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Regulatory Matters (Tables) | 6 Months Ended
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Jun. 30, 2019
Banking and Thrift [Abstract] |
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations | The Company’s and the Bank’s levels and ratios are presented in the table below for the dates indicated:
| Actual |  | Required For Capital Adequacy Purposes |  | Minimum Capital Adequacy With Capital Conservation Buffer |  | Required To Be Well Capitalized Under Prompt Corrective Action Provisions
As of June 30, 2019 | Amount |  | Ratio |  | Amount |  | Ratio |  | Amount |  | Ratio |  | Amount |  | Ratio
| (Dollars in thousands)
Common equity Tier 1 capital (to risk weighted assets): |  |  |  |  |  |  |  |  |  |  |  |
Company | $ | 1,512,921 |  |  | 11.90 | % |  | $ | 572,206 |  |  | 4.50 | % |  | $ | 890,098 |  |  | 7.00 | % |  | N/A |  |  | N/A |
Bank | $ | 1,784,216 |  |  | 14.03 | % |  | $ | 572,138 |  |  | 4.50 | % |  | $ | 889,992 |  |  | 7.00 | % |  | $ | 826,421 |  |  | 6.50 | %
Total capital (to risk-weighted assets): |  |  |  |  |  |  |  |  |  |  |  |
Company | $ | 1,706,299 |  |  | 13.42 | % |  | $ | 1,017,255 |  |  | 8.00 | % |  | $ | 1,335,147 |  |  | 10.50 | % |  | N/A |  |  | N/A |
Bank | $ | 1,879,018 |  |  | 14.78 | % |  | $ | 1,017,134 |  |  | 8.00 | % |  | $ | 1,334,988 |  |  | 10.50 | % |  | $ | 1,271,417 |  |  | 10.00 | %
Tier 1 capital (to risk-weighted assets): |  |  |  |  |  |  |  |  |  |  |  |
Company | $ | 1,611,497 |  |  | 12.67 | % |  | $ | 762,941 |  |  | 6.00 | % |  | $ | 1,080,833 |  |  | 8.50 | % |  | N/A |  |  | N/A |
Bank | $ | 1,784,216 |  |  | 14.03 | % |  | $ | 762,850 |  |  | 6.00 | % |  | $ | 889,992 |  |  | 8.50 | % |  | $ | 1,017,134 |  |  | 8.00 | %
Tier 1 capital (to average assets): |  |  |  |  |  |  |  |  |  |  |  |
Company | $ | 1,611,497 |  |  | 10.94 | % |  | $ | 589,066 |  |  | 4.00 | % |  | N/A |  |  | N/A |  |  | N/A |  |  | N/A |
Bank | $ | 1,784,216 |  |  | 12.11 | % |  | $ | 589,225 |  |  | 4.00 | % |  | N/A |  |  | N/A |  |  | $ | 736,532 |  |  | 5.00 | %
| Actual |  | Required For Capital Adequacy Purposes |  | Minimum Capital Adequacy With Capital Conservation Buffer |  | Required To Be Well Capitalized Under Prompt Corrective Action Provisions
As of December 31, 2018 | Amount |  | Ratio |  | Amount |  | Ratio |  | Amount |  | Ratio |  | Amount |  | Ratio
| (Dollars in thousands)
Common equity Tier 1 capital (to risk weighted assets): |  |  |  |  |  |  |  |  |  |  |  |
Company | $ | 1,458,344 |  |  | 11.44 | % |  | $ | 573,723 |  |  | 4.50 | % |  | $ | 812,774 |  |  | 6.375 | % |  | N/A |  |  | N/A |
Bank | $ | 1,737,092 |  |  | 13.63 | % |  | $ | 573,669 |  |  | 4.50 | % |  | $ | 812,740 |  |  | 6.375 | % |  | $ | 828,677 |  |  | 6.50 | %
Total capital (to risk-weighted assets): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company | $ | 1,649,664 |  |  | 12.94 | % |  | $ | 1,019,952 |  |  | 8.00 | % |  | $ | 1,259,004 |  |  | 9.875 | % |  | N/A |  |  | N/A |
Bank | $ | 1,830,385 |  |  | 14.36 | % |  | $ | 1,019,910 |  |  | 8.00 | % |  | $ | 1,258,951 |  |  | 9.875 | % |  | $ | 1,274,887 |  |  | 10.00 | %
Tier 1 capital (to risk-weighted assets): |  |  |  |  |  |  |  |  |  |  |  |
Company | $ | 1,556,371 |  |  | 12.21 | % |  | $ | 764,964 |  |  | 6.00 | % |  | $ | 1,004,015 |  |  | 7.875 | % |  | N/A |  |  | N/A |
Bank | $ | 1,737,092 |  |  | 13.63 | % |  | $ | 764,932 |  |  | 6.00 | % |  | $ | 812,740 |  |  | 7.875 | % |  | $ | 1,019,910 |  |  | 8.00 | %
Tier 1 capital (to average assets): |  |  |  |  |  |  |  |  |  |  |  |
Company | $ | 1,556,371 |  |  | 10.55 | % |  | $ | 590,176 |  |  | 4.00 | % |  | N/A |  |  | N/A |  |  | N/A |  |  | N/A |
Bank | $ | 1,737,092 |  |  | 11.76 | % |  | $ | 590,639 |  |  | 4.00 | % |  | N/A |  |  | N/A |  |  | $ | 738,299 |  |  | 5.00 | %

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