CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
OPERATING ACTIVITIES
Net income attributable to Tompkins Financial Corporation	$ 70,850	$ 9,505	$ 85,030
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit loss expense	6,611	4,339	2,789
Depreciation and amortization of premises, equipment, and software	10,143	11,399	10,684
Amortization of intangible assets	332	334	873
Earnings from corporate owned life insurance	(2,768)	(1,727)	(1,162)
Net amortization on securities	(1,123)	2,434	5,595
Amortization/accretion related to purchase accounting	(691)	(677)	(921)
Deferred income tax (benefit) expense	(3,082)	(434)	910
Net (gain) loss on securities transactions	(32)	69,973	634
Net gain on sale of loans originated for sale	(1,001)	(96)	(155)
Proceeds from sale of loans originated for sale	41,071	4,591	9,018
Loans originated for sale	(41,128)	(5,097)	(8,658)
Net gain on sale of bank premises and equipment	(218)	(55)	(105)
Net excess tax (expense) benefit from stock-based compensation	(134)	(229)	365
Stock-based compensation expense	4,631	4,100	4,343
Increase in accrued interest receivable	(2,716)	(1,242)	(2,268)
Increase in accrued interest payable	1,380	2,054	519
Other, net	12,841	(10,169)	(4,151)
Net Cash Provided by Operating Activities	94,966	89,003	103,340
INVESTING ACTIVITIES
Proceeds from maturities, calls and principal paydowns of available-for-sale debt securities	198,432	161,835	208,655
Proceeds from sales of available-for-sale debt securities	39,952	440,488	160,638
Purchases of available-for-sale debt securities	(55,913)	(391,488)	(154,820)
Purchases of held-to-maturity debt securities	0	0	(28,320)
Proceeds from sale of VISA Class B shares	0	0	11,407
Net increase in loans	(428,944)	(337,047)	(193,010)
Proceeds from sale/redemptions of Federal Home Loan Bank stock	114,015	116,198	81,402
Purchases of Federal Home Loan Bank and other stock	(122,551)	(132,197)	(88,126)
Proceeds from sale of bank premises and equipment	294	146	223
Purchases of bank premises, equipment and software	(6,209)	(6,762)	(8,168)
Purchase of corporate owned life insurance	(6,250)	0	0
Proceeds from redemption of corporate owned life insurance	17,994	1,872	2,106
Other, net	(1,261)	654	(431)
Net Cash (Used in) Provided by Investing Activities	(250,441)	(146,301)	(8,444)
FINANCING ACTIVITIES
Net increase (decrease) in demand, money market, and savings deposits	1,596	(569,050)	(180,877)
Net increase (decrease) in time deposits	70,784	367,070	(7,740)
Net decrease in Federal funds purchased and securities sold under agreements to repurchase	(13,960)	(5,282)	(10,509)
Increase in other borrowings	804,947	450,400	435,900
Repayment of other borrowings	(616,800)	(139,600)	(268,600)
Cash dividends	(35,049)	(34,512)	(33,565)
Common stock issued	170	0	0
Repurchase of common stock	0	(8,726)	(15,430)
Shares issued for employee stock ownership plan	0	0	2,951
Net shares issued related to restricted stock awards	(1,242)	(1,173)	(1,758)
Net proceeds from exercise of stock options	(115)	(124)	(538)
Net Cash Provided by (Used in) Financing Activities	210,331	59,003	(80,166)
Net Increase in Cash and Cash Equivalents	54,856	1,705	14,730
Cash and cash equivalents at beginning of period	79,542	77,837	63,107
Total Cash and Cash Equivalents at End of Period	134,398	79,542	77,837
Supplemental Cash Flow Information
Cash paid during the year for - Interest	135,513	86,258	21,047
Cash paid during the year for - Taxes	14,826	10,381	23,898
Transfer of loans to other real estate owned	14,314	131	351
Right-of-use assets obtained in exchange for new lease liabilities	$ 2,341	$ 1,655	$ 2,498