CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
ASSETS
Cash	$ 621,921	$ 238,482
Short-term investment at fair value	62,228	420,553
Principal-only stripped mortgage-backed securities at fair value pledged to creditors	774,021	825,865
Loans held for sale at fair value (includes $7,433,850 and $8,140,834 pledged to creditors)	7,490,473	8,217,468
Derivative assets from non-affiliates	200,303	113,076
Derivative assets from PennyMac Mortgage Investment Trust	1,779
Servicing advances, net (includes valuation allowance of $86,180 and $85,788; $261,752 and $357,939 pledged to creditors)	396,006	568,512
Mortgage servicing rights at fair value (includes $9,440,264 and $8,609,388 pledged to creditors)	9,653,942	8,744,528
Investment in PennyMac Mortgage Investment Trust at fair value	920	944
Receivable from PennyMac Mortgage Investment Trust	$ 40,165	$ 30,206
Other Receivable, after Allowance for Credit Loss, Related Party [Extensible Enumeration]	Affiliated Entity [Member]	Affiliated Entity [Member]
Loans eligible for repurchase	$ 5,416,967	$ 6,157,172
Other (includes $11,848 and $16,697 pledged to creditors)	742,395	770,081
Total assets	25,401,120	26,086,887
LIABILITIES
Assets sold under agreements to repurchase	7,130,423	8,685,207
Mortgage loan participation purchase and sale agreements	699,182	496,512
Notes payable secured by mortgage servicing assets	1,325,716	2,048,972
Unsecured senior notes	4,829,113	3,164,032
Derivative liabilities	17,179	40,900
Derivative liabilities to PennyMac Mortgage Investment Trust	7,097
Mortgage servicing liabilities at fair value	1,593	1,683
Accounts payable and accrued expenses	476,094	354,414
Payable to PennyMac Mortgage Investment Trust	$ 80,605	$ 122,317
Other Liability, Related Party [Extensible Enumeration]	Affiliated Entity [Member]	Affiliated Entity [Member]
Payable to exchanged Private National Mortgage Acceptance Company, LLC unitholders under tax receivable agreement	$ 24,806	$ 25,898
Income taxes payable	1,151,395	1,131,000
Liability for loans eligible for repurchase	5,416,967	6,157,172
Liability for losses under representations and warranties	33,064	29,129
Total liabilities	21,193,234	22,257,236
Commitments and contingencies - Note 18
STOCKHOLDERS' EQUITY
Common stock-authorized 200,000,000 shares of $0.0001 par value; issued and outstanding, 51,875,223 and 51,376,616 shares, respectively	5	5
Additional paid-in capital	86,680	56,072
Retained earnings	4,121,201	3,773,574
Total stockholders' equity	4,207,886	3,829,651
Total liabilities and stockholders' equity	$ 25,401,120	$ 26,086,887