CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands		Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
Beginning Balances at Dec. 31, 2015		$ 137,242	$ 53	$ 45,537	$ 118,973	$ (16,379)	$ (10,942)
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Net income		10,027			10,027
Other comprehensive income (loss)		188					188
Restricted stock awards		192		192
Distribution of treasury stock for directors' deferred compensation plan		3		(92)		95
Distribution of shares of treasury stock granted for employee restricted stock awards, net		0		(212)		212
Restricted stock units for directors' deferred compensation plan		97		97
Cash dividends declared		(4,889)			(4,889)
Distribution of shares of treasury stock for directors' compensation		262		19		243
Distribution of shares of treasury stock for employee compensation		210		15		195
Sale of shares of treasury stock	[1]	438		47		391
Repurchase of shares of common stock		(22)				(22)
Ending Balances at Dec. 31, 2016		143,748	53	45,603	124,111	(15,265)	(10,754)
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Net income		7,430			7,430
Other comprehensive income (loss)		2,251					2,251
Restricted stock awards		210		210
Distribution of treasury stock for directors' deferred compensation plan		11		(51)		62
Distribution of shares of treasury stock granted for employee restricted stock awards, net		0		(260)		260
Restricted stock units for directors' deferred compensation plan		98		98
Cash dividends declared		(4,925)			(4,925)
Distribution of shares of treasury stock for directors' compensation		269		68		201
Distribution of shares of treasury stock for employee compensation		200		50		150
Sale of shares of treasury stock	[1]	582		206		376
Repurchase of shares of common stock		(61)				(61)
Forfeiture of 1,139 shares of restricted stock awards		0		43		(43)
Reclassification of stranded tax effects in AOCI					1,837		(1,837)
Ending Balances at Dec. 31, 2017		149,813	53	45,967	128,453	(14,320)	(10,340)
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Cumulative effect of accounting change							(202)
Net income		19,626			19,626
Other comprehensive income (loss)		(869)					(869)
Restricted stock awards		405		405
Distribution of treasury stock for directors' deferred compensation plan		218		(722)		940
Distribution of shares of treasury stock granted for employee restricted stock awards, net		0		(370)		370
Restricted stock units for directors' deferred compensation plan		67		67
Cash dividends declared		(4,990)			(4,990)
Distribution of shares of treasury stock for directors' compensation		301		147		154
Distribution of shares of treasury stock for employee compensation		89		44		45
Sale of shares of treasury stock	[1]	643		282		361
Repurchase of shares of common stock		(112)				(112)
Ending Balances at Dec. 31, 2018		$ 165,029	$ 53	$ 45,820	$ 143,129	$ (12,562)	$ (11,411)

[1] (a) All treasury stock sales were completed at the prevailing market price with the Chemung Canal Trust Company Profit Sharing, Savings, and Investment Plan which is a defined contribution plan sponsored by the Bank.