Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Cash paid for interest			$ 184,087	$ 125,987
Cash paid (refunds received) for income taxes, net			260,723	5,761
Non-cash investing activity:
Mortgage servicing rights resulting from loan sales			753,795	545,839
Mortgage servicing liabilities resulting from loan sales			6,576	27,133
Operating right-of-use assets recognized	$ 1,721	$ 1,929	8,219	60,642
Non-cash financing activity:
Issuance of Excess servicing spread payable to PennyMac Mortgage Investment Trust pursuant to a recapture agreement			1,393	1,327
Issuance of common stock in settlement of director fees	$ 48	$ 48	$ 144	$ 184