Fair Value - Assets and Liabilities Subject to Fair Value Adjustments (Impairment) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
OREO	$ 1,523	$ 1,723
Impaired collateral-dependent loans	2,323	1,925
OREO, Net Provision (Credit)	(200)	(231)
Impaired collateral-dependent loans, Net Provision (Credit)	(230)	(253)
Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
OREO	0	0
Impaired collateral-dependent loans	0	0
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
OREO	0	0
Impaired collateral-dependent loans	0	0
Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
OREO	1,523	1,723
Impaired collateral-dependent loans	$ 2,323	$ 1,925