Premises and Equipment - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) right_of_use_asset	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Property, Plant and Equipment [Line Items]
Financing leases, ROU assets	$ 1,513
Depreciation expense	$ 5,400	$ 5,000	$ 5,100
Land
Property, Plant and Equipment [Line Items]
Number of right of use assets | right_of_use_asset	1
Financing leases, ROU assets	$ 400
Buildings
Property, Plant and Equipment [Line Items]
Number of right of use assets | right_of_use_asset	2
Financing leases, ROU assets	$ 1,100