Segment and Related Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Interest income	$ 45,960	$ 33,541	$ 90,417	$ 66,669
Interest expense	6,134	5,431	12,385	11,118
Net interest income	39,826	28,110	78,032	55,551
Provision for loan and lease losses	2,489	1,011	3,527	2,136
Noninterest income	16,541	12,766	33,931	24,428
Noninterest expense	37,777	26,855	75,298	53,226
Income before income tax expense	16,101	13,010	33,138	24,617
Income tax expense	5,061	4,151	10,557	7,912
Net Income attributable to noncontrolling interests and Tompkins Financial Corporation	11,040	8,859	22,581	16,705
Less: Net income attributable to noncontrolling interests	33	33	65	65
Net Income attributable to Tompkins Financial Corporation	11,007	8,826	22,516	16,640
Depreciation and amortization	1,446	1,207	2,890	2,416
Assets	4,931,883	3,482,669	4,931,883	3,482,669	4,837,197
Goodwill	92,140	44,891	92,140	44,891	92,305
Other intangibles, net	17,400	3,761	17,400	3,761	18,643
Net loans and leases	3,029,725	1,992,816	3,029,725	1,992,816	2,929,967
Deposits	3,912,910	2,765,093	3,912,910	2,765,093	3,950,169
Total Equity	431,894	353,700	431,894	353,700	441,360	299,143
Banking
Segment Reporting Information [Line Items]
Interest income	45,911	33,475	90,312	66,545
Interest expense	6,136	5,433	12,388	11,122
Net interest income	39,775	28,042	77,924	55,423
Provision for loan and lease losses	2,489	1,011	3,527	2,136
Noninterest income	5,818	5,773	12,455	10,614
Noninterest expense	29,602	21,329	59,009	42,019
Income before income tax expense	13,502	11,475	27,843	21,882
Income tax expense	4,107	3,597	8,574	6,929
Net Income attributable to noncontrolling interests and Tompkins Financial Corporation	9,395	7,878	19,269	14,953
Less: Net income attributable to noncontrolling interests	33	33	65	65
Net Income attributable to Tompkins Financial Corporation	9,362	7,845	19,204	14,888
Depreciation and amortization	1,359	1,130	2,711	2,260
Assets	4,892,300	3,455,487	4,892,300	3,455,487
Goodwill	64,500	23,600	64,500	23,600
Other intangibles, net	11,450	2,232	11,450	2,232
Net loans and leases	3,029,725	1,992,816	3,029,725	1,992,816
Deposits	3,921,307	2,768,691	3,921,307	2,768,691
Total Equity	395,147	330,961	395,147	330,961
Insurance
Segment Reporting Information [Line Items]
Interest income	2	2	4	4
Interest expense	0	0	0	0
Net interest income	2	2	4	4
Provision for loan and lease losses	0	0	0	0
Noninterest income	7,229	3,588	14,294	7,081
Noninterest expense	5,491	2,729	11,057	5,518
Income before income tax expense	1,740	861	3,241	1,567
Income tax expense	665	341	1,290	618
Net Income attributable to noncontrolling interests and Tompkins Financial Corporation	1,075	520	1,951	949
Less: Net income attributable to noncontrolling interests	0	0	0	0
Net Income attributable to Tompkins Financial Corporation	1,075	520	1,951	949
Depreciation and amortization	53	41	109	84
Assets	35,356	19,445	35,356	19,445
Goodwill	19,559	13,279	19,559	13,279
Other intangibles, net	5,313	1,068	5,313	1,068
Net loans and leases	0	0	0	0
Deposits	0	0	0	0
Total Equity	25,698	14,016	25,698	14,016
Wealth Management
Segment Reporting Information [Line Items]
Interest income	49	66	104	124
Interest expense	0	0	0	0
Net interest income	49	66	104	124
Provision for loan and lease losses	0	0	0	0
Noninterest income	3,746	3,730	7,936	7,418
Noninterest expense	2,936	3,122	5,986	6,374
Income before income tax expense	859	674	2,054	1,168
Income tax expense	289	213	693	365
Net Income attributable to noncontrolling interests and Tompkins Financial Corporation	570	461	1,361	803
Less: Net income attributable to noncontrolling interests	0	0	0	0
Net Income attributable to Tompkins Financial Corporation	570	461	1,361	803
Depreciation and amortization	34	36	70	72
Assets	12,857	11,425	12,857	11,425
Goodwill	8,081	8,012	8,081	8,012
Other intangibles, net	637	461	637	461
Net loans and leases	0	0	0	0
Deposits	0	0	0	0
Total Equity	11,049	8,723	11,049	8,723
Intercompany
Segment Reporting Information [Line Items]
Interest income	(2)	(2)	(3)	(4)
Interest expense	(2)	(2)	(3)	(4)
Net interest income	0	0	0	0
Provision for loan and lease losses	0	0	0	0
Noninterest income	(252)	(325)	(754)	(685)
Noninterest expense	(252)	(325)	(754)	(685)
Income before income tax expense	0	0	0	0
Income tax expense	0	0	0	0
Net Income attributable to noncontrolling interests and Tompkins Financial Corporation	0	0	0	0
Less: Net income attributable to noncontrolling interests	0	0	0	0
Net Income attributable to Tompkins Financial Corporation	0	0	0	0
Depreciation and amortization	0	0	0	0
Assets	(8,630)	(3,688)	(8,630)	(3,688)
Goodwill	0	0	0	0
Other intangibles, net	0	0	0	0
Net loans and leases	0	0	0	0
Deposits	(8,397)	(3,598)	(8,397)	(3,598)
Total Equity	$ 0	$ 0	$ 0	$ 0