Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash paid for interest	$ 161,001	$ 158,147	$ 104,938
Cash paid for income taxes, net	(2,059)	(5,513)	1,866
Non-cash investing activity:
Mortgage servicing rights resulting from mortgage loan sales	591,757	581,101	577,531
Mortgage servicing liabilities resulting from mortgage loan sales	7,601	17,229	14,991
Unsettled portion of MSR acquisitions	10,139	5,319
Non-cash financing activity:
Issuance of Class A common stock in settlement of director fees	330	338	313
PMT
Non-cash investing activity:
Transfer of Note receivable from PennyMac Mortgage Investment Trust to Financing receivable from PennyMac Mortgage Investment Trust			150,000
Non-cash financing activity:
Transfer of excess servicing spread pursuant to recapture agreement with PennyMac Mortgage Investment Trust	$ 2,688	$ 5,244	6,603
Unpaid distribution			$ 7,585