XML 39 R102.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2

Net Income Per Common Share - Average Exercise Prices of Options Excluded from Computation of Diluted Net Income Per Common Share (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Abstract]
Shares	180,989	92,738	55,337
Average Exercise Price	$ 54.73	$ 53.17	$ 46.86

X

- Definition

Average exercise prices of options excluded from computation of diluted net income per common share.

+ References

No definition available.

+ Details

Name:	banf_AverageExercisePricesOfOptionsExcludedFromComputationOfDilutedNetIncomePerCommonShare
Namespace Prefix:	banf_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Schedule of antidilutive securities excluded from computation of earnings per share.

+ References

No definition available.

+ Details

Name:	banf_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAbstract
Namespace Prefix:	banf_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

+ Details

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration