CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income attributable to noncontrolling interests and Tompkins Financial Corporation	$ 85,156	$ 89,391	$ 77,742
Available-for-sale debt securities:
Change in net unrealized gain (loss) during the period	(173,240)	(34,961)	16,894
Reclassification adjustment for net realized (gain) loss on sale included in available-for-sale debt securities	8,997	(208)	(324)
Employee benefit plans:
Net retirement plan gain (loss)	9,634	8,898	(7,028)
Amortization of net retirement plan actuarial gain	1,706	2,228	1,786
Amortization of net retirement plan prior service cost	164	167	162
Other comprehensive (loss) income	(152,739)	(23,876)	11,490
Subtotal comprehensive (loss) income attributable to noncontrolling interests and Tompkins Financial Corporation	(67,583)	65,515	89,232
Less: Total comprehensive income attributable to noncontrolling interests	(126)	(127)	(154)
Total comprehensive (loss) income attributable to Tompkins Financial Corporation	$ (67,709)	$ 65,388	$ 89,078