CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Thousands, unless otherwise specified	Total	Common Stock	Surplus	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
Balance at Dec. 31, 2009	$ 61,855	$ 64	$ 18,631	$ 43,110	$ (3,472)	$ 3,522
Increase (Decrease) in Stockholders' Equity
Net income	9,166			9,166
Shares issued under the dividend reinvestment plan ("DRP"), net of offering costs	1,395		1,395
Stock awards granted and distributed			(1,147)		1,147
Vesting of stock awards	(37)				(37)
Exercise of stock options	17		(20)		37
Tax effect of stock plans	11		11
Shared based compensation expense	881		881
Cash dividend declared, $1.15, $0.69 and $0.92 per share for the year ended on December 31, 2012, 2011 and 2010, respectively	(5,813)			(5,813)
Other comprehensive income, net of deferred taxes	(1,755)					(1,755)
Balance at Dec. 31, 2010	65,720	64	19,751	46,463	(2,325)	1,767
Increase (Decrease) in Stockholders' Equity
Net income	10,359			10,359
Shares issued under the dividend reinvestment plan ("DRP"), net of offering costs	4,627	3	4,624
Shares issued in common stock offerings, net of offering costs (1,407,220 shares)	23,461	14	23,447
Shares issued in the acquisition of Hamptons State Bank (273,479 shares)	5,850	3	5,847
Stock awards granted and distributed			(1,777)		1,777
Stock awards forfeited			39		(39)
Vesting of stock awards	(128)				(128)
Tax effect of stock plans	(16)		(16)
Shared based compensation expense	1,047		1,047
Cash dividend declared, $1.15, $0.69 and $0.92 per share for the year ended on December 31, 2012, 2011 and 2010, respectively	(4,594)			(4,594)
Other comprehensive income, net of deferred taxes	661					661
Balance at Dec. 31, 2011	106,987	84	52,962	52,228	(715)	2,428
Increase (Decrease) in Stockholders' Equity
Net income	12,772			12,772
Shares issued under the dividend reinvestment plan ("DRP"), net of offering costs	10,507	5	10,502
Stock awards granted and distributed			(580)		580
Stock awards forfeited			6		(6)
Vesting of stock awards	(175)				(175)
Exercise of stock options			(7)		7
Tax effect of stock plans	(18)		(18)
Shared based compensation expense	1,343		1,343
Cash dividend declared, $1.15, $0.69 and $0.92 per share for the year ended on December 31, 2012, 2011 and 2010, respectively	(9,898)			(9,898)
Other comprehensive income, net of deferred taxes	(2,846)					(2,846)
Balance at Dec. 31, 2012	$ 118,672	$ 89	$ 64,208	$ 55,102	$ (309)	$ (418)