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Regulatory & Capital Matters (Details) - USD ($) | 1 Months Ended | 3 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2020 | Mar. 31, 2020 | Jan. 01, 2020 | Dec. 31, 2019
Regulatory & Capital Matters |  |  |  |
Tier 1 capital leverage ratio (as a percent) | 10.57% | 10.57% |  | 11.93%
Risk-based capital ratio (as a percent) | 13.09% | 13.09% |  | 14.53%
Payments of Dividends | $ 30,000,000 |  |  |
Phase out of impact of allowance for credit loss |  |  | $ 3,800,000 |
Allowance for credit loss Percentage annually |  | 25.00% |  |
Deferment of impact on rretained earnings | $ 5,200,000 | $ 5,200,000 |  |
Percentage of allowance for credit loss |  | 25.00% |  |
Change in allowance for credit loss |  | $ 8,000,000 |  |
Subsidiaries [Member] |  |  |  |
Regulatory & Capital Matters |  |  |  |
Tier 1 capital leverage ratio (as a percent) | 11.36% | 11.36% |  | 12.50%
Risk-based capital ratio (as a percent) | 14.07% | 14.07% |  | 15.23%
Tier One leverage ratio, basis point decrease (as a percent) |  | 1.14% |  |
Risk-based capital ratio, basis point decrease (as a percent) |  | $ 1.16 |  |
Minimum [Member] | Subsidiaries [Member] |  |  |  |
Regulatory & Capital Matters |  |  |  |
Tier 1 capital leverage ratio (as a percent) | 8.00% | 8.00% |  |
Risk-based capital ratio (as a percent) | 12.00% | 12.00% |  |
Tier 1 capital leverage ratio, board-designated threshold | 8.00% | 8.00% |  |
Total Capital Ratio, board-designated threshold (as a percent) | 12.00% | 12.00% |  |

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