XML 32 R9.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Recent Developments, Including Mergers and Acquisitions | 3 Months Ended
--- | ---
Mar. 31, 2015
Recent Developments Including Mergers And Acquisitions [Abstract] |
Recent Developments, Including Mergers and Acquisitions |
(2) | RECENT DEVELOPMENTS, INCLUDING MERGERS AND ACQUISITIONS
In January 2015, Council Oak Investment Corporation, a wholly-owned subsidiary of BancFirst, received a pretax gain of approximately $1.7 million from one of its investments.

X
- Details
Name: | banf_RecentDevelopmentsIncludingMergersAndAcquisitionsAbstract
Namespace Prefix: | banf_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Recent developments including mergers and acquisitions. + References No definition available. + Details
Name: | banf_RecentDevelopmentsIncludingMergersAndAcquisitionsTextBlock
Namespace Prefix: | banf_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration