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Derivative Instruments (Tables) | 12 Months Ended
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Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Fair Value Of Derivative Instruments | The following table summarizes the notional and fair value of these derivative instruments (in thousands):
| December 31, 2017 |  | December 31, 2016
| Notional Amount |  | Fair Value |  | Notional Amount |  | Fair Value
Non-hedging interest rate derivatives: |  |  |  |  |  |  |
Customer counterparties: |  |  |  |  |  |  |
Loan interest rate swap - assets | $ | 225,480 |  |  | $ | 4,877 |  |  | $ | 234,806 |  |  | $ | 7,352 |
Loan interest rate swap - liabilities | 314,450 |  |  | 9,513 |  |  | 207,201 |  |  | 8,111 |
Non-hedging interest rate derivatives: |  |  |  |  |  |  |
Financial institution counterparties: |  |  |  |  |  |  |
Loan interest rate swap - assets | 320,949 |  |  | 9,591 |  |  | 207,201 |  |  | 8,111 |
Loan interest rate swap - liabilities | 218,924 |  |  | 4,877 |  |  | 241,995 |  |  | 7,360 |
Derivatives designated as hedges of fair value: |  |  |  |  |  |  |
Financial institution counterparties: |  |  |  |  |  |  |
Loan interest rate swap - assets | 4,326 |  |  | 34 |  |  | — |  |  | — |
Loan interest rate swap - liabilities | — |  |  | — |  |  | 4,626 |  |  | 12 |
Change In Fair Value Of Derivative Instruments | The following table summarizes the change in fair value of these derivative instruments (in thousands):
| Year Ended December 31,
| 2017 | 2016 | 2015
Change in Fair Value Non-Hedging Interest Rate Derivatives: |  |  |
Other income - derivative assets | $ | (3,379 | ) | $ | 3,904 |  | $ | 1,030 |
Other income - derivative liabilities | 3,379 |  | (3,904 | ) | (1,030 | )
Other expense - derivative liabilities | 86 |  | (52 | ) | (61 | )
Change in Fair Value Hedging Interest Rate Derivatives: |  |  |
Hedged item - derivative asset | $ | 38 |  | (36 | ) | 25 |
Other income (expense) - derivative liability with financial institution counterparties | — |  | 13 |  | (12 | )
Other income (expense) - derivative asset with financial institution counterparties | 8 |  | — |  | — |
Offsetting Assets | Information about financial instruments that are eligible for offset in the consolidated balance sheet as of December 31, 2017 is presented in the following tables (in thousands):
|  |  |  | Gross Amounts |  |
|  |  |  | Not Offset in the Statement |  |
|  |  |  | of Financial Position |  |
|  |  |  |  |  | Total |
|  |  |  |  |  | of Gross |
|  |  |  |  |  | Amounts |
|  |  |  |  |  | Not Offset in |
|  |  |  |  |  | the Statement |
|  |  |  |  |  | of Financial |
|  |  |  |  |  | Position |
|  |  |  | Netting |  | Including |
|  | Gross | Net Amounts | Adjustment |  | Applicable |
|  | Amounts | of Assets | per |  | Netting |
| Gross | Offset in the | presented in | Applicable |  | Agreement |
| Amounts of | Statement of | the Statement | Master | Fair Value | and Fair |
| Recognized | Financial | of Financial | Netting | of Financial | Value of |
Description | Assets | Position | Position | Arrangements | Collateral | Collateral | Net Amount
| (a) | (b) | (c)=(a)-(b) |  |  | (d) | (c)-(d)*
Non-hedging derivative assets: |  |  |  |  |  |
Interest rate swap agreements - customer counterparties | $ | 4,877 |  | $ | — |  | $ | 4,877 |  | $ | — |  | $ | 4,877 |  | $ | 4,877 |  | $ | — |
Interest rate swap agreements - financial institution counterparties | 9,591 |  | — |  | 9,591 |  | — |  | — |  | — |  | 9,591 |
Hedging derivative assets: |  |  |  |  |  |
Interest rate swap agreements - financial institution counterparties | $ | 34 |  | $ | — |  | $ | 34 |  | $ | — |  | $ | 56 |  | $ | 56 |  | $ | — |
Non-hedging derivative liabilities: |  |  |  |  |  |
Interest rate swap agreements - customer counterparties | $ | 9,513 |  | $ | — |  | $ | 9,513 |  | $ | — |  | $ | 9,513 |  | $ | 9,513 |  | $ | — |
Interest rate swap agreements -financial institution counterparties | $ | 4,877 |  | $ | — |  | $ | 4,877 |  | $ | — |  | $ | 15,661 |  | $ | 15,661 |  | $ | — |
* For instances where the fair value of financial collateral meets or exceeds the amounts presented in the Statement of Financial Position, a value of zero is displayed to represent full collateralization.
Offsetting Liabilities |
Non-hedging derivative liabilities: |  |  |  |  |  |
Interest rate swap agreements - customer counterparties | $ | 9,513 |  | $ | — |  | $ | 9,513 |  | $ | — |  | $ | 9,513 |  | $ | 9,513 |  | $ | — |
Interest rate swap agreements -financial institution counterparties | $ | 4,877 |  | $ | — |  | $ | 4,877 |  | $ | — |  | $ | 15,661 |  | $ | 15,661 |  | $ | — |
* For instances where the fair value of financial collateral meets or exceeds the amounts presented in the Statement of Financial Position, a value of zero is displayed to represent full collateralization.

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