Fair Value Measurements and Disclosure - Valuation Technique, Unobservable Input, and Qualitative Information (Details) $ in Thousands	Sep. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)
Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Real estate mortgage		$ 144
Nonrecurring | Other real estate owned
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Real estate mortgage	$ 5,018
Significant Unobservable Inputs (Level 3) | Recurring | Discounted cash flow | Market credit risk adjusted spreads | Weighted average | Junior Subordinated Debt
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted average inputs (percent)	0.0383	0.0446
Significant Unobservable Inputs (Level 3) | Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Real estate mortgage		$ 144
Significant Unobservable Inputs (Level 3) | Nonrecurring | Other real estate owned
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Real estate mortgage	$ 5,018
Significant Unobservable Inputs (Level 3) | Nonrecurring | Fair Value of Collateral Method for Collateral Dependent Loans | Real estate construction and development
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Real estate mortgage	3,332
Significant Unobservable Inputs (Level 3) | Nonrecurring | Fair Value of Collateral Method for Collateral Dependent Loans | Other real estate owned
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Real estate mortgage	$ 5,018
Significant Unobservable Inputs (Level 3) | Nonrecurring | Fair Value of Collateral Method for Collateral Dependent Loans | Adjustment Percentage | Real estate construction and development
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Real estate mortgage, adjustment percentage	0.0702
Significant Unobservable Inputs (Level 3) | Nonrecurring | Fair Value of Collateral Method for Collateral Dependent Loans | Adjustment Percentage | Other real estate owned
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Real estate mortgage, adjustment percentage	0.1369
Significant Unobservable Inputs (Level 3) | Nonrecurring | Fair Value of Collateral Method for Collateral Dependent Loans | Adjustment Percentage | Real estate mortgage
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Real estate mortgage		$ 144
Real estate mortgage, adjustment percentage		0.0600