Fair Value of Financial Instruments - Quantitative Information About Non-recurring Level 3 Fair Value of Financial Instruments (Details) $ in Thousands	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Other Real Estate	$ 0	$ 239	$ 0	$ 0
Fair Value, Measurements, Nonrecurring [Member]
Impaired loans	11,980	1,081
Valuation, Market Approach [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Loss Severity [Member]
Impaired loans	$ 10,690	$ 239
Valuation, Market Approach [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Loss Severity [Member] | Minimum [Member]
Impaired loans, measurement input	(100.0)	0.5
Valuation, Market Approach [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Loss Severity [Member] | Maximum [Member]
Impaired loans, measurement input	15.0	12.5
Valuation, Market Approach [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Loss Severity [Member] | Weighted Average [Member]
Impaired loans, measurement input	6.8	6.5
Valuation Technique, Discounted Cash Flow [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Discount Rate [Member]
Impaired loans	$ 1,290
Impaired loans, measurement input		6.4
Valuation Technique, Discounted Cash Flow [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Discount Rate [Member] | Minimum [Member]
Impaired loans, measurement input	4.3
Valuation Technique, Discounted Cash Flow [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Discount Rate [Member] | Maximum [Member]
Impaired loans, measurement input	5.5
Valuation Technique, Discounted Cash Flow [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Discount Rate [Member] | Weighted Average [Member]
Impaired loans, measurement input	4.9	6.4
Valuation Technique, Discounted Cash Flow [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Loss Severity [Member]
Impaired loans, measurement input		20.0
Valuation Technique, Discounted Cash Flow [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Loss Severity [Member] | Minimum [Member]
Impaired loans, measurement input	20.0
Valuation Technique, Discounted Cash Flow [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Loss Severity [Member] | Maximum [Member]
Impaired loans, measurement input	35.0
Valuation Technique, Discounted Cash Flow [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Loss Severity [Member] | Weighted Average [Member]
Impaired loans, measurement input	27.4	20.0
Valuation, Income Approach [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Discount Rate [Member]
Impaired loans		$ 809
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] | Weighted Average [Member]
Impaired loans, measurement input		9.5
Blended Income and Sales Approach [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Loss Severity [Member]
Impaired loans, measurement input		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
Blended Income and Sales Approach [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Comparability Adjustment [Member]
Impaired loans		$ 272
Blended Income and Sales Approach [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Comparability Adjustment [Member] | Minimum [Member]
Impaired loans, measurement input		(10.0)
Blended Income and Sales Approach [Member] | Fair Value, Measurements, Nonrecurring [Member] | Measurement Input, Comparability Adjustment [Member] | Maximum [Member]
Impaired loans, 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		3