Fair Value of Financial Instruments - Quantitative Information About Non-recurring Level 3 Fair Value of Financial Instruments (Details) $ in Thousands	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2018 USD ($)
Other Real Estate	$ 208	$ 208	$ 239	$ 239	$ 0
Fair Value, Measurements, Nonrecurring [Member]
Impaired loans	$ 1,430		1,081
Valuation, Market Approach [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Loss Severity [Member]
Impaired loans			$ 239
Impaired loans, measurement input	87.8
Other Real Estate, Measurement Input	0.0
Valuation, Market Approach [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Loss Severity [Member] | Minimum [Member]
Impaired loans, measurement input			0.5
Valuation, Market Approach [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Loss Severity [Member] | Maximum [Member]
Impaired loans, measurement input			12.5
Valuation, Market Approach [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Loss Severity [Member] | Weighted Average [Member]
Impaired loans, measurement input	87.8		6.5
Valuation, Market Approach [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Comparability Adjustment [Member]
Impaired loans	$ 170
Impaired loans, measurement input	0.0
Other Real Estate	$ 208
Other Real Estate, Measurement Input	6.5
Valuation, Market Approach [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Comparability Adjustment [Member] | Minimum [Member]
Other Real Estate, Measurement Input	0.5
Valuation, Market Approach [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Comparability Adjustment [Member] | Maximum [Member]
Other Real Estate, Measurement Input	12.5
Valuation, Market Approach [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Comparability Adjustment [Member] | Weighted Average [Member]
Impaired loans, measurement input	0.0
Valuation Technique, Discounted Cash Flow [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Discount Rate [Member]
Impaired loans	$ 818		$ 809
Impaired loans, measurement input	6.4		6.4
Valuation Technique, Discounted Cash Flow [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Discount Rate [Member] | Weighted Average [Member]
Impaired loans, measurement input	6.4		6.4
Valuation Technique, Discounted Cash Flow [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Loss Severity [Member]
Impaired loans, measurement input	0.200		0.200
Valuation Technique, Discounted Cash Flow [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Loss Severity [Member] | Weighted Average [Member]
Impaired loans, measurement input	0.200		0.200
Blended Income and Sales Approach [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Cap Rate [Member]
Impaired loans, measurement input			9.5
Blended Income and Sales Approach [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Cap Rate [Member] | Minimum [Member]
Impaired loans, measurement input	8.5
Blended Income and Sales Approach [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Cap Rate [Member] | Maximum [Member]
Impaired loans, measurement input	9.5
Blended Income and Sales Approach [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Cap Rate [Member] | Weighted Average [Member]
Impaired loans, measurement input	9.1		9.5
Blended Income and Sales Approach [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Loss Severity [Member]
Impaired loans, measurement input	15.0		15.0
Blended Income and Sales Approach [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Loss Severity [Member] | Weighted Average [Member]
Impaired loans, measurement input	15.0		15.0
Blended Income and Sales Approach [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Comparability Adjustment [Member]
Impaired loans			$ 272
Other Real Estate	$ 442
Blended Income and Sales Approach [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Comparability Adjustment [Member] | Minimum [Member]
Impaired loans, measurement input	(10.0)
Other Real Estate, Measurement Input			(0.100)
Blended Income and Sales Approach [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Comparability Adjustment [Member] | Maximum [Member]
Impaired loans, measurement input	20.0
Other Real Estate, Measurement Input			15.0
Blended Income and Sales Approach [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Comparability Adjustment [Member] | Weighted Average [Member]
Impaired loans, measurement input	5.4		2.5