XML 87 R38.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Loans and Allowance for Loan Losses - Summary of Nonperforming and Restructured Assets (Detail) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2015 | Dec. 31, 2014 | Mar. 31, 2014
--- | --- | --- | ---
Summary Of Nonperforming And Restructured Assets [Abstract] |  |  |
Past due 90 days or more and still accruing | $ 1,498 us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing | $ 1,135 us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing | $ 910 us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
Nonaccrual | 16,562 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus | 16,410 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus | 17,753 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
Restructured | 16,131 us-gaap_FinancingReceivableModificationsRecordedInvestment | 16,515 us-gaap_FinancingReceivableModificationsRecordedInvestment | 17,468 us-gaap_FinancingReceivableModificationsRecordedInvestment
Total nonperforming and restructured loans | 34,191 banf_FinancingReceivableRecordedInvestmentNonperformingAndRestructuredLoans | 34,060 banf_FinancingReceivableRecordedInvestmentNonperformingAndRestructuredLoans | 36,131 banf_FinancingReceivableRecordedInvestmentNonperformingAndRestructuredLoans
Other real estate owned and repossessed assets | 6,418 us-gaap_OtherRealEstateAndForeclosedAssets | 8,079 us-gaap_OtherRealEstateAndForeclosedAssets | 7,590 us-gaap_OtherRealEstateAndForeclosedAssets
Total nonperforming and restructured assets | $ 40,609 banf_FinancingReceivableRecordedInvestmentNonperformingAndRestructuredAssets | $ 42,139 banf_FinancingReceivableRecordedInvestmentNonperformingAndRestructuredAssets | $ 43,721 banf_FinancingReceivableRecordedInvestmentNonperformingAndRestructuredAssets
Nonperforming and restructured loans to total loans | 0.89%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans | 0.88%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans | 1.02%us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans
Nonperforming and restructured assets to total assets | 0.62%banf_NonperformingAndRestructuredAssetsToAssets | 0.64%banf_NonperformingAndRestructuredAssetsToAssets | 0.69%banf_NonperformingAndRestructuredAssetsToAssets

X
- Definition Financing receivable recorded investment nonperforming and restructured assets. + References No definition available. + Details
Name: | banf_FinancingReceivableRecordedInvestmentNonperformingAndRestructuredAssets
Namespace Prefix: | banf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Financing receivable recorded investment nonperforming and restructured loans. + References No definition available. + Details
Name: | banf_FinancingReceivableRecordedInvestmentNonperformingAndRestructuredLoans
Namespace Prefix: | banf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Nonperforming and restructured assets to assets. + References No definition available. + Details
Name: | banf_NonperformingAndRestructuredAssetsToAssets
Namespace Prefix: | banf_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | banf_SummaryOfNonperformingAndRestructuredAssetsAbstract
Namespace Prefix: | banf_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554 + Details
Name: | us-gaap_FinancingReceivableModificationsRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Recorded investment in financing receivables that are 90 days or more past due and still accruing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5111-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5111-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Reflects the percentage derived from dividing impaired loans on which interest has ceased to be accrued by total loans. + References No definition available. + Details
Name: | us-gaap_LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Carrying amount as of the balance sheet date of other real estate and foreclosed assets. Other real estate may include real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations may also be included in real estate owned. Foreclosed assets include all assets obtained in full or partial satisfaction of a debt arrangement through foreclosure proceedings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10(4)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_OtherRealEstateAndForeclosedAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant