Fair Value of Financial Instruments and Fair Value Measurements - Measured on a Nonrecurring Basis (Details) $ in Thousands	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Foreclosed assets, net	$ 968	$ 3,706
Nonrecurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Collateral dependent impaired loans	6,223	6,749
Foreclosed assets, net	$ 968	$ 3,706
Nonrecurring | Collateral dependent impaired loans | Level 3 | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Measurement input	0
Nonrecurring | Collateral dependent impaired loans | Level 3 | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Measurement input	0.75
Nonrecurring | Collateral dependent impaired loans | Level 3 | Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Measurement input	0.28
Nonrecurring | Foreclosed assets, net | Level 3 | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Measurement input	0.05
Nonrecurring | Foreclosed assets, net | Level 3 | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Measurement input	0.46
Nonrecurring | Foreclosed assets, net | Level 3 | Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Measurement input	0.23