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Regulatory Matters (Tables) | 12 Months Ended
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Dec. 31, 2018
Banking and Thrift [Abstract] |
Regulatory Capital Amounts and Ratios for Company and Bank | As of December 31, 2018 and 2017, the Company had $25.0 million of trust-preferred securities, which were included in Tier 1 capital for regulatory purposes, respectively. The following table summarizes regulatory capital amounts and ratios for the Company and the Bank as of December 31, 2018 and 2017.
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | To Be Well |
|  |  |  |  |  |  |  | For Capital |  |  | Capitalized under Prompt Corrective |
|  | Actual |  |  | Adequacy Purposes |  |  | Action Provisions |
|  | Amount |  |  | Ratio |  |  | Amount |  |  |  |  |  | Ratio |  |  | Amount |  |  |  |  |  | Ratio |
|  | (Dollars in thousands) |
As of December 31, 2018: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Capital (to Risk-Weighted Assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company |  | $ | 1,263,800 |  |  |  | 14.13 | % |  | $ | 715,283 |  |  |  | > |  |  |  | 8.00 | % |  |  |  |  |  |  |  |  |  |  | N/A |
Bank |  | $ | 1,253,219 |  |  |  | 14.03 | % |  | $ | 714,601 |  |  |  | > |  |  |  | 8.00 | % |  | $ | 893,251 |  |  |  | > |  |  |  | 10.00 | %
Tier 1 Capital (to Risk-Weighted Assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company |  | $ | 1,191,228 |  |  |  | 13.32 | % |  | $ | 536,462 |  |  |  | > |  |  |  | 6.00 | % |  |  |  |  |  |  |  |  |  |  | N/A |
Bank |  | $ | 1,180,647 |  |  |  | 13.22 | % |  | $ | 535,951 |  |  |  | > |  |  |  | 6.00 | % |  | $ | 714,601 |  |  |  | > |  |  |  | 8.00 | %
Common equity Tier 1 capital ratio |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company |  | $ | 1,166,228 |  |  |  | 13.04 | % |  | $ | 402,347 |  |  |  | > |  |  |  | 4.50 | % |  |  |  |  |  |  |  |  |  |  | N/A |
Bank |  | $ | 1,180,647 |  |  |  | 13.22 | % |  | $ | 401,963 |  |  |  | > |  |  |  | 4.50 | % |  | $ | 580,613 |  |  |  | > |  |  |  | 6.50 | %
Tier 1 Capital (to Average- Assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company |  | $ | 1,191,228 |  |  |  | 10.98 | % |  | $ | 433,834 |  |  |  | > |  |  |  | 4.00 | % |  |  |  |  |  |  |  |  |  |  | N/A |
Bank |  | $ | 1,180,647 |  |  |  | 10.90 | % |  | $ | 433,403 |  |  |  | > |  |  |  | 4.00 | % |  | $ | 541,754 |  |  |  | > |  |  |  | 5.00 | %
As of December 31, 2017: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Capital (to Risk-Weighted Assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company |  | $ | 1,039,060 |  |  |  | 18.01 | % |  | $ | 461,574 |  |  |  | > |  |  |  | 8.00 | % |  |  |  |  |  |  |  |  |  |  | N/A |
Bank |  | $ | 1,029,126 |  |  |  | 17.86 | % |  | $ | 461,037 |  |  |  | > |  |  |  | 8.00 | % |  | $ | 576,296 |  |  |  | > |  |  |  | 10.00 | %
Tier 1 Capital (to Risk-Weighted Assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company |  | $ | 973,169 |  |  |  | 16.87 | % |  | $ | 346,180 |  |  |  | > |  |  |  | 6.00 | % |  |  |  |  |  |  |  |  |  |  | N/A |
Bank |  | $ | 963,235 |  |  |  | 16.71 | % |  | $ | 345,778 |  |  |  | > |  |  |  | 6.00 | % |  | $ | 461,037 |  |  |  | > |  |  |  | 8.00 | %
Common equity Tier 1 capital ratio |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company |  | $ | 948,210 |  |  |  | 16.43 | % |  | $ | 259,635 |  |  |  | > |  |  |  | 4.50 | % |  |  |  |  |  |  |  |  |  |  | N/A |
Bank |  | $ | 963,235 |  |  |  | 16.71 | % |  | $ | 259,333 |  |  |  | > |  |  |  | 4.50 | % |  | $ | 374,592 |  |  |  | > |  |  |  | 6.50 | %
Tier 1 Capital (to Average- Assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company |  | $ | 973,169 |  |  |  | 11.88 | % |  | $ | 327,680 |  |  |  | > |  |  |  | 4.00 | % |  |  |  |  |  |  |  |  |  |  | N/A |
Bank |  | $ | 963,235 |  |  |  | 11.77 | % |  | $ | 327,397 |  |  |  | > |  |  |  | 4.00 | % |  | $ | 409,246 |  |  |  | > |  |  |  | 5.00 | %

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