Offsetting Liabilities [Line Items] Offsetting Liabilities [Line Items] Document Fiscal Period Focus Document Fiscal Period Focus Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Total Liabilities Liabilities Trading Symbol Trading Symbol Discount rate Measurement Input, Discount Rate [Member] Schedule of Repurchase Agreement Counterparty [Table] Repurchase Agreement, Counterparty [Table] San Diego, CA San Diego, CA [Member] San Diego, CA Company Selected Measure Name Company Selected Measure Name Sale of Stock [Domain] Sale of Stock [Domain] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Operating lease, lease income, statement of income or comprehensive income [Extensible Enumeration] Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration] In-place lease intangibles In-Place Lease Intangibles In-Place Lease Intangibles Offsetting Liabilities [Table] Offsetting Liabilities [Table] Concentration Risk [Line Items] Concentration Risk [Line Items] Schedule of Repurchase Agreements Schedule of Repurchase Agreement Counterparties with Whom Repurchase Agreements Exceed 10 Percent of Stockholders' Equity [Table Text Block] Capital commitment Long-Term Purchase Commitment, Amount Current fiscal year Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year Credit Facility [Domain] Credit Facility [Domain] Cash Flows From Operating Activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Capital expenditures on real estate owned Payments For Capital Expenditures, Real Estate Owned Payments For Capital Expenditures, Real Estate Owned Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Useful life Property, Plant, and Equipment, Useful Life Dividend, share-based payment arrangement Dividend, Share-Based Payment Arrangement Dividend declared, not yet paid Dividends payable Dividends Payable Vesting percentage (as a percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Management fees Management Fees [Member] Management Fees [Member] Tenant Receivables Tenant Receivables [Policy Text Block] Tenant Receivables Deferred Debt Issuance Costs Deferred Charges, Policy [Policy Text Block] Cash and Cash Equivalents and Restricted Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Percent of trailing 12 month weighted average adjusted equity (as a percent) Related Party Transaction, Expenses From Transactions With Related Party, Denominator For Incentive Compensation, Percentage Of Adjusted Equity Related Party Transaction, Expenses From Transactions With Related Party, Denominator For Incentive Compensation, Percentage Of Adjusted Equity Award Timing Predetermined Award Timing Predetermined [Flag] Capitalization rate Measurement Input Capitalization Rate [Member] Measurement Input Capitalization Rate Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Stock-based compensation, net APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Level 1 Fair Value, Inputs, Level 1 [Member] Floating Rate Loan % Mortgage Loans On Real Estate, Floating Rate, Percentage Of Loans Mortgage Loans On Real Estate, Floating Rate, Percentage Of Loans Schedule of Concentration of Risk, by Risk Factor Schedules of Concentration of Risk, by Risk Factor [Table Text Block] Gain (loss) on sale of real estate owned (Gain) loss on sale of real estate owned Gain (Loss) on Sale of Investments Fair Value Fair Value of Financial Instruments, Policy [Policy Text Block] Secured term loan Secured Term Loan [Member] Secured Term Loan Unfunded Loan Commitments Off-Balance-Sheet, Credit Loss, Liability [Roll Forward] Repurchase and retirement of common stock Stock Repurchased and Retired During Period, Value Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] Preferred stock par value (usd per share) Preferred Stock, Par or Stated Value Per Share Long-term debt, fair value Long-Term Debt, Fair Value Depreciation expense Depreciation Other Assets and Liabilities Other Liabilities Disclosure [Text Block] Plan Name [Domain] Plan Name [Domain] Number of loan investments used as collateral Debt Instrument, Number Of Loan Investments Used As Collateral Debt Instrument, Number Of Loan Investments Used As Collateral Quarterly Incentive Compensation Quarterly Incentive Compensation [Member] Quarterly Incentive Compensation [Member] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Schedule of Below Market Lease, Future Amortization Income Below Market Lease, Future Amortization Income [Table Text Block] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Secured financing agreements, net Long-Term Line of Credit Common stock issued related to vesting RSUs (in shares) Share Based Compensation Arrangement By Share Based Payment Award, Options, Grants In Period, Net of Stock Issued in Connection with Vested RSUs Share Based Compensation Arrangement By Share Based Payment Award, Options, Grants In Period, Net of Stock Issued in Connection with Vested RSUs Payments of common stock dividends Payments of Ordinary Dividends, Common Stock Expiration Date Trading Arrangement Expiration Date 2030 Long-Term Debt, Maturity, Year Four Real Estate [Table] Real Estate [Table] Restricted cash (Note 9) Restricted cash Restricted Cash and Cash Equivalent Cash and cash equivalents, fair value Cash and Cash Equivalents, Fair Value Disclosure Total Equity Beginning balance Ending balance Equity, Including Portion Attributable to Noncontrolling Interest Building Building [Member] Nonrelated party Nonrelated Party [Member] 2026 (in shares) Share-Based Compensation Arrangement By Share-Based Payment Award, Restricted Stock Awards Expected To Vest One Year From Balance Sheet Date Share-based Compensation Arrangement by Share-based Payment Award, Restricted Stock Awards Expected to Vest Remainder of the Balance Sheet Year Transfer of senior loan to real estate owned Transfer Of Loans To Real Estate Owned Transfer Of Loans To Real Estate Owned Weighted average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Excluding Vested But Undistributed Restricted Stock Units, Basic Weighted Average Number of Shares Outstanding, Excluding Vested But Undistributed Restricted Stock Units, Basic Loss contingency, estimate of possible loss Loss Contingency, Estimate of Possible Loss Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Fair value Loan, Held-In-Portfolio, Fair Value Loan, Held-In-Portfolio, Fair Value Cash Flows From Investing Activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Related Party Transaction [Axis] Related Party Transaction [Axis] Long-term purchase commitment period Long-Term Purchase Commitment, Period 2027 Lessor, Operating Lease, Payment to be Received, Year One Total Income (Loss) From Real Estate Owned Operations Income (Loss) From Real Estate Owned Operations Direct Capitalization Valuation Technique, Direct Capitalization Method [Member] Valuation Technique, Direct Capitalization Method Unfavorable lease intangibles Amortization of Below Market Lease Debt Obligations Secured Term Loan, Net Debt Disclosure [Text Block] Consolidated variable interest entities assets, CMBS trusts, at fair value Commercial real estate loans, held-for-investment, net Financing Receivable, after Allowance for Credit Loss Unamortized debt issuance costs Deferred financing costs Debt issuance costs Deferred financing cost, Revolver Debt Issuance Costs, Net PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Secured Financing Agreements Secured term loan, net Secured Debt [Member] Payment to acquire equity method investment, real estate asset Payments to Acquire Equity Method Investments Total KKR Real Estate Finance Trust Inc. Stockholders’ Equity Equity, Attributable to Parent Tenant receivables Tenant Receivables Tenant Receivables Real Estate [Domain] Real Estate [Domain] Assets Assets [Abstract] Investments in CMBS securities Other Investments Schedule of Amortized Cost of Loan Portfolio Financing Receivable Credit Quality Indicators [Table Text Block] Insider Trading Policies and Procedures [Line Items] Weighted average loan risk rating Weighted Average Loan Risk Rating Weighted Average Loan Risk Rating KREF 2021-FL2 KREF 2021-FL2 [Member] KREF 2021-FL2 Affiliate expenses Arrangement And Structuring Fees Arrangement And Structuring Fees Consolidated variable interest entities liabilities, CMBS trusts, at fair value Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Write-offs charged Allowance For Credit Loss, Writeoff Allowance For Credit Loss, Writeoff Other Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset (Liability), Other Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset (Liability), Other Weighted average