Derivative Financial Instruments - Other Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Derivative assets:
Derivative asset, before netting	$ 232,293	$ 258,809
Netting	(119,217)	(79,730)
Total derivative assets	113,076	179,079
Derivative liabilities:
Derivative liability, before netting	102,881	101,866
Netting	(61,981)	(48,591)
Net amounts of liabilities presented in the consolidated balance sheet	40,900	53,275
Activity for derivative contracts used to hedge the IRLCs and inventory of mortgage loans at notional value
Gains (losses) recognized on derivative financial instruments	(832,483)	(236,778)	$ (631,484)
Interest rate lock commitments and loans held for sale
Activity for derivative contracts used to hedge the IRLCs and inventory of mortgage loans at notional value
Gains (losses) recognized on derivative financial instruments	251,305	46,941	1,326,964
Mortgage servicing rights
Activity for derivative contracts used to hedge the IRLCs and inventory of mortgage loans at notional value
Gains (losses) recognized on derivative financial instruments	(794,282)	(236,778)	(631,484)
Margin Deposits
Derivative assets:
Collateral placed with (received from) derivative counterparties	(57,236)	(31,139)
Interest rate lock commitments
Derivative assets:
Total derivative assets	56,946	90,313
Activity for derivative contracts used to hedge the IRLCs and inventory of mortgage loans at notional value
Gains (losses) recognized on derivative financial instruments	(56,028)	63,749	$ (296,349)
Forward contracts | Purchases
Derivative Instruments
Notional amount	12,760,764	15,863,667
Derivative assets:
Derivative asset, before netting	3,701	78,448
Derivative liabilities:
Derivative liability, before netting	66,646	5,141
Activity for derivative contracts used to hedge the IRLCs and inventory of mortgage loans at notional value
Balance at beginning of year	15,863,667
Balance at end of year	12,760,764	15,863,667
Forward contracts | Sales
Derivative Instruments
Notional amount	23,440,334	14,477,159
Derivative assets:
Derivative asset, before netting	152,526	6,151
Derivative liabilities:
Derivative liability, before netting	12,854	92,796
Activity for derivative contracts used to hedge the IRLCs and inventory of mortgage loans at notional value
Balance at beginning of year	14,477,159
Balance at end of year	23,440,334	14,477,159
MBS put options
Derivative Instruments
Notional amount	450,000	2,925,000
Derivative assets:
Derivative asset, before netting	3,278	413
Activity for derivative contracts used to hedge the IRLCs and inventory of mortgage loans at notional value
Balance at beginning of year	2,925,000
Balance at end of year	450,000	2,925,000
MBS call options
Derivative Instruments
Notional amount		1,000,000
Derivative assets:
Derivative asset, before netting		6,265
Activity for derivative contracts used to hedge the IRLCs and inventory of mortgage loans at notional value
Balance at beginning of year	1,000,000
Balance at end of year		1,000,000
Put options on Eurodollar futures | Purchases
Derivative Instruments
Notional amount	4,270,000	8,717,500
Derivative assets:
Derivative asset, before netting	12,592	11,043
Activity for derivative contracts used to hedge the IRLCs and inventory of mortgage loans at notional value
Balance at beginning of year	8,717,500
Balance at end of year	4,270,000	8,717,500
Call options on Eurodollar futures | Purchases
Derivative Instruments
Notional amount	7,600,000	4,250,000
Derivative assets:
Derivative asset, before netting	3,250	66,176
Derivative liabilities:
Derivative liability, before netting		3,209
Activity for derivative contracts used to hedge the IRLCs and inventory of mortgage loans at notional value
Balance at beginning of year	4,250,000
Balance at end of year	7,600,000	4,250,000
Treasury future | Purchases
Derivative Instruments
Notional amount	7,467,000	5,986,500
Activity for derivative contracts used to hedge the IRLCs and inventory of mortgage loans at notional value
Balance at beginning of year	5,986,500
Balance at end of year	7,467,000	5,986,500
Treasury future | Sales
Derivative Instruments
Notional amount	10,521,000	10,677,000
Activity for derivative contracts used to hedge the IRLCs and inventory of mortgage loans at notional value
Balance at beginning of year	10,677,000
Balance at end of year	10,521,000	10,677,000
Not designated as hedging instrument | Interest rate lock commitments
Derivative Instruments
Notional amount	7,801,677	6,349,628
Derivative assets:
Derivative asset, before netting	56,946	90,313
Derivative liabilities:
Derivative liability, before netting	23,381	720
Activity for derivative contracts used to hedge the IRLCs and inventory of mortgage loans at notional value
Balance at beginning of year	6,349,628
Balance at end of year	$ 7,801,677	$ 6,349,628