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 balance 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 common stock		(61)				(61)
Forfeiture of restricted stock awards		0		43		(43)
Reclassification of stranded tax effects in AOCI		0			1,837		(1,837)
Ending balance at Dec. 31, 2017		149,813	53	45,967	128,453	(14,320)	(10,340)
Increase (Decrease) in Shareholders' Equity [Roll Forward]
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 common stock		(112)				(112)
Ending balance at Dec. 31, 2018		165,029	53	45,820	143,129	(12,562)	(11,411)
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Net income		15,609			15,609
Other comprehensive income (loss)		5,612					5,612
Restricted stock awards		503		503
Distribution of treasury stock for directors' deferred compensation plan		13		(52)		65
Distribution of shares of treasury stock granted for employee restricted stock awards, net		0		(353)		353
Restricted stock units for directors' deferred compensation plan		42		42
Cash dividends declared		(5,037)			(5,037)
Distribution of shares of treasury stock for directors' compensation		356		139		217
Distribution of shares of treasury stock for employee compensation		100		39		61
Sale of shares of treasury stock	[1]	585		244		341
Repurchase of common stock		(185)				(185)
Ending balance at Dec. 31, 2019		$ 182,627	$ 53	$ 46,382	$ 153,701	$ (11,710)	$ (5,799)

[1] 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.