unvested RSUs (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Entity Central Index Key Entity Central Index Key Percent of aggregate cash proceeds and any capital contributions Debt Instrument, Covenant, Consolidated Tangible Net Worth, Minimum Percentage of Aggregate Cash Proceeds Made and Capital Contributions Received Debt Instrument, Covenant, Consolidated Tangible Net Worth, Percentage of Aggregate Cash Proceeds Made and Capital Contributions Received Equity [Abstract] Equity [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Amount of aggregate cash proceeds and any capital contributions Debt Instrument, Covenant, Consolidated Tangible Net Worth, Amount Of Aggregate Cash Proceeds Made And Capital Contributions Received Debt Instrument, Covenant, Consolidated Tangible Net Worth, Amount Of Aggregate Cash Proceeds Made And Capital Contributions Received 2026 Long-Term Debt, Maturity, Remainder of Fiscal Year Management fee as a percent of weighted average adjusted equity (greater of) Related Party Transaction, Expenses From Transactions With Related Party, As A Percent Of Weighted Average Adjusted Equity Related Party Transaction, Expenses From Transactions With Related Party, As A Percent Of Weighted Average Adjusted Equity Ownership [Axis] Ownership [Axis] Acquisition of real estate owned Real Estate Owned, Acquisition Real Estate Owned, Acquisition Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Investment, Name [Axis] Investment, Name [Axis] Change in net assets of consolidated variable interest entities, CMBS trusts Change in net assets of consolidated variable interest entities, CMBS trusts Variable Interest Entity, Change in Net Assets Variable Interest Entity, Change in Net Assets Preferred stock, dividend rate (as a percent) Preferred Stock, Dividend Rate, Percentage Senior Mortgage Loan Senior Mortgage Loan [Member] Senior Mortgage Loan Interest rates (as a percent) Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate SEC Schedule, 12-29, Real Estate Companies, Investment in Movement in Mortgage Loans on Real Estate [Roll Forward] SEC Schedule, 12-29, Real Estate Companies, Investment in Movement in Mortgage Loans on Real Estate [Roll Forward] Land And Building Improvements Land And Building Improvements [Member] Land And Building Improvements Assets related to real estate owned, held-for-sale, net of liabilities Increase (Decrease) in Net Assets Related to Real Estate Owned, Held For Sale Increase (Decrease) in Net Assets Related to Real Estate Owned, Held For Sale All Individuals All Individuals [Member] Deferral Plan Deferral Plan [Member] Deferral Plan Consolidated variable interest entities assets, CMBS trusts, at fair value Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Weighted average period (Years) Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Statement [Line Items] Statement [Line Items] Total Assets Assets Interest expense Interest Expense, Operating West Hollywood, CA West Hollywood, CA [Member] West Hollywood, CA Internal Credit Assessment [Domain] Internal Credit Assessment [Domain] Transfer of senior loan to equity method investment Transfer Of Loans To Equity Method Investment Transfer Of Loans To Equity Method Investment Variable Interest Entity, Not Primary Beneficiary Variable Interest Entity, Not Primary Beneficiary [Member] Expenses from real estate owned operations Expenses from REO operations Property Operating Expense Property Operating Expense Stock-based Compensation Share-Based Payment Arrangement [Text Block] Add: Weighted average deferred stock units (in shares) Incremental Common Shares Attributable to Deferred Stock Units Incremental Common Shares Attributable to Deferred Stock Units PEO PEO [Member] 2028 Long-Term Debt, Maturity, Year Two Variable Interest Entities, Name [Domain] Variable Interest Entities, Name [Domain] [Domain] for Variable Interest Entities, Name [Axis] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Cash liquidity covenant, percent of recourse indebtedness (greater of) Debt Instrument, Covenant, Cash Liquidity, Percent Of Recourse Indebtedness Debt Instrument, Covenant, Cash Liquidity, Percent Of Recourse Indebtedness Schedule of Assets and Associated Liabilities Accounted for as Secured Borrowings [Table] Transfer and Servicing, Asset and Liability Accounted for as Secured Borrowing [Table] Quarterly Management Fee Quarterly Management Fee [Member] Quarterly Management Fee [Member] Accumulated Deficit Retained Earnings [Member] Operating expense Operating Expenses Proceeds from loan repayments SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Collections of Principal 2028 (in shares) Share-Based Compensation Arrangement By Share-Based Payment Award, Restricted Stock Awards Expected To Vest Three Years From Balance Sheet Date Share-Based Compensation Arrangement By Share-Based Payment Award, Restricted Stock Awards Expected To Vest Three Years From Balance Sheet Date Revolving Credit Agreement Revolving Credit Facility [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Common stock outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Extension term Debt Instrument, Extension Term Debt Instrument, Extension Term Schedule of Assets and Liabilities Recorded at Fair Value on Recurring Basis Fair Value, by Balance Sheet Grouping [Table Text Block] Diluted (usd per share) Diluted common share (usd per share) Earnings Per Share, Diluted Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] (Provision for) reversal of credit losses Provision for (reversal of) credit losses, net Financing Receivable, Credit Loss, Expense (Reversal) In-place lease intangibles Intangible Asset, Finite-Lived, Amortization Expense Preferred Stock, $0.01 par value, 50,000,000 shares authorized Series A cumulative redeemable preferred stock, (13,110,000 shares issued and outstanding as of June 30, 2026 and December 31, 2025); liquidation preference of $327,750, or $25.00 per share Preferred Stock, Value, Outstanding Ownership [Domain] Ownership [Domain] Year three Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year Commercial Real Estate Loans Held-For-Investment and Allowance for Credit Losses Financing Receivable, Held-for-Investment [Policy Text Block] Proceeds from borrowings under secured financing agreements Proceeds from Long-Term Lines of Credit Real estate owned - building improvements Building Improvements Building Improvements Long-term Purchase Commitment [Line Items] Long-Term Purchase Commitment [Line Items] Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Discount margin Measurement Input, Discount Margin [Member] Measurement Input, Discount Margin Outstanding principal, collateral assets Transfers Accounted For As Secured Borrowings, Assets, Face Amount Transfers Accounted For As Secured Borrowings, Assets, Face Amount Weighted average life (Years) Repurchase Agreement, Weighted-Average Maturity Period Surety Bond Surety Bond [Member] Schedule of Equity Method Investments Equity Method Investments [Table Text Block] Duration (years) Measurement Input, Duration [Member] Measurement Input, Duration Expense reimbursements Expense Reimbursements [Member] Expense Reimbursements Repurchase of common stock Repurchase and retirement of common stock Stock Repurchased During Period, Value Beginning balance Ending balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset (Liability) Value Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset (Liability) Value Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Accrued interest payable Increase (Decrease) in Interest Payable, Net RECOP I RECOP I [Member] RECOP I [Member] Year four, write-off Financing ​Receivable, ​Originated, Gross Write-off, ​Four​ Years​ Before ​Latest​ Fiscal​ Year Financing ​Receivable, ​Originated, Gross Write-off, ​Four​ Years​ Before ​Latest​ Fiscal​ Year Schedule of Maturities of Debt Obligations Schedule of Maturities of Long-Term Debt [Table Text Block] Schedule of Equity Method Investments [Table] Equity Method Investment [Table] Title of Individual [Axis] Title and Position [Axis] Sale of Stock [Axis] Sale of Stock [Axis] Weighted average funding cost Long-Term Debt, Weighted Average Interest Rate, at Point in Time Multifamily Multifamily [Member] Gain (loss) on foreign currency forward contracts (includes unrealized gains (losses) of ($5,333) and $1,488 in 2026 and $0 and $0 in 2025, respectively) Unrealized gain (loss) on derivative instruments Derivative, Gain (Loss) on Derivative, Net Schedule of Dividends Declared Dividends Declared [Table Text Block] Accrued Interest Receivables