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Derivative Instruments and Hedging Activities (Tables) | 12 Months Ended
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Dec. 31, 2017
Derivative Instruments and Hedging Activities [Abstract] |
Credit Value Adjustment Recorded Related to Notional Amount of Derivatives Outstanding and Notional Amount of Risk Participation Agreements | The following table depicts the fair value adjustment recorded related to the notional amount of derivatives outstanding as well as the notional amount of risk participation agreements:
|  | December 31, |
(In thousands) |  | 2017 |  |  | 2016 |
Derivatives Not Designated as Hedging Instruments: |  |  |  |  |  |
Fair value adjustment |  | $ | 210 |  |  | $ | 309 |
Notional amount: |  |  |  |  |  |  |  |
Interest rate derivatives |  |  | 481,185 |  |  |  | 371,101 |
Risk participation agreements |  |  | 35,628 |  |  |  | 11,421 |
Derivatives Designated as Hedging Instruments: |  |  |  |  |  |  |  |
Fair value adjustment - interest rate derivatives |  |  | 3,510 |  |  |  | 2,704 |
Notional amount - interest rate derivatives |  |  | 250,000 |  |  |  | 250,000 |
Gain or Loss Recognized in Income on Derivatives | The following table indicates the gain or loss recognized in income on derivatives for the years ended December 31:
|  | December 31, |
(In thousands) |  | 2017 |  |  | 2016 |  |  | 2015 |
Non-hedging interest rate derivatives: |  |  |  |  |  |  |  |  |
Increase in interest income |  | $ | 179 |  |  | $ | 95 |  |  | $ | 33 |
Increase in other income |  |  | 2,945 |  |  |  | 3,480 |  |  |  | 684 |
Hedging interest rate derivatives: |  |  |  |  |  |  |  |  |  |  |  |
Decrease (increase) in interest expense |  |  | 289 |  |  |  | (70 | ) |  |  | - |

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- Definition Tabular disclosure of the location and amount of derivative instruments and nonderivative instruments designated as hedging instruments reported before netting adjustments, and the amount of gain (loss) on derivative instruments and nonderivative instruments designated and qualified as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5618551-113959 + Details
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- Definition Tabular disclosure of the notional amounts of outstanding derivative positions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5579245-113959 + Details
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