Commitments and Contingent Liabilities - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Percentage Of Commercial And industrial Loans to Total Loans
Cash Deposit FDIC Insurance Limit	$ 250,000		$ 250,000
Uninsured deposits at financial institutions	33,900		33,900		$ 8,700
Commitments for loans	573,700		573,700		491,100
Reserve for unfunded loan commitments	355,000		355,000		$ 305,000
Rent and equipment expense	$ 526,000	$ 615,000	1,100	$ 1,200
Outstanding unfunded commitments for loans fixed rate of interest amount			25,705
Outstanding unfunded commitments for loans fixed rate of interest amount			$ 548,000