Condensed Parent Company Only Financial Statements - Condensed Statement of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Condensed Income Statements, Captions [Line Items]
Interest expense	$ 21,043	$ 17,526	$ 28,991
Income tax benefit	(24,557)	(25,182)	(19,924)
Net Income Attributable to Tompkins Financial Corporation	85,030	89,264	77,588
Tompkins (the Parent Company)
Condensed Income Statements, Captions [Line Items]
Dividends received from subsidiaries	62,559	81,408	60,818
Other income	147	279	52
Total Operating Income	62,706	81,687	60,870
Interest expense	0	2,232	1,241
Other expenses	11,295	9,039	9,184
Total Operating Expenses	11,295	11,271	10,425
Earnings of Subsidiaries	51,411	70,416	50,445
Income tax benefit	2,841	2,068	2,160
Equity in undistributed earnings of subsidiaries	30,778	16,780	24,983
Net Income Attributable to Tompkins Financial Corporation	$ 85,030	$ 89,264	$ 77,588