CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income attributable to noncontrolling interests and Tompkins Financial Corporation	$ 89,391	$ 77,742	$ 81,845
Available-for-sale debt securities:
Change in net unrealized gain (loss) during the period	(34,961)	16,894	25,241
Unrealized gains on HTM securities transferred to AFS securities	0	0	2,852
Reclassification adjustment for net realized (gain) loss on sale included in available-for-sale debt securities	(208)	(324)	(465)
Employee benefit plans:
Net retirement plan gain (loss)	8,898	(7,028)	(7,642)
Net actuarial gain due to curtailment	0	0	(302)
Net retirement plan prior service (credit) cost	0	0	(1,373)
Amortization of net retirement plan actuarial gain	2,228	1,786	1,266
Amortization of net retirement plan prior service cost	167	162	24
Other comprehensive (loss) income	(23,876)	11,490	19,601
Subtotal comprehensive income attributable to noncontrolling interests and Tompkins Financial Corporation	65,515	89,232	101,446
Less: Total comprehensive income attributable to noncontrolling interests	(127)	(154)	(127)
Total comprehensive income attributable to Tompkins Financial Corporation	$ 65,388	$ 89,078	$ 101,319