Fair Value - Level 3 Input Roll Forward, Recurring Basis (Details) - Recurring basis - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Roll forward of assets measured using Level 3 inputs on a recurring basis
Balance at the beginning of the quarter	$ 9,515,452	$ 8,019,410	$ 9,212,146	$ 7,667,505
Purchases and issuances, net	1,686,029	1,082,322	3,252,457	2,088,453
Capitalization of interest and advances	27,315	14,110	37,947	25,336
Sales and repayments	(537,122)	(356,988)	(1,051,768)	(740,987)
Mortgage servicing rights resulting from loan sales	814,538	541,207	1,464,887	953,727
Changes in fair value included in income arising from:
Changes in instrument specific credit risk	38,010	28,011	67,629	45,153
Other factors	(174,777)	(82,333)	(480,337)	(100,039)
Total changes in fair value included in income	(136,767)	(54,322)	(412,708)	(54,886)
Transfers from Level 3 to Level 2	976,806	(704,994)	(1,888,043)	(1,266,823)
Transfers to loans held for sale	(208,324)	(148,839)	(430,603)	(280,419)
Balance at the end of the quarter	10,184,315	8,391,906	10,184,315	8,391,906
Changes in fair value recognized during the period relating to assets still held at the end of the quarter	$ (79,531)	$ (10,903)	$ (507,322)	$ (40,328)
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)	Servicing Asset at Fair Value, Period Increase (Decrease)	Servicing Asset at Fair Value, Period Increase (Decrease)
Roll forward of liabilities measured using Level 3 inputs on a recurring basis
Balance at the beginning of the quarter	$ 1,651	$ 1,732	$ 1,683	$ 1,805
Changes in fair value included in income	(8)	(24)	(40)	(97)
Balance at the end of the quarter	1,643	1,708	1,643	1,708
Changes in fair value recognized during the period relating to liability still outstanding at the end of the quarter	(8)	(24)	(40)	(97)
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	441,621	466,392	434,053	478,564
Purchases and issuances, net	1,513,042	954,081	2,896,927	1,859,941
Capitalization of interest and advances	27,315	14,110	37,947	25,336
Sales and repayments	(537,122)	(356,988)	(1,051,768)	(740,987)
Changes in fair value included in income arising from:
Changes in instrument specific credit risk	38,010	28,011	67,629	45,153
Other factors	4,853	(536)	14,168	(1,108)
Total changes in fair value included in income	42,863	27,475	81,797	44,045
Transfers from Level 3 to Level 2	976,806	(704,994)	(1,888,043)	(1,266,823)
Balance at the end of the quarter	510,913	400,076	510,913	400,076
Changes in fair value recognized during the period relating to assets still held at the end of the quarter	25,494	21,684	28,691	20,917
Interest rate lock commitments
Roll forward of assets measured using Level 3 inputs on a recurring basis
Balance at the beginning of the quarter	109,942	69,808	33,565	89,593
Purchases and issuances, net	172,987	128,241	355,530	228,512
Changes in fair value included in income arising from:
Other factors	67,548	19,542	183,661	31,066
Total changes in fair value included in income	67,548	19,542	183,661	31,066
Transfers to loans held for sale	(208,324)	(148,839)	(430,603)	(280,419)
Balance at the end of the quarter	142,153	68,752	142,153	68,752
Changes in fair value recognized during the period relating to assets still held at the end of the quarter	142,153	68,752	142,153	68,752
Mortgage servicing rights
Roll forward of assets measured using Level 3 inputs on a recurring basis
Balance at the beginning of the quarter	8,963,889	7,483,210	8,744,528	7,099,348
Mortgage servicing rights resulting from loan sales	814,538	541,207	1,464,887	953,727
Changes in fair value included in income arising from:
Other factors	(247,178)	(101,339)	(678,166)	(129,997)
Total changes in fair value included in income	(247,178)	(101,339)	(678,166)	(129,997)
Balance at the end of the quarter	9,531,249	7,923,078	9,531,249	7,923,078
Changes in fair value recognized during the period relating to assets still held at the end of the quarter	$ (247,178)	$ (101,339)	$ (678,166)	$ (129,997)