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Stockholders' Equity (Tables) | 6 Months Ended
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Jun. 30, 2018
Equity [Abstract] |
Summary of Shares Repurchased Under Stock Purchase Program | The following table is a summary of the shares under the program:
|  | Six Months Ended June 30, |
|  | 2018 |  |  | 2017 |
Number of shares repurchased |  |  | — |  |  |  | — |
Average price of shares repurchased |  | $ | — |  |  | $ | — |
Shares remaining to be repurchased |  |  | 300,000 |  |  |  | 300,000 |
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, 2018: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(to Risk Weighted Assets)- |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BancFirst Corporation |  | $ | 851,222 |  |  | 15.80% |  |  | $ | 430,907 |  |  |  | 8.00% |  |  | $ | 424,174 |  |  | 9.875% |  |  | N/A |  |  | N/A |
BancFirst |  |  | 731,628 |  |  | 13.75% |  |  |  | 425,551 |  |  |  | 8.00% |  |  |  | 525,290 |  |  | 9.875% |  |  | $ | 531,939 |  |  |  | 10.00% |
Common Equity Tier 1 Capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(to Risk Weighted Assets)- |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BancFirst Corporation |  | $ | 768,022 |  |  | 14.26% |  |  | $ | 242,385 |  |  |  | 4.50% |  |  | $ | 343,379 |  |  | 6.375% |  |  | N/A |  |  | N/A |
BancFirst |  |  | 659,428 |  |  | 12.40% |  |  |  | 239,373 |  |  |  | 4.50% |  |  |  | 339,111 |  |  | 6.375% |  |  | $ | 345,760 |  |  |  | 6.50% |
Tier 1 Capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(to Risk Weighted Assets)- |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BancFirst Corporation |  | $ | 799,022 |  |  | 14.83% |  |  | $ | 323,180 |  |  |  | 6.00% |  |  | $ | 531,901 |  |  | 7.875% |  |  | N/A |  |  | N/A |
BancFirst |  |  | 679,428 |  |  | 12.77% |  |  |  | 319,163 |  |  |  | 6.00% |  |  |  | 418,902 |  |  | 7.875% |  |  | $ | 425,551 |  |  |  | 8.00% |
Tier 1 Capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
(to Total Assets)- |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BancFirst Corporation |  | $ | 799,022 |  |  | 10.67% |  |  | $ | 299,443 |  |  |  | 4.00% |  |  | N/A |  |  | N/A |  |  | N/A |  |  | N/A |
BancFirst |  |  | 679,428 |  |  | 9.18% |  |  |  | 295,894 |  |  |  | 4.00% |  |  | N/A |  |  | N/A |  |  | $ | 369,868 |  |  |  | 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=84167132&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=84167132&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=84167132&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=84167132&loc=SL5958577-112826 + Details
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