Fair Value - Assets and Liabilities Subject to Fair Value Adjustments (Impairment) on a Nonrecurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired collateral-dependent loans	$ 7,639	$ 11,959
OREO, Net (Credit) Provision During Period		(225)
Impaired collateral-dependent loans, Net (Credit) Provision During Period	(968)	3,693
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Impaired collateral-dependent loans	$ 7,639	$ 11,959