Financing Receivable, Interest Receivables [Policy Text Block] Financing Receivable, Interest Receivables [Policy Text Block] Real estate owned, held-for-investment, net Other Real Estate Principal borrowings Proceeds from Issuance of Debt Related Party Transaction [Domain] Related Party Transaction [Domain] Period of adjusted earnings (Months) Related Party Transaction, Expenses From Transactions With Related Party, Numerator For Incentive Compensation, Period Of Adjusted Earnings Related Party Transaction, Expenses From Transactions With Related Party, Numerator For Incentive Compensation, Period Of Adjusted Earnings Schedule of Collateral Assets and Respective Borrowings Schedule Of Collateral Assets And Long-Term Debt Instruments [Table Text Block] Schedule Of Collateral Assets And Long-Term Debt Instruments [Table Text Block] Year one, write-off Financing ​Receivable, ​Originated,​ Gross Write-off, In ​Fiscal​ Year​ Before ​Latest ​Fiscal​ Year Financing ​Receivable, ​Originated,​ Gross Write-off, In ​Fiscal​ Year​ Before ​Latest ​Fiscal​ Year Incentive compensation fee percent (as a percent) Related Party Transaction, Expenses From Transactions With Related Party, Incentive Compensation Percentage Related Party Transaction, Expenses From Transactions With Related Party, Incentive Compensation Percentage Investment in mortgage loan, basis spread on variable rate Equity Method Investment, Investment In Mortgage Loan, Percent Financed, Basis Spread On Variable Rate Equity Method Investment, Investment In Mortgage Loan, Percent Financed, Basis Spread On Variable Rate Commercial real estate loans, loan held-for-sale Commercial Loans Held-For-Sale [Member] Commercial Loans Held-For-Sale Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Diligence and servicing fees Diligence And Servicing Fees [Member] Diligence And Servicing Fees Arizona ARIZONA Schedule of Allowance for Credit Losses Financing Receivable, Allowance for Credit Loss [Table Text Block] Common stock issued (in shares) Common Stock, Shares, Issued Beginning balance Ending balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Other Assets and Liabilities Other Assets Disclosure [Text Block] Preferred stock, dividends per share, annual (usd per share) Preferred Stock, Dividends Per Share, Annual Preferred Stock, Dividends Per Share, Annual Loan principal repayments held by a servicer Loan Principal Repayments Held By A Servicer, Asset Loan Principal Repayments Held By A Servicer, Asset Class of Stock [Line Items] Class of Stock [Line Items] California CALIFORNIA Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Consolidated Entity, Excluding VIE Consolidated Entity, Excluding VIE [Member] Termination Date Trading Arrangement Termination Date Favorable lease intangibles Favorable Lease Intangibles Favorable Lease Intangibles Subsequent Events [Abstract] Subsequent Events [Abstract] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Outstanding Principal % Mortgage Loans On Real Estate, Total Exposure Percentage Mortgage Loans On Real Estate, Total Exposure Percentage Other liabilities Other Liabilities [Abstract] Fair Value as of Grant Date Award Grant Date Fair Value Carrollton, TX Carrollton, TX [Member] Carrollton, TX Portland, OR Portland, OR [Member] Portland, OR Commercial Real Estate Loans Commercial Mortgage Loan [Member] Commercial Mortgage Loan [Member] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Stock repurchase program, remaining amount Share Repurchase Program, Remaining Authorized, Amount Total operating expenses Operating Costs and Expenses Arrangement Duration Trading Arrangement Duration Retail Retail Site [Member] Forward Contract - EUR Foreign Exchange Contract, Euro [Member] Foreign Exchange Contract, Euro Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Philadelphia Philadelphia, PA [Member] Philadelphia, PA Income (loss) from equity method investments Income (Loss) from Equity Method Investments Other assets Other Assets [Abstract] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Self-Storage Self Storage, Various [Member] Self Storage / various Vesting period (Years) Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Gross price of property sold Gain (Loss) on Disposition of Real Estate, Discontinued Operations Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Award Type [Domain] Award Type [Domain] Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Level 3 Fair Value, Inputs, Level 3 [Member] Repurchase of common stock (in shares) Treasury Stock, Shares, Acquired 2026 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year One Geographical [Axis] Geographical [Axis] Other assets Other assets Total Other Assets In-place Lease Intangible Assets Real Estate Owned, In-Place Lease Intangible Assets [Abstract] Real Estate Owned, In-Place Lease Intangible Assets Investment Holdings [Line Items] Commercial Real Estate [Line Items] Commercial Real Estate Legal Entity [Axis] Legal Entity [Axis] Equity Method Investments Equity Method Investments [Policy Text Block] Cash, Cash Equivalents and Restricted Cash at Beginning of Period Cash, Cash Equivalents and Restricted Cash at End of Period Total cash, cash equivalents and restricted cash shown in the Condensed Consolidated Statements of Cash Flows Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Non-NEOs Non-NEOs [Member] Commercial Real Estate Loans Financing Receivable, Allowance for Credit Loss [Roll Forward] Equity interest (as a percent) Equity Method Investment, Ownership Percentage Schedule of Secured Term Loan Schedule of Debt [Table Text Block] Investment, Name [Domain] Investment, Name [Domain] Georgia GEORGIA 2027 Long-Term Debt, Maturity, Year One Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Impaired/Loss Likely Unlikely to be Collected Financing Receivable [Member] Payments to reacquire common stock Payments for Repurchase of Common Stock Statistical Measurement [Axis] Statistical Measurement [Axis] Collateralized loan obligations, net Collateralized Loan Obligation, Net [Member] Collateralized Loan Obligation, Net [Member] Schedule Of Derivatives Financial Instruments Derivative Instruments, Gain (Loss) [Table Text Block] Commercial Real Estate Loans SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Text Block] Award Type [Axis] Award Type [Axis] 2026 Lessor, Operating Lease, Payment to be Received, Remainder of Fiscal Year Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Accumulated deficit Retained Earnings (Accumulated Deficit) Florida FLORIDA Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Washington D.C. DISTRICT OF COLUMBIA Proceeds from issuance of secured term loan Proceeds from Issuance of Secured Debt Common Stock Common Stock [Member] Raleigh, NC Raleigh, NC [Member] Raleigh, NC Derivative Contract [Domain] Derivative Contract [Domain] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Colorado COLORADO Schedule of Net Interest Income Included in Consolidated Statement of Income Schedule Of Net Assets Under Secured Borrowings [Table Text Block] Schedule Of Net Assets Under Secured Borrowings Real Estate Property Ownership [Axis] Real Estate Property Ownership [Axis] Total Liabilities and Equity Liabilities and Equity Employee Stock Option Share-Based Payment Arrangement, Option [Member] Purchase / Consolidation of CMBS trust/ Repayments Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Noncontrolling interests in equity of consolidated joint ventures Equity, Attributable to Noncontrolling Interest Variable Interest Entities, Name [Axis] Variable Interest Entities, Name [Axis] Variable Interest Entities, Name [Axis] KREF Lending XVI KREF Lending XVI [Member] KREF Lending XVI Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Mixed Use Mixed Use [Member] Mixed Use Related Party [Domain] Related and Nonrelated Parties [Domain] Tabular List, Table Tabular List [Table Text Block] Additional paid-in capital Additional Paid in Capital Related party transaction expenses Related Party Transaction, Expenses from Transactions with Related Party1 Related Party Transaction, Expenses from Transactions with Related Party1 Name Awards Close in Time to MNPI Disclosures, Individual Name Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Cash liquidity covenant amount (greater of) Debt Instrument, Covenant, Cash Liquidity Amount, Threshold Debt Instrument, Covenant, Cash Liquidity Amount, Threshold Current year, write-off Financing ​Receivable, ​Originated,​ Gross Write-off, In​ Current ​Fiscal​ Year Financing ​Receivable, ​Originated,​ Gross Write-off, In​ Current ​Fiscal​ Year