Document and Entity Information Statement [Table] Statement [Line Items] Statement Document Type Document Quarterly Report Document Period End Date Document Transition Report Securities Act File Number Entity Registrant Name Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Address, Address Line One Entity Address, City or Town Entity Address, State or Province Entity Address, Postal Zip Code City Area Code Local Phone Number Title of 12(b) Security Trading Symbol Security Exchange Name Entity Current Reporting Status Entity Interactive Data Current Entity Filer Category Entity Small Business Entity Emerging Growth Company Entity Shell Company Entity Common Stock, Shares Outstanding Entity Central Index Key Current Fiscal Year End Date Document Fiscal Year Focus Document Fiscal Period Focus Amendment Flag CONSOLIDATED BALANCE SHEETS (UNAUDITED) Assets [Abstract] ASSETS Acquisition of: Cash Cash Short-Term Investments Short-term investment at fair value Amount of mortgage-backed asset securities measured at fair value pledged to creditors. Mortgage Backed Asset Securities At Fair Value Pledged to Creditors Balance at end of quarter Balance at beginning of quarter Principal-only stripped mortgage-backed securities at fair value pledged to creditors Fair Value Loan, Mortgage, Held-for-Sale, Fair Value Disclosure Loans held for sale Total fair value Loans held for sale at fair value (includes $9,799,780 and $8,983,503 pledged to creditors) Derivative Asset Derivative assets from non-affiliates Total derivative assets Net amounts of assets presented in the balance sheet Fair value to related party, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. Derivative Assets To Related Party Derivative assets from PennyMac Mortgage Investment Trust Advances made by a mortgage loan servicer to to meet contractual principal and interest remittance requirements for investors, pay property taxes and insurance premiums, legal expenses and other protective advances to maintain, repair and market real estate properties on behalf of investors. Servicing Advances Servicing advances, net Servicing advances, net (includes valuation allowance of $116,052 and $103,574; $394,107 and $406,825 pledged to creditors) Servicing Asset Carrying value Mortgage servicing rights, at fair value Mortgage servicing rights at fair value (includes $9,901,292 and $9,367,851 pledged to creditors) Investments in Affiliates, Subsidiaries, Associates, and Joint Ventures, Fair Value Disclosure Fair value of PennyMac Mortgage Investment Trust shares Investment in PennyMac Mortgage Investment Trust at fair value Investment in PennyMac Mortgage Investment Trust Other Receivables Receivable from PennyMac Mortgage Investment Trust Total due from affiliate Other Receivable, after Allowance for Credit Loss, Related Party [Extensible Enumeration] Represents the unpaid principal balance of mortgage loans eligible but not required to be repurchased from investors due to borrower delinquency. Loans Eligible For Repurchases Loans eligible for repurchase Other Assets Other (includes $15,241 and $10,393 pledged to creditors) Other assets Other assets Assets Total assets Segment assets at end of quarter Liabilities [Abstract] LIABILITIES Assets Sold under Agreements to Repurchase, Repurchase Liability Assets sold under agreements to repurchase Total loans sold under agreements to repurchase Participation certificates in mortgage loans that have been pooled with Fannie Mae, Freddie Mac or Ginnie Mae, are issued to a lender pending the securitization of the mortgage loans and sale of the resulting securities. Mortgage Loan Participation and Sale Agreement Mortgage loan participation purchase and sale agreements Mortgage loan participation and sale agreement secured by mortgage loan participation certificates Notes Payable Notes payable secured by mortgage servicing assets Notes payable Including the current and noncurrent portions, carrying value as of the balance sheet date of unsecured Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders. Unsecured Senior Notes Unsecured senior notes Derivative Liability Derivative liabilities to non-affiliates Net amounts of liabilities presented in the consolidated balance sheet Fair value to related party, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset. Derivative Liabilities To Related Party Derivative liabilities to PennyMac Mortgage Investment Trust Servicing Liability Fair value Mortgage servicing liabilities at fair value Mortgage servicing liabilities Accounts Payable and Accrued Liabilities Accounts payable and accrued expenses Other Liabilities Payable to PennyMac Mortgage Investment Trust Other Liabilities, Total Other Liability, Related Party [Extensible Enumeration] Represents the amount payable under a tax receivable agreement with PennyMac's former unitholders on the date of the Company's initial public offering that provides for the payment by the Company to PennyMac's exchanged unitholders in an amount equal to 85% of the amount of the benefits, if any, that the Company is deemed to realize as a result of (i) increases in tax basis resulting from such unitholders' exchanges and (ii) certain other tax benefits related to entering into the tax receivable agreement, including tax benefits attributable to payments under the tax receivable agreement. Payable under Tax Receivable Agreement Payable to exchanged Private National Mortgage Acceptance Company, LLC unitholders under tax receivable agreement Accrued Income Taxes Income taxes payable Represents the unpaid principal balance of mortgage loans eligible but not required to be repurchased from investors due to borrower delinquency. Liability for Loans Eligible for Repurchase Liability for loans eligible for repurchase The Company's estimate of the losses that it expects to incur in the future as a result of its breach of the representations and warranties that it provides to the purchasers and insurers of the mortgage loans it has sold. Representations and Warranties Liability Balance at end of quarter Balance at beginning of quarter Liability for losses under representations and warranties Liabilities Total liabilities Commitments and Contingencies Commitments and contingencies - Note 18 Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] STOCKHOLDERS' EQUITY Common Stock, Value, Issued Common stock-authorized 200,000,000 shares of $0.0001 par value; issued and outstanding, 51,923,059 and 52,061,346 shares, respectively Additional Paid in Capital, Common Stock Additional paid-in capital Retained Earnings (Accumulated Deficit) Retained earnings Equity, Including Portion Attributable to Noncontrolling Interest Balance Balance Total stockholders' equity Liabilities and Equity Total liabilities and stockholders' equity Pledged Status [Axis] Pledged Status [Domain] Asset Pledged as Collateral without Right [Member] Asset Pledged as Collateral without Right Assets, Pledging Purpose [Extensible Enumeration] Represents the valuation allowance related to servicing advances made by a mortgage loan servicer to meet contractual principal and interest remittance requirements for investors, pay property taxes and insurance premiums, legal expenses and other protective advances so as to maintain, repair and market real estate properties on behalf of investors. Servicing advances, net, valuation allowance Balance at end of quarter Balance at beginning of quarter Servicing advances, net, valuation allowance Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Par or Stated Value Per Share Common stock, par value (in dollars per share) Common Stock, Shares, Issued Common stock, shares issued Common Stock, Shares, Outstanding Common stock, shares outstanding CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) Counterparty Name [Axis] Counterparty Name [Domain] Represents Non-affiliate entities of the company. Non-affiliates Non-affiliates Represents information pertaining to other counterparties of the company. Others Others Related and Nonrelated Parties [Axis] Related and Nonrelated Parties [Domain] Related Party [Member] Related Party Nonrelated Party [Member] Nonrelated Party Revenues [Abstract] Revenues: Gain (Loss) on Sales of Loans, Net [Abstract] Net gains on loans held for sale at fair value: Gain (Loss) on Sales of Loans, Net Net gains on loans held for sale at fair value Net gains on loans held for sale at fair value Net gains on loans held for sale at fair value Fees charged to correspondent lenders and borrowers relating to the purchase or origination of mortgage loans. Loan Originations Fees Loan origination fees Represent fees for services the company performs on behalf of PMT in connection with the acquisition, packaging and sale of mortgage loans. Loan Fulfillment Fees Receivable from Affiliate Fulfillment fee revenue Fulfillment fees from PennyMac Mortgage Investment Trust Not available. Servicing Income [Abstract] Net loan servicing fees: Not available. Banking Fees And Commission Abstract Loan servicing fees: Amount of revenue from servicing real estate mortgages, and other financial assets held by others. Includes premiums received in lieu of regular servicing fee. Servicing Fee Owned servicing Servicing Asset at Fair Value, Period Increase (Decrease) Change in fair value of mortgage servicing rights and mortgage servicing liabilities Total change in fair value Derivative, Gain (Loss) on Derivative, Net Mortgage servicing rights