CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Surplus	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Total
Balance at Dec. 31, 2013	$ 113	$ 111,377	$ 61,441	$ (235)	$ (13,236)	$ 159,460
Increase (Decrease) in Stockholders' Equity
Net income			13,763			13,763
Shares issued under the dividend reinvestment plan ("DRP")	1	630				631
Shares issued in the acquisition of FNBNY Bancorp and Community National Bank ("CNB"), net of offering costs (240,598 shares) and (5,647,268 shares), respectively.	2	5,946				5,948
Stock awards granted and distributed	1	(432)		431
Stock awards forfeited		58		(58)
Repurchase of surrendered stock from vesting of restricted stock awards				(173)		(173)
Exercise of stock options		(3)		10		7
Tax effect of stock plans		36				36
Shared based compensation expense		1,234				1,234
Cash dividend declared, $0.92 per share for December 31, 2014 and $0.92 per share for December 31, 2015 and $0.92 per share for December 31, 2016			(10,657)			(10,657)
Other comprehensive income (loss), net of deferred income taxes					4,869	4,869
Balance at Dec. 31, 2014	117	118,846	64,547	(25)	(8,367)	175,118
Increase (Decrease) in Stockholders' Equity
Net income			21,111			21,111
Shares issued under the dividend reinvestment plan ("DRP")		779				779
Shares issued in the acquisition of FNBNY Bancorp and Community National Bank ("CNB"), net of offering costs (240,598 shares) and (5,647,268 shares), respectively.	56	157,143				157,199
Stock awards granted and distributed	1	(263)		262
Stock awards forfeited		125		(125)
Repurchase of surrendered stock from vesting of restricted stock awards				(228)		(228)
Exercise of stock options		(36)		116		80
Tax effect of stock plans		50				50
Shared based compensation expense		1,689				1,689
Cash dividend declared, $0.92 per share for December 31, 2014 and $0.92 per share for December 31, 2015 and $0.92 per share for December 31, 2016			(13,415)			(13,415)
Other comprehensive income (loss), net of deferred income taxes					(1,255)	(1,255)
Balance at Dec. 31, 2015	174	278,333	72,243		(9,622)	341,128
Increase (Decrease) in Stockholders' Equity
Net income			35,491			35,491
Shares issued under the dividend reinvestment plan ("DRP")		921				921
Shares issued in common stock offering, net of offering costs (1,613,000 shares)	16	47,505				47,521
Shares issued for trust preferred securities conversions (10,344 shares)		292				292
Stock awards granted and distributed	1	(205)		204
Stock awards forfeited		173		(173)
Repurchase of surrendered stock from vesting of restricted stock awards				(344)		(344)
Exercise of stock options		(90)		152		62
Impact of modification of convertible trust preferred securities		356				356
Shared based compensation expense		2,142				2,142
Cash dividend declared, $0.92 per share for December 31, 2014 and $0.92 per share for December 31, 2015 and $0.92 per share for December 31, 2016			(16,140)			(16,140)
Other comprehensive income (loss), net of deferred income taxes					(3,442)	(3,442)
Balance at Dec. 31, 2016	$ 191	$ 329,427	$ 91,594	$ (161)	$ (13,064)	$ 407,987