Loans - Additional Information (Details)	9 Months Ended
	Sep. 30, 2022 USD ($) payment loan	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Paycheck protection program	$ 315,000		$ 25,800,000
Deferred loan costs	$ 2,600,000		1,900,000
Period of loan sold by mortgage company	30 days
Minimum period seldom held	90 days
Mortgage warehousing maximum pay off period	30 days
Nonaccrual interest income	$ 0	$ 0
Non–accrual	14,771,000		14,962,000
Non-performing TDRs	$ 1,700,000		1,500,000
Restructured loan returned to accruing status number of consecutive payments of loan | payment	6
Restructured loan reported in TDRs	$ 4,194,000		3,912,000
Specific reserves allocated to troubled debt restructuring	0
Minimum
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans with an aggregate credit exposure	$ 3,000,000
Loans classified as TDR after a period (in days)	90 days
Minimum | Good Pass
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of consecutive years of profit for good pass rating (in years)	3 years
Number of consecutive years of profit unaudited financial information for good pass rating (in years)	5 years
Number of years of satisfactory relationship with bank for good pass rating (in years)	5 years
Maximum
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans with an aggregate credit exposure	$ 6,000,000
Loans classified as TDR after a period (in days)	120 days
Maximum | Satisfactory Pass
Financing Receivable, Troubled Debt Restructuring [Line Items]
Minimum number of years of satisfactory repayment required for satisfactory pass rating (in years)	2 years
CARES Act
Financing Receivable, Troubled Debt Restructuring [Line Items]
Restructured loan reported in TDRs	$ 1,000		$ 10,900,000
Performing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Restructured loan reported in TDRs	$ 2,500,000
Number TDRs returned to accrual status | loan	2
Loans Purchased With Evidence of Credit Deterioration
Financing Receivable, Troubled Debt Restructuring [Line Items]
Non–accrual	$ 1,700,000
Non-performing TDRs	$ 157,000