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Segment and Related Information - Narrative (Details) | 3 Months Ended
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Mar. 31, 2022 banking_Office segment office
Segment Reporting Information [Line Items] |
Number of reportable segments | segment | 3
Tompkins Insurance Agencies, Inc. |
Segment Reporting Information [Line Items] |
Noncontrolling interest, ownership percentage by parent | 100.00%
Tompkins, Cayuga, Cortland and Schuyler Counties, New York |
Segment Reporting Information [Line Items] |
Nature of operations, number of banking offices | 13
Wyoming, Livingston, Genessee, Orleans and Monroe, New York |
Segment Reporting Information [Line Items] |
Nature of operations, number of banking offices | 16
Putnam Country, Dutchess Country and Westchester, New York |
Segment Reporting Information [Line Items] |
Nature of operations, number of banking offices | 14
Berks, Montgomery, Philadelphia, Deleware and Schuylkill, Pennsylvania |
Segment Reporting Information [Line Items] |
Nature of operations, number of banking offices | 20
Western New York |
Segment Reporting Information [Line Items] |
Number of offices | office | 5

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- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8672-108599 + Details
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- Details
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- Details
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- Details
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