Schedule of share-based payment award, LTIP unit awards, valuation assumptions Schedule of Share-based Payment Award, LTIP Unit Awards, Valuation Assumptions [Table Text Block] Schedule of Share-based Payment Award, LTIP Unit Awards, Valuation Assumptions [Table Text Block] Common Stock, Dividends, Per Share, Cash Paid Common Stock, Dividends, Per Share, Cash Paid Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Deferred leasing intangible assets, accumulated amortization Deferred leasing intangibles assets, accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Limited Partners' Capital Account by Class [Axis] Limited Partners' Capital Account by Class [Axis] Forward Sale Agreements Outstanding Shares Forward Sale Agreements Outstanding Shares [Member] Forward Sale Agreements Outstanding Shares Range [Domain] Statistical Measurement [Domain] Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Five Common Stock Value Authorized under Stock Offering Program Common Stock Value Authorized under Stock Offering Program Represents the aggregate value of common stock which may be sold through sales agents under the stock offering program. Schedule of vested restricted shares of common stock activity Schedule of Vested Restricted Stock Units Activity [Table Text Block] Schedule of Vested Restricted Stock Units Activity [Table Text Block] Schedule of activity related to unvested LTIP unit awards Schedule of Nonvested Performance-Based Units Activity [Table Text Block] Award Timing Predetermined Award Timing Predetermined [Flag] 2026 Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Weighted average interest rate Long-Term Debt, Weighted Average Interest Rate, at Point in Time Entity File Number Entity File Number Additional Paid-in Capital Additional Paid-in Capital [Member] Interest rate swap Interest Rate Swap [Member] Payment of loan fees and costs Payments of Financing Costs Tabular List, Table Tabular List [Table Text Block] Leases [Abstract] Leases [Abstract] Straight-line rental income Straight Line Rent Adjustments Major Property Class [Domain] Major Property Class [Domain] Recent Accounting Pronouncements Not Yet Adopted New Accounting Pronouncements, Policy [Policy Text Block] Accrued Income Receivable Accrued Income Receivable [Member] Chicago, IL Chicago, Illinois 5-26-2026 [Member] Chicago, Illinois 5-26-2026 Disposal Groups, Including Discontinued Operations Disposal Groups, Including Discontinued Operations [Table Text Block] Stock Compensation Plan Share-Based Payment Arrangement [Member] Greenville, SC Greenville, South Carolina 5-26-2026 [Member] Greenville, South Carolina 5-26-2026 Change in additions of land, building, and improvements included in accounts payable, accrued expenses and other liabilities Capital Expenditures Incurred but Not yet Paid, Net Capital Expenditures Incurred but Not yet Paid, Net Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Adjustment to Compensation: Adjustment to Compensation [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Accounts payable, accrued expenses and other liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Proceeds from unsecured notes Proceeds from Unsecured Notes Payable Stock, Class of Stock [Table] Stock, Class of Stock [Table] Other comprehensive income (loss) Other comprehensive income Other Comprehensive Income (Loss), Net of Tax Noncontrolling interest in operating partnership Noncontrolling Interest in Operating Partnerships Total All Long-Term Debt Instruments [Member] All Long-Term Debt Instruments Area (in square feet) Area of Real Estate Property Adjustment to Compensation, Amount Adjustment to Compensation Amount Sale of Stock, Agent Commission, Percentage Sale of Stock, Agent Commission, Percentage Sale of Stock, Agent Commission, Percentage $187.5 Million Unsecured Term Loan H $187.5 Million Unsecured Term Loan H [Member] $187.5 Million Unsecured Term Loan H Basis of Presentation Consolidation, Policy [Policy Text Block] Additions to building and other capital improvements from involuntary conversion Additions to building and other capital improvements from involuntary conversion Additions to building and other capital improvements from involuntary conversion Non-cash compensation expense Share-Based Payment Arrangement, Noncash Expense Fair value of LTIP units at issuance (in thousands) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Fair Value Notional amount assets Derivative Asset, Notional Amount Employee Stock Option Share-Based Payment Arrangement, Option [Member] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Deferred leasing intangible liabilities, accumulated amortization Below market lease, accumulated amortization Below Market Lease, Accumulated Amortization Accounts and Financing Receivables [Table] Accounts and Financing Receivables [Table] Loss on impairment Asset Impairment Charges Total stockholders’ equity Equity, Attributable to Parent Measurement Frequency [Axis] Measurement Frequency [Axis] Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax [Abstract] Insider Trading Policies and Procedures [Line Items] Share-based compensation Share-Based Payment Arrangement, Expense Common Stock, Shares Authorized Common Stock, Shares Authorized Mortgage note, net Secured Debt Proceeds from sales of common stock, net Stock Issued During Period, Shares, New Issues Total liabilities and equity Liabilities and Equity Noncontrolling Interest [Line Items] Noncontrolling Interest [Line Items] Fair value on recurring basis Fair Value, Recurring [Member] Proceeds from sales of common stock, net Proceeds From Issuance Of Common Stock, Net Proceeds From Issuance Of Common Stock, Net Cash and cash equivalents and restricted cash—beginning of period Cash and cash equivalents and restricted cash—end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation Liabilities and Equity Liabilities and Equity [Abstract] Amended Term Loan Agreement Amended Term Loan Agreement [Member] Amended