CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income (loss) attributable to noncontrolling interests and Tompkins Financial Corporation	$ 70,973	$ 9,629	$ 85,156
Available-for-sale debt securities:
Change in net unrealized loss during the period	(2,121)	26,430	(173,240)
Reclassification adjustment for net realized (gain) loss on sale of available-for-sale debt securities included in net income	(38)	52,838	8,997
Employee benefit plans:
Net retirement plan gain	7,832	3,410	9,634
Amortization of net retirement plan actuarial loss	700	843	1,706
Amortization of net retirement plan prior service cost	140	163	164
Other comprehensive income (loss)	6,513	83,684	(152,739)
Subtotal comprehensive income (loss) attributable to noncontrolling interests and Tompkins Financial Corporation	77,486	93,313	(67,583)
Less: Net income attributable to noncontrolling interests	123	124	126
Total comprehensive income (loss) attributable to Tompkins Financial Corporation	$ 77,363	$ 93,189	$ (67,709)