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, 2017		$ 149,813	$ 53	$ 45,967	$ 128,453	$ (14,320)	$ (10,340)
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Net income		13,896			13,896
Other comprehensive loss		(4,745)					(4,745)
Restricted stock awards		301		301
Restricted stock units for directors' deferred compensation plan		57		57
Cash dividends declared		(3,735)			(3,735)
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 shares of treasury stock for deferred directors' compensation		218		(722)		940
Sale of treasury stock	[1]	466		212		254
Ending balances at Sep. 30, 2018		156,499	53	46,006	138,654	(12,927)	(15,287)
Beginning balances at Jun. 30, 2018		151,780	53	45,873	132,973	(12,998)	(14,121)
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Net income		6,930			6,930
Other comprehensive loss		(1,166)					(1,166)
Restricted stock awards		69		69
Restricted stock units for directors' deferred compensation plan		10		10
Cash dividends declared		(1,249)			(1,249)
Sale of treasury stock	[2]	125		54		71
Ending balances at Sep. 30, 2018		156,499	53	46,006	138,654	(12,927)	(15,287)
Beginning balances at Dec. 31, 2018		165,029	53	45,820	143,129	(12,562)	(11,411)
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Net income		11,405			11,405
Other comprehensive loss		8,135					8,135
Restricted stock awards		296		296
Restricted stock units for directors' deferred compensation plan		31		31
Distribution of shares of treasury stock grants for employee restricted stock awards		11				11
Cash dividends declared		(3,775)			(3,775)
Distribution of treasury stock for directors' compensation		357		139		218
Distribution of shares of treasury stock for employee stock compensation		100		39		61
Distribution of shares of treasury stock for deferred directors' compensation		13		(52)		65
Repurchase of common stock		(13)				(13)
Sale of treasury stock	[1]	455		191		264
Ending balances at Sep. 30, 2019		182,044	53	46,464	150,759	(11,956)	(3,276)
Beginning balances at Jun. 30, 2019		178,387	53	46,284	150,063	(12,062)	(5,951)
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Net income		1,956			1,956
Other comprehensive loss		2,675					2,675
Restricted stock awards		97		97
Restricted stock units for directors' deferred compensation plan		10		10
Cash dividends declared		(1,260)			(1,260)
Sale of treasury stock	[2]	179		73		106
Ending balances at Sep. 30, 2019		$ 182,044	$ 53	$ 46,464	$ 150,759	$ (11,956)	$ (3,276)

[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.