Term Loan Agreement Major Property Class [Axis] Major Property Class [Axis] Cover page. Cover [Abstract] Maximum Maximum [Member] General and Administrative Expenses General and Administrative Expense [Member] Rental Property: Real Estate Investment Property, Net [Abstract] Less: income attributable to noncontrolling interest in operating partnership Income attributable to noncontrolling interest Net Income (Loss) Attributable to Noncontrolling Interest Accounting Policies [Abstract] Accounting Policies [Abstract] Deferred leasing intangibles, net Finite-Lived Intangible Assets, Net Net book value of properties that are collateral for debt arrangements Debt Instrument, Collateral Amount Schedule of Operating Lease Liability Maturity Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Restricted stock Restricted Stock [Member] Repayment of mortgage note Repayments of Secured Debt Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Debt Instrument [Line Items] Debt Instrument [Line Items] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Fair value of shares vested Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Pay vs Performance Disclosure [Line Items] El Paso, TX El Paso, TX Q3 2026 [Member] El Paso, TX Q3 2026 Operating lease liabilities Operating Lease, Liability Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Liabilities: Liabilities [Abstract] Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Entity Shell Company Entity Shell Company Schedule of aggregate carrying value of the debt and the corresponding estimate of fair value Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block] Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Additions to building and other capital improvements from non-cash compensation Share-Based Payment Arrangement, Amount Capitalized Income (loss) recognized in accumulated other comprehensive income on interest rate swaps Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Company Selected Measure Amount Company Selected Measure Amount 2028 Lessee, Operating Lease, Liability, to be Paid, Year Three Gain on involuntary conversion Gain on Involuntary Conversion Gain on Involuntary Conversion Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Debt modification expenses Debt Instrument, Modification Expenses, Amount Debt Instrument, Modification Expenses, Amount Gross debt issuance costs Debt Issuance Costs, Gross Comprehensive income attributable to STAG Industrial, Inc. Comprehensive Income (Loss), Net of Tax, Attributable to Parent Lease security deposits included in tenant prepaid rent and security deposits on the Balance Sheet Security Deposit Liability Name Measure Name Class of Stock [Line Items] Class of Stock [Line Items] Document Fiscal Period Focus Document Fiscal Period Focus Forward Sale Agreements Settled, Shares Forward Sale Agreements Settled, Shares [Member] Forward Sale Agreements Settled, Shares Fair value of the interest rate swaps outstanding Derivatives, Fair Value [Line Items] Unsecured Notes Unsecured Debt [Member] Award Timing Method Award Timing Method [Text Block] Net income per share attributable to common stockholders — basic Income (Loss) from Continuing Operations, Per Basic Share Award Type [Axis] Award Type [Axis] Principal outstanding Long-Term Debt Total assets Assets Assets Three months ended September 30, 2026 Acquisitions Q3 2026 [Member] Acquisitions Q3 2026 Cumulative Dividends in excess of Earnings Accumulated Distributions in Excess of Net Income [Member] Trading Symbol Trading Symbol 2029 Lessee, Operating Lease, Liability, to be Paid, Year Four Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Liabilities for uncertain tax positions Liability for Uncertainty in Income Taxes, Current Non-cash compensation activity (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture STAG Industrial, Inc Venture STAG Industrial, Inc Venture [Member] STAG Industrial, Inc Venture Entity Address, City or Town Entity Address, City or Town Cash flows from operating activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Receivable Type [Axis] Receivable Type [Axis] Building and land improvements, net of accumulated depreciation of $260,522 and $220,644, respectively Building and land improvements, net Building and land improvements, net Weighted average amortization period of lease intangibles Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Statement of Income Location, Balance [Domain] Statement of Income Location, Balance [Domain] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Emerging Growth Company Entity Emerging Growth Company Acquisitions of deferred leasing intangibles Payments to Acquire Intangible Assets Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Right-of-use assets obtained in exchange for new lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Operating Expense Operating Expense [Member] Repayment of unsecured credit facility Repayments of Lines of Credit 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] Level 2 Fair Value, Inputs, Level 2 [Member] Debt Issuance Costs, Net Unamortized debt issuance costs Debt Issuance Costs, Net Common Stock, Shares, Settled Common Stock, Shares, Settled Common Stock, Shares, Settled Restricted cash Restricted Cash and Cash Equivalent Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Gain on the sales of rental property, net Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal In-place leases Leases, Acquired-in-Place [Member] Common Stock, Shares, Outstanding Common Stock, Shares, Outstanding Below market leases Leases, Acquired-in-Place, Market Adjustment [Member] Tenant prepaid rent and security deposits Customer Advances and Deposits PEO PEO [Member] Gain on involuntary conversion Other Nonrecurring Gain Supplemental schedule of non-cash investing and financing activities Noncash Investing and Financing Items [Abstract] Granted/Issued Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period Schedule of share-based payment