Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash paid for interest	$ 188,346	$ 161,001	$ 158,147
Cash paid (refunds received) for income taxes, net	32,457	(2,059)	(5,513)
Non-cash investing activity:
Mortgage servicing rights resulting from loan sales	884,876	591,757	581,101
Mortgage servicing liabilities resulting from loan sales	37,988	7,601	17,229
Unsettled portion of MSR acquisitions		10,139	5,319
Operating right-of-use assets recognized	83,248
Non-cash financing activity:
Issuance of common stock in settlement of director fees	233	330	338
PMT
Non-cash financing activity:
Issuance of Excess servicing spread payable to PennyMac Mortgage Investment Trust pursuant to a recapture agreement	$ 1,757	$ 2,688	$ 5,244