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Stockholders' Equity (Tables) | 3 Months Ended
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Mar. 31, 2016
Equity [Abstract] |
Summary of Shares Repurchased Under Stock Purchase Program | The following table is a summary of the shares under the program:
|  | Three Months Ended March 31, |
|  | 2016 |  |  | 2015 |
Number of shares repurchased |  |  | 100,000 |  |  |  | — |
Average price of shares repurchased |  | $ | 55.23 |  |  |  | — |
Shares remaining to be repurchased |  |  | 66,276 |  |  |  | 194,723 |
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 March 31, 2016: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(to Risk Weighted Assets)- |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BancFirst Corporation |  | $ | 673,104 |  |  |  | 14.40% |  |  | $ | 373,849 |  |  |  | 8.00% |  |  | $ | 403,056 |  |  |  | 8.625% |  |  | N/A |  |  | N/A |
BancFirst |  |  | 616,209 |  |  |  | 13.20% |  |  |  | 373,346 |  |  |  | 8.00% |  |  |  | 402,513 |  |  |  | 8.625% |  |  | $ | 466,682 |  |  |  | 10.00% |
Common Equity Tier 1 Capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(to Risk Weighted Assets)- |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BancFirst Corporation |  | $ | 597,533 |  |  |  | 12.79% |  |  | $ | 210,290 |  |  |  | 4.50% |  |  | $ | 239,497 |  |  |  | 5.125% |  |  | N/A |  |  | N/A |
BancFirst |  |  | 551,638 |  |  |  | 11.82% |  |  |  | 210,007 |  |  |  | 4.50% |  |  |  | 239,174 |  |  |  | 5.125% |  |  | $ | 303,343 |  |  |  | 6.50% |
Tier 1 Capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(to Risk Weighted Assets)- |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BancFirst Corporation |  | $ | 628,533 |  |  |  | 13.45% |  |  | $ | 280,387 |  |  |  | 6.00% |  |  | $ | 309,594 |  |  |  | 6.625% |  |  | N/A |  |  | N/A |
BancFirst |  |  | 571,638 |  |  |  | 12.25% |  |  |  | 280,009 |  |  |  | 6.00% |  |  |  | 309,177 |  |  |  | 6.625% |  |  | $ | 373,346 |  |  |  | 8.00% |
Tier 1 Capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(to Total Assets)- |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BancFirst Corporation |  | $ | 628,533 |  |  |  | 9.51% |  |  | $ | 264,328 |  |  |  | 4.00% |  |  | N/A |  |  | N/A |  |  | N/A |  |  | N/A |
BancFirst |  |  | 571,638 |  |  |  | 8.68% |  |  |  | 263,405 |  |  |  | 4.00% |  |  | N/A |  |  | N/A |  |  | $ | 329,256 |  |  |  | 5.00% |

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