hedging results Mortgage servicing rights hedging results Gains (losses) recognized on derivative financial instruments Represents the amortization, provisions for losses due to impairment, fair value changes, and hedging results relating to mortgage servicing rights and changes in fair value of excess servicing spread payable to PennyMac Mortgage Investment Trust. Mortgage Servicing Rights MSR Amortization Impairment Fair Value Change Change in fair value of mortgage servicing rights and mortgage-backed securities Amount of revenue from servicing real estate mortgages, and other financial assets held by others. Includes premiums received in lieu of regular servicing fee and fair value changes and hedging results relating to mortgage servicing rights and excess servicing spread payable to PMT. Servicing Fee Net Net loan servicing fees - owned servicing Amount of revenue from subservicing real estate mortgages, and other financial assets held by others. Includes premiums received in lieu of regular servicing fee. Subservicing Fee Subservicing fees Amount of revenue from subservicing and servicing real estate mortgages, and other financial assets held by others. Includes premiums received in lieu of regular servicing fee and fair value changes and hedging results relating to mortgage servicing rights and excess servicing spread payable to PMT. Subservicing And Servicing Fee Net Net loan servicing fees Net loan servicing fees Net Interest Expense Net interest expense: Net interest (expense) income : Interest Income, Operating Interest income Interest income Interest Expense, Operating Interest expense Interest expense Interest Income (Expense), Operating Net interest expense Revenues, comprised of base and incentive revenue derived from the management of joint ventures, managing third-party properties, or another entity's operations. Management Fee Revenue Management fees from PennyMac Mortgage Investment Trust Management fees Management fees Gains (Losses) on Sales of Other Real Estate Results of real estate acquired in settlement in loans Results of real estate acquired in settlement of loans Amount recorded in earnings for change in the fair value of the investment in and dividends received from the affiliates. Investments in and Advances to Affiliates Change in Fair Value of Investment in and Dividends Received Change in fair value of investment in and dividends received from PennyMac Mortgage Investment Trust Change in fair value of investment in and dividends received from PennyMac Mortgage Investment Trust Revenue from Contract with Customer, Excluding Assessed Tax Other Revenues, Net of Interest Expense Total net revenues Operating Expenses [Abstract] Expenses: Expenses Labor and Related Expense Compensation Loan Processing Fee Loan origination Communications and Information Technology Technology Total technology expenses Represents the amount of mortgage loan collection and liquidation expenses. Mortgage Loan Collection And Liquidation Expenses Servicing Marketing Expense Marketing and advertising Professional Fees Professional services Represents occupancy and equipment expense. Occupancy And Equipment Occupancy and equipment Total occupancy and equipment expenses Other Expenses Other Operating Expenses Total expenses Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income before provision for income taxes Income Tax Expense (Benefit) Provision for income taxes Net income Earnings Per Share Earnings per share Earnings Per Share, Basic Basic (in dollars per share) Basic earnings per share (in dollars per share) Earnings Per Share, Diluted Diluted (in dollars per share) Diluted earnings per share (in dollars per share) Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted average shares outstanding Weighted Average Number of Shares Outstanding, Basic Weighted average shares of common stock outstanding (in shares) Basic (in shares) Weighted Average Number of Shares Outstanding, Diluted Diluted (in shares) Weighted average diluted shares of common stock outstanding (in shares) CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED) Equity Components [Axis] Equity Component [Domain] Common Stock [Member] Common Stock Additional Paid-in Capital [Member] Additional paid-in capital Retained Earnings [Member] Retained earnings Increase (Decrease) in Stockholders' Equity [Roll Forward] CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED) Shares, Issued Balance (in shares) Balance (in shares) Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Stock-based compensation Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Stock-based compensation (in shares) Stock Issued During Period, Value, Issued for Services Issuance of common stock in