Trust Preferred Debentures (Details)
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1 Months Ended |
12 Months Ended |
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Jan. 31, 2017
USD ($)
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Apr. 10, 2009
USD ($)
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Jun. 26, 2003
USD ($)
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Sep. 26, 2002
USD ($)
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Aug. 31, 2003
USD ($)
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Dec. 31, 2017
USD ($)
subsidiary_trust
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| Debt Instrument [Line Items] |
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| Number of unconsolidated subsidiary trusts | subsidiary_trust |
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3
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| Tompkins Capital Trust I |
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| Debt Instrument [Line Items] |
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| Par Amount |
$ 20,500,000.0
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| Redemption price, percentage of liquidation amount |
100.00%
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| Trust preferred securities liquidation amount, per security |
$ 1,000
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$ 1,000
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| Trust preferred securities and debentures maturity |
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30 years
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| Fixed interest rate |
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7.00%
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| Waiting period until redemption (no earlier than) (in years) |
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5 years
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| Sleepy Hollow Capital Trust I |
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| Debt Instrument [Line Items] |
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| Par Amount |
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$ 4,000,000
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$ 4,000,000.0
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| Interest rate, basis spread |
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3.05%
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| Common equity securities issued to the Company |
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$ 100,000
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| Sleepy Hollow Capital Trust I | LIBOR |
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| Debt Instrument [Line Items] |
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| Interest rate, basis spread |
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3.05%
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| Leesport Capital Trust II |
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| Debt Instrument [Line Items] |
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| Par Amount |
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$ 10,000,000
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$ 10,000,000.0
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| Interest rate, basis spread |
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3.45%
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| Leesport Capital Trust II | LIBOR |
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| Debt Instrument [Line Items] |
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| Interest rate, basis spread |
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3.45%
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| Madison Statutory Trust I |
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| Debt Instrument [Line Items] |
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| Par Amount |
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$ 5,000,000
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$ 5,000,000.0
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| Interest rate, basis spread |
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3.10%
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| Madison Statutory Trust I | LIBOR |
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| Debt Instrument [Line Items] |
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| Interest rate, basis spread |
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3.10%
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| Tompkins Capital Trust I | Unconsolidated subsidiary |
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| Debt Instrument [Line Items] |
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| Ownership percentage by parent |
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100.00%
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| Sleepy Hollow Capital Trust I | Unconsolidated subsidiary |
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| Debt Instrument [Line Items] |
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| Ownership percentage by parent |
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100.00%
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| Leesport Capital Trust II | Unconsolidated subsidiary |
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| Debt Instrument [Line Items] |
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| Ownership percentage by parent |
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100.00%
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| Madison Statutory Trust I | Unconsolidated subsidiary |
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| Debt Instrument [Line Items] |
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| Ownership percentage by parent |
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100.00%
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