CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	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	21,072			21,040			32
Other comprehensive income	12,215				12,215
Total Comprehensive Income	33,287
Cash dividends	(7,657)			(7,657)
Net exercise of stock options	(219)		(219)
Stock-based compensation expense	985		985
Directors deferred compensation plan	0		(116)			116
Restricted stock activity	0
Balances at Ending at Mar. 31, 2019	647,267	1,535	367,245	332,779	(50,950)	(4,786)	1,444
Balances at Beginning at Dec. 31, 2019	663,054	1,501	338,507	370,477	(43,564)	(5,279)	1,412
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to noncontrolling interests and Tompkins Financial Corporation	7,986			7,949			37
Other comprehensive income	22,293				22,293
Total Comprehensive Income	30,279
Cash dividends	(7,789)			(7,789)
Net exercise of stock options	(209)		(209)
Common stock repurchased and returned to unissued status	(5,620)	(7)	(5,613)
Stock-based compensation expense	1,180		1,180
Directors deferred compensation plan	0		(203)			203
Restricted stock activity	0
Partial repurchase of noncontrolling interest	(5)						(5)
Balances at Ending at Mar. 31, 2020	$ 682,597	$ 1,494	$ 333,662	$ 372,344	$ (21,271)	$ (5,076)	$ 1,444