Long-Lived Asset, Class [Domain] Long-Lived Asset, Class [Domain] Transfer to real estate owned Real Estate Owned, Transfer to Real Estate Owned Recourse Recourse Debt [Member] Recourse Debt [Member] Principal outstanding Loan, Held-in-Portfolio, Principal Outstanding Adjustment to Compensation: Adjustment to Compensation [Axis] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Cash paid during the period for interest Interest Paid, Excluding Capitalized Interest, Operating Activity General and Administrative Expenses Selling, General and Administrative Expenses, Policy [Policy Text Block] Participating securities' share in earnings Less: Participating securities' share in earnings Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Credit Facility [Axis] Credit Facility [Axis] Assets, fair value Consolidated variable interest entities assets, CMBS trusts, at fair value Assets, Fair Value Disclosure Name Measure Name Assets, principal balance Assets, Gross Assets, Gross Illinois ILLINOIS Write-offs charged Off-Balance Sheet, Credit Loss, Liability, Writeoff Off-Balance Sheet, Credit Loss, Liability, Writeoff Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Debt Instrument [Line Items] Debt Instrument [Line Items] Interest income Interest and Fee Income, Financing Receivable Additional Paid-In Capital Additional Paid-in Capital [Member] KREF Lending XIII KREF Lending XIII [Member] KREF Lending XIII Thereafter Lessor, Operating Lease, Payment to be Received, After Year Four Lessor, Operating Lease, Payment to be Received, After Year Four Originations and fundings of commercial real estate loans Payment for Acquisition, Loan, Held-for-Investment Accrued interest receivable Interest Receivable Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and cash equivalents Cash Cash and Cash Equivalent KREF KKR Real Estate Finance Trust Inc. [Member] KKR Real Estate FInance Trust Inc. Company Selected Measure Amount Company Selected Measure Amount Depreciation and amortization Depreciation, Depletion and Amortization Stock-based compensation, net (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Investments in CMBS securities Investments In CMBS Securities, Fair Value Disclosure Investments In CMBS Securities, Fair Value Disclosure Real Estate [Abstract] 2031 Long-Term Debt, Maturity, Year Five Allowance for credit loss Beginning balance, total Ending balance, total Allowance For Credit Loss Allowance For Credit Loss Repurchase Agreement Counterparty [Line Items] Repurchase Agreement Counterparty [Line Items] Non-PEO NEO Non-PEO NEO [Member] Subsidiary, Sale of Stock [Line Items] Subsidiary, Sale of Stock [Line Items] REO JV REO JV [Member] REO JV Gain (loss) on foreign currency translation (includes unrealized gains (losses) of $2,547 and ($2,829) in 2026 and $0 and $0 in 2025, respectively) Gain (Loss), Foreign Currency Transaction, before Tax Net income (loss) Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest Award Timing Method Award Timing Method [Text Block] Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Less: Accumulated depreciation Real Estate Owned, Accumulated Depreciation KREF 2022-FL3 KREF 2022-FL3 [Member] KREF 2022-FL3 Collateralized Loan Obligations Transfers and Servicing of Financial Assets [Text Block] 2028 Lessor, Operating Lease, Payment to be Received, Year Two Net Income (Loss) Attributable to KKR Real Estate Finance Trust Inc. and Subsidiaries Net Income (Loss) Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Restatement Determination Date: Restatement Determination Date [Axis] Revenue from real estate owned operations Profit (Loss) from Real Estate Operations Interest Expense Interest Expense, Policy [Policy Text Block] Gain (loss) on foreign currency translation Off-Balance Sheet, Credit Loss, Foreign Currency Translation Gain (Loss) Off-Balance Sheet, Credit Loss, Foreign Currency Translation Gain (Loss) Collateralized Loan Obligation Instrument [Axis] Collateralized Loan Obligation Instrument [Axis] Collateralized Loan Obligation Instrument Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Weighted Average Number of Shares of Common Stock Outstanding Shares Weighted Average Number of Shares Outstanding, Diluted [Abstract] New Jersey NEW JERSEY Statistical Measurement [Domain] Statistical Measurement [Domain] Document Fiscal Year Focus Document Fiscal Year Focus North Carolina NORTH CAROLINA Restricted Stock Units Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Notes receivable, gross write-off Notes Receivable Gross Write-off Notes Receivable Gross Write-off KREF Manager KREF Manager [Member] KREF Manager Common stock, $0.01 par value, 300,000,000 authorized (60,929,760 shares issued and 58,577,948 outstanding as of June 30, 2026; 65,488,680 shares issued and 64,367,737 shares outstanding as of December 31, 2025) Common Stock, Value, Issued Interest expense Interest Expense, Operating and Nonoperating Schedule of Restricted Stock Unit Activity Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Goldman Sachs Goldman Sachs Bank USA [Member] Goldman Sachs Bank USA [Member] Schedule of Debt Instruments Schedule of Long-Term Debt Instruments [Table Text Block] Missouri MISSOURI Minnesota MINNESOTA Total Allowance For Credit Losses [Roll Forward] Allowance For Credit Losses Secured financing agreements, net Line of Credit [Member] Restatement Determination Date Restatement Determination Date Provision for credit losses, net Provision for credit losses, net Provision for (reversal of) credit losses, net Credit Loss Expense (Reversal) Credit Loss Expense (Reversal) Ohio OHIO Industrial Industrial Property [Member] Annual dividend rate (usd per share) Preferred Stock, Dividend Rate, Per-Dollar-Amount Assets Asset Real Estate Owned, Assets [Abstract] Real Estate Owned, Assets Management Agreement Management Agreement [Member] Management Agreement [Member] Amendment Flag Amendment Flag Schedule of Notional Amounts of Outstanding Derivative Positions Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block] Originations and future fundings, net SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, New Mortgage Loan Preferred stock, redemption price (usd per share) Preferred Stock, Redemption Price Per Share New York NEW YORK Nevada NEVADA Co-op Co-operative Property [Member] Co-operative Property Term Loan Facility Term Loan Facility I [Member] Term Loan Facility I [Member] KREF Lending XIX - GBP KREF Lending XIX - GBP [Member] KREF Lending XIX - GBP Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Principal repayments on borrowings under secured term loan Principal Repayments On Borrowings Under Secured Term Loan Principal Repayments On Borrowings Under Secured Term Loan Entity Address, State or Province Entity Address, State or Province PEO Total Compensation Amount PEO Total Compensation Amount Share Repurchase Program [Domain] Share Repurchase Program [Domain] Notional Amount Derivative, Notional Amount Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Schedule of Expenses and Amounts Due to Related Parties Schedule of Related Party Transactions [Table Text Block] Secured term loan, net Secured Debt Year two, write-off Financing​ Receivable, ​Originated,​ Gross Write-off, Two ​Years​ Before​ Latest​ Fiscal ​Year Financing​ Receivable, ​Originated,​ Gross Write-off, Two ​Years​ Before​ Latest​ Fiscal ​Year KREF Lending XII KREF Lending XII [Member] KREF Lending XII Accretion of deferred loan fees and discounts Accretion Of Deferred Loan Costs And Discounts Accretion Of Deferred Loan Costs And Discounts Weighted average, coupon SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Interest Rate 2027 (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Restricted Stock Awards Expected to Vest Two Years from Balance Sheet Date Share-based Compensation Arrangement by Share-based Payment Award, Restricted Stock Awards Expected to Vest Two Years from Balance Sheet Date Manufactured Housing Manufactured Housing [Member] Manufactured Housing Maryland MARYLAND Gain (loss) on foreign currency translation Financing Receivable, Allowance for Credit Loss, Foreign Currency Translation Massachusetts MASSACHUSETTS KREF Lending XX - EUR KREF Lending XX - EUR [Member] KREF Lending XX - EUR Accrued interest receivable, net Increase (Decrease) in Accrued Interest Receivable, Net Allowance for credit losses on unfunded commitments Unfunded Commitments, Allowance for Credit Loss Unfunded Commitments, Allowance for Credit Loss Document Information [Line Items] Document Information [Line Items] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Vested (in shares) Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Payments of preferred stock dividends Payments of Ordinary Dividends, Preferred Stock and Preference Stock Class of Stock [Axis] Class of Stock [Axis] Outstanding Principal Mortgage Loans On Real Estate, Total Exposure Mortgage Loans On Real Estate, Total Exposure Net Income (Loss) Attributable to Common Stockholders Net Income (Loss) Available to Common Stockholders, Basic Commercial Real Estate Loans [Line Items] Commercial Real Estate Loans [Line Items] Commercial Real Estate Loans [Line Items] Maximum Facility Size Line of Credit Facility, Maximum Borrowing Capacity Minimum net worth required for compliance Banking Regulation, Mortgage Banking, Net Worth, Minimum Commitment to invest in aggregator vehicle Commitment to Invest in Aggregator Vehicle [Member] Commitment to Invest in Aggregator Vehicle [Member] Series A preferred dividends declared Preferred stock dividends declared Dividends, Preferred Stock Real estate owned - buildings Buildings Buildings Subsidiary or Equity Method Investee, Sale of Stock by Subsidiary or Equity Investee [Table] Subsidiary or Equity Method Investee, Sale of Stock, Type [Table] Commercial real estate loans, held-for-investment, net Carrying Value Beginning balance Ending balance Commercial real estate loans, at fair value Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss Write-offs charged Write-offs charged Financing Receivable, Allowance for Credit Loss, Writeoff Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Earnings per Share Earnings Per Share, Policy [Policy Text Block] Net Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Noncontrolling Interests in Equity of Consolidated Joint Ventures Noncontrolling Interest [Member] Amortization of deferred debt issuance costs Amortization of Debt Issuance Costs Wells Fargo Wells Fargo Bank, National Association [Member] Wells Fargo Bank, National Association [Member] Period of weighted average adjusted equity (Months) Related Party Transaction, Expenses From Transactions With Related Party, Denominator For Incentive Compensation, Period Of Adjusted Equity Related Party Transaction, Expenses From Transactions With Related Party, Denominator For Incentive Compensation, Period Of Adjusted Equity Carrying value Beginning balance Ending balance Carrying value, financing provided Carrying value Amortized cost and carrying value Long-Term Debt Payment to acquire interest in consolidated CMBS trust Payments To Acquire Interest In Collateralized Mortgage Backed Securities Trust Payments To Acquire Interest In Collateralized Mortgage Backed Securities Trust Assumption of other liabilities related to real estate owned Other Liabilities, Assumption Of Real Estate Other Liabilities, Assumption Of Real Estate Year two Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year Changes in operating assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Net cash provided by (used in) investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Equity Equity [Text Block] Security Exchange Name Security Exchange Name Valuation Approach and Technique [Axis] Valuation Approach and Technique [Axis] Liabilities, fair value Consolidated variable interest entities liabilities, CMBS trusts, at fair value Liabilities, Fair Value Disclosure Real estate owned assets, held-for-sale Real Estate, Held-for-Sale Gain (loss) on foreign currency translation Credit Loss, Foreign Currency Translation Gain (Loss) Credit Loss, Foreign Currency Translation Gain (Loss) Pennsylvania PENNSYLVANIA Net Interest Income Interest Income (Expense), Operating [Abstract] Name Outstanding Recovery, Individual Name Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Deferred Stock Units (DSUs) Deferred Stock Units [Member] Deferred Stock Units Management Incentive Plan Management Incentive Plan [Member] Management Incentive Plan [Member] Repayments Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset (Liability), Settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset (Liability), Settlements Geographical [Domain] Geographical [Domain] Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Oregon OREGON Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Unrecognized stock based compensation expense Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount Amortization of deferred debt issuance costs and discounts Amortization of Debt Issuance Costs and Discounts Collateralized loan obligations, net Commercial mortgage-backed securities, at fair value Collateralized Loan Obligations, Net Collateralized Loan Obligations, Net Unrealized gain (loss) on derivative instruments Unrealized loss (gain) on foreign currency forward contract Unrealized Gain (Loss) on Derivatives Debt Instrument, Increase (Decrease), Net [Roll Forward] Debt Instrument, Increase (Decrease), Net [Roll Forward] Debt Instrument, Increase (Decrease), Net [Roll Forward] Outstanding Principal Total Collateralized loan obligations Principal Long-Term Debt, Gross Assets related to real estate owned, held-for-investment Assets Related to Real Estate Owned, Held for Investment Assets Related to Real Estate Owned, Held for Investment Related Party Transactions [Abstract] Related Party Transactions [Abstract] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate Schedule [Table] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate Schedule [Table] Secured Financing Agreements, Net Debt, Policy [Policy Text Block] Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Diluted (in shares) Diluted weighted average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Loan balance, after restructuring SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages, After Restructuring SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages, After Restructuring Entity Emerging Growth Company Entity Emerging Growth Company Related Party Transaction [Line Items] Related Party Transaction [Line Items] Derivative Financial Instruments Derivatives, Policy [Policy Text Block] Commercial real estate loans, held-for-investment Amortized Cost Total Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss Underlying Security Market Price Change Underlying Security Market Price Change, Percent Derivative Financial Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Real estate owned Real Estate Owned [Member] Real Estate Owned Contributions to equity method investment, real estate asset Contributions To Equity Method Investment Contributions To Equity Method Investment Participating security dividends declared Dividends, Participating Securities Dividends, Participating Securities Provision for (reversal of) credit losses, net Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) Virginia VIRGINIA Modification accounted for as a repayment and new loan, net of write-off Financing Receivable, Modified in Period, Amount Repurchased Stock Treasury Stock, Common [Member] Real estate owned - furniture and fixtures Furniture and Fixtures, Gross Weighted average life (years) Mortgage Loans On Real Estate, Weighted Average Life Mortgage Loans On Real Estate, Weighted Average Life Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Schedule of Income (Loss) From Real Estate Owned Income (Loss) From Real Estate Owned [Table Text Block] Income (Loss) From Real Estate Owned Transfers and Servicing [Abstract] Transfers and Servicing [Abstract] Wisconsin WISCONSIN Unvested, beginning balance, weighted average grant date fair value (usd per share) Unvested. ending balance, weighted average grant date fair value (usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Unamortized origination discounts and deferred nonrefundable fees Mortgage Loans on Real Estate, Unamortized Discounts, Deferred Fees, And Cost Recovery Interest Mortgage Loans on Real Estate, Unamortized Discounts, Deferred Fees, And Cost Recovery Interest All Executive Categories All Executive Categories [Member] Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] Washington WASHINGTON Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Structuring fees Structuring Fees [Member] Structuring Fees [Member] Reconciliation of cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation [Abstract] Repayments Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Morgan Stanley - GBP/EUR Morgan Stanley - GBP/EUR [Member] Morgan Stanley - GBP/EUR Chicago, IL Chicago, IL [Member] Chicago, IL Tennessee TENNESSEE Percent of Stockholders' Equity Repurchase Agreement Counterparty, Amount At Risk, Percent Of Stockholders' Equity Repurchase Agreement Counterparty, Amount