Financial Instruments with Off-Balance-Sheet Risk - Off-Balance-Sheet Risk (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Commitments to Extend Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair Value Disclosure Offbalance Sheet Risks Amount Asset	$ 449,045	$ 492,040
Standby Letters of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Fair Value Disclosure Offbalance Sheet Risks Amount Asset	$ 9,435	$ 8,619