CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
OPERATING ACTIVITIES
Net income attributable to Tompkins Financial Corporation	$ 25,626	$ 7,949
Adjustments to reconcile net income to net cash provided by operating activities:
(Reversal of provision) provision for credit loss expense	(2,510)	16,294
Depreciation and amortization of premises, equipment, and software	2,506	2,554
Amortization of intangible assets	330	374
Earnings from corporate owned life insurance	(541)	(324)
Net amortization on securities	3,481	1,937
Amortization/accretion related to purchase accounting	(299)	(372)
Net gain on securities transactions	(317)	(443)
Net gain on sale of loans originated for sale	(429)	(176)
Proceeds from sale of loans originated for sale	10,897	4,260
Loans originated for sale	(6,425)	(4,514)
Net gain on sale of bank premises and equipment	0	(3)
Net excess tax benefit from stock based compensation	85	118
Stock-based compensation expense	1,175	1,180
Increase in accrued interest receivable	559	1,286
Decrease in accrued interest payable	(121)	(242)
Other, net	(3,761)	(5,735)
Net Cash Provided by Operating Activities	30,256	24,143
INVESTING ACTIVITIES
Proceeds from maturities, calls and principal paydowns of available-for-sale debt securities	36,723	156,834
Proceeds from sales of available-for-sale debt securities	132,203	42,584
Purchases of available-for-sale debt securities	(513,468)	(226,103)
Net increase in loans	(36,139)	(20,879)
Proceeds from sale/redemptions of Federal Home Loan Bank stock	0	34,088
Purchases of Federal Home Loan Bank and other stock	0	(24,605)
Proceeds from sale of bank premises and equipment	31	4
Purchases of bank premises, equipment and software	(811)	(909)
Redemption of corporate owned life insurance	168	446
Other, net	124	102
Net Cash (Used in) Provided by Investing Activities	(381,169)	(38,438)
FINANCING ACTIVITIES
Net increase in demand, money market, and savings deposits	505,231	162,523
Net increase in time deposits	3,703	34,141
Net (decrease) increase in Federal funds purchased and securities sold under agreements to repurchase	(18,349)	8,647
Increase in other borrowings	0	74,583
Repayment of other borrowings	0	(274,700)
Cash dividends	(8,049)	(7,789)
Repurchase of common stock	(1,508)	(5,620)
Net proceeds from exercise of stock options	(152)	(209)
Net Cash Provided by (Used in) Financing Activities	480,876	(8,424)
Net Increase (Decrease) in Cash and Cash Equivalents	129,963	(22,719)
Cash and cash equivalents at beginning of period	388,462	137,982
Total Cash and Cash Equivalents at End of Period	518,425	115,263
Supplemental Information:
Cash paid during the year for  - Interest	4,984	10,694
Cash paid during the year for  - Taxes	933	1,214
Transfer of loans to other real estate owned	0	104
Initial recognition of operating lease right-of-use assets	0	0
Initial recognition of operating lease liabilities	0	0
Right-of-use assets obtained in exchange for new lease liabilities	$ 21	$ 17