XML 42 R40.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Loans and Allowance for Loan Losses - Age Analysis of Past Due Loans Segregated By Class of Loans (Detail) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2013 | Dec. 31, 2012 | Jun. 30, 2012
--- | --- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
30-89 Days Past Due | $ 13,194 |  | $ 14,523
90 Days and Greater | 7,153 |  | 7,175
Total Past Due Loans | 20,347 |  | 21,698
Current Loans | 3,224,737 |  | 3,043,741
Total Loans | 3,245,084 | 3,242,427 | 3,065,439
Accruing Loans 90 Days or More Past Due | 850 | 537 | 1,403
Non-residential real estate [Member] |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
30-89 Days Past Due | 2,078 |  | 2,649
90 Days and Greater | 3,194 |  | 2,454
Total Past Due Loans | 5,272 |  | 5,103
Current Loans | 1,246,052 |  | 1,135,948
Total Loans | 1,251,324 |  | 1,141,051
Accruing Loans 90 Days or More Past Due | 171 |  | 285
Residential real estate [Member] |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
30-89 Days Past Due | 2,990 |  | 4,240
90 Days and Greater | 817 |  | 1,288
Total Past Due Loans | 3,807 |  | 5,528
Current Loans | 788,947 |  | 715,621
Total Loans | 792,754 |  | 721,149
Accruing Loans 90 Days or More Past Due | 151 |  | 478
Non-consumer non-real estate [Member] |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
30-89 Days Past Due | 3,519 |  | 1,285
90 Days and Greater | 816 |  | 244
Total Past Due Loans | 4,335 |  | 1,529
Current Loans | 745,327 |  | 695,887
Total Loans | 749,662 |  | 697,416
Accruing Loans 90 Days or More Past Due | 32 |  | 16
Consumer non-real estate [Member] |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
30-89 Days Past Due | 2,382 |  | 2,002
90 Days and Greater | 213 |  | 183
Total Past Due Loans | 2,595 |  | 2,185
Current Loans | 214,785 |  | 198,242
Total Loans | 217,380 |  | 200,427
Accruing Loans 90 Days or More Past Due | 176 |  | 122
Other loans [Member] |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
30-89 Days Past Due | 1,850 |  | 1,213
90 Days and Greater | 1,520 |  | 1,654
Total Past Due Loans | 3,370 |  | 2,867
Current Loans | 144,135 |  | 153,117
Total Loans | 147,505 |  | 155,984
Accruing Loans 90 Days or More Past Due |  |  | 102
Acquired loans [Member] |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
30-89 Days Past Due | 375 |  | 3,134
90 Days and Greater | 593 |  | 1,352
Total Past Due Loans | 968 |  | 4,486
Current Loans | 85,491 |  | 144,926
Total Loans | 86,459 |  | 149,412
Accruing Loans 90 Days or More Past Due | $ 320 |  | $ 400

X
- Definition Financing Receivable Recorded Investment Thirty To Eighty Nine Days Past Due + References No definition available. + Details
Name: | banf_FinancingReceivableRecordedInvestmentThirtyToEightyNineDaysPastDue
Namespace Prefix: | banf_
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=28368275&loc=d3e5111-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Financing receivables that are current. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953401-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Financing receivables that are equal to or greater than 90 days past due. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953401-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Recorded Investment in financing receivables that are past due at 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 7A -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953401-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentPastDue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems
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