settlement of directors' fees Stock Issued During Period, Shares, Issued for Services Issuance of common stock in settlement of director fees (in shares) Dividends, Common Stock Common stock dividend ($0.30 per share) Stock Repurchased and Retired During Period, Value Repurchase of common stock Cost of shares of common stock repurchased Stock Repurchased and Retired During Period, Shares Repurchase of common stock (in shares) Shares of common stock repurchased Common Stock, Dividends, Per Share, Declared Common Stock dividends (in dollars per share) CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) Net Cash Provided by (Used in) Operating Activities [Abstract] Cash flow from operating activities Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash (used in) provided by operating activities: Represents the non-cash gains/losses due to fair value changes relating to mortgage servicing rights, mortgage servicing liabilities and changes in fair value of excess servicing spread payable to PennyMac Mortgage Investment Trust. Non Cash Mortgage Servicing Rights M S R Amortization Impairment Fair Value Change Change in fair value of mortgage servicing rights and mortgage servicing liabilities The accrual amount of unearned discounts on mortgage-backed securities. Accrual of Unearned Discounts On Mortgage-backed Securities Accrual of unearned discounts on principal-only stripped mortgage-backed securities Represents capitalization of delinquent mortgage interest to mortgage loan balances pursuant to loan modifications. Capitalization Of Interest On Mortgage Loans Held For Sale At Fair Value Capitalization of interest on loans held for sale Amortization of Debt Issuance Costs and Discounts Amortization of debt issuance costs Amount recorded in earnings for change in the fair value of the investment in and dividends received from the affiliates. Investments in and Advances to Affiliates Change in Fair Value of Investment Change in fair value of investment in common shares of PennyMac Mortgage Investment Trust Share-Based Payment Arrangement, Noncash Expense Stock-based compensation expense Represents provision for losses on servicing advances anticipated to be uncollectable relating to mortgage loans serviced for others. Provision For Servicing Advance Losses Provision for servicing advance losses Depreciation, Depletion and Amortization Depreciation and amortization of furniture, fixtures, equipment and building improvements Depreciation and amortization Depreciation Capitalized Computer Software, Impairments Impairment of capitalized software Impairment of capitalized software Operating Lease, Right-of-Use Asset, Periodic Reduction Amortization of operating lease right-of-use assets The cash outflow used to purchase loans from nonaffiliates that are held with the intention to resell in the near future. Payments To Purchase Loans Held For Sale From Nonaffiliates Purchase of loans held for sale from non-affiliates Payment for Origination, Loan, Mortgage, Held-for-Sale Origination of loans held for sale The aggregate cash outflow used to purchase all loans that are held with the intention to resell in the near future from affiliates. Payments To Purchase Loans Held For Sale Affiliates Purchase of loans held for sale from PennyMac Mortgage Investment Trust Represents the payment made for purchase of loans from Agency-backed securities to be modified and resold into new securitizations or serviced through bankruptcy or foreclosure. Payments for Purchase of Modified Mortgage Loans Held for Sale from Agencies Purchase of loans from Ginnie Mae securities and early buyout investors The cash inflow resulting from the sale of loans classified as held-for-sale, including proceeds from loans sold through mortgage securitization to non-affiliates. Proceeds From Sale Of Loans Held For Sale Non Affiliates Sale to non-affiliates and principal payment of loans held for sale Proceeds from Sale, Loan, Held-for-Sale Sale of loans held for sale to PennyMac Mortgage Investment Trust Represents the cash outflow for payment for repurchase of loans subject to representations and warranties. Payment for Repurchase of Loans Subject to Representations and Warranties Repurchase of loans subject to representations and warranties Increase (decrease) in advances made by a mortgage loan servicer to meet contractual principal and interest remittance requirements for investors, pay property taxes and insurance premiums, legal expenses and other protective advances to maintain, repair and market real estate properties on behalf of investors. Increase (Decrease) in Servicing Advances (Increase) decrease in servicing advances Increase (Decrease) Due from Affiliates Increase in receivable from PennyMac Mortgage Investment Trust Proceeds from Sale of Real Estate Sale of real estate acquired in settlement of loans Increase (Decrease) in Other Operating Assets Increase in other assets Increase (Decrease) in Accounts Payable and Accrued Liabilities (Decrease) increase in accounts payable and accrued expenses Increase (Decrease) in Operating Lease Liability Decrease in operating lease liabilities Increase (Decrease) in Due to Affiliates Decrease in payable to PennyMac Mortgage Investment Trust Increase (Decrease) in Income Taxes Payable Increase in income taxes payable Net Cash Provided by (Used in) Operating Activities Net cash (used in) provided by operating activities Net Cash Provided by (Used in) Investing Activities [Abstract] Cash flow from investing activities Payments for (Proceeds from) Short-Term Investments Increase in short-term investment The amount of repayment of principal-only stripped mortgage-backed securities. Repayment of principal-only stripped mortgage-backed securities Repayment of principal-only stripped mortgage-backed securities Payments for (Proceeds from) Derivative Instrument, Investing Activities Net settlement of derivative financial instruments used for hedging of mortgage servicing rights The cash outflow from the adjustments to sale of servicing rights, which contractually entitle the servicer to receive fees and ancillary revenues for performing billing, collection, disbursement and recordkeeping services in connection with a mortgage portfolio. Rights may be obtained via (1) acquisition or assumption of a servicing obligation that does not relate to financial assets of the servicer or its consolidated affiliates; or (2) by originating mortgage loans and then (a) transferring the loans to a Variable Interest Entity (VIE) in a transaction that meets the necessary transfer and classification requirements, or (b) transferring the loans in a transaction that meets the requirements for sale accounting. Adjustment To Sales Of Mortgage Servicing Rights Adjustment to sales of mortgage servicing rights to non-affiliates The related party cash inflow from the sale of servicing rights, which contractually entitle the servicer to receive fees and ancillary revenues for performing billing, collection, disbursement and recordkeepingservices in connection with a mortgage portfolio. Rights may be obtained via (1) acquisition or assumption of a servicing obligation that does not relate to financial assets of the servicer or its consolidated affiliates; or (2) by originating mortgage loans and then (a) transferring the loans to a Variable Interest Entity (VIE) in a transaction that meets the necessary transfer and classification requirements, or (b) transferring the loans in a transaction that meets the requirements for sale accounting. Proceeds From Sale Of Mortgage Servicing Rights MSR Related Party Sale of mortgage servicing rights to PennyMac Mortgage Investment Trust Payments to Acquire Software Acquisition of capitalized software Capitalized software Payments to Acquire Property, Plant, and Equipment Purchase of furniture, fixtures, equipment and leasehold improvements The increase (decrease) during the reporting period in money or securities placed with a broker or counterparty as security for a trading or derivative position reported in investing activities. Increase Decrease In Margin Deposits Outstanding Investing Activities Increase in margin deposits Net Cash Provided by (Used in) Investing Activities Net cash (used in) provided by investing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Cash flow from financing activities Proceeds from sale of assets under agreements to repurchase. Sale Of Assets Under Agreements To Repurchase Sale of assets under agreements to repurchase Payments made during the period to repurchase assets sold under agreements to repurchase. Repurchase Of Assets Sold Under Agreements To Repurchase Repurchase of assets sold under agreements to repurchase Represents the cash inflow from issuance of mortgage loan participation borrowings. Issuance Of Mortgage Loan Participation Certificates Issuance of mortgage loan participation purchase and sale certificates Represents the cash outflow from repayment of mortgage loan participation certificates. Repayment Of Mortgage Loan Participation Certificates Repayment of mortgage loan participation purchase and sale certificates Proceeds from Notes Payable Issuance of notes payable secured by mortgage servicing assets Repayments of Notes Payable Repayment of notes payable secured by mortgage servicing assets Proceeds from Issuance of Unsecured Debt Issuance of unsecured senior notes Payments of Debt Issuance Costs Payment of debt issuance costs