XML 74 R65.htm IDEA: XBRL DOCUMENT
v3.23.2

Stockholders' Equity - Summary of Shares Repurchased Under Stock Purchase Program (Detail) | Jun. 30, 2023 shares
--- | ---
Summary Of Shares Repurchased Under Stock Purchase Program [Abstract] |
Shares remaining to be repurchased | 500,486

X
- Definition Summary of shares repurchased under stock purchase program. + References No definition available. + Details
Name: | banf_SummaryOfSharesRepurchasedUnderStockPurchaseProgramAbstract
Namespace Prefix: | banf_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The remaining number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant