Allowance for Credit Losses and Credit Quality Information - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) security_loan	Dec. 31, 2020 USD ($) security_loan	Dec. 31, 2019 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income on impaired loans	$ 800	$ 800
Loan workout and other credit costs	663	6,899	$ 3,616
Troubled debt restructuring related reserves	$ 200	$ 100
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans in the process of foreclosure | security_loan	28	27
Total loans outstanding, residential loans	$ 2,500	$ 1,900
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans in the process of foreclosure | security_loan	9	23
Total loans outstanding, residential loans	$ 3,200	$ 12,800
Residential and Consumer Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan workout and other credit costs	$ 1,500	$ 3,200	$ 2,700
Impairment loans, charge off period	90 days