Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2020

Equity [Abstract]

Summary of Authorized Outstanding Preferred and Common Stock

As of December 31, 2020, 2019 and 2018 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, 2020		2020		2019		2018		Par 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		40,000,000		32,719,852		32,694,268		32,603,926		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,
	2020		2019		2018
Number of shares repurchased		59,284		26,670		151,264
Average price of shares repurchased	$	52.26	$	60.04	$	52.32
Shares remaining to be repurchased		62,782		122,066		148,736

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			With					Capitalized Under
						Adequacy			Capital Conservation					Prompt Corrective
	Actual					Purposes			Buffer					Action Provisions
	Amount		Ratio			Amount		Ratio	Amount		Ratio			Amount		Ratio
	(Dollars in thousands)
As of December 31, 2020:
Total Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	997,383		15.64	%	$	510,110	8.00%	$	669,519		10.50	%	N/A		N/A
BancFirst		898,714		15.59	%		461,142	8.00%		605,248		10.50	%	$	576,427		10.00	%
Pegasus Bank		70,922		11.85	%		47,893	8.00%		62,860		10.50	%		59,866		10.00	%
Common Equity Tier 1 Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	891,534		13.98	%	$	286,937	4.50%	$	446,346		7.00	%	N/A		N/A
BancFirst		806,478		13.99	%		259,392	4.50%		403,499		7.00	%	$	374,678		6.50	%
Pegasus Bank		66,150		11.05	%		26,940	4.50%		41,906		7.00	%		38,913		6.50	%
Tier 1 Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	917,534		14.39	%	$	382,583	6.00%	$	541,992		8.50	%	N/A		N/A
BancFirst		826,478		14.34	%		345,856	6.00%		489,963		8.50	%	$	461,142		8.00	%
Pegasus Bank		66,150		11.05	%		35,920	6.00%		50,886		8.50	%		47,893		8.00	%
Tier 1 Capital
(to Total Assets)-
BancFirst Corporation	$	917,534		9.63	%	$	380,952	4.00%	N/A		N/A			N/A		N/A
BancFirst		826,478		9.48	%		348,666	4.00%	N/A		N/A			$	435,833		5.00	%
Pegasus Bank		66,150		8.10	%		32,682	4.00%	N/A		N/A				40,852		5.00	%
As of December 31, 2019:
Total Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	910,561		14.42	%	$	505,050	8.00%	$	662,878		10.50	%	N/A		N/A
BancFirst		827,928		14.14	%		468,107	8.00%		614,390		10.50	%	$	585,134		10.00	%
Pegasus Bank		63,817		14.15	%		36,083	8.00%		47,359		10.50	%		45,104		10.00	%
Common Equity Tier 1 Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	830,323		13.15	%	$	284,091	4.50%	$	441,919		7.00	%	N/A		N/A
BancFirst		753,659		12.88	%		263,310	4.50%		409,594		7.00	%	$	380,337		6.50	%
Pegasus Bank		60,214		13.35	%		20,297	4.50%		31,573		7.00	%		29,317		6.50	%
Tier 1 Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	856,323		13.56	%	$	378,788	6.00%	$	536,616		8.50	%	N/A		N/A
BancFirst		773,659		13.22	%		351,080	6.00%		497,364		8.50	%	$	468,107		8.00	%
Pegasus Bank		60,214		13.35	%		27,062	6.00%		38,338		8.50	%		36,083		8.00	%
Tier 1 Capital
(to Total Assets)-
BancFirst Corporation	$	856,323		10.28	%	$	333,171	4.00%	N/A		N/A			N/A		N/A
BancFirst		773,659		10.22	%		302,845	4.00%	N/A		N/A			$	378,556		5.00	%
Pegasus Bank		60,214		8.58	%		28,058	4.00%	N/A		N/A				35,072		5.00	%