CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income attributable to noncontrolling interests and Tompkins Financial Corporation	$ 7,986	$ 21,072
Available-for-sale debt securities:
Change in net unrealized gain/(loss) during the period	22,123	11,894
Reclassification adjustment for net realized gain on sale of available-for-sale debt securities included in net income	(324)	0
Employee benefit plans:
Amortization of net retirement plan actuarial loss	454	318
Amortization of net retirement plan prior service cost	40	3
Other comprehensive income	22,293	12,215
Total Comprehensive Income	30,279	33,287
Less: Net income attributable to noncontrolling interests	(37)	(32)
Total comprehensive income attributable to Tompkins Financial Corporation	$ 30,242	$ 33,255