Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Cash paid for interest			$ 125,987	$ 123,622
Cash paid for income taxes (refunds received), net			5,761	(1,541)
Non-cash investing activity:
Mortgage servicing rights resulting from loan sales			545,839	448,604
Mortgage servicing liabilities resulting from loan sales			27,133	5,548
Unsettled portion of MSR acquisitions				13,501
Operating right-of-use assets recognized	$ 1,929		60,642
Non-cash financing activity:
Issuance of Excess servicing spread payable to PennyMac Mortgage Investment Trust pursuant to a recapture agreement			1,327	1,983
Issuance of Class A common stock and common stock in settlement of director fees	$ 48	$ 85	$ 184	$ 245