Loan Sales and Servicing Activities - Summary of Mortgage Servicing Portfolio (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Mortgage servicing portfolio
Loans held for sale	$ 9,430,766	$ 11,063,938
Total loans serviced	509,708,281	426,750,830
Delinquent loans:
30 days	6,312,600	6,119,914
60 days	1,795,509	2,741,683
90 days or more - Not in foreclosure	10,751,765	26,254,443
90 days or more - In foreclosure	873,287	784,898
90 days or more - Foreclosed	24,506	50,069
Total delinquent mortgage loans	19,757,667	35,951,007
Bankruptcy	1,395,635	1,851,597
Delinquent loans in COVID-19 related forbearance
30 days	635,741	2,079,755
60 days	646,524	1,738,772
90 days or more	3,370,792	18,594,557
Total delinquent loans in COVID-19 related forbearance	4,653,057	22,413,084
Custodial funds managed by the Company	12,308,608	16,747,242
Servicing rights owned
Mortgage servicing portfolio
Loans held for sale	9,430,766	11,063,938
Total loans serviced	287,816,139	252,332,239
Delinquent loans:
30 days	5,338,545	5,217,949
60 days	1,604,782	2,393,267
90 days or more - Not in foreclosure	9,001,137	21,781,226
90 days or more - In foreclosure	829,494	751,586
90 days or more - Foreclosed	8,017	12,938
Total delinquent mortgage loans	16,781,975	30,156,966
Bankruptcy	1,261,980	1,698,418
Delinquent loans in COVID-19 related forbearance
30 days	554,161	1,745,257
60 days	556,990	1,479,753
90 days or more	2,732,089	14,904,052
Total delinquent loans in COVID-19 related forbearance	3,843,240	18,129,062
Custodial funds managed by the Company	8,485,081	10,660,517
Contract servicing and subservicing
Mortgage servicing portfolio
Total loans serviced	221,892,142	174,418,591
Delinquent loans:
30 days	974,055	901,965
60 days	190,727	348,416
90 days or more - Not in foreclosure	1,750,628	4,473,217
90 days or more - In foreclosure	43,793	33,312
90 days or more - Foreclosed	16,489	37,131
Total delinquent mortgage loans	2,975,692	5,794,041
Bankruptcy	133,655	153,179
Delinquent loans in COVID-19 related forbearance
30 days	81,580	334,498
60 days	89,534	259,019
90 days or more	638,703	3,690,505
Total delinquent loans in COVID-19 related forbearance	809,817	4,284,022
Custodial funds managed by the Company	3,823,527	6,086,725
Non affiliated entities
Mortgage servicing portfolio
Originated	254,524,015	199,655,361
Purchased	23,861,358	41,612,940
Total loans serviced, excluding loans held for sale	278,385,373	241,268,301
Non affiliated entities | Servicing rights owned
Mortgage servicing portfolio
Originated	254,524,015	199,655,361
Purchased	23,861,358	41,612,940
Total loans serviced, excluding loans held for sale	278,385,373	241,268,301
Affiliated entities
Mortgage servicing portfolio
Advised entities	221,892,142	174,418,591
Affiliated entities | Contract servicing and subservicing
Mortgage servicing portfolio
Advised entities	$ 221,892,142	$ 174,418,591