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Stockholder's Equity (Details Textual) (USD $) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Stockholders' Equity (Additional Textual) [Abstract] |  |  |
Available equity of BancFirst for Dividend payments to the Company | $ 61,000,000 |  |
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% |  |
Common stock, shares issued | 15,242,308 | 15,242,308 |
Common stock, shares outstanding | 15,117,430 | 15,117,430 | 15,368,717
Senior Preferred Stock [Member] |  |  |
Stockholders' equity (Textual) [Abstract] |  |  |
Preferred stock, shares issued |  |  |
Preferred stock, shares outstanding |  |  |
Cumulative Preferred Stock [Member] |  |  |
Stockholders' equity (Textual) [Abstract] |  |  |
Preferred stock, shares issued |  |  |
Preferred stock, shares outstanding |  |  |
Cumulative preferred stock dividend rate | 10.00% |  |
Dividend payable at redemption, per share | $ 5.00 |  |
Maximum [Member] |  |  |
Stockholders' equity (Textual) [Abstract] |  |  |
Quantitative limit for trust preferred securities to be included in tier 1 capital | $ 10,000,000,000 |  |

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- Definition Quantitative limit for Trust Preferred securities to be included in Tier 1 capital. + References No definition available. + Details
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- Definition The amount of dividends that may be paid or declared in any calendar year without prior approval of regulatory agencies. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e)) -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph e -Article 4 + Details
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- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
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- Definition The price per share at which the preferred stock of an entity that has priority over common stock in the distribution of dividends and in the event of liquidation of the entity is redeemed or may be called at. The redemption features of this preferred stock are solely within the control of the issuer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 7 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 4, 8 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21564-112644 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21488-112644 + Details
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