CONSOLIDATED STATEMENT OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	COMMON STOCK	ADDITIONAL PAID-IN CAPITAL	RETAINED EARNINGS	ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME	TREASURY STOCK
Balance (in shares) at Dec. 31, 2012		4,019,112
Balance at Dec. 31, 2012	$ 93,726	$ 33,492	$ 18,157	$ 43,030	$ 5,357	$ (6,310)
Increase (Decrease) in Stockholders' Equity
Net income	14,084			14,084
Other comprehensive income (loss)	(10,251)				(10,251)
Dividends declared	(9,560)			(9,560)
Common shares issued for acquisition of Luzerne National Bank Corporation (in shares)		978,977
Common shares issued for acquisition of Luzerne National Bank Corporation	39,736	$ 8,158	31,578
Common shares issued for employee stock purchase plan (in shares)		1,840
Common shares issued for employee stock purchase plan	80	$ 15	65
Balance (in shares) at Dec. 31, 2013		4,999,929
Balance at Dec. 31, 2013	127,815	$ 41,665	49,800	47,554	(4,894)	(6,310)
Increase (Decrease) in Stockholders' Equity
Net income	14,608			14,608
Other comprehensive income (loss)	3,227				3,227
Dividends declared	(9,055)			(9,055)
Common shares issued for employee stock purchase plan (in shares)		2,720
Common shares issued for employee stock purchase plan	119	$ 23	96
Purchase of treasury stock	(747)					(747)
Balance (in shares) at Dec. 31, 2014		5,002,649
Balance at Dec. 31, 2014	135,967	$ 41,688	49,896	53,107	(1,667)	(7,057)
Increase (Decrease) in Stockholders' Equity
Net income	13,898			13,898
Other comprehensive income (loss)	(2,132)				(2,132)
Dividends declared	(8,967)			(8,967)
Common shares issued for employee stock purchase plan (in shares)		2,335
Common shares issued for employee stock purchase plan	116	$ 20	96
Purchase of treasury stock	(2,603)					(2,603)
Balance (in shares) at Dec. 31, 2015		5,004,984
Balance at Dec. 31, 2015	$ 136,279	$ 41,708	$ 49,992	$ 58,038	$ (3,799)	$ (9,660)