Securities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Debt Securities, Trading, and Equity Securities, FV-NI, Total	$ 0	$ 0
Securities held-to-maturity, amortized cost	58,730,000
Accrued interest receivable on held-to-maturity securities	100,000	100,000
Allowance for credit loss	0
Accrued interest receivable on available-for-sale debt securities	1,500,000	1,300,000
Mortgage Backed Securities Available for Sale Amortized Cost	340,800,000	308,100,000	$ 128,000,000.0
Proceeds from Sale of Debt Securities, Available-for-sale	45,000,000.0	221,000,000.0	$ 26,400,000
Non-qualified Deferred Compensation Plan [Member] | Other Assets [Member]
Deferred Compensation Plan, Amounts Held in Rabbi Trust	26,300,000	22,600,000
Collateralized Mortgage Obligations by Commercial Real Estate [Member]
Allowance for credit loss	$ 0	$ 0