Regulatory Matters - Schedule of Minimum Capital Ratios Plus the Applicable Increment of the Capital Conservation (Details) |
Dec. 31, 2017 |
|---|---|
| Regulatory Capital Requirements [Abstract] | |
| CET-1 to risk-weighted assets | 5.75% |
| Tier 1 capital (i.e., CET-1 plus Additional Tier 1) to risk-weighted assets | 7.25% |
| Total capital (i.e., Tier 1 plus Tier 2) to risk-weighted assets | 9.25% |
| CET-1 to risk-weighted assets | 7.00% |
| Tier 1 capital (i.e., CET-1 plus Additional Tier 1) to risk-weighted assets | 8.50% |
| Total capital (i.e., Tier 1 plus Tier 2) to risk-weighted assets | 10.50% |