Income Taxes - Deferred Tax Assets And Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2018
Deferred (benefit) expense:
Mortgage servicing rights	$ 326,378	$ 196,697	$ 128,471
Net operating loss	(160,605)		581
Reserves and losses	13,480	15,736	(33,477)
Compensation accruals	10,473	(11,456)	(647)
Additional tax basis in partnership from exchanges of partnership units into the Company's common stock	4,517	4,420	5,200
California franchise taxes	4,447	10,753	(15,200)
Tax credits		50
Other	(5,757)	(1,717)	1,318
Total provision for deferred income taxes	192,933	214,483	$ 86,246
Components of income taxes payable:
Income taxes currently (receivable)	(1,993)	(126,542)
Deferred income tax liabilities, net	1,004,737	811,804
Income taxes payable	1,002,744	685,262
Deferred income tax assets:
Net operating loss carryforward	161,682	1,077
Compensation accruals	42,668	53,141
Additional tax basis in partnership from exchanges of partnership units into the Company's common stock	25,760	30,277
Reserves and losses	33,795	47,275
California franchise tax		4,447
Other	6,159	5,661
Gross deferred income tax assets	270,064	141,878
Deferred income tax liabilities:
Mortgage servicing rights	1,260,181	933,803
Other	14,620	19,879
Gross deferred income tax liabilities	1,274,801	953,682
Deferred income tax liabilities, net	1,004,737	811,804
Net operating loss carryforward	160,600			$ 1,100
Net operating loss carryforward, no expiration date	126,100
Net operating loss carryforwards with most having no expiration or expiring 2042	35,600
Unrecognized tax benefits	0	0
Accrual of interest or penalties related to unrecognized tax benefits	$ 0	$ 0