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Stockholders' Equity - Additional Information (Detail) (USD $) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Stockholders Equity [Line Items] |  |  |
Available equity of BancFirst for Dividend payments to the Company | $ 65,700,000 |  |
Minimum Tier 1 Ratio to be well capitalized | 6.00% |  |
Minimum combined Tier 1 and Tier 2 Ratio to be well capitalized | 10.00% |  |
Minimum Leverage Ratio to be well capitalized | 5.00% |  |
Maximum [Member] |  |  |
Stockholders Equity [Line Items] |  |  |
Quantitative limit for trust preferred securities to be included in tier 1 capital | $ 10,000,000,000 |  |
Cumulative preferred stock [Member] |  |  |
Stockholders Equity [Line Items] |  |  |
Preferred stock, shares issued |  |  |
Preferred stock, shares outstanding |  |  |
Cumulative preferred stock dividend rate | 10.00% |  |
Dividend payable at redemption, per share | $ 5.00 |  |
Senior preferred stock [Member] |  |  |
Stockholders Equity [Line Items] |  |  |
Preferred stock, shares issued |  |  |
Preferred stock, shares outstanding |  |  |
2015 [Member] |  |  |
Stockholders Equity [Line Items] |  |  |
Implementation of the deductions and other adjustments to CET1 | 4 years |  |
Implementation of the deductions and other adjustments to CET1, Percentage | 40.00% |  |
2015 [Member] | Minimum [Member] |  |  |
Stockholders Equity [Line Items] |  |  |
Minimum ratio of CET1 to risk-weighted assets | 4.50% |  |
Tier 1 capital to risk-weighted assets | 6.00% |  |
Total capital to risk weighted assets | 8.00% |  |
Minimum leverage ratio | 4.00% |  |
2016 [Member] |  |  |
Stockholders Equity [Line Items] |  |  |
Implementation of the capital conservation buffer, Percentage | 0.625% |  |
Capital conservation buffer implementation phaseout period | 4 years |  |
2019 [Member] |  |  |
Stockholders Equity [Line Items] |  |  |
Capital Conservation Buffer Maximum Level | 2.50% |  |
After 2015 [Member] |  |  |
Stockholders Equity [Line Items] |  |  |
Implementation of the deductions and other adjustments to CET1, Additional Percentage | 20.00% |  |

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