Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Significant Unobservable Inputs Used in Recurring and Non-Recurring Fair Value Measurements (Details)

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Fair Value Measurements - Significant Unobservable Inputs Used in Recurring and Non-Recurring Fair Value Measurements (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Other real estate owned $ 188 $ 133  
SBA servicing asset 2,244 2,953 $ 3,355
Level 3      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
SBA servicing asset 2,244 2,953  
Level 3 | Fair Value Measurements on Non-Recurring Basis      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Impaired loans 3,059 4,948  
Other real estate owned $ 188 $ 133  
Level 3 | Fair Value Measurements on Non-Recurring Basis | Weighted Average | Collateral Discounts      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Range/Weighted Average 77.23% 34.10%  
Level 3 | Fair Value Measurements on Non-Recurring Basis | Weighted Average | Collateral Discounts and Estimated Cost to Sell      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Range/Weighted Average 10.00% 10.00%  
Level 3 | Fair Value Measurements on Non-Recurring Basis | Minimum | Collateral Discounts      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Range/Weighted Average 0.00% 0.00%  
Level 3 | Fair Value Measurements on Non-Recurring Basis | Maximum | Collateral Discounts      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Range/Weighted Average 100.00% 100.00%  
Level 3 | Fair Value Measurements on Non-Recurring Basis | Third Party Appraisals      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Impaired loans $ 3,059 $ 4,948  
Other real estate owned $ 188 $ 133  
Level 3 | Fair Value Measurements on Recurring Basis | Weighted Average | Conditional Prepayment Rate      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Range/Weighted Average 13.70% 12.50%  
Level 3 | Fair Value Measurements on Recurring Basis | Weighted Average | Discount Rate      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Range/Weighted Average 10.00% 10.00%  
Level 3 | Fair Value Measurements on Recurring Basis | Discounted Cash Flows      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
SBA servicing asset $ 2,244 $ 2,953