Fair Value Measurements - Quantitative Information (Details) - Level 3	Dec. 31, 2019	Dec. 31, 2018
Discounted appraised value | Selling cost
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impaired loans	0.08	0.08
Other real estate owned	0.08	0.08
Discounted cash flow analysis | Market rate for borrower (discount rate) | Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impaired loans	0.0325	0.0325
Discounted cash flow analysis | Market rate for borrower (discount rate) | Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Impaired loans	0.098	0.098