Condensed Parent Company Only Financial Statements - Condensed Statements of Condition (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
ASSETS
Investment in subsidiaries, at equity	$ 1,400	$ 1,700
Total Assets	6,758,436	6,648,290	$ 6,236,756
Liabilities and Shareholders’ Equity
Trust preferred debentures issued to non-consolidated subsidiary	16,863	16,691
Other liabilities	73,826	70,671
Tompkins Financial Corporation Shareholders’ Equity	619,459	574,780
Total Liabilities and Equity	6,758,436	6,648,290
Tompkins (the Parent Company)
ASSETS
Cash	6,235	3,326
Investment in subsidiaries, at equity	625,193	586,976
Other	9,416	10,686
Total Assets	640,844	600,988
Liabilities and Shareholders’ Equity
Borrowings	4,000	9,000
Trust preferred debentures issued to non-consolidated subsidiary	16,863	16,691
Other liabilities	522	517
Tompkins Financial Corporation Shareholders’ Equity	619,459	574,780
Total Liabilities and Equity	$ 640,844	$ 600,988