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Stockholders' Equity (Tables) | 9 Months Ended
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Sep. 30, 2015
Equity [Abstract] |
Summary of Shares Repurchased Under Stock Purchase Program | The following table is a summary of the shares under the program:
|  | Nine Months Ended September 30, |
|  | 2015 |  |  | 2014 |
Number of shares repurchased |  |  | — |  |  |  | — |
Average price of shares repurchased |  |  | — |  |  |  | — |
Shares remaining to be repurchased |  |  | 194,723 |  |  |  | 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 |  |  | Capitalized Under |
|  |  |  |  |  |  |  |  |  | Adequacy |  |  | Prompt Corrective |
|  | Actual |  |  | Purposes |  |  | Action Provisions |
|  | Amount |  |  | Ratio |  |  | Amount |  |  | Ratio |  |  | Amount |  |  | Ratio |
|  | (Dollars in thousands) |
As of September 30, 2015: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(to Risk Weighted Assets)- |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BancFirst Corporation |  | $ | 662,299 |  |  |  | 15.27 | % |  | $ | 346,902 |  |  |  | 8.00 | % |  | N/A |  |  | N/A |
BancFirst |  |  | 606,989 |  |  |  | 14.08 | % |  |  | 344,890 |  |  |  | 8.00 | % |  | $ | 431,113 |  |  |  | 10.00 | %
Common Equity Tier 1 Capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(to Risk Weighted Assets)- |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BancFirst Corporation |  | $ | 595,329 |  |  |  | 13.73 | % |  | $ | 195,133 |  |  |  | 4.50 | % |  | N/A |  |  | N/A |
BancFirst |  |  | 546,019 |  |  |  | 12.67 | % |  |  | 194,001 |  |  |  | 4.50 | % |  | $ | 280,223 |  |  |  | 6.50 | %
Tier 1 Capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(to Risk Weighted Assets)- |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BancFirst Corporation |  | $ | 621,329 |  |  |  | 14.33 | % |  | $ | 260,177 |  |  |  | 6.00 | % |  | N/A |  |  | N/A |
BancFirst |  |  | 566,019 |  |  |  | 13.13 | % |  |  | 258,668 |  |  |  | 6.00 | % |  | $ | 344,890 |  |  |  | 8.00 | %
Tier 1 Capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(to Total Assets)- |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BancFirst Corporation |  | $ | 621,329 |  |  |  | 9.77 | % |  | $ | 256,245 |  |  |  | 4.00 | % |  | N/A |  |  | N/A |
BancFirst |  |  | 566,019 |  |  |  | 8.91 | % |  |  | 255,669 |  |  |  | 4.00 | % |  | $ | 319,586 |  |  |  | 5.00 | %

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- Definition Tabular disclosure of the capital amounts and ratios as of the balance sheet date, indicating whether the entity or entities are in compliance with regulatory capital requirements, by entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958570-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1G -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958577-112826 + Details
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