Derivative Financial Instruments - Aggregate Fair Value and Notional Amount of Derivative Financial Instruments (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Derivative [Line Items]
Fair Value	$ 3,975,000	$ 23,150,000
Notional Amount	1,772,298,000	6,861,921,000
Derivative Liabilities
Derivative [Line Items]
Fair Value	(16,855,000)	(3,317,000)
Notional Amount	908,532,000	1,619,790,000
Derivative Assets
Derivative [Line Items]
Fair Value	20,830,000	26,467,000
Notional Amount	863,766,000	5,242,131,000
Interest rate agreements | Derivative Liabilities
Derivative [Line Items]
Fair Value	0	(1,251,000)
Notional Amount	0	283,100,000
Interest rate agreements | Derivative Assets
Derivative [Line Items]
Fair Value	14,625,000	611,000
Notional Amount	285,000,000	161,500,000
TBAs
Derivative [Line Items]
Notional Amount	1,070,000,000.00	3,310,000,000
TBAs | Derivative Liabilities
Derivative [Line Items]
Fair Value	(16,784,000)	(658,000)
Notional Amount	845,000,000	870,000,000
TBAs | Derivative Assets
Derivative [Line Items]
Fair Value	1,893,000	2,880,000
Notional Amount	220,000,000	2,440,000,000
Futures
Derivative [Line Items]
Notional Amount	411,000,000	72,000,000
Futures | Derivative Liabilities
Derivative [Line Items]
Fair Value	(57,000)	(905,000)
Notional Amount	60,000,000	62,500,000
Futures | Derivative Assets
Derivative [Line Items]
Fair Value	3,976,000	25,000
Notional Amount	350,600,000	9,000,000
Swaptions | Derivative Assets
Derivative [Line Items]
Fair Value	0	18,318,000
Notional Amount	0	1,660,000,000
Loan purchase and interest rate lock commitments | Derivative Liabilities
Derivative [Line Items]
Fair Value	(14,000)	(503,000)
Notional Amount	3,532,000	404,190,000
Loan purchase and interest rate lock commitments | Derivative Assets
Derivative [Line Items]
Fair Value	336,000	4,633,000
Notional Amount	$ 8,166,000	$ 971,631,000