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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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Combined tier one and tier two ratio.

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Quantitative limit for Trust Preferred securities to be included in Tier 1 capital.

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The amount of dividends that may be paid or declared in any calendar year without prior approval of regulatory agencies.

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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.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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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.

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Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt.

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Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.

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The amount of Tier 1 Leverage Capital required to be categorized as well capitalized divided by average assets as defined in the regulatory framework for prompt corrective action.

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The Tier 1 capital ratio (Tier 1 capital divided by risk weighted assets) required to be categorized as "well capitalized" under the regulatory framework for prompt corrective action.

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