XML 12 R1.htm IDEA: XBRL DOCUMENT
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Document and Entity Information - shares | 3 Months Ended |
--- | --- | ---
Mar. 31, 2017 | Apr. 28, 2017
Document And Entity Information [Abstract] |  |
Document Type | 10-Q |
Amendment Flag | false |
Document Period End Date | Mar. 31, 2017 |
Document Fiscal Year Focus | 2017 |
Document Fiscal Period Focus | Q1 |
Trading Symbol | BANF |
Entity Registrant Name | BANCFIRST CORP /OK/ |
Entity Central Index Key | 0000760498 |
Current Fiscal Year End Date | --12-31 |
Entity Filer Category | Accelerated Filer |
Entity Common Stock, Shares Outstanding |  | 15,906,276

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