At Risk, Percent Of Stockholders' Equity Schedule of Earnings (Loss) Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Minimum Minimum [Member] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Consolidated Variable Interest Entities Assets and Liabilities, CMBS Trusts, at Fair Value Consolidation and Equity Method Investments Variable Interest Entity Disclosure [Text Block] Liabilities Liabilities [Abstract] Future funding commitment related to commercial mortgage loan investments Future Funding Commitment Related to Commercial Mortgage Loan Investments [Member] Future Funding Commitment Related to Commercial Mortgage Loan Investments [Member] Common stock and preferred stock, shares authorized (in shares) Common Stock And Preferred Stock, Shares Authorized Common Stock And Preferred Stock, Shares Authorized Income Statement Location [Axis] Location, Statement of Income, Balance [Axis] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Accrued interest receivable Financing Receivable, Accrued Interest, after Allowance for Credit Loss Other liabilities Total Other Liabilities Common dividends declared Dividends paid Dividends, Common Stock 2026 Below Market Lease, Amortization Income, Year One Real Estate Owned Real Estate Owned [Text Block] Common stock authorized (in shares) Common Stock, Shares Authorized Sale of stock, number of shares issued in transaction (in shares) Sale of Stock, Number of Shares Issued in Transaction Exercise Price Award Exercise Price Recurring Fair Value, Recurring [Member] Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Real estate owned, net Real Estate Owned, Net Real Estate Owned, Net Stock repurchase program, authorized amount (up to) Share Repurchase Program, Authorized, Amount Year three, write-off Financing ​Receivable,​ Originated,​ Gross Write-off, Three​ Years​ Before ​Latest ​Fiscal​ Year Financing ​Receivable,​ Originated,​ Gross Write-off, Three​ Years​ Before ​Latest ​Fiscal​ Year Purchase / Consolidation of CMBS trust Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset (Liability), Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset (Liability), Purchases Document Annual Report Document Quarterly Report Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Minneapolis, MN Minneapolis, MN [Member] Minneapolis, MN Texas TEXAS Morgan Stanley, Wells Fargo, Goldman Sachs Morgan Stanley, Wells Fargo, Goldman Sachs [Member] Morgan Stanley, Wells Fargo, Goldman Sachs Lender Name [Axis] Lender Name [Axis] Low Risk Special Mention [Member] KREF Lending XV KREF Lending XV [Member] KREF Lending XV Accrued interest payable Interest Payable Unconsolidated Enity Unconsolidated Enity [Member] Unconsolidated Enity Preferred stock liquidation preference (usd per share) Preferred Stock, Liquidation Preference Per Share Issuance discount costs Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Equity method investments Equity Method Investments Equity Component [Domain] Equity Component [Domain] Unrealized gain (loss) included in change in net assets of consolidated variable interest entities, CMBS trusts Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Measurement Input Type [Domain] Measurement Input Type [Domain] Commercial mortgage loans, held-for-investment, net, fair value Loans Receivable, Fair Value Disclosure Real Estate Properties [Domain] Real Estate Properties [Domain] Adoption Date Trading Arrangement Adoption Date Recourse limit Long-term Debt, Recourse Limit Percent Long-term Debt, Recourse Limit Percent Counterparty Name [Domain] Counterparty Name [Domain] Real estate owned, held-for-investment Real Estate Owned, Held For Investment [Member] Real Estate Owned, Held For Investment Total other income Nonoperating Income (Expense) Nonrecourse Nonrecourse Debt [Member] Nonrecourse Debt [Member] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Accounting Policies [Abstract] Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Net proceeds (payment) on sale of real estate owned, held-for-investment Payment for (Proceeds from) Real Estate, Held-for-Investment Weighted Average Maturity (Years) Derivative, Average Remaining Maturity Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Principal repayments Repayments of Debt Contribution by noncontrolling interests Noncontrolling Interest, Increase from Subsidiary Equity Issuance Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Rental income Operating Lease, Lease Income Restricted stock units Restricted Stock Units (RSUs) [Member] Schedule of Amortization of Lease Intangibles Real Estate Owned, Amortization Of Lease Intangibles Included In Income [Table Text Block] Real Estate Owned, Amortization Of Lease Intangibles Included In Income Weighted Average Weighted Average [Member] All Adjustments to Compensation All Adjustments to Compensation [Member] Income Taxes Income Tax, Policy [Policy Text Block] Net cash provided by (used in) operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Preferred stock, liquidation preference Preferred Stock, Liquidation Preference, Value Other Europe Other Europe Countries [Member] Other Europe Countries Average Risk Substandard [Member] Income Statement [Abstract] Income Statement [Abstract] Document Transition Report Document Transition Report Fair Value, Option, Quantitative Disclosures [Line Items] Fair Value, Option, Quantitative Disclosures [Line Items] Operating Expenses Operating Expenses [Abstract] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Liabilities, principal balance Liabilities, Gross Liabilities, Gross Other U.S. Other Other-US [Member] Other-US City Area Code City Area Code Investments in CMBS securities, measurement input Investments In CMBS Securities, Measurement Input Investments In CMBS Securities, Measurement Input Geographic concentration risk Geographic Concentration Risk [Member] Document Information [Table] Document Information [Table] Subsequent Events Subsequent Events [Text Block] Name Forgone Recovery, Individual Name Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Weighted Average Grant Date Fair Value Per RSU Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Total indebtedness covenant, percent of total assets, net of VIE liabilities (as a percent) Debt Instrument, Covenant, Total Indebtedness, Percent Of Total Assets Debt Instrument, Covenant, Total Indebtedness, Percent Of Total Assets Entity [Domain] Entity [Domain] Mountain View, CA Mountain View, CA [Member] Mountain View, CA Dividends Payable Dividends [Policy Text Block] Dividends [Policy Text Block] HSBC Facility HSBC [Member] HSBC [Member] Preferred stock issued (in shares) Preferred Stock, Shares Issued Consolidated variable interest entities liabilities, CMBS trusts, at fair value Total Liabilities Collateralized Loan Obligation, Including Interest, Net Collateralized Loan Obligation, Including Interest, Net Acquisition of other assets related to real estate owned Acquisition Of Real Estate Owned, Other Assets Acquisition Of Real Estate Owned, Other Assets Stock-Based Compensation Share-Based Payment Arrangement [Policy Text Block] Long-term Purchase Commitment, Category of Item Purchased [Domain] Long-Term Purchase Commitment, Category of Item Purchased [Domain] Other assets Increase (Decrease) in Other Operating Assets Forward Contract - GBP Foreign Exchange Contract, Pound [Member] Foreign Exchange Contract, Pound Secured Term Loan, Net [Abstract] Secured Term Loan, Net Share-based compensation expense Share-Based Payment Arrangement, Expense Schedule of Assets and Liabilities Included in Consolidated Balance Sheet Schedule of Assets and Associated Liabilities Accounted for as Secured Borrowings [Table Text Block] Measurement Basis [Axis] Measurement Basis [Axis] Repurchase and retirement of common stock (in shares) Repurchased common stock retired (in shares) Stock Repurchased and Retired During Period, Shares Distribution priority Variable Interest Entity, Primary Beneficiary, Distribution Priority, Amount Variable Interest Entity, Primary Beneficiary, Distribution Priority, Amount Granted, weighted average grant date fair value (usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Other Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Other Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Other Subsequent Event Type [Domain] Subsequent Event Type [Domain] Real estate owned Real Estate Owned, Gross Real Estate Owned, Gross Forfeited/ cancelled, weighted average grant date fair value (usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Repurchased Stock Stockholders' Equity, Policy [Policy Text