XML 143 R74.htm IDEA: XBRL DOCUMENT v2.4.0.8

Loans and Allowance for Loan Losses - ALLL for Impaired Loans with Specific Reserves (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Receivables [Abstract]
Allowance for loss on impaired loans	$ 2,661	$ 3,252	$ 2,779
Recorded balance of impaired loans	12,647	12,313	13,437
Average recorded investment	$ 12,480	$ 12,875	$ 11,974

X

- Definition

Impaired Financing Loan With Specific Reserve Related Allowance

+ References

No definition available.

+ Details

Name:	banf_ImpairedFinancingLoanWithSpecificReserveRelatedAllowance
Namespace Prefix:	banf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Impaired Financing Receivable Average Recorded Value Of Investment

+ References

No definition available.

+ Details

Name:	banf_ImpairedFinancingReceivableAverageRecordedValueOfInvestment
Namespace Prefix:	banf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of investment in impaired financing receivables for which there is a related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 14A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953550-111524

+ Details

Name:	us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_ReceivablesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration