Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2015

Equity [Abstract]

Summary of Authorized Outstanding Preferred and Common Stock

As of December 31, 2015, 2014 and 2013 the Company’s authorized and outstanding preferred and common stock was as follows:

	No. of Shares Authorized at		No. of Shares Outstanding at December 31,
Class of Stock	December 31, 2015		2015		2014		2013		Per Value Per Share		Dividends	Voting Rights
Senior Preferred		10,000,000		—		—		—	$	1.00	As declared	Voting
10% Cumulative Preferred		900,000		—		—		—		5.00	As declared	Non-voting
Common		20,000,000		15,597,446		15,504,513		15,333,622		1.00	As declared	Voting

Summary of Shares Repurchased Under Stock Purchase Program

The following table is a summary of the shares under the program:

	Year Ended December 31,
	2015		2014		2013
Number of shares repurchased		28,447		—		40,241
Average price of shares repurchased	$	58.19	$	—	$	40.88
Shares remaining to be repurchased		166,276		194,723		194,723

Required Capital Amounts and Company's Respective Ratios

The actual and required capital amounts and ratios are shown in the following table:

						Required					To Be Well
						For Capital					Capitalized Under
						Adequacy					Prompt Corrective
	Actual					Purposes					Action Provisions
	Amount		Ratio			Amount		Ratio			Amount		Ratio
	(Dollars in thousands)
As of December 31, 2015:
Total Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	669,213		14.47	%	$	370,094		8.00	%	N/A		N/A
BancFirst		607,604		13.15	%		369,607		8.00	%	$	462,009		10.00	%
Common Equity Tier 1 Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	596,547		12.90	%	$	208,178		4.50	%	N/A		N/A
BancFirst		545,938		11.82	%		207,904		4.50	%	$	300,306		6.50	%
Tier 1 Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	627,547		13.57	%	$	277,570		6.00	%	N/A		N/A
BancFirst		565,938		12.25	%		277,205		6.00	%	$	369,607		8.00	%
Tier 1 Capital
(to Total Assets)-
BancFirst Corporation	$	627,547		9.49	%	$	264,333		4.00	%	N/A		N/A
BancFirst		565,938		8.59	%		263,606		4.00	%	$	329,507		5.00	%
As of December 31, 2014:
Total Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	616,862		14.75	%	$	334,531		8.00	%	N/A		N/A
BancFirst		571,495		13.68	%		334,092		8.00	%	$	417,615		10.00	%
Tier 1 Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	575,973		13.77	%	$	167,265		4.00	%	N/A		N/A
BancFirst		530,606		12.71	%		167,046		4.00	%	$	250,569		6.00	%
Tier 1 Capital
(to Total Assets)-
BancFirst Corporation	$	575,973		8.83	%	$	197,249		3.00	%	N/A		N/A
BancFirst		530,606		8.15	%		196,716		3.00	%	$	327,859		5.00	%