XML 99 R80.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Intangible Assets and Goodwill - Summary of Goodwill by Business Segment (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013
Goodwill [Line Items] |  |
Balance at beginning of period | $ 44,545 us-gaap_Goodwill |
Acquisitions | 417 us-gaap_GoodwillPurchaseAccountingAdjustments |
Balance at end of period | 44,962 us-gaap_Goodwill |
Metropolitan Banks [Member] |  |
Goodwill [Line Items] |  |
Balance at beginning of period |  | 8,078 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = banf_MetropolitanBanksMember
Balance at end of period | 8,078 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = banf_MetropolitanBanksMember | 8,078 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = banf_MetropolitanBanksMember
Community Banks [Member] |  |
Goodwill [Line Items] |  |
Balance at beginning of period | 30,553 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = banf_CommunityBanksMember |
Acquisitions | 417 us-gaap_GoodwillPurchaseAccountingAdjustments / us-gaap_StatementBusinessSegmentsAxis = banf_CommunityBanksMember |
Balance at end of period | 30,970 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = banf_CommunityBanksMember |
Other Financial Services [Member] |  |
Goodwill [Line Items] |  |
Balance at beginning of period |  | 5,464 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Balance at end of period | 5,464 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 5,464 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Executive, Operations & Support [Member] |  |
Goodwill [Line Items] |  |
Balance at beginning of period |  | 450 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = banf_ExecutiveOperationsAndSupportMember
Balance at end of period | $ 450 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = banf_ExecutiveOperationsAndSupportMember | $ 450 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = banf_ExecutiveOperationsAndSupportMember

X
- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
Name: | us-gaap_Goodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_GoodwillLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e961-128460 + Details
Name: | us-gaap_GoodwillPurchaseAccountingAdjustments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=banf_CommunityBanksMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=banf_ExecutiveOperationsAndSupportMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=banf_MetropolitanBanksMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=us-gaap_AllOtherSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |