Segment and Related Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2014
Interest income	$ 49,309	$ 46,228
Interest expense	5,271	5,000
Net interest income	44,038	41,228
Provision for loan and lease losses	855	209
Noninterest income	17,503	17,646
Noninterest expense	39,506	39,692
Income before income tax expense	21,180	18,973
Income tax expense	6,967	6,260
Net Income attributable to noncontrolling interests and Tompkins Financial Corporation	14,213	12,713
Less: Net income attributable to noncontrolling interests	33	33
Net income attributable to Tompkins Financial Corporation	14,180	12,680
Depreciation and amortization	1,685	1,568
Assets	5,764,971	5,357,533	$ 5,689,995
Goodwill	92,617	92,243	91,792
Other intangibles, net	13,233	14,110	12,448
Net loans and leases	3,788,383	3,398,072	3,740,038
Deposits	4,555,228	4,282,766	4,395,306
Total Equity	539,893	504,296	$ 516,466	$ 489,583
Banking [Member]
Interest income	49,309	46,192
Interest expense	5,271	5,000
Net interest income	44,038	41,192
Provision for loan and lease losses	855	209
Noninterest income	6,272	6,390
Noninterest expense	30,374	30,950
Income before income tax expense	19,081	16,423
Income tax expense	6,194	5,312
Net Income attributable to noncontrolling interests and Tompkins Financial Corporation	12,887	11,111
Less: Net income attributable to noncontrolling interests	33	33
Net income attributable to Tompkins Financial Corporation	12,854	11,078
Depreciation and amortization	1,575	1,444
Assets	5,719,963	5,315,921
Goodwill	64,370	64,500
Other intangibles, net	7,472	8,929
Net loans and leases	3,788,383	3,398,072
Deposits	4,563,951	4,289,693
Total Equity	497,519	468,128
Insurance [Member]
Interest income	0	1
Interest expense	0	0
Net interest income	0	1
Provision for loan and lease losses	0	0
Noninterest income	7,599	7,406
Noninterest expense	6,339	6,015
Income before income tax expense	1,260	1,392
Income tax expense	502	554
Net Income attributable to noncontrolling interests and Tompkins Financial Corporation	758	838
Less: Net income attributable to noncontrolling interests	0	0
Net income attributable to Tompkins Financial Corporation	758	838
Depreciation and amortization	91	92
Assets	39,825	36,283
Goodwill	20,036	19,662
Other intangibles, net	5,344	4,680
Net loans and leases	0	0
Deposits	0	0
Total Equity	30,757	26,763
Wealth Management [Member]
Interest income	0	35
Interest expense	0	0
Net interest income	0	35
Provision for loan and lease losses	0	0
Noninterest income	3,910	4,127
Noninterest expense	3,071	3,004
Income before income tax expense	839	1,158
Income tax expense	271	394
Net Income attributable to noncontrolling interests and Tompkins Financial Corporation	568	764
Less: Net income attributable to noncontrolling interests	0	0
Net income attributable to Tompkins Financial Corporation	568	764
Depreciation and amortization	19	32
Assets	14,088	12,402
Goodwill	8,211	8,081
Other intangibles, net	417	501
Net loans and leases	0	0
Deposits	0	0
Total Equity	11,617	9,405
Intercompany [Member]
Interest income	0	0
Interest expense	0	0
Net interest income	0	0
Provision for loan and lease losses	0	0
Noninterest income	(278)	(277)
Noninterest expense	(278)	(277)
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	(8,905)	(7,073)
Goodwill	0	0
Other intangibles, net	0	0
Net loans and leases	0	0
Deposits	(8,723)	(6,927)
Total Equity	$ 0	$ 0