Derivatives, Hedging Activities and Financial Instruments with Off-Balance Sheet Risk - Commitments (Details) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Company's contractual commitments due to letters of credit
Total letters of credit	$ 35,414,000	$ 35,414,000	$ 33,288,000
Allowance for Credit Loss on Unfunded Commitments	3,400,000	3,400,000
Allowance for Credit Loss Unfunded Commitment, Purchase Accounting Adjustment	1,300,000	1,300,000
Decrease In Allowance for Credit Loss on unfunded Commitments	1,000,000.0
Commercial unfunded commitments assumptions for decrease in the allowance for credit losses		780,000
Accretion of interest income for decrease in the allowance for credit losses		223,000
Fixed [Member]
Company's contractual commitments due to letters of credit
Total letters of credit	13,589,000	13,589,000	840,000
Variable [Member]
Company's contractual commitments due to letters of credit
Total letters of credit	21,825,000	21,825,000	32,448,000
Commitments to Extend Credit to Borrowers [Member]
Company's contractual commitments due to letters of credit
Total letters of credit	35,347,000	35,347,000	33,221,000
Commitments to Extend Credit to Borrowers [Member] | Fixed [Member]
Company's contractual commitments due to letters of credit
Total letters of credit	13,589,000	13,589,000	840,000
Commitments to Extend Credit to Borrowers [Member] | Variable [Member]
Company's contractual commitments due to letters of credit
Total letters of credit	21,758,000	21,758,000	32,381,000
Commitments to Extend Credit to Borrowers [Member] | Financial Standby Letter of Credit [Member]
Company's contractual commitments due to letters of credit
Total letters of credit	19,649,000	19,649,000	17,858,000
Commitments to Extend Credit to Borrowers [Member] | Financial Standby Letter of Credit [Member] | Fixed [Member]
Company's contractual commitments due to letters of credit
Total letters of credit	5,504,000	5,504,000	384,000
Commitments to Extend Credit to Borrowers [Member] | Financial Standby Letter of Credit [Member] | Variable [Member]
Company's contractual commitments due to letters of credit
Total letters of credit	14,145,000	14,145,000	17,474,000
Commitments to Extend Credit to Borrowers [Member] | Performance Guarantee [Member]
Company's contractual commitments due to letters of credit
Total letters of credit	15,698,000	15,698,000	15,363,000
Commitments to Extend Credit to Borrowers [Member] | Performance Guarantee [Member] | Fixed [Member]
Company's contractual commitments due to letters of credit
Total letters of credit	8,085,000	8,085,000	456,000
Commitments to Extend Credit to Borrowers [Member] | Performance Guarantee [Member] | Variable [Member]
Company's contractual commitments due to letters of credit
Total letters of credit	7,613,000	7,613,000	14,907,000
Commitments to Extend Credit Nonborrowers [Member] | Performance Guarantee [Member]
Company's contractual commitments due to letters of credit
Total letters of credit	67,000	67,000	67,000
Commitments to Extend Credit Nonborrowers [Member] | Performance Guarantee [Member] | Variable [Member]
Company's contractual commitments due to letters of credit
Total letters of credit	67,000	67,000	67,000
Letter of Credit [Member] | Unused lines of Credit [Member]
Company's contractual commitments due to letters of credit
Loan commitments	850,298,000	850,298,000	979,890,000
Letter of Credit [Member] | Unused lines of Credit [Member] | Fixed [Member]
Company's contractual commitments due to letters of credit
Loan commitments	148,591,000	148,591,000	84,225,000
Letter of Credit [Member] | Unused lines of Credit [Member] | Variable [Member]
Company's contractual commitments due to letters of credit
Loan commitments	$ 701,707,000	$ 701,707,000	$ 895,665,000