CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands		Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss
Beginning balance at Dec. 31, 2020		$ 199,699	$ 53	$ 46,764	$ 168,006	$ (17,525)	$ 2,401
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Net income		13,325			13,325
Other comprehensive income		(6,259)					(6,259)
Restricted stock awards		223		223
Restricted stock units for directors' deferred compensation plan		9		9
Cash dividends declared		(2,658)			(2,658)
Distribution of shares of treasury stock for directors' compensation		317		64		253
Distribution of shares of treasury stock for employee compensation		132		27		105
Distribution of shares of treasury stock for deferred directors' compensation		3		(72)		75
Repurchase of shares of common stock		(1,046)				(1,046)
Sale of shares of treasury stock	[1]	232		66		166
Ending balance at Jun. 30, 2021		203,977	53	47,081	178,673	(17,972)	(3,858)
Beginning balance at Mar. 31, 2021		194,784	53	47,025	173,325	(17,867)	(7,752)
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Net income		6,795			6,795
Other comprehensive income		3,894					3,894
Restricted stock awards		87		87
Restricted stock units for directors' deferred compensation plan		4		4
Cash dividends declared		(1,447)			(1,447)
Distribution of shares of treasury stock for directors' compensation		3		(72)		75
Repurchase of shares of common stock		(245)				(245)
Sale of shares of treasury stock	[1]	102		37		65
Ending balance at Jun. 30, 2021		203,977	53	47,081	178,673	(17,972)	(3,858)
Beginning balance at Dec. 31, 2021		211,455	53	46,901	188,877	(17,846)	(6,530)
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Net income		14,891			14,891
Other comprehensive income		(48,815)					(48,815)
Restricted stock awards		333		333
Restricted stock units for directors' deferred compensation plan		100		100
Cash dividends declared		(2,898)			(2,898)
Distribution of shares of treasury stock grants for employee restricted stock awards		0		(112)		112
Distribution of shares of treasury stock for directors' compensation		105		(139)		244
Repurchase of shares of common stock		(695)				(695)
Sale of shares of treasury stock	[1]	216		83		133
Forfeiture of 681 shares of restricted stock awards		(2)		30		(32)
Ending balance at Jun. 30, 2022		174,690	53	47,196	200,870	(18,084)	(55,345)
Beginning balance at Mar. 31, 2022		185,510	53	46,880	194,295	(18,113)	(37,605)
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Net income		8,024			8,024
Other comprehensive income		(17,740)					(17,740)
Restricted stock awards		154		154
Restricted stock units for directors' deferred compensation plan		95		95
Cash dividends declared		(1,449)			(1,449)
Sale of shares of treasury stock	[1]	98		37		61
Forfeiture of 681 shares of restricted stock awards		(2)		30		(32)
Ending balance at Jun. 30, 2022		$ 174,690	$ 53	$ 47,196	$ 200,870	$ (18,084)	$ (55,345)

[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.