CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
INTEREST AND DIVIDEND INCOME
Loans	$ 227,313	$ 226,723	$ 214,370
Due from banks	194	41	31
Available-for-sale securities	25,450	28,460
Available-for-sale securities			30,377
Held-to-maturity securities	0	3,151	3,437
Federal Home Loan Bank stock and Federal Reserve Bank stock	1,373	3,003	3,377
Total Interest and Dividend Income	254,330	261,378	251,592
INTEREST EXPENSE
Time certificates of deposits of $250,000 or more	3,175	3,095	1,712
Other deposits	16,789	27,809	14,883
Federal funds purchased and securities sold under agreements to repurchase	95	143	152
Trust preferred debentures	1,133	1,276	1,227
Other borrowings	7,799	18,427	21,818
Total Interest Expense	28,991	50,750	39,792
Net interest income	225,339	210,628	211,800
Less: Provision for Credit Loss Expense	16,151	1,366	3,942
Net Interest Income After Provision for Credit Loss Expense	209,188	209,262	207,858
NONINTEREST INCOME
Insurance commissions and fees	31,505	31,091	29,369
Investment services income	17,520	16,434	17,288
Service charges on deposit accounts	6,312	8,321	8,435
Card services income	9,263	10,526	9,693
Other income	8,817	8,416	13,130
Net gain (loss) on securities transactions	443	645	(466)
Total Noninterest Income	73,860	75,433	77,449
NONINTEREST EXPENSES
Salaries and wages	92,519	89,399	85,625
Other employee benefits	24,812	23,488	22,090
Net occupancy expense of premises	12,930	13,210	13,309
Furniture and fixture expense	7,846	7,815	7,351
Amortization of intangible assets	1,484	1,673	1,771
Other operating expenses	45,791	46,249	50,921
Total Noninterest Expenses	185,382	181,834	181,067
Income Before Income Tax Expense	97,666	102,861	104,240
Income Tax Expense	19,924	21,016	21,805
Net Income Attributable to Noncontrolling Interests and Tompkins Financial Corporation	77,742	81,845	82,435
Less: Net income attributable to noncontrolling interests	154	127	127
Net Income Attributable to Tompkins Financial Corporation	$ 77,588	$ 81,718	$ 82,308
Basic Earnings Per Share (in dollars per share)	$ 5.22	$ 5.39	$ 5.39
Diluted Earnings Per Share (in dollars per share)	$ 5.20	$ 5.37	$ 5.35