Block] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Schedule of Fair Value Level 3 Inputs, Liabilities Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Payments of debt and collateralized debt obligation issuance costs Deferred debt issuance costs Payments of Debt Issuance Costs Entity Current Reporting Status Entity Current Reporting Status Net cash provided by (used in) financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Payment to acquire real estate owned Real estate acquisition costs Payments to Acquire Real Estate Payment-in-kind interest Payments For Interest Paid In Kind Payments For Interest Paid In Kind Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] 2029 Long-Term Debt, Maturity, Year Three Change in fair value of loan held-for-sale Change In Fair Value Of Loan Held-For-Sale Change In Fair Value Of Loan Held-For-Sale Management and Incentive Compensation to Related Parties Management And Incentive Compensation To Affiliate [Policy Text Block] Management and Incentive Compensation to Affiliate [Policy Text Block] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Cash Flows From Financing Activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Life Science Life Science [Member] Life Science Commercial Real Estate Loans, Held-For-Sale Financing Receivable, Held-for-Sale [Policy Text Block] Participating security dividends declared per share (usd per share) Participating Security Dividends, Per Share, Declared Participating Security Dividends, Per Share, Declared Financial Instruments [Domain] Financial Instruments [Domain] Ownership percentage of partner (as a percent) Variable Interest Entity, Qualitative Or Quantitative Information, Ownership Percentage Of Partner Variable Interest Entity, Qualitative Or Quantitative Information, Ownership Percentage Of Partner Year four Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year Earnings Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Foreign currency forward contracts Derivative Asset Underlying Securities Award Underlying Securities Amount Fair Value Estimate of Fair Value Measurement [Member] Prior, write-off Financing​ Receivable, ​Originated,​ Gross Write-off, Five​ Or​ More ​Years ​Before ​Latest​ Fiscal ​Year Financing​ Receivable, ​Originated,​ Gross Write-off, Five​ Or​ More ​Years ​Before ​Latest​ Fiscal ​Year Real estate owned liabilities, held-for-sale Real Estate Owned, Liabilities, Held For Sale Real Estate Owned, Liabilities, Held For Sale Subordinated Note Subordinated Note [Member] Subordinated Note Series A Preferred Stock Preferred Stock [Member] KREF Lending XIV KREF Lending XIV [Member] KREF Lending XIV Number of shares available for awards ( in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Schedule of Related Party Transactions, by Related Party [Table] Related Party Transaction [Table] Number of Contracts Derivative, Number of Instruments Held Beginning balance, unfunded loan commitments Ending balance, unfunded loan commitments Off-Balance-Sheet, Credit Loss, Liability Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Beginning balance Ending balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Carrying value SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate Current Fiscal Year End Date Current Fiscal Year End Date Common stock (in shares) Investment Owned, Balance, Shares Issued and outstanding common stock owned, percentage (as a percent) Investment Owned, Percentage Investment Owned, Percentage Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Repurchase of common stock (in shares) Repurchase of common stock (in shares) Stock Repurchased During Period, Shares Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Dividends declared per share of common stock (usd per share) Dividends declared per share of common stock (usd per share) Common Stock, Dividends, Per Share, Declared Entity File Number Entity File Number Office Office Building [Member] Collateralized Loan Obligation Instrument [Domain] Collateralized Loan Obligation Instrument [Domain] Collateralized Loan Obligation Instrument [Domain] Trailing average period applied to termination fee multiple under management agreement (Months) Related Party Transaction, Trailing Period Applied To Multiple For Termination Fee Related Party Transaction, Trailing Period Applied To Multiple For Termination Fee Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Dividends declared per share of preferred stock (usd per share) Preferred Stock, Dividends Per Share, Declared Measure: Measure [Axis] Repurchased stock (in shares) Treasury Stock, Common, Shares Spain SPAIN Equity Components [Axis] Equity Components [Axis] Revenue from REO operations Property Operating Revenue Property Operating Revenue Related party Related Party [Member] Schedule of Asset Acquisition Asset Acquisition [Table Text Block] Entity Interactive Data Current Entity Interactive Data Current Net income (loss) attributable to noncontrolling interests Net income (loss) attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Deferred financing/debt issuance costs Debt Issuance Costs, Line of Credit Arrangements, Net Entity Small Business Entity Small Business Variable interest entity liabilities, CMBS trust, measurement input Variable Interest Entity Liabilities, CMBS Trust, Measurement Input Variable Interest Entity Liabilities, CMBS Trust, Measurement Input Unamortized discount Debt Instrument, Unamortized Discount Repayments Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements Loan count (in loans) Number of loans (in loans) SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Number of Loans Total net interest income Net interest income Interest Income (Expense), Operating MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Document Type Document Type Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Cambridge, MA Cambridge, MA [Member] Cambridge, MA Other operating income Other Real Estate Operations Income Other Real Estate Operations Income Subsequent Event [Line Items] Subsequent Event [Line Items] Schedule of RSUs Outstanding to Vest Share-Based Compensation Arrangements by Share-Based Payment Award, Restricted Stock Units, Vested and Expected to Vest [Table Text Block] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number Outstanding Principal Principal Amount Commercial real estate loans, held-for-investment, net, principal balance SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages Income (Loss) Before Income Taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Commitments and Contingencies (Note 15) Commitments and Contingencies Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Executive Category: Executive Category [Axis] Long-term Purchase Commitment [Table] Long-Term Purchase Commitment [Table] Consolidation of variable interest entities, CMBS Trust (incremental assets and liabilities) Consolidation Of Variable Interest Entities (Incremental Assets And Liabilities) Consolidation Of Variable Interest Entities (Incremental Assets And Liabilities) Counterparty Name [Axis] Counterparty Name [Axis] Commercial Loans Held For Investment and For Sale Commercial Loans Held For Investment and For Sale [Member] Commercial Loans Held For Investment and For Sale Liabilities and Equity Liabilities and Equity [Abstract] 2030 Lessor, Operating Lease, Payment to be Received, Year Four Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Schedule of Variable Interest Entities [Table] Variable Interest Entity [Table] Supplemental Disclosure of Cash Flow Information Supplemental Cash Flow Information [Abstract] PEO Name PEO Name Other Accrued Liabilities and Other Liabilities Cash paid during the period for income taxes Income Tax Paid, before Refund Received KREF Lending IX KREF Lending IX Facility [Member] KREF Lending IX Facility Long-Lived Asset, Class [Axis] Long-Lived Asset, Class [Axis] Unrealized gain (loss) included in change in net assets of consolidated variable interest entities, CMBS trusts Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset (Liability), Gain (Loss) Included in Earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset (Liability), Gain (Loss) Included in Earnings Real Estate Asset Real Estate Assets Real Estate Asset [Member] Real Estate Asset Principal repayments on borrowings under secured financing agreements Repayments of Secured Debt Loss (income) from equity method investments Increase (Decrease) In Equity Method Investments Increase (Decrease) In Equity Method Investments Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Derivative Instruments and Hedging