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Stockholders' Equity (Tables) | 6 Months Ended
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Jun. 30, 2017
Equity [Abstract] |
Summary of Shares Repurchased Under Stock Purchase Program | The following table is a summary of the shares under the program, all share repurchased in 2016 where purchased in the first three months of the year:
|  | Six Months Ended June 30, |
|  | 2017 |  |  | 2016 |
Number of shares repurchased |  |  | — |  |  |  | 100,000 |
Average price of shares repurchased |  | $ | — |  |  | $ | 55.23 |
Shares remaining to be repurchased |  |  | 150,000 |  |  |  | 66,276 |
Required Capital Amounts and Company's Respective Ratios | The actual and required capital amounts and ratios are shown in the following table:
|  |  |  |  |  |  |  |  |  | Required |  |  |  |  |  | To Be Well |
|  |  |  |  |  |  |  |  |  | For Capital |  |  | With |  |  | Capitalized Under |
|  |  |  |  |  |  |  |  |  | Adequacy |  |  | Capital Conservation |  |  | Prompt Corrective |
|  | Actual |  |  | Purposes |  |  | Buffer |  |  | Action Provisions |
|  | Amount |  |  | Ratio |  |  | Amount |  |  | Ratio |  |  | Amount |  |  | Ratio |  |  | Amount |  |  | Ratio |
|  | (Dollars in thousands) |  |  |  |  |  |  |  |  |
As of June 30, 2017: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(to Risk Weighted Assets)- |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BancFirst Corporation |  | $ | 763,741 |  |  |  | 15.51% |  |  | $ | 394,051 |  |  |  | 8.00% |  |  | $ | 455,621 |  |  |  | 9.250% |  |  | N/A |  |  | N/A |
BancFirst |  |  | 685,395 |  |  |  | 13.93% |  |  |  | 393,644 |  |  |  | 8.00% |  |  |  | 455,151 |  |  |  | 9.250% |  |  | $ | 492,055 |  |  |  | 10.00% |
Common Equity Tier 1 Capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(to Risk Weighted Assets)- |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BancFirst Corporation |  | $ | 683,736 |  |  |  | 13.88% |  |  | $ | 221,653 |  |  |  | 4.50% |  |  | $ | 283,224 |  |  |  | 5.750% |  |  | N/A |  |  | N/A |
BancFirst |  |  | 616,390 |  |  |  | 12.53% |  |  |  | 221,425 |  |  |  | 4.50% |  |  |  | 282,932 |  |  |  | 5.750% |  |  | $ | 319,836 |  |  |  | 6.50% |
Tier 1 Capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(to Risk Weighted Assets)- |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BancFirst Corporation |  | $ | 714,736 |  |  |  | 14.51% |  |  | $ | 295,538 |  |  |  | 6.00% |  |  | $ | 357,108 |  |  |  | 7.250% |  |  | N/A |  |  | N/A |
BancFirst |  |  | 636,390 |  |  |  | 12.93% |  |  |  | 295,233 |  |  |  | 6.00% |  |  |  | 356,740 |  |  |  | 7.250% |  |  | $ | 393,644 |  |  |  | 8.00% |
Tier 1 Capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(to Total Assets)- |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BancFirst Corporation |  | $ | 714,736 |  |  |  | 10.15% |  |  | $ | 281,701 |  |  |  | 4.00% |  |  | N/A |  |  | N/A |  |  | N/A |  |  | N/A |
BancFirst |  |  | 636,390 |  |  |  | 9.05% |  |  |  | 281,404 |  |  |  | 4.00% |  |  | N/A |  |  | N/A |  |  | $ | 351,755 |  |  |  | 5.00% |

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