Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2017

Equity [Abstract]

Summary of Shares Repurchased Under Stock Purchase Program

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

	Three Months Ended March 31,
	2017		2016
Number of shares repurchased		—		100,000
Average price of shares repurchased	$	—	$	55.23
Shares remaining to be repurchased		150,000		66,276

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 March 31, 2017:
Total Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	743,955		15.72%	$	378,690		8.00%	$	437,861		9.250%	N/A		N/A
BancFirst		668,329		14.14%		378,252		8.00%		437,354		9.250%	$	472,815		10.00%
Common Equity Tier 1 Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	665,034		14.05%	$	213,013		4.50%	$	272,184		5.750%	N/A		N/A
BancFirst		600,408		12.70%		212,767		4.50%		271,869		5.750%	$	307,330		6.50%
Tier 1 Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	696,034		14.70%	$	284,018		6.00%	$	343,188		7.250%	N/A		N/A
BancFirst		620,408		13.12%		283,689		6.00%		342,791		7.250%	$	378,252		8.00%
Tier 1 Capital
(to Total Assets)-
BancFirst Corporation	$	696,034		9.95%	$	279,674		4.00%	N/A		N/A		N/A		N/A
BancFirst		620,408		8.88%		279,412		4.00%	N/A		N/A		$	349,266		5.00%