Segment and Related Information - Narrative (Details)
|
6 Months Ended |
|
Jun. 30, 2019
office
banking_office
segment
subsidiary_bank
|
|---|
| Segment Reporting Information [Line Items] |
|
| Number of reportable segments | segment |
3
|
| Nature of operations, number of subsidiary banks | subsidiary_bank |
4
|
| Tompkins, Cayuga, Cortland and Schuyler Counties, New York |
|
| Segment Reporting Information [Line Items] |
|
| Nature of operations, number of banking offices |
14
|
| Wyoming, Livingston, Genessee, Orleans and Monroe, New York |
|
| Segment Reporting Information [Line Items] |
|
| Nature of operations, number of banking offices |
18
|
| 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
|
| Tompkins Insurance Agencies Inc |
|
| Segment Reporting Information [Line Items] |
|
| Noncontrolling interest, ownership percentage by parent |
100.00%
|