CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (USD $) In Thousands, unless otherwise specified	Common stock CBT	Common stock Beacon Federal	Common stock	Additional paid-in capital CBT	Additional paid-in capital Beacon Federal	Additional paid-in capital	Unearned compensation	Retained earnings	Accumulated other comprehensive (loss) income	Treasury stock	CBT	Beacon Federal	Total
Balance at Dec. 31, 2011			$ 229			$ 494,304	$ (2,790)	$ 107,920	$ (4,885)	$ (42,970)			$ 551,808
Balance (in shares) at Dec. 31, 2011			21,148
Comprehensive income:
Net income								33,188					33,188
Other net comprehensive income									1,906				1,906
Total comprehensive income													35,094
Cash dividends declared $0.69, $0.72 and $0.72 for the period ended December 31, 2014, 2013 and 2012 respectively								(15,634)					(15,634)
Forfeited shares						11	169			(180)
Forfeited shares (in shares)			(8)
Exercise of stock options								(3,460)		6,504			3,044
Exercise of stock options (in shares)			254
Restricted stock grants						(280)	(2,434)			2,714
Restricted stock grants (in shares)			108
Stock-based compensation						240	2,020						2,260
Net tax benefit related to stock-based compensation						1,126							1,126
Other, net										(428)			(428)
Other, net (in shares)			(19)
Acquisition	9	27		21,981	67,978						21,990	68,005
Acquisition (in shares)	965	2,700
Balance at Dec. 31, 2012			265			585,360	(3,035)	122,014	(2,979)	(34,360)			667,265
Balance (in shares) at Dec. 31, 2012			25,148
Comprehensive income:
Net income								41,143					41,143
Other net comprehensive income									(6,078)				(6,078)
Total comprehensive income													35,065
Cash dividends declared $0.69, $0.72 and $0.72 for the period ended December 31, 2014, 2013 and 2012 respectively								(18,118)					(18,118)
Treasury stock purchased										(12,249)			(12,249)
Treasury stock purchased (in shares)			(480)
Forfeited shares						224	1,330			(1,554)
Forfeited shares (in shares)			(58)
Exercise of stock options								(3,081)		6,126			3,045
Exercise of stock options (in shares)			237
Restricted stock grants						(634)	(5,958)			6,592
Restricted stock grants (in shares)			243
Stock-based compensation						860	2,100						2,960
Net tax benefit related to stock-based compensation						1,451							1,451
Other, net						(14)				(1,343)			(1,357)
Other, net (in shares)			(54)
Balance at Dec. 31, 2013			265			587,247	(5,563)	141,958	(9,057)	(36,788)			678,062
Balance (in shares) at Dec. 31, 2013			25,036
Comprehensive income:
Net income								33,744					33,744
Other net comprehensive income									15,636				15,636
Total comprehensive income													49,380
Cash dividends declared $0.69, $0.72 and $0.72 for the period ended December 31, 2014, 2013 and 2012 respectively								(18,075)					(18,075)
Treasury stock purchased										(2,468)			(2,468)
Treasury stock purchased (in shares)			(100)
Forfeited shares						(3)	221			(218)
Forfeited shares (in shares)			(9)
Exercise of stock options								(1,181)		2,245			1,064
Exercise of stock options (in shares)			90
Restricted stock grants						(19)	(4,604)			4,623
Restricted stock grants (in shares)			187
Stock-based compensation						41	3,799						3,840
Net tax benefit related to stock-based compensation						(1,971)							(1,971)
Other, net						(6)				(539)			(545)
Other, net (in shares)			(21)
Balance at Dec. 31, 2014			$ 265			$ 585,289	$ (6,147)	$ 156,446	$ 6,579	$ (33,145)			$ 709,287
Balance (in shares) at Dec. 31, 2014			25,183