Warehouse Facilities Collateralized by U.S. Government Sponsored Enterprises (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Securities Financing Transaction
Warehouse facilities collateralized by U.S. Government Sponsored Enterprises	$ 137,406,000	$ 1,050,693,000
Outstanding draws	137,406,000	1,050,693,000
Committed Lines
Securities Financing Transaction
Lines available	1,550,000,000
Uncommitted Lines
Securities Financing Transaction
Lines available	800,000,000
Warehouse facility due June 14, 2023 Number 1
Securities Financing Transaction
Warehouse facilities collateralized by U.S. Government Sponsored Enterprises	0	243,659,000
Outstanding draws	$ 0	243,659,000
Warehouse facility due June 14, 2023 Number 1 | LIBOR
Securities Financing Transaction
Basis spread on variable rate	1.30%
Warehouse facility due June 14, 2023 Number 1 | Committed Lines
Securities Financing Transaction
Lines available	$ 450,000,000
Warehouse facility due June 14, 2023 Number 2
Securities Financing Transaction
Warehouse facilities collateralized by U.S. Government Sponsored Enterprises	0	135,601,000
Outstanding draws	$ 0	135,601,000
Warehouse facility due June 14, 2023 Number 2 | LIBOR
Securities Financing Transaction
Basis spread on variable rate	1.30%
Warehouse facility due June 14, 2023 Number 2 | Uncommitted Lines
Securities Financing Transaction
Lines available	$ 300,000,000
Warehouse facility due September 25, 2023 Number 1
Securities Financing Transaction
Warehouse facilities collateralized by U.S. Government Sponsored Enterprises	35,292,000	193,091,000
Outstanding draws	$ 35,292,000	193,091,000
Warehouse facility due September 25, 2023 Number 1 | LIBOR
Securities Financing Transaction
Basis spread on variable rate	1.30%
Warehouse facility due September 25, 2023 Number 1 | Committed Lines
Securities Financing Transaction
Lines available	$ 300,000,000
Warehouse facility due September 25, 2023 Number 2
Securities Financing Transaction
Warehouse facilities collateralized by U.S. Government Sponsored Enterprises	0	0
Outstanding draws	$ 0	0
Warehouse facility due September 25, 2023 Number 2 | LIBOR
Securities Financing Transaction
Basis spread on variable rate	1.30%
Warehouse facility due September 25, 2023 Number 2 | Uncommitted Lines
Securities Financing Transaction
Lines available	$ 100,000,000
Warehouse facility due October 7, 2022
Securities Financing Transaction
Warehouse facilities collateralized by U.S. Government Sponsored Enterprises	102,114,000	384,571,000
Outstanding draws	$ 102,114,000	384,571,000
Warehouse facility due October 7, 2022 | LIBOR
Securities Financing Transaction
Basis spread on variable rate	1.30%
Warehouse facility due October 7, 2022 | Committed Lines
Securities Financing Transaction
Lines available	$ 800,000,000
Warehouse facility due October 7, 2022 | Committed Lines | SOFR
Securities Financing Transaction
Basis spread on variable rate	1.80%
Warehouse facility due October 7, 2022 | Sublimit Lines
Securities Financing Transaction
Lines available	$ 125,000,000
Warehouse facilities collateralized by U.S. Government Sponsored Enterprises	0
Outstanding draws	0
Fannie Mae repurchase agreement, open maturity
Securities Financing Transaction
Warehouse facilities collateralized by U.S. Government Sponsored Enterprises	0	93,771,000
Outstanding draws	$ 0	$ 93,771,000
Fannie Mae repurchase agreement, open maturity | LIBOR
Securities Financing Transaction
Basis spread on variable rate	1.15%
Fannie Mae repurchase agreement, open maturity | Uncommitted Lines
Securities Financing Transaction
Lines available	$ 400,000,000