Disclosures about Fair Value of Financial Instruments - Unobservable Inputs (Details) - Fair Value, Nonrecurring $ in Thousands	Sep. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent impaired loans	$ 36,378	$ 20,889
Foreclosed assets held-for-sale	2,349
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent impaired loans	36,378	$ 20,889
Foreclosed assets held-for-sale	$ 2,349
Level 3 | Marketability discount | Market comparable properties
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed assets held-for-sale, measurement input	0.10
Level 3 | Marketability discount | Market comparable properties | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent impaired loans, measurement input	0.10	0.10
Level 3 | Marketability discount | Market comparable properties | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent impaired loans, measurement input	0.15	0.15
Level 3 | Marketability discount | Market comparable properties | Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral-dependent impaired loans, measurement input	0.12	0.12