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Network
101150 - Disclosure - Fair Value Measurements - Changes in Level 3 Assets Measured at Estimated Fair Value on Recurring Basis (Detail)
(http://www.bancfirst.com/20161231/taxonomy/role/DisclosureFairValueMeasurementsChangesInLevel3AssetsMeasuredAtEstimatedFairValueOnRecurringBasisDetail)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000760498 (http://www.sec.gov/CIK)
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation Calculation Roll ForwardPeriod [Axis]
2016-01-01 - 2016-12-31
2015-01-01 - 2015-12-31
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation Calculation Roll Forward
 
 
Balance at the beginning of the year
21,124,000  
28,459,000  
Purchases
1,096,000  
609,000  
Settlements
(191,000) 
(2,327,000) 
Sales
(429,000) 
(8,817,000) 
(Losses) gains included in earnings
(111,000) 
7,141,000  
Total unrealized losses
(104,000) 
(3,941,000) 
Balance at the end of the period
21,385,000  
 
21,124,000