Loan Sales and Servicing Activities - Summary of Mortgage Servicing Portfolio (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Mortgage servicing portfolio
Loans held for sale	$ 5,111,719	$ 4,294,689
Total loans serviced	617,424,038	607,216,769
Delinquent loans:
30 days	11,547,765	12,906,445
60 days	3,109,830	3,716,280
90 days or more - Not in foreclosure	7,301,481	7,972,624
90 days or more - In foreclosure	804,643	778,977
90 days or more - Foreclosed	14,134	12,428
Total delinquent mortgage loans	22,777,853	25,386,754
Bankruptcy	1,798,976	1,709,811
Custodial funds managed by the Company	7,898,055	5,501,952
Servicing rights owned
Mortgage servicing portfolio
Loans held for sale	5,111,719	4,294,689
Total loans serviced	386,605,026	374,563,700
Delinquent loans:
30 days	9,940,684	11,097,929
60 days	2,738,951	3,316,494
90 days or more - Not in foreclosure	6,426,292	6,941,325
90 days or more - In foreclosure	692,930	686,359
90 days or more - Foreclosed	9,652	8,133
Total delinquent mortgage loans	19,808,509	22,050,240
Bankruptcy	1,583,758	1,523,218
Custodial funds managed by the Company	5,429,348	3,741,978
Contract servicing and subservicing
Mortgage servicing portfolio
Total loans serviced	230,819,012	232,653,069
Delinquent loans:
30 days	1,607,081	1,808,516
60 days	370,879	399,786
90 days or more - Not in foreclosure	875,189	1,031,299
90 days or more - In foreclosure	111,713	92,618
90 days or more - Foreclosed	4,482	4,295
Total delinquent mortgage loans	2,969,344	3,336,514
Bankruptcy	215,218	186,593
Custodial funds managed by the Company	2,468,707	1,759,974
Non affiliated entities
Mortgage servicing portfolio
Originated	364,441,567	352,790,614
Purchased	17,051,740	17,478,397
Total loans serviced, excluding loans held for sale	381,493,307	370,269,011
Non affiliated entities | Servicing rights owned
Mortgage servicing portfolio
Originated	364,441,567	352,790,614
Purchased	17,051,740	17,478,397
Total loans serviced, excluding loans held for sale	381,493,307	370,269,011
Affiliated entities
Mortgage servicing portfolio
Advised entities	230,819,012	232,653,069
Affiliated entities | Contract servicing and subservicing
Mortgage servicing portfolio
Advised entities	$ 230,819,012	$ 232,653,069