Derivative Financial Instruments - Other Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Derivative assets:
Derivative asset, before netting	$ 190,460,000		$ 190,460,000		$ 398,672,000
Netting	(86,559,000)		(86,559,000)		(64,977,000)
Total derivative assets	103,901,000		103,901,000		333,695,000
Derivative liabilities:
Derivative liability, before netting	108,027,000		108,027,000		54,702,000
Netting	(65,325,000)		(65,325,000)		(32,096,000)
Net amounts of liabilities presented in the consolidated balance sheet	42,702,000		42,702,000		22,606,000
Activity for derivative contracts used to hedge the IRLCs and inventory of mortgage loans at notional value
Gains (losses) recognized on derivative financial instruments	(176,005,000)	$ 91,118,000	(393,865,000)	$ (351,033,000)
Net gains on loans held for sale at fair value | 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	296,290,000	(167,734,000)	997,069,000	294,804
Net loan servicing fees | 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	(176,005,000)	91,118,000	(393,865,000)	(351,033)
Margin Deposits
Derivative assets:
Collateral placed with (received from) derivative counterparties	21,234,000		21,234,000		32,881,000
Interest rate lock commitments
Derivative assets:
Total derivative assets	70,685,000		70,685,000		323,473,000
Interest rate lock commitments | Net gains on loans held for sale at fair value
Activity for derivative contracts used to hedge the IRLCs and inventory of mortgage loans at notional value
Gains (losses) recognized on derivative financial instruments	27,251,000	$ 5,670,000	(257,043,000)	$ (333,416)
Forward contracts | Purchases
Derivative Instruments
Notional amount	9,437,616,000		9,437,616,000		22,007,383,000
Derivative assets:
Derivative asset, before netting	61,855,000		61,855,000		20,485,000
Derivative liabilities:
Derivative liability, before netting	13,005,000		13,005,000		18,007,000
Activity for derivative contracts used to hedge the IRLCs and inventory of mortgage loans at notional value
Balance at beginning of period			22,007,383,000
Balance at end of period	9,437,616,000		9,437,616,000
Forward contracts | Sales
Derivative Instruments
Notional amount	14,556,614,000		14,556,614,000		34,429,676,000
Derivative assets:
Derivative asset, before netting	24,499,000		24,499,000		40,215,000
Derivative liabilities:
Derivative liability, before netting	89,488,000		89,488,000		35,415,000
Activity for derivative contracts used to hedge the IRLCs and inventory of mortgage loans at notional value
Balance at beginning of period			34,429,676,000
Balance at end of period	14,556,614,000		14,556,614,000
MBS put options
Derivative Instruments
Notional amount	2,600,000,000		2,600,000,000		9,550,000,000
Derivative assets:
Derivative asset, before netting	7,868,000		7,868,000		7,655,000
Activity for derivative contracts used to hedge the IRLCs and inventory of mortgage loans at notional value
Balance at beginning of period			9,550,000,000
Balance at end of period	2,600,000,000		2,600,000,000
Swaptions | Purchases
Derivative Instruments
Notional amount					5,375,000,000
Derivative assets:
Derivative asset, before netting					1,625,000
Activity for derivative contracts used to hedge the IRLCs and inventory of mortgage loans at notional value
Balance at beginning of period			5,375,000,000
Put options on Eurodollar futures | Purchases
Derivative Instruments
Notional amount	3,175,000,000		3,175,000,000		2,450,000,000
Derivative assets:
Derivative asset, before netting	11,844,000		11,844,000		3,141,000
Activity for derivative contracts used to hedge the IRLCs and inventory of mortgage loans at notional value
Balance at beginning of period			2,450,000,000
Balance at end of period	3,175,000,000		3,175,000,000
Call options on Eurodollar futures | Purchases
Derivative Instruments
Notional amount	2,405,000,000		2,405,000,000		1,250,000,000
Derivative assets:
Derivative asset, before netting	13,709,000		13,709,000		2,078,000
Activity for derivative contracts used to hedge the IRLCs and inventory of mortgage loans at notional value
Balance at beginning of period			1,250,000,000
Balance at end of period	2,405,000,000		2,405,000,000
Treasury future | Purchases
Derivative Instruments
Notional amount	2,861,700,000		2,861,700,000		1,544,800,000
Activity for derivative contracts used to hedge the IRLCs and inventory of mortgage loans at notional value
Balance at beginning of period			1,544,800,000
Balance at end of period	2,861,700,000		2,861,700,000
Treasury future | Sales
Derivative Instruments
Notional amount	3,886,900,000		3,886,900,000		1,925,000,000
Activity for derivative contracts used to hedge the IRLCs and inventory of mortgage loans at notional value
Balance at beginning of period			1,925,000,000
Balance at end of period	3,886,900,000		3,886,900,000
Interest rate swap futures | Purchases
Derivative Instruments
Notional amount					3,010,600,000
Activity for derivative contracts used to hedge the IRLCs and inventory of mortgage loans at notional value
Balance at beginning of period			3,010,600,000
Interest rate swap futures | Sales
Derivative Instruments
Notional amount					2,187,200,000
Activity for derivative contracts used to hedge the IRLCs and inventory of mortgage loans at notional value
Balance at beginning of period			2,187,200,000
Not designated as hedging instrument | Interest rate lock commitments
Derivative Instruments
Notional amount	7,665,657,000		7,665,657,000		14,111,795,000
Derivative assets:
Derivative asset, before netting	70,685,000		70,685,000		323,473,000
Derivative liabilities:
Derivative liability, before netting	5,534,000		5,534,000		$ 1,280,000
Activity for derivative contracts used to hedge the IRLCs and inventory of mortgage loans at notional value
Balance at beginning of period			14,111,795,000
Balance at end of period	$ 7,665,657,000		$ 7,665,657,000