Activities Disclosures [Table] Derivative Instruments and Hedging Activities Disclosures [Table] Carrying value, collateral assets Transfers Accounted for as Secured Borrowings, Assets, Carrying Amount Other Prepaid Expense and Other Assets Product concentration risk Product Concentration Risk [Member] Income Recognition Revenue [Policy Text Block] Preferred stock dividends Less: Preferred stock dividends Preferred Stock Dividends, Income Statement Impact Loss (gain) on foreign currency translation Debt Instrument, Gain (Loss) On Foreign Currency Debt Instrument, Gain (Loss) On Foreign Currency Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Purchase / Consolidation of CMBS trust/ Repayments Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Business and Organization Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Measurement Frequency [Domain] Measurement Frequency [Domain] Debt Instrument [Axis] Debt Instrument [Axis] Subsequent Event [Table] Subsequent Event [Table] Gain (loss) on foreign currency translation Financing Receivable, Foreign Currency Gain (Loss) Financing Receivable, Foreign Currency Gain (Loss) Stock-based compensation expense Share-Based Payment Arrangement, Noncash Expense Due to related parties Increase (Decrease) in Due to Affiliates Basic (usd per share) Basic common share (usd per share) Earnings Per Share, Basic BMO Facility BMO Harris [Member] BMO Harris [Member] Measurement Input Type [Axis] Measurement Input Type [Axis] Liabilities Liability Real Estate Owned, Liability [Abstract] Real Estate Owned, Liability Insider Trading Arrangements [Line Items] Schedule of Net Interest Income Included in Consolidated Statement of Income Schedule Of Net Interest Income Under Secured Borrowings [Table Text Block] Schedule Of Net Interest Income Under Secured Borrowings [Table Text Block] Investments in CMBS securities Investments In CMBS Securities [Member] Investments In CMBS Securities Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] Real Estate, Type of Property [Axis] Real Estate, Type of Property [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Cover [Abstract] Reclassifications Reclassification, Comparability Adjustment [Policy Text Block] United Kingdom UNITED KINGDOM Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Concentration of credit risk (as a percent) Concentration Risk, Percentage Equity Awards Adjustments Equity Awards Adjustments [Member] Real estate owned, held-for-sale Real Estate Owned, Held For Sale [Member] Real Estate Owned, Held For Sale Interest income to interest expense ratio Debt Instrument, Covenant, Interest Income to Interest Expense Ratio Debt Instrument, Covenant, Interest Income to Interest Expense Ratio Deferred tax assets, net Deferred Tax Assets, Net Schedule of Future Minimum Lease Payments Lessor, Operating Lease, Payment to be Received, Maturity [Table Text Block] Other liabilities Increase (Decrease) in Other Operating Liabilities Very Low Risk Pass [Member] Plan Name [Axis] Plan Name [Axis] Schedule of Activity of Loans Held-for-investment and Held-for-investment Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Termination fee Related Party Transaction, Termination Fee Multiple Related Party Transaction, Termination Fee Multiple Total KKR Real Estate Finance Trust Inc. Stockholders' Equity Parent [Member] Equity Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Payments for investments in CMBS securities Payments to Acquire Investments Forfeited/ cancelled (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Unrealized gain (loss) Debt Securities, Unrealized Gain (Loss) Transfer to loan held-for-sale Financing Receivable, Held-For-Investment, Transfer To Loan Held-For-Sale Financing Receivable, Held-For-Investment, Transfer To Loan Held-For-Sale General and administrative General and Administrative Expense Preferred stock authorized (in shares) Preferred Stock, Shares Authorized Schedule of Other Assets and Other Liabilities Schedule of Other Assets and Other Liabilities [Table Text Block] Transfer of Financial Assets and Financing Agreements Transfers and Servicing of Financial Assets, Policy [Policy Text Block] Commercial Mortgage-Backed Securities Commercial Mortgage-Backed Securities [Member] Number of real estate properties Number of Real Estate Properties Share Repurchase Program [Axis] Share Repurchase Program [Axis] Percent of investment in senior mortgage loan percentage financed Equity Method Investment, Investment In Mortgage Loan, Percent Financed Equity Method Investment, Investment In Mortgage Loan, Percent Financed Class of Stock [Domain] Class of Stock [Domain] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Number of quarters worth of compensation already paid (calendar quarters) Related Party Transaction, Expenses From Transactions With Related Party, Denominator For Incentive Compensation, Number Of Calendar Quarter's Compensation Subtracted Related Party Transaction, Expenses From Transactions With Related Party, Denominator For Incentive Compensation, Number Of Calendar Quarter's Compensation Subtracted Investment in CMBS Securities Investment, Policy [Policy Text Block] Remaining authorized amount Common Stock, Remaining Authorized Amount Common Stock, Remaining Authorized Amount Income Taxes Income Tax Disclosure [Text Block] Net proceeds (payment) on sale of real estate owned, held-for-sale Proceeds (Payment) On Sale Of Real Estate Owned, Held For Sale Proceeds (Payment) On Sale Of Real Estate Owned, Held For Sale Real estate owned - land Real Estate Acquired Through Foreclosure Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Realized gain (loss) on derivative instruments Gain (Loss) on Sale of Derivatives Entity Filer Category Entity Filer Category Director Director [Member] Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items] ATM Continuous Offering Program [Member] Continuous Offering Program [Member] Real estate owned - land improvements Land Improvements Ownership percentage in VIE (as a percent) Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Units outstanding (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number Entity Address, Address Line Two Entity Address, Address Line Two Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Schedule of Stock by Class [Table] Stock, Class of Stock [Table] KREF Lending VII KREF Lending VII [Member] KREF Lending VII Net Income (Loss) Net income (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest JV Partner JV Partner [Member] JV Partner SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Abstract] SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Abstract] Foreign currency forward contracts Derivative Liability Boston, MA Boston, MA [Member] Boston, MA Foreign Currency Foreign Currency Transactions and Translations Policy [Policy Text Block] Entity Address, Address Line One Entity Address, Address Line One Vested, weighted average grant date fair value (usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Commercial real estate loans, held-for-investment, net Commercial Loans Held-for-investment [Member] Commercial Loans Held-for-investment Income tax expense Income Tax Expense (Benefit) Collateralized loan obligations Collateralized Loan Obligations [Member] Other miscellaneous income Other Nonoperating Income Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Hospitality Hospitality [Member] Hospitality Consolidation and Variable Interest Entities and Noncontrolling Interests Consolidation, Policy [Policy Text Block] Unfavorable lease intangibles Off-Market Lease, Unfavorable Primary beneficiary Variable Interest Entity, Primary Beneficiary [Member] Discounted cash flow Valuation Technique, Discounted Cash Flow [Member] Statement [Table] Statement [Table] Morgan Stanley Morgan Stanley Bank, N.A. [Member] Morgan Stanley Bank, N.A. [Member] Year one Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year Derivative Instruments and Hedging Activities Disclosures [Line Items] Derivative Instruments and Hedging Activities Disclosures [Line Items] Unrealized gain (loss), foreign currency transaction Unrealized loss (gain) on foreign currency translation Unrealized Gain (Loss), Foreign Currency Transaction, before Tax Management fee to related parties Management fees to related parties Management Fee To Affiliate Management Fee To Affiliate Real Estate Owned Financing Receivable, Real Estate Acquired Through Foreclosure [Policy Text Block] Category of Item Purchased [Axis] Category of Item Purchased [Axis] Derivative Instruments and Hedging Activities Disclosure [Abstract]