award, performance unit awards, valuation assumptions Schedule of Share-based Payment Award, Performance Unit Awards, Valuation Assumptions [Table Text Block] Schedule of Share-based Payment Award, Performance Unit Awards, Valuation Assumptions [Table Text Block] Change in assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [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] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Expected stock price volatility Expected stock price volatility Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate Accounts payable, accrued expenses and other liabilities Accounts Payable and Accrued Liabilities Shares Units Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Share-Based Payment Arrangement [Abstract] Income Statement [Abstract] Income Statement [Abstract] Interest rate swaps Derivative Asset Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Sale of Stock [Domain] Sale of Stock [Domain] Interest Expense Interest Expense [Member] Preferred Stock, Shares Issued Preferred Stock, Shares Issued Deferred leasing intangibles, net of accumulated amortization of $477,696 and $425,502, respectively Intangible Assets, Net (Excluding Goodwill) Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Above market leases Above Market Leases [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Income (loss) on interest rate swaps Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Net income per share attributable to common stockholders — diluted Income (Loss) from Continuing Operations, Per Diluted Share Total Stockholders' Equity Parent [Member] Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] $200 Million Unsecured Term Loan F $200 Million Unsecured Term Loan F [Member] $200 Million Unsecured Term Loan F [Member] Derivative, notional amount Derivative, Notional Amount Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Additions of other assets Payments to Acquire Other Productive Assets Summary of allocation of the consideration paid for the acquired assets and liabilities in connection with the acquisition of buildings at the date of acquisition Business Combination, Recognized Asset Acquired and Liability Assumed [Table Text Block] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] City Area Code City Area Code Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Mortgage Loans Payable Mortgages [Member] Buildings, net of accumulated depreciation of $950,502 and $855,290, respectively Rental Properties Unvested at beginning of period (in shares) Unvested at end of period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] New Forward Sale Agreements Sales Commissions New Forward Sale Agreements Sales Commissions [Member] New Forward Sale Agreements Sales Commissions Cash flows from investing activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] General and administrative General and Administrative Expense Settled Forward Sale Agreements Net Price Per Share Settled Forward Sale Agreements Net Price Per Share [Member] Settled Forward Sale Agreements Net Price Per Share Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Disposal Group, Disposed of by Sale, Not Discontinued Operations Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] Business Acquisition, Purchase Price Allocation Building and Land Improvements Business Acquisition, Purchase Price Allocation Building and Land Improvements Amount of acquisition cost of a business combination allocated to building and land improvements included in real estate. Preferred Stock, Par or Stated Value Per Share Preferred Stock, Par or Stated Value Per Share Lease, Cost Lease, Cost Risk free interest rate term Share-Based Compensation Arrangement By Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Expected Term Share-Based Compensation Arrangement By Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Expected Term Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Lease Cost Lease, Cost [Table Text Block] PEO Total Compensation Amount PEO Total Compensation Amount Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Forward Contract Indexed to Issuer's Equity, Forward Rate Per Share, Net Forward Contract Indexed to Issuer's Equity, Forward Rate Per Share, Net Forward Contract Indexed to Issuer's Equity, Forward Rate Per Share, Net Cash Flow Hedges of Interest Rate Risk Interest Rate Cash Flow Hedges [Abstract] Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment, Building Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment, Building Equity Components [Axis] Equity Components [Axis] Three months ended March 31, 2026 Acquisitions Q1 2026 [Member] Acquisitions Q1 2026 Real Estate Properties [Line Items] Real Estate Properties [Line Items] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Number of Reportable Segments Number of Reportable Segments Gain on the sales of rental property, net Gains (Losses) on Sales of Investment Real Estate Unsecured term loans, net Loans Payable Assumptions Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions and Methodology [Abstract] Unamortized fair market value discount Debt Instrument, Unamortized Discount (Premium), Net Acquisition deposits, net Payments for (Proceeds from) Deposits on Real Estate Acquisitions Interest and other income Interest and Other Income Supplemental disclosure: Supplemental Cash Flow Information [Abstract] Other Performance Measure, Amount Other Performance Measure, Amount Schedule of Cash, Cash Equivalents and Restricted Cash Restrictions on Cash and Cash Equivalents [Table Text Block] Entity Address, State or Province Entity Address, State or Province Antidilutive Security, Excluded EPS Calculation [Table] Antidilutive Security, Excluded EPS Calculation [Table] Dividends, Common Stock Dividends, Common Stock Unused borrowing capacity Debt Instrument, Unused Borrowing Capacity, Amount Dividends Dividends Forfeited Shares Issued, Shares, Share-Based Payment Arrangement, Forfeited Derivative Instrument [Axis] Derivative Instrument [Axis] Individual: Individual [Axis] Vesting [Axis] Vesting [Axis] Entities [Table] Entities [Table] Net cash used in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation 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] Fair value of performance units grant (in thousands) Share-based Compensation by Share-based Payment Award, Fair Value Assumptions, Estimated Fair Value Share-based Compensation by Share-based Payment Award, Fair Value Assumptions, Estimated Fair Value Cash paid for interest, net of amounts capitalized of $1,975 and $2,605 for 2026 and 2025, respectively Interest Paid, Excluding Capitalized Interest, Operating Activity Contributions from noncontrolling interest in joint ventures Proceeds from Noncontrolling Interests Document Fiscal Year Focus Document Fiscal Year Focus Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Noncontrolling interest ownership percentage Subsidiary, Ownership Percentage, Noncontrolling Owner Entity Interactive Data Current Entity Interactive Data Current Noncontrolling interest activity Noncontrolling Interest Activity [Table Text Block] Noncontrolling Interest Activity [Table Text Block] Unrecognized compensation costs, period for recognition Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Real Estate [Abstract] Real Estate [Abstract] Common Stock, Value, Settled Common Stock, Value, Settled Common Stock, Value, Settled Buildings, net of accumulated depreciation of $950,502 and $855,290, respectively Building [Member] Assets (liabilities): Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment, Land Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment, Land Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Ownership [Domain] Ownership [Domain] Contributions from noncontrolling interest in joint ventures Proceeds from (Payments to) Noncontrolling Interests Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Amortization expense related to other intangible lease assets Amortization of Intangible Assets New Forward Sale Agreements Value New Forward Sale Agreements Value [Member] New Forward Sale Agreements Value Acquisitions of land and buildings and improvements Payments for Capital Improvements Depreciation and amortization Depreciation, Depletion and Amortization Interest payable Interest Payable, Current Entity Central Index Key Entity Central Index Key PEO Name PEO Name Noncontrolling interest Increase (Decrease) in Partners' Capital [Roll Forward] Total revenue Revenues Deferred leasing intangibles, net of accumulated amortization of $36,010 and $34,098, respectively Below market lease, net Below Market Lease, Net Net proceeds from the sale of common stock Sale of Stock, Consideration Received on Transaction United of Omaha Life Insurance Company United of Omaha Life Insurance Company [Member] United of Omaha Life Insurance Company 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] Proceeds from sales of rental property, net Proceeds from Sale of Buildings Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Arrangement Duration Trading Arrangement Duration Tranche one Share-Based Payment Arrangement, Tranche One [Member] Greenville, SC Greenville, South Carolina 6-29-2026 [Member] Greenville, South Carolina 6-29-2026 Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Redemptions from Other Common Units to common stock Partners' Capital Account, Units, Converted Exercise Price Award Exercise Price Entity Filer Category Entity Filer Category Local Phone Number Local Phone Number Class of Stock [Domain] Class of Stock [Domain] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Unrecognized compensation costs Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Equity Incentive Plan Share-Based Payment Arrangement [Text Block] Stock Repurchased and Retired During Period, Shares Stock Repurchased and Retired During Period, Shares STAG Industrial, Inc NV Venture STAG Industrial, Inc NV Venture [Member] STAG Industrial, Inc NV Venture Assets Assets [Abstract] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Statement of Financial Position Location, Balance [Axis] Statement of Financial Position Location, Balance [Axis] Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract] Preferred Stock, Number of Shares, Par Value and Other Disclosure [Abstract] Vesting [Domain] Vesting [Domain] Debt Instrument [Axis] Debt Instrument [Axis] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Forward Sale Agreements Settled, Value Forward Sale Agreements Settled, Value [Member] Forward Sale Agreements Settled, Value Debt extinguishment and modification expenses Gain (Loss) on Extinguishment of Debt Net increase to rental income related to above and below market lease amortization Net increase (decrease) to rental income related to above and below market lease amortization Net increase (decrease) to rental income related to above and below market lease amortization Deferred leasing intangibles, gross Finite-Lived Intangible Assets, Gross Equity: Equity, Attributable to Parent [Abstract] Buildings and improvements, net of accumulated depreciation of $1,261,591 and $1,119,931, respectively Investment Building and Building Improvements 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] Number of states in which the entity owned buildings Number of States in which Entity Operates Entity Address, Address Line One Entity Address, Address Line One Chicago, IL Chicago, IL Q3 2026 [Member] Chicago, IL Q3 2026 Entity Address, Address Line Two Entity Address, Address Line Two Additional amount reclassified from accumulated other comprehensive income (loss) as a increase (decrease) to interest expense over the next twelve months Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Stated interest rate Debt Instrument, Interest Rate, Stated Percentage Debt extinguishment and modification expenses Gain (Loss) on Extinguishment of Debt, before Debt Issuance Cost Writeoff Sold buildings contribution to