XML 29 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 | Sep. 30, 2013 | Dec. 31, 2012 | Sep. 30, 2012
--- | --- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
30-89 Days Past Due | $ 16,535 |  | $ 14,462
90 Days and Greater | 7,099 |  | 6,468
Total Past Due Loans | 23,634 |  | 20,930
Current Loans | 3,335,304 |  | 3,095,166
Total Loans | 3,358,938 | 3,242,427 | 3,116,096
Accruing Loans 90 Days or More Past Due | 1,266 | 537 | 731
Non-residential real estate owner occupied [Member] |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
30-89 Days Past Due | 779 |  | 915
90 Days and Greater | 326 |  | 466
Total Past Due Loans | 1,105 |  | 1,381
Current Loans | 458,241 |  | 480,319
Total Loans | 459,346 |  | 481,700
Accruing Loans 90 Days or More Past Due | 308 |  | 349
Non-residential real estate other [Member] |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
30-89 Days Past Due | 6,046 |  | 646
90 Days and Greater | 1,925 |  | 1,959
Total Past Due Loans | 7,971 |  | 2,605
Current Loans | 869,531 |  | 665,265
Total Loans | 877,502 |  | 667,870
Accruing Loans 90 Days or More Past Due | 51 |  |
Residential real estate permanent mortgage [Member] |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
30-89 Days Past Due | 2,017 |  | 2,058
90 Days and Greater | 492 |  | 399
Total Past Due Loans | 2,509 |  | 2,457
Current Loans | 253,708 |  | 242,209
Total Loans | 256,217 |  | 244,666
Accruing Loans 90 Days or More Past Due | 217 |  | 12
Residential real estate all other [Member] |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
30-89 Days Past Due | 1,900 |  | 1,635
90 Days and Greater | 1,401 |  | 771
Total Past Due Loans | 3,301 |  | 2,406
Current Loans | 547,849 |  | 490,726
Total Loans | 551,150 |  | 493,132
Accruing Loans 90 Days or More Past Due | 32 |  | 86
Non-consumer non-real estate [Member] |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
30-89 Days Past Due | 889 |  | 4,233
90 Days and Greater | 1,013 |  | 135
Total Past Due Loans | 1,902 |  | 4,368
Current Loans | 776,576 |  | 729,538
Total Loans | 778,478 |  | 733,906
Accruing Loans 90 Days or More Past Due | 138 |  | 7
Consumer non-real estate [Member] |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
30-89 Days Past Due | 2,179 |  | 2,050
90 Days and Greater | 194 |  | 230
Total Past Due Loans | 2,373 |  | 2,280
Current Loans | 222,122 |  | 205,463
Total Loans | 224,495 |  | 207,743
Accruing Loans 90 Days or More Past Due | 187 |  | 170
Other loans [Member] |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
30-89 Days Past Due | 1,531 |  | 1,706
90 Days and Greater | 1,275 |  | 1,447
Total Past Due Loans | 2,806 |  | 3,153
Current Loans | 136,060 |  | 147,329
Total Loans | 138,866 |  | 150,482
Accruing Loans 90 Days or More Past Due | 236 |  | 43
Acquired loans [Member] |  |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |  |
30-89 Days Past Due | 1,194 |  | 1,219
90 Days and Greater | 473 |  | 1,061
Total Past Due Loans | 1,667 |  | 2,280
Current Loans | 71,217 |  | 134,317
Total Loans | 72,884 |  | 136,597
Accruing Loans 90 Days or More Past Due | $ 97 |  | $ 64

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