Parent Company Information - Condensed Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
ASSETS
Cash	$ 1,328,536	$ 340,069	$ 532,716
Investment in subsidiaries	929	1,300
Receivable from PennyMac Mortgage Investment Trust	36,372	40,091
Total assets	16,822,584	18,776,612
LIABILITIES AND STOCKHOLDERS' EQUITY
Unsecured senior notes	1,779,920	1,776,219
Accounts payable and accrued expenses	262,358	359,413
Income taxes payable	1,002,744	685,262
Total liabilities	13,351,535	15,358,287
Total liabilities and stockholders' equity	16,822,584	18,776,612
PennyMac Financial Services, Inc. | Parent Company [Member]
ASSETS
Cash	45,496	9,276
Investment in subsidiaries	4,421,906	4,217,461
Receivable from PennyMac Mortgage Investment Trust	27	27
Due from subsidiaries	1,509,103	1,477,332
Total assets	5,976,532	5,704,096
LIABILITIES AND STOCKHOLDERS' EQUITY
Unsecured senior notes	1,779,920	1,776,219
Accounts payable and accrued expenses	26,356	28,135
Payables to subsidiaries	135	116
Income taxes payable	699,072	481,301
Total liabilities	2,505,483	2,285,771
Stockholders' equity	3,471,049	3,418,325
Total liabilities and stockholders' equity	$ 5,976,532	$ 5,704,096