XML 50 R38.htm IDEA: XBRL DOCUMENT
v3.4.0.3

Loans and Allowance for Loan Losses - Schedule of Loans Outstanding by Category (Detail) - USD ($) $ in Thousands | Mar. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | $ 4,275,112 | $ 4,232,048
Percent | 100.00% | 100.00%
Taxable [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | $ 17,628 | $ 17,605
Percent | 0.41% | 0.42%
Tax-exempt [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | $ 36,177 | $ 33,575
Percent | 0.85% | 0.79%
Commercial and Industrial [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | $ 790,156 | $ 795,803
Percent | 18.48% | 18.80%
Oil & Gas Production And Equipment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | $ 86,524 | $ 87,304
Percent | 2.02% | 2.06%
Agriculture [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | $ 149,442 | $ 150,620
Percent | 3.50% | 3.56%
Construction [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | $ 401,330 | $ 403,664
Percent | 9.39% | 9.54%
Farmland [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | $ 189,934 | $ 184,707
Percent | 4.44% | 4.36%
One to Four Family Residences [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | $ 825,357 | $ 821,251
Percent | 19.31% | 19.41%
Multifamily Residential Properties [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | $ 62,189 | $ 65,477
Percent | 1.45% | 1.55%
Commercial [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | $ 1,406,204 | $ 1,356,430
Percent | 32.89% | 32.05%
Consumer [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | $ 276,463 | $ 283,636
Percent | 6.47% | 6.70%
Other (Not Classified Above) [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | $ 33,708 | $ 31,976
Percent | 0.79% | 0.76%

X
- Definition Percentage of loans outstanding by category. + References No definition available. + Details
Name: | banf_PercentageOfLoansOutstandingByCategory
Namespace Prefix: | banf_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522 + Details
Name: | us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=banf_TaxableMunicipalLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=banf_NontaxableMunicipalLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=banf_CommercialAndIndustrialMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=banf_OilGasProductionAndEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=banf_AgricultureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=banf_ConstructionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=banf_FarmlandMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=banf_OneToFourFamilyResidencesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=banf_MultifamilyResidentialPropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CommercialLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_ConsumerLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=banf_OtherNotClassifiedAboveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |