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Segment and Related Information - Schedule of Segment Information (Details) - USD ($) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2017 | Dec. 31, 2016
Segment Reporting Information [Line Items] |  |  |  |
Interest income | $ 60,140 | $ 53,621 |  |
Interest expense | 7,453 | 5,587 |  |
Net Interest Income | 52,687 | 48,034 |  |
Provision for loan and lease losses | 567 | 769 |  |
Noninterest income | 17,830 | 17,240 |  |
Noninterest expense | 43,721 | 41,368 |  |
Income Before Income Tax Expense | 26,229 | 23,137 |  |
Income tax expense | 5,761 | 7,388 |  |
Net Income attributable to noncontrolling interests and Tompkins Financial Corporation | 20,468 | 15,749 |  |
Less: Net income attributable to noncontrolling interests | 32 | 32 |  |
Net Income Attributable to Tompkins Financial Corporation | 20,436 | 15,717 |  |
Depreciation and amortization | 2,473 | 1,787 |  |
Assets | 6,648,128 | 6,280,047 | $ 6,648,290 |
Goodwill | 92,291 | 92,291 | 92,291 |
Other intangibles, net | 8,791 | 10,767 | 9,263 |
Net loans and leases | 4,664,635 | 4,261,627 | 4,629,349 |
Deposits | 4,929,903 | 4,850,585 | 4,837,807 |
Total Equity | 579,411 | 563,518 | $ 576,202 | $ 549,405
Operating Segments | Banking |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Interest income | 60,140 | 53,621 |  |
Interest expense | 7,454 | 5,587 |  |
Net Interest Income | 52,686 | 48,034 |  |
Provision for loan and lease losses | 567 | 769 |  |
Noninterest income | 6,411 | 6,403 |  |
Noninterest expense | 34,757 | 32,488 |  |
Income Before Income Tax Expense | 23,773 | 21,180 |  |
Income tax expense | 5,130 | 6,672 |  |
Net Income attributable to noncontrolling interests and Tompkins Financial Corporation | 18,643 | 14,508 |  |
Less: Net income attributable to noncontrolling interests | 32 | 32 |  |
Net Income Attributable to Tompkins Financial Corporation | 18,611 | 14,476 |  |
Depreciation and amortization | 2,399 | 1,691 |  |
Assets | 6,602,289 | 6,235,516 |  |
Goodwill | 64,370 | 64,370 |  |
Other intangibles, net | 4,871 | 6,107 |  |
Net loans and leases | 4,664,635 | 4,261,627 |  |
Deposits | 4,942,298 | 4,860,625 |  |
Total Equity | 530,536 | 519,723 |  |
Operating Segments | Insurance |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Interest income | 1 | 0 |  |
Interest expense | 0 | 0 |  |
Net Interest Income | 1 | 0 |  |
Provision for loan and lease losses | 0 | 0 |  |
Noninterest income | 7,488 | 7,316 |  |
Noninterest expense | 6,239 | 6,080 |  |
Income Before Income Tax Expense | 1,250 | 1,236 |  |
Income tax expense | 350 | 474 |  |
Net Income attributable to noncontrolling interests and Tompkins Financial Corporation | 900 | 762 |  |
Less: Net income attributable to noncontrolling interests | 0 | 0 |  |
Net Income Attributable to Tompkins Financial Corporation | 900 | 762 |  |
Depreciation and amortization | 61 | 82 |  |
Assets | 41,046 | 39,915 |  |
Goodwill | 19,710 | 19,710 |  |
Other intangibles, net | 3,657 | 4,324 |  |
Net loans and leases | 0 | 0 |  |
Deposits | 0 | 0 |  |
Total Equity | 33,218 | 31,148 |  |
Operating Segments | Wealth Management |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Interest income | 0 | 0 |  |
Interest expense | 0 | 0 |  |
Net Interest Income | 0 | 0 |  |
Provision for loan and lease losses | 0 | 0 |  |
Noninterest income | 4,408 | 3,910 |  |
Noninterest expense | 3,202 | 3,189 |  |
Income Before Income Tax Expense | 1,206 | 721 |  |
Income tax expense | 281 | 242 |  |
Net Income attributable to noncontrolling interests and Tompkins Financial Corporation | 925 | 479 |  |
Less: Net income attributable to noncontrolling interests | 0 | 0 |  |
Net Income Attributable to Tompkins Financial Corporation | 925 | 479 |  |
Depreciation and amortization | 13 | 14 |  |
Assets | 17,434 | 14,678 |  |
Goodwill | 8,211 | 8,211 |  |
Other intangibles, net | 263 | 336 |  |
Net loans and leases | 0 | 0 |  |
Deposits | 0 | 0 |  |
Total Equity | 15,657 | 12,647 |  |
Intercompany |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Interest income | (1) | 0 |  |
Interest expense | (1) | 0 |  |
Net Interest Income | 0 | 0 |  |
Provision for loan and lease losses | 0 | 0 |  |
Noninterest income | (477) | (389) |  |
Noninterest expense | (477) | (389) |  |
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 | (12,641) | (10,062) |  |
Goodwill | 0 | 0 |  |
Other intangibles, net | 0 | 0 |  |
Net loans and leases | 0 | 0 |  |
Deposits | (12,395) | (10,040) |  |
Total Equity | $ 0 | $ 0 |  |

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