Transactions with Affiliates - Exchanged Private National Mortgage Acceptance Company, LLC Unitholders (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Transactions with Affiliates
Amount of tax benefits under the tax sharing agreement (as a percent)	85.00%
Repricing of payable to exchanged Private National Mortgage Acceptance Company, LLC unitholders under tax receivable agreement		$ (280)	$ (379)
Private National Mortgage Acceptance Company [Member]
Transactions with Affiliates
Payments to exchanged Private National Mortgage Acceptance Company, LLC unitholders under tax receivable agreement	$ 4,635	10,713
Repricing of payable to exchanged Private National Mortgage Acceptance Company, LLC unitholders under tax receivable agreement		(280)	(379)
Payable to exchanged PNMAC unitholders under tax receivable agreement	30,530	35,165	$ 46,158
Related Party Donor Advised Fund
Transactions with Affiliates
Charitable contributions	$ 5,800	$ 2,300