Mortgage Banking - Additional information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Mortgage Banking [Abstract]
Residential Mortgage Loans, Unpaid Balance	$ 2,940,000,000		$ 2,940,000,000		$ 2,940,000,000
Expenses (credit) relating to secondary market buy-back activity	$ 0	$ 0	$ 0	$ 43,000