net income Disposal Group, Including Discontinued Operation, Operating Income (Loss) Distribution Made to Limited Partner, Cash Distributions Declared Distribution Made to Limited Partner, Cash Distributions Declared Schedule of Real Estate Properties Schedule of Real Estate Properties [Table Text Block] Ownership [Axis] Ownership [Axis] Derivative Financial Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Indianapolis, IN Indianapolis, Indiana 6-17-2026 [Member] Indianapolis, Indiana 6-17-2026 Land Land Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Fair Value as of Grant Date Award Grant Date Fair Value Tenant accounts receivable Accounts Receivable, after Allowance for Credit Loss Entity Registrant Name Entity Registrant Name Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Summary of the mortgage notes payable, unsecured term loans and credit facility Schedule of Long-Term Debt Instruments [Table Text Block] Total adjustments Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity Share-based compensation Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Granted (in shares) Granted Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Dallas, TX Dallas, Texas 4-28-2026 [Member] Dallas, Texas 4-28-2026 Relationship to Entity [Domain] Title and Position [Domain] Fair value - assets Interest Rate Derivative Assets, at Fair Value Total expenses Costs and Expenses Forfeited (in shares) Forfeited (in units) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Document Quarterly Report Document Quarterly Report Proceeds from sales of common stock, net Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs Long-term debt, fair value Long-Term Debt, Fair Value Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] 2027 Lessee, Operating Lease, Liability, to be Paid, Year Two Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Number of Operating Segments Number of Operating Segments Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Forward Sale Agreements Outstanding Value Forward Sale Agreements Outstanding Value [Member] Forward Sale Agreements Outstanding Value Acquisitions of land and buildings and improvements Payments to Acquire Commercial Real Estate LTIP Units Long Term Incentive Plan Units [Member] Represents details pertaining to long term incentive plan units. Kansas City, MO Kansas City, Missouri 6-23-2026 [Member] Kansas City, Missouri 6-23-2026 Fair value of restricted stock per share at grant date Fair value unit price per LTIP unit at issuance Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Schedule of Finite-Lived Intangible Assets and Below Market Leases Schedule of Finite-Lived Intangible Assets [Table Text Block] Prepaid expenses and other assets Prepaid Expense and Other Assets Restatement Determination Date: Restatement Determination Date [Axis] Non-cash compensation activity (in excess of earnings) Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Non-PEO NEO Non-PEO NEO [Member] Letters of credit outstanding Letters of Credit Outstanding, Amount Rebalancing of noncontrolling interest in operating partnership Noncontrolling Interest, Increase from Subsidiary Equity Issuance Schedule of interest rate swaps Schedule of Interest Rate Derivatives [Table Text Block] $187.5 Million Unsecured Term Loan I $187.5 Million Unsecured Term Loan I [Member] $187.5 Million Unsecured Term Loan I Sale of Stock [Axis] Sale of Stock [Axis] Notional amount liabilities Derivative Liability, Notional Amount Other intangible lease assets Other Intangible Assets [Member] Name Trading Arrangement, Individual Name Redemption of common units to common stock Stock Issued During Period, Value, Conversion of Units Equity Award [Domain] Award Type [Domain] 2027 Lessee, Operating Lease, Liability, to be Paid, Year One Equity Awards Adjustments Equity Awards Adjustments [Member] Tenant improvements, net of accumulated depreciation of $50,567 and $43,997, respectively Leasehold Improvements [Member] Schedule of Forward Contracts Indexed to Issuer's Equity Schedule of Forward Contracts Indexed to Issuer's Equity [Table Text Block] STAG Industrial, Inc KY Venture STAG Industrial, Inc KY Venture [Member] STAG Industrial, Inc KY Venture Additions of other assets Noncash or Part Noncash Acquisition, Other Assets Acquired Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Noncontrolling interest in joint ventures Noncontrolling Interest in Joint Ventures Noncontrolling Interest in Joint Ventures Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Compensation Amount Outstanding Recovery Compensation Amount Aggregate principal amount Debt Instrument, Face Amount Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Expected dividend yield Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Rental Property Real Estate Disclosure [Text Block] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Kansas City, MO Kansas City, Missouri 2-09-2026 [Member] Kansas City, Missouri 2-09-2026 Straight-line rent adjustments, net Straight Line Rent Derivative Instrument Name [Axis] Derivative Instrument Name [Axis] Derivative Instrument Name Recovery of Erroneously Awarded Compensation Disclosure [Line Items] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Name Awards Close in Time to MNPI Disclosures, Individual Name Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Other comprehensive (income) loss attributable to noncontrolling interest Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest Asset Acquisition [Line Items] Asset Acquisition [Line Items] Revenues [Abstract] Revenues [Abstract] Phoenix, AZ Phoenix, Arizona 4-30-2026 [Member] Phoenix, Arizona 4-30-2026 Non-cash compensation activity, net APIC, Share-Based Payment Arrangement, Increase for Cost Recognition STAG Industrial, Inc. STAG Industrial, Inc. [Member] STAG Industrial, Inc. Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Financial Instruments [Domain] Financial Instruments [Domain] Schedule of the location in the financial statements of the gain or loss recognized on interest rate swaps Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block] Statement of Income Location, Balance [Axis] Statement of Income Location, Balance [Axis] Performance shares Performance shares Performance Shares [Member] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Payments of Stock Issuance Costs, Agents' Fees Payments of Stock Issuance Costs, Agents' Fees Payments of Stock Issuance Costs, Agents' Fees Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Sale Of Stock, Accumulated Consideration Received On Transaction Sale Of Stock, Accumulated Consideration Received On Transaction Sale Of Stock, Accumulated Consideration Received On Transaction Interest Rate Swap Effective March 2027 Interest Rate Swap Effective March 2027 [Member] Interest Rate Swap Effective March 2027 Statement of Financial Position Location, Balance [Domain] Statement of Financial Position Location, Balance [Domain] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Minimum Minimum [Member] Acquisitions of land and buildings and improvements Acquisitions of land and buildings and improvements Acquisitions of land and buildings and improvements Repayment of unsecured notes Repayments of Notes Payable Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Company Selected Measure Name Company Selected Measure Name Debt Disclosure Debt Disclosure [Text Block] Preferred stock Preferred Stock, Value, Issued Aggregate Available Trading Arrangement, Securities Aggregate Available Amount New Forward Sale Agreements Gross Price Per Share New Forward Sale Agreements Gross Price Per Share [Member] New Forward Sale Agreements Gross Price Per Share Operating Lease, Payments Operating Lease, Payments Ownership interest in Operating Partnership (as a percent) Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Dividends and distributions payable Dividends Payable All Executive Categories All Executive Categories [Member] Stockholders' Equity Note [Abstract] Stockholders' Equity Note [Abstract] Other income Other Operating Income Common stock, par value $0.01 per share, 300,000,000 shares authorized at September 30, 2026 and December 31, 2025, 192,819,897 and 191,005,261 shares issued and outstanding at September 30, 2026 and December 31, 2025, respectively Common Stock, Value, Issued Less: amount allocated to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Tranche two Share-Based Payment Arrangement, Tranche Two [Member] Title and Position [Axis] Title and Position [Axis] Weighted average common shares outstanding — diluted Weighted Average Number of Shares Outstanding, Diluted Segment Reporting Segment Reporting, Policy [Policy Text Block] Commitments and contingencies (Note 11) Commitments and Contingencies Limited Partners' Capital Account, Class [Domain] Limited Partners' Capital Account, Class [Domain] Redemption of common units to common stock (in shares) Conversions from LTIP units to Other Common Units Stock Issued During Period, Shares, Conversion of Units Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Derivative [Table] Derivative [Table] Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Entity Small Business Entity Small Business Limited Partners' Capital Account, Units Outstanding Limited Partners' Capital Account, Units Outstanding New Forward Sale Agreements Net Price Per Share New Forward Sale Agreements Net Price Per Share [Member] New Forward Sale Agreements Net Price Per Share Noncontrolling Interest - Unit holders in Operating Partnership Noncontrolling Interest [Member] Fair Value - Liabilities Interest Rate Derivative Liabilities, at Fair Value Weighted Average Years(2)  Derivative, Average Remaining Maturity Preferred Stock, Shares Outstanding Preferred Stock, Shares Outstanding Facility fee Line of Credit Facility, Commitment Fee Amount Document Transition Report Document Transition Report Derivative Instrument Name [Domain] Derivative Instrument Name [Domain] Derivative Instrument Name [Domain] Unsecured Term Loans Long-Term Debt [Member] Noncontrolling Interest [Table] Noncontrolling Interest [Table] Underlying Securities Award Underlying Securities Amount Repayment of unsecured term loans Repayment of unsecured term loans Repayments of Other Long-Term Debt Equity Component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Asset Acquisition Asset Acquisition [Table Text Block] Total equity Balance Balance Equity, Including Portion Attributable to Noncontrolling Interest Schedule of stock sale activity Schedule of Stock Sales [Table Text Block] Tabular disclosure of sales of stock or previously unissued stock under a stock offering program. Does not include sales of stock by subsidiary or equity method investee. Document Type Document Type Level 3 Fair Value, Inputs, Level 3 [Member] Nine months ended September 30, 2026 Acquisitions Q3 2026 YTD [Member] Acquisitions Q3 2026 YTD Earnings Per Share Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Additional paid-in capital Additional Paid in Capital Income reclassified from accumulated other comprehensive income into income as interest expense Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax Number of instruments held Derivative, Number of Instruments Held Derivative Contract [Domain] Derivative Contract [Domain] Asset Acquisition [Domain] Asset Acquisition [Domain] Unsecured notes, net Notes Payable All Individuals All Individuals [Member] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Purchase Price (in thousands) Asset Acquisition, Consideration Transferred Name Forgone Recovery, Individual Name Range [Axis] Statistical Measurement [Axis] Capitalized interest paid Interest Paid, Capitalized, Investing Activity 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] Variable lease payments Operating Lease, Variable Lease Income Disposal Group Classification [Axis] Disposal Group Classification [Axis] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Income