Leases - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($)
Lease [Line Items]
Operating leases terms	5 years 4 months 24 days
Weighted average discount rate, percentage	2.57%
Operating lease, right-of-use asset	$ 3,500
Right-of-use asset, statement of financial position	us-gaap:OtherAssets
Lease liability, statement of financial position	us-gaap:OtherLiabilities
Operating Lease, Liability	$ 2,204
Operating Lease, Expense	540,000
Other assets
Lease [Line Items]
Operating lease, right-of-use asset	2,500
Other liabilities
Lease [Line Items]
Operating Lease, Liability	$ 2,500
Bank Branch And Office Space
Lease [Line Items]
Operating leases terms	7 years