Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Cash paid for interest			$ 208,015	$ 127,806
Cash paid for income taxes, net			257,074	3,871
Non-cash investing activity:
Mortgage servicing rights resulting from loan sales			953,895	507,849
Unsettled portion of MSR acquisitions				1,053
Operating right-of-use assets recognized	$ 4,570	$ 4,964	7,813	6,498
Mortgage servicing liabilities resulting from loan sales			64,383	6,576
Non-cash financing activity:
Issuance of Excess servicing spread payable to PennyMac Mortgage Investment Trust pursuant to a recapture agreement			557	862
Issuance of common stock in settlement of director fees	$ 50		$ 101	$ 96