taxes paid on vested equity compensation Payment, Tax Withholding, Share-Based Payment Arrangement Other Common Units Other Noncontrolling Common Units [Member] Represents activity related to common units other than units issued through equity incentive plans. Basis spread on variable rate Derivative, Basis Spread on Variable Rate Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Net income attributable to common stockholders Net income attributable to common stockholders Net Income (Loss) Available to Common Stockholders, Basic Below market lease, gross Below Market Lease, Gross Entity Information [Line Items] Entity Information [Line Items] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Intangible Asset, Finite-Lived [Table] Intangible Asset, Finite-Lived [Table] Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Interim Financial Information Quarterly Financial Information [Text Block] Three months ended June 30, 2026 Acquisitions Q2 2026 [Member] Acquisitions Q2 2026 Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Level 1 Fair Value, Inputs, Level 1 [Member] Balance (in shares) Balance (in shares) Shares, Outstanding Unsecured credit facility Long-Term Line of Credit Equity Incentive Plan Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Leases Lessor, Operating Leases [Text Block] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Title of 12(b) Security Title of 12(b) Security Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Forward Contract Indexed to Issuer's Equity, Forward Rate Per Share Forward Contract Indexed to Issuer's Equity, Forward Rate Per Share Non-cash portion of interest expense Paid-in-Kind Interest Earnings Per Share [Abstract] Non-cash compensation activity, net APIC, Share-Based Payment Arrangement, Option, Increase for Cost Recognition Total other income (expense) Nonoperating Income (Expense) Subsidiary, Ownership Percentage, Parent Subsidiary, Ownership Percentage, Parent Proceeds from unsecured credit facility Proceeds from Unsecured Lines of Credit Asset Acquisition [Table] Asset Acquisition [Table] Adjustments to Additional Paid in Capital, Other Adjustments to Additional Paid in Capital, Other Noncontrolling Interest [Abstract] Noncontrolling Interest [Abstract] Accounts Payable and Accrued Liabilities Accounts Payable and Accrued Liabilities [Member] Less: Imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Award Timing Disclosures [Line Items] Long-term debt, gross Long-Term Debt, Gross Fair Value, Measurement Frequency [Domain] Measurement Frequency [Domain] Lessee, Operating Lease, Liability, Payments, Due Lessee, Operating Lease, Liability, Payments, Due Lessee, Operating Lease, Liability, to be Paid Lessee, Operating Lease, Renewal Term Lessee, Operating Lease, Renewal Term Proceeds from unsecured term loans Proceeds from Issuance of Other Long-Term Debt Equity Equity [Text Block] Net income attributable to STAG Industrial, Inc. Net Income (Loss) Attributable to Parent Operating Lease, Lease Income Operating Lease, Lease Income [Table Text Block] Expiration Date Trading Arrangement Expiration Date Tenant prepaid rent and security deposits Increase (Decrease) in Customer Advances and Deposits Total rental property, net Total rental property, net Real Estate Investment Property, Net Fixed lease payments Operating Lease, Lease Income, Lease Payments Vesting period (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Preferred Stock, Shares Authorized Preferred Stock, Shares Authorized Numerator Net Income (Loss) Attributable to Parent [Abstract] Adoption Date Trading Arrangement Adoption Date Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Tenant accounts receivable Increase (Decrease) in Accounts Receivable Entity Current Reporting Status Entity Current Reporting Status Lessee, Operating Lease, Term of Contract Lessee, Operating Lease, Term of Contract Risk Management Objective of Using Derivatives Derivative [Line Items] Amortization of above and below market leases, net Amortization of above and below Market Leases Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Tenant relationships Customer Relationships [Member] Unsecured Credit Facility Line of Credit [Member] Cumulative dividends in excess of earnings Retained Earnings (Accumulated Deficit) Summary of Equity Compensation Expense Share-Based Payment Arrangement, Cost by Plan [Table Text Block] Gain on the sales of rental property, net Gain (Loss) on Disposition of Property Plant Equipment Financial Instrument [Axis] Financial Instrument [Axis] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] 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] Executive Category: Executive Category [Axis] Covenant compliance Debt Instrument, Covenant Compliance Other expenses Other Operating Income (Expense), Net Total interest expense presented in the Consolidated Statements of Operations in which the effect of cash flow hedges are recorded Interest Expense, Operating and Nonoperating Current Fiscal Year End Date Current Fiscal Year End Date Class of Stock [Axis] Class of Stock [Axis] Expected term (years) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Noncontrolling Interest Property Partnerships Noncontrolling Interest in Joint Venture [Member] Noncontrolling Interest in Joint Venture Property Subject to or Available for Operating Lease [Line Items] Property, Plant, and Equipment, Lessor Asset under Operating Lease [Line Items] 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] Statement [Table] Statement [Table] Acquisitions of deferred leasing intangibles Noncash or Part Noncash Acquisition, Intangible Assets Acquired Real Estate Property, Ownership [Table] Real Estate Property, Ownership [Table] Interest rate swaps Derivative Liability Adjustments to reconcile net income to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Cash flows from financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Noncontrolling Interest Noncontrolling Interest