XML 57 R48.htm IDEA: XBRL DOCUMENT
v3.22.1

Loans Held for Investment and Allowance for Credit Losses on Loans - Activity in Allowance for Credit Losses on Loans (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Balance at beginning of period | $ 83,936 | $ 91,366
Initial allowance on loans purchased with credit deterioration | 78 |
Charge- offs | (322) | (666)
Recoveries | 611 | 160
Net charge-offs | 289 | (506)
Provision for/(benefit from) credit losses | 2,936 | 0
Balance at end of period | 87,239 | 90,860
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Balance at beginning of period | 6,410 | 6,911
Charge- offs | (16) |
Recoveries | 48 |
Net charge-offs | 32 |
Provision for/(benefit from) credit losses | 346 | (406)
Balance at end of period | 6,788 | 6,505
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Balance at beginning of period | 16,987 | 12,318
Charge- offs |  | (38)
Net charge-offs |  | (38)
Provision for/(benefit from) credit losses | 3,687 | 5,219
Balance at end of period | 20,674 | 17,499
Real Estate [Member] | Construction and Development Less than 60 Months [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Balance at beginning of period | 3,490 | 2,723
Recoveries | 3 | 3
Net charge-offs | 3 | 3
Provision for/(benefit from) credit losses | (184) | 217
Balance at end of period | 3,309 | 2,943
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Balance at beginning of period | 1,092 | 726
Provision for/(benefit from) credit losses | 1,072 | 366
Balance at end of period | 2,164 | 1,092
Real Estate [Member] | Residential Real Estate First Lien [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Balance at beginning of period | 3,076 | 2,822
Initial allowance on loans purchased with credit deterioration | 2 |
Charge- offs | (44) | (43)
Recoveries | 7 | 15
Net charge-offs | (37) | (28)
Provision for/(benefit from) credit losses | 380 | 143
Balance at end of period | 3,421 | 2,937
Real Estate [Member] | Residential Real Estate All Other [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Balance at beginning of period | 2,104 | 2,236
Charge- offs |  | (16)
Recoveries | 402 | 3
Net charge-offs | 402 | (13)
Provision for/(benefit from) credit losses | (399) | (343)
Balance at end of period | 2,107 | 1,880
Commercial and Agricultural Non-Real Estate [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Balance at beginning of period | 26,073 | 33,020
Initial allowance on loans purchased with credit deterioration | 48 |
Charge- offs | (171) | (104)
Recoveries | 113 | 27
Net charge-offs | (58) | (77)
Provision for/(benefit from) credit losses | (77) | 922
Balance at end of period | 25,986 | 33,865
Consumer Non-real Estate [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Balance at beginning of period | 3,734 | 3,542
Initial allowance on loans purchased with credit deterioration | 28 |
Charge- offs | (80) | (413)
Recoveries | 38 | 112
Net charge-offs | (42) | (301)
Provision for/(benefit from) credit losses | 51 | 180
Balance at end of period | 3,771 | 3,421
Oil and Gas [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Balance at beginning of period | 12,978 | 20,733
Provision for/(benefit from) credit losses | (1,573) | (6,293)
Balance at end of period | 11,405 | 14,440
Other Loans [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Balance at beginning of period | 3,170 | 3,182
Charge- offs | (11) | (52)
Net charge-offs | (11) | (52)
Provision for/(benefit from) credit losses | 72 | 60
Balance at end of period | 3,231 | 3,190
Farmland [Member] | Real Estate [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Balance at beginning of period | 4,822 | 3,153
Provision for/(benefit from) credit losses | (439) | (65)
Balance at end of period | $ 4,383 | $ 3,088

X
- Definition Financing receivable allowance for credit gross recoveries and losses write offs. + References No definition available. + Details
Name: | banf_FinancingReceivableAllowanceForCreditGrossRecoveriesAndLossesWriteOffs
Namespace Prefix: | banf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Financing receivable allowance for credit loss purchased with credit deterioration increase decrease. + References No definition available. + Details
Name: | banf_FinancingReceivableAllowanceForCreditLossPurchasedWithCreditDeteriorationIncreaseDecrease
Namespace Prefix: | banf_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount, after recoveries, of loans and leases that have been written-off. + References No definition available. + Details
Name: | us-gaap_AllowanceForLoanAndLeaseLossesWriteoffsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(7)(2)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (3) Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (c) Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (1) + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLosses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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 of increase in allowance for credit loss on financing receivable from recovery. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of credit loss expense (reversal of expense) for financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(11)) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 + Details
Name: | us-gaap_ProvisionForLoanLossesExpensed
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=banf_RealEstatePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

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

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

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

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=banf_CommercialAndAgriculturalNonRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=banf_ConsumerNonRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_OilAndGasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=banf_OtherLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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