Condensed Parent Company Only Financial Statements - Condensed Statements of Condition (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Assets
Investment in subsidiaries	$ 671	$ 485
Total Assets	8,109,080	7,819,749	$ 7,670,686
Liabilities and Shareholders’ Equity
Other liabilities	96,548	96,872
Tompkins Financial Corporation Shareholders’ Equity	713,444	668,522
Total Liabilities and Equity	8,109,080	7,819,749
Tompkins (the Parent Company)
Assets
Cash	23,866	10,710
Investment in subsidiaries	689,485	650,595
Other	1,272	8,455
Total Assets	714,623	669,760
Liabilities and Shareholders’ Equity
Other liabilities	1,179	1,238
Tompkins Financial Corporation Shareholders’ Equity	713,444	668,522
Total Liabilities and Equity	$ 714,623	$ 669,760