Disclosure [Text Block] Schedule of financial instruments accounted for at fair value on a recurring basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] At The Market Program 2025 $750 Million At The Market Program 2025 $750 Million [Member] At The Market Program 2025 $750 Million Organization and Description of Business Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Interest Rate Swap Maturing January 2032 Interest Rate Swap Maturing January 2032 [Member] Interest Rate Swap Maturing January 2032 Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Denominator Weighted Average Number of Shares Outstanding, Diluted [Abstract] All Adjustments to Compensation All Adjustments to Compensation [Member] Amendment Flag Amendment Flag Proceeds from sales of rental property, net Proceeds from Sale, Real Estate, Held-for-Investment Leases Lessee, Operating Leases [Text Block] Termination Date Trading Arrangement Termination Date Performance period Share Based Compensation Arrangement, Performance Period Share Based Compensation Arrangement, Performance Period Net Cash Provided by (Used in) Financing Activities, Total Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Measure: Measure [Axis] Property Direct Costs of Leased and Rented Property or Equipment Receivable [Domain] Receivable [Domain] Change in loan fees, costs, and offering costs included in accounts payable, accrued expenses and other liabilities Debt Issuance Costs Incurred During Noncash or Partial Noncash Transaction, Net Debt Issuance Costs Incurred During Noncash or Partial Noncash Transaction, Net Operating Lease, Weighted Average Discount Rate, Percent Operating Lease, Weighted Average Discount Rate, Percent Deferred Rent Receivables, Net Deferred Rent Receivables, Net Number of days of average trailing stock price used to calculate number of shares of common stock granted Share-based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other Than Options, Trailing Average Common Stock Price, Period Share-based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other Than Options, Trailing Average Common Stock Price, Period Weighted average common shares outstanding — basic Weighted Average Number of Shares Outstanding, Basic Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] Disposal Group Classification [Domain] Disposal Group Classification [Domain] Schedule of computation of basic and diluted earnings per common share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Independent Director Director [Member] Building and land improvements, net of accumulated depreciation of $260,522 and $220,644, respectively Land, Buildings and Improvements [Member] Subsequent Events [Abstract] Subsequent Events [Abstract] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Risk-free interest rate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Amortization of deferred financing fees Amortization of Debt Issuance Costs Schedule of activity related to unvested restricted stock awards Schedule of Unvested Restricted Stock Units Roll Forward [Table Text Block] Other income (expense) Nonoperating Income (Expense) [Abstract] Entity Tax Identification Number Entity Tax Identification Number Expenses Costs and Expenses [Abstract] $300 Million Unsecured Term Loan G $300 Million Unsecured Term Loan G [Member] $300 Million Unsecured Term Loan G Asset Acquisition [Axis] Asset Acquisition [Axis] Property Subject to or Available for Operating Lease, by Major Property Class [Table] Property, Plant, and Equipment, Lessor Asset under Operating Lease [Table] Number of properties Number of buildings disposed Number of Real Estate Properties Limited Partner Limited Partner - Noncontrolling Interest [Member] Limited Partner - Noncontrolling Interest Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Common Stock, Par or Stated Value Per Share Common Stock, Par or Stated Value Per Share Common Stock, Shares, Issued Common Stock, Shares, Issued Operating Lease, Weighted Average Remaining Lease Term Operating Lease, Weighted Average Remaining Lease Term Dividends and distributions Payments of Dividends Interest expense Interest Expense, Nonoperating Trading Arrangement: Trading Arrangement [Axis] Total Shareholder Return Amount Total Shareholder Return Amount Rental income Operating Lease, Lease Income Subsequent Events Subsequent Events [Text Block] Insider Trading Arrangements [Line Items] Security Exchange Name Security Exchange Name Tenant improvements, net of accumulated depreciation of $50,567 and $43,997, respectively Tenant Improvements Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Leasehold Improvements Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Leasehold Improvements Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Leasehold Improvements Total cash and cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Discontinued Operation Total liabilities Liabilities Liabilities Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] $350 Million Unsecured Term Loan A $350 Million Unsecured Term Loan A [Member] $350 Million Unsecured Term Loan A STAG Industrial, Inc NC Venture STAG Industrial, Inc NC Venture [Member] STAG Industrial, Inc NC Venture Proceeds from sales of common stock, net Stock Issued During Period, Value, New Issues Statement Statement [Line Items] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Cleveland, OH Cleveland, Ohio 6-11-2026 [Member] Cleveland, Ohio 6-11-2026 Cash and cash equivalents Cash and Cash Equivalent Construction in progress Development in Process Common Stock Common Stock [Member] Vested (in shares) Vested (in units) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Dividends and Distributions, Net Dividends and Distributions, Net Dividends and Distributions, Net Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] Building and Improvements, accumulated depreciation Real Estate Investment Property, Accumulated Depreciation Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation