CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Cumulative Effect, Adjustment	Common Stock	Additional Paid-in Capital	Retained Earnings	Retained Earnings Cumulative Effect, Adjustment	Accumulated Other Comprehensive (Loss) Income	Treasury Stock	Non- controlling Interests
Balances at beginning at Dec. 31, 2018	$ 620,871		$ 1,535	$ 366,595	$ 319,396		$ (63,165)	$ (4,902)	$ 1,412
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to noncontrolling interests and Tompkins Financial Corporation	81,845				81,718				127
Other comprehensive income (loss)	19,601						19,601
Subtotal comprehensive income attributable to noncontrolling interests and Tompkins Financial Corporation	101,446
Cash dividends	(30,637)				(30,637)
Net exercise of stock options	(992)		2	(994)
Common stock repurchased and returned to unissued status	(29,867)		(38)	(29,829)
Stock-based compensation expense	4,235			4,235
Directors deferred compensation plan	0			377				(377)
Restricted stock activity	(1,875)		2	(1,877)
Dividend to noncontrolling interests	$ (127)								(127)
Accounting Standards Update [Extensible Enumeration]	Adoption of Accounting Guidance ASU 2016-13
Balances at ending at Dec. 31, 2019	$ 663,054	$ 1,707	1,501	338,507	370,477	$ 1,707	(43,564)	(5,279)	1,412
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to noncontrolling interests and Tompkins Financial Corporation	77,742				77,588				154
Other comprehensive income (loss)	11,490						11,490
Subtotal comprehensive income attributable to noncontrolling interests and Tompkins Financial Corporation	89,232
Cash dividends	(31,359)				(31,359)
Net exercise of stock options	(253)		1	(254)
Common stock repurchased and returned to unissued status	(9,414)		(13)	(9,401)
Stock-based compensation expense	4,733			4,733
Directors deferred compensation plan	0			255				(255)
Restricted stock activity	(1,682)		4	(1,686)
Dividend to noncontrolling interests	(148)								(148)
Shares issued for dividend reinvestment plan	1,825		3	1,822
Partial repurchase of noncontrolling interest	(6)								(6)
Balances at ending at Dec. 31, 2020	717,689		1,496	333,976	418,413		(32,074)	(5,534)	1,412
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to noncontrolling interests and Tompkins Financial Corporation	89,391				89,264				127
Other comprehensive income (loss)	(23,876)						(23,876)
Subtotal comprehensive income attributable to noncontrolling interests and Tompkins Financial Corporation	65,515
Cash dividends	(32,415)				(32,415)
Net exercise of stock options	(803)		2	(805)
Common stock repurchased and returned to unissued status	(23,773)		(30)	(23,743)
Stock-based compensation expense	5,145			5,145
Directors deferred compensation plan	0			257				(257)
Restricted stock activity	(2,292)		2	(2,294)
Dividend to noncontrolling interests	(125)								(125)
Shares issued for dividend reinvestment plan	2			2
Partial repurchase of noncontrolling interest	(2)								(2)
Balances at ending at Dec. 31, 2021	$ 728,941		$ 1,470	$ 312,538	$ 475,262		$ (55,950)	$ (5,791)	$ 1,412