Mortgage Servicing Rights - Summary of Mortgage Servicing Rights Activity (Details) - MSR - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Servicing Asset at Fair Value, Amount [Roll Forward]
Fair value, beginning of period	$ 3,314,952	$ 1,760,304
Capitalization of MSRs	2,213,572	2,397,483
MSR sales	(1,387,180)	(269,925)
Due to changes in valuation inputs or assumptions	868,803	286,348
Due to collection/realization of cash flows/other	(556,886)	(859,258)
Fair value, end of period	4,453,261	3,314,952	$ 1,760,304
Changes in fair value:
Due to changes in valuation inputs and assumptions	868,803	286,348
Due to collection/realization of cash flows and other	(556,886)	(859,258)
Net reserves and transaction costs on sales of servicing rights	(27,813)	(14,903)
Changes in fair value of mortgage servicing rights	$ 284,104	$ (587,813)
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Balance, beginning of period			1,756,864	$ 731,353
Additions			1,896,638
Amortization			(252,421)
Loans paid in full			(301,113)
Sales			(298,009)
Recovery/(Impairment)			(19,584)
Balance, end of period			$ 1,756,864