CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
OPERATING ACTIVITIES
Net income attributable to Tompkins Financial Corporation	$ 69,799	$ 53,610
Adjustments to reconcile net income to net cash provided by operating activities:
(Credit) provision for credit loss expense	(6,133)	17,418
Depreciation and amortization of premises, equipment, and software	7,696	7,654
Amortization of intangible assets	988	1,120
Earnings from corporate owned life insurance	(1,478)	(1,617)
Net amortization on securities	9,360	7,233
Amortization/accretion related to purchase accounting	1,187	(743)
Net gain on securities transactions	(257)	(446)
Penalties on prepayment of FHLB borrowings	2,929	0
Net gain on sale of loans originated for sale	(878)	(1,245)
Proceeds from sale of loans originated for sale	28,623	36,568
Loans originated for sale	(23,378)	(38,484)
Net loss (gain) on sale of bank premises and equipment	11	(3)
Net excess tax benefit from stock based compensation	346	118
Stock-based compensation expense	3,845	3,372
Decrease (increase) in accrued interest receivable	8,675	(18,919)
Decrease in accrued interest payable	(827)	(785)
Other, net	(9,154)	(3,535)
Net Cash Provided by Operating Activities	91,354	61,316
INVESTING ACTIVITIES
Proceeds from maturities, calls and principal paydowns of available-for-sale debt securities	377,593	405,886
Proceeds from sales of available-for-sale debt securities	142,679	42,333
Purchases of available-for-sale debt securities	(1,002,004)	(799,039)
Purchases of held-to-maturity securities	(269,225)	0
Net decrease (increase) in loans	160,532	(478,455)
Proceeds from sale/redemptions of Federal Home Loan Bank stock	9,182	41,169
Purchases of Federal Home Loan Bank and other stock	(3,166)	(25,393)
Proceeds from sale of bank premises and equipment	63	4
Purchases of bank premises, equipment and software	(3,315)	(2,894)
Redemption of corporate owned life insurance	169	446
Other, net	124	398
Net Cash Used in Investing Activities	(587,368)	(815,545)
FINANCING ACTIVITIES
Net increase in demand, money market, and savings deposits	723,881	1,356,930
Net (decrease) increase in time deposits	(70,358)	31,856
Net decrease in Federal funds purchased and securities sold under agreements to repurchase	6,645	3,227
Increase in other borrowings	0	74,583
Repayment of other borrowings	(157,929)	(447,683)
Redemption of trust preferred debentures	(15,150)	0
Cash dividends	(24,060)	(23,296)
Repurchase of common stock	(21,177)	(5,620)
Shares issued for dividend reinvestment plan	2	1,529
Net shares issued related to restricted stock awards	(122)	(292)
Net proceeds from exercise of stock options	(693)	(248)
Net Cash Provided by Financing Activities	441,039	990,986
Net (Decrease) Increase in Cash and Cash Equivalents	(54,975)	236,757
Cash and cash equivalents at beginning of period	388,462	137,982
Total Cash and Cash Equivalents at End of Period	333,487	374,739
Supplemental Information:
Cash paid during the year for  - Interest	15,935	24,626
Cash paid during the year for  - Taxes	23,386	16,243
Transfer of loans to other real estate owned	46	192
Initial recognition of operating lease right-of-use assets	1,072	0
Initial recognition of operating lease liabilities	1,072	0
Right-of-use assets obtained in exchange for new lease liabilities	$ 1,204	$ 1,230