Segment and Related Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2015
Interest income	$ 53,621	$ 49,309
Interest expense	5,587	5,271
Net Interest Income	48,034	44,038
Provision for loan and lease losses	769	855
Noninterest income	17,240	17,503
Noninterest expense	41,368	39,506
Income Before Income Tax Expense	23,137	21,180
Income tax expense	7,388	6,896
Net Income attributable to noncontrolling interests and Tompkins Financial Corporation	15,749	14,284
Less: Net income attributable to noncontrolling interests	32	33
Net Income Attributable to Tompkins Financial Corporation	15,717	14,251
Depreciation and amortization	1,787	1,685
Assets	6,280,047	5,764,971	$ 6,236,756
Goodwill	92,291	92,617	92,623
Other intangibles, net	10,767	13,233	11,349
Net loans and leases	4,261,627	3,788,383	4,222,278
Deposits	4,850,585	4,555,228	4,625,139
Total Equity	563,518	539,893	$ 549,405	$ 516,466
Intercompany
Interest income	0	0
Interest expense	0	0
Net Interest Income	0	0
Provision for loan and lease losses	0	0
Noninterest income	(389)	(278)
Noninterest expense	(389)	(278)
Income Before Income Tax Expense	0	0
Income tax expense	0	0
Net Income attributable to noncontrolling interests and Tompkins Financial Corporation	0	0
Less: Net income attributable to noncontrolling interests	0	0
Net Income Attributable to Tompkins Financial Corporation	0	0
Depreciation and amortization	0	0
Assets	(10,062)	(8,905)
Goodwill	0	0
Other intangibles, net	0	0
Net loans and leases	0	0
Deposits	(10,040)	(8,723)
Total Equity	0	0
Operating Segments | Banking
Interest income	53,621	49,309
Interest expense	5,587	5,271
Net Interest Income	48,034	44,038
Provision for loan and lease losses	769	855
Noninterest income	6,403	6,272
Noninterest expense	32,488	30,374
Income Before Income Tax Expense	21,180	19,081
Income tax expense	6,672	6,123
Net Income attributable to noncontrolling interests and Tompkins Financial Corporation	14,508	12,958
Less: Net income attributable to noncontrolling interests	32	33
Net Income Attributable to Tompkins Financial Corporation	14,476	12,925
Depreciation and amortization	1,691	1,575
Assets	6,235,516	5,719,963
Goodwill	64,370	64,370
Other intangibles, net	6,107	7,472
Net loans and leases	4,261,627	3,788,383
Deposits	4,860,625	4,563,951
Total Equity	519,723	497,519
Operating Segments | Insurance
Interest income	0	0
Interest expense	0	0
Net Interest Income	0	0
Provision for loan and lease losses	0	0
Noninterest income	7,316	7,599
Noninterest expense	6,080	6,339
Income Before Income Tax Expense	1,236	1,260
Income tax expense	474	502
Net Income attributable to noncontrolling interests and Tompkins Financial Corporation	762	758
Less: Net income attributable to noncontrolling interests	0	0
Net Income Attributable to Tompkins Financial Corporation	762	758
Depreciation and amortization	82	91
Assets	39,915	39,825
Goodwill	19,710	20,036
Other intangibles, net	4,324	5,344
Net loans and leases	0	0
Deposits	0	0
Total Equity	31,148	30,757
Operating Segments | Wealth Management
Interest income	0	0
Interest expense	0	0
Net Interest Income	0	0
Provision for loan and lease losses	0	0
Noninterest income	3,910	3,910
Noninterest expense	3,189	3,071
Income Before Income Tax Expense	721	839
Income tax expense	242	271
Net Income attributable to noncontrolling interests and Tompkins Financial Corporation	479	568
Less: Net income attributable to noncontrolling interests	0	0
Net Income Attributable to Tompkins Financial Corporation	479	568
Depreciation and amortization	14	19
Assets	14,678	14,088
Goodwill	8,211	8,211
Other intangibles, net	336	417
Net loans and leases	0	0
Deposits	0	0
Total Equity	$ 12,647	$ 11,617