Fair Value Measurements - Quantitative (Details) - Fair Value, Measurements, Nonrecurring - Level 3 - USD ($) $ in Thousands		Dec. 31, 2020	Dec. 31, 2019
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans (collateral dependent)		$ 18,733	$ 1,268
Impaired loans (collateral dependent) | Appraisal of collateral
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans (collateral dependent)	[1]	$ 18,733	$ 1,268
Appraisal adjustments | Impaired loans (collateral dependent) | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans, collateral dependent, unobservable input value or range		15.00%
Appraisal adjustments | Impaired loans (collateral dependent) | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impaired loans, collateral dependent, unobservable input value or range		50.00%

[1] )    Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expense