Fair Value - Level 3 Input Roll Forward, Recurring Basis (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Changes in fair value included in income arising from:
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Servicing Asset at Fair Value, Period Increase (Decrease)	Servicing Asset at Fair Value, Period Increase (Decrease)
Recurring basis
Roll forward of assets measured using Level 3 inputs on a recurring basis
Balance at the beginning of the quarter	$ 9,212,146	$ 7,667,505
Purchases and issuances, net	1,566,428	1,006,131
Capitalization of interest and advances	10,632	11,226
Sales and repayments	(514,646)	(383,999)
Mortgage servicing rights resulting from loan sales	650,349	412,520
Changes in fair value included in income arising from:
Changes in instrument specific credit risk	1,986	17,142
Other factors	(277,927)	(17,706)
Total changes in fair value included in income	(275,941)	(564)
Transfers from Level 3 to Level 2	911,237	(561,829)
Transfers to loans held for sale	(222,279)	(131,580)
Balance at the end of the quarter	9,515,452	8,019,410
Changes in fair value recognized during the period relating to assets still held at the end of the quarter	(297,331)	60,193
Roll forward of liabilities measured using Level 3 inputs on a recurring basis
Balance at the beginning of the quarter	1,683	1,805
Changes in fair value included in income	(32)	(73)
Balance at the end of the quarter	1,651	1,732
Changes in fair value recognized during the period relating to liability still outstanding at the end of the quarter	(32)	(73)
Recurring basis | Mortgage loans held for sale
Roll forward of assets measured using Level 3 inputs on a recurring basis
Balance at the beginning of the quarter	434,053	478,564
Purchases and issuances, net	1,383,885	905,860
Capitalization of interest and advances	10,632	11,226
Sales and repayments	(514,646)	(383,999)
Changes in fair value included in income arising from:
Changes in instrument specific credit risk	1,986	17,142
Other factors	36,948	(572)
Total changes in fair value included in income	38,934	16,570
Transfers from Level 3 to Level 2	911,237	(561,829)
Balance at the end of the quarter	441,621	466,392
Changes in fair value recognized during the period relating to assets still held at the end of the quarter	23,715	19,043
Recurring basis | Interest rate lock commitments
Roll forward of assets measured using Level 3 inputs on a recurring basis
Balance at the beginning of the quarter	33,565	89,593
Purchases and issuances, net	182,543	100,271
Changes in fair value included in income arising from:
Other factors	116,113	11,524
Total changes in fair value included in income	116,113	11,524
Transfers to loans held for sale	(222,279)	(131,580)
Balance at the end of the quarter	109,942	69,808
Changes in fair value recognized during the period relating to assets still held at the end of the quarter	109,942	69,808
Recurring basis | Mortgage servicing rights
Roll forward of assets measured using Level 3 inputs on a recurring basis
Balance at the beginning of the quarter	8,744,528	7,099,348
Mortgage servicing rights resulting from loan sales	650,349	412,520
Changes in fair value included in income arising from:
Other factors	(430,988)	(28,658)
Total changes in fair value included in income	(430,988)	(28,658)
Balance at the end of the quarter	8,963,889	7,483,210
Changes in fair value recognized during the period relating to assets still held at the end of the quarter	$ (430,988)	$ (28,658)