CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands		Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss
Beginning 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		5,935			5,935
Other comprehensive income		3,782					3,782
Restricted stock awards		107		107
Restricted stock units for directors' deferred compensation plan		49		49
Cash dividends declared		(2,461)			(2,461)
Distribution of treasury stock for directors' compensation		269		68		201
Distribution of shares of treasury stock for employee stock compensation		200		50		150
Distribution of treasury stock for deferred directors' compensation		11		(51)		62
Sale of treasury stock	[1]	322		97		225
Forfeiture of 1,139 shares of restricted stock awards		0		43		(43)
Ending balances at Jun. 30, 2017		151,962	53	45,966	127,585	(14,670)	(6,972)
Beginning balances at Mar. 31, 2017							(8,756)
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Net income		2,956
Other comprehensive income		1,784					1,784
Ending balances at Jun. 30, 2017		151,962	53	45,966	127,585	(14,670)	(6,972)
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Cumulative effect of account change	[2]	(162)			40		(202)
Balances at January 1, 2018, as adjusted		149,651	53	45,967	128,493	(14,320)	(10,542)
Beginning balances at Dec. 31, 2017		149,813	53	45,967	128,453	(14,320)	(10,340)
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Net income		6,966			6,966
Other comprehensive income		(3,579)					(3,579)
Restricted stock awards		232		232
Restricted stock units for directors' deferred compensation plan		47		47
Cash dividends declared		(2,486)			(2,486)
Distribution of treasury stock for directors' compensation		301		147		154
Distribution of shares of treasury stock for employee stock compensation		89		44		45
Distribution of treasury stock for deferred directors' compensation		218		(722)		940
Sale of treasury stock	[1]	341		158		183
Ending balances at Jun. 30, 2018		151,780	53	45,873	132,973	(12,998)	(14,121)
Beginning balances at Mar. 31, 2018							(13,836)
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Net income		2,527
Other comprehensive income		(285)					(285)
Ending balances at Jun. 30, 2018		$ 151,780	$ 53	$ 45,873	$ 132,973	$ (12,998)	$ (14,121)

[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.

[2] Due to implementation of ASC 2016-01. See "Adoption of New Accounting Standards" discussion in Note 1.