Fair Value Measurements - Level 3 Measurement Inputs (Details) - Nonrecurring - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans	$ 17	$ 1,377
SBA property
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans	17	218
Commercial lines of credit
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans		904
SBA commercial term
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans		255
Significant Unobservable Inputs (Level 3)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans	17	1,377
Significant Unobservable Inputs (Level 3) | SBA property
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans	$ 17	218
Significant Unobservable Inputs (Level 3) | Commercial lines of credit
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans		904
Significant Unobservable Inputs (Level 3) | Commercial lines of credit | Sales comparison approach | Adjustment for differences between the comparable estate sales | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans, measurement input			5.00%
Significant Unobservable Inputs (Level 3) | Commercial lines of credit | Sales comparison approach | Adjustment for differences between the comparable estate sales | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans, measurement input			9.00%
Significant Unobservable Inputs (Level 3) | Commercial lines of credit | Sales comparison approach | Adjustment for differences between the comparable estate sales | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans, measurement input			7.60%
Significant Unobservable Inputs (Level 3) | SBA commercial term
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans		$ 255