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Derivative Instruments and Hedging Activities (Details) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 USD ($) Agreement | Jun. 30, 2018 USD ($) | Jun. 30, 2019 USD ($) Agreement | Jun. 30, 2018 USD ($) | Dec. 31, 2018 USD ($) Agreement
Interest rate derivatives - Included Component [Abstract] |  |  |  |  |
Amount of (loss) or gain recognized in OCI | $ (314) | $ 424 | $ (484) | $ 1,472 |
Amount of (gain) reclassified from AOCI into interest expense | (738) | (540) | (1,537) | (899) |
Derivatives Designated as Hedging Instruments [Member] | Interest Rate Swaps [Member] |  |  |  |  |
Fair value adjustment recorded related to notional amount of derivatives outstanding and notional amount of risk participation agreements [Abstract] |  |  |  |  |
Fair value adjustment included in other assets | 521 |  | 521 |  | $ 2,428
Fair value adjustment included in other liabilities | 18 |  | 18 |  | 0
Notional amount | 150,000 |  | 150,000 |  | $ 225,000
Derivatives Designated as Hedging Instruments [Member] | Cash Flow Hedging [Member] |  |  |  |  |
Interest rate derivatives - Included Component [Abstract] |  |  |  |  |
Amount of (loss) or gain recognized in OCI | (314) | 424 | (484) | 1,472 |
Derivatives Designated as Hedging Instruments [Member] | Cash Flow Hedging [Member] | Interest (Income) Expense [Member] |  |  |  |  |
Interest rate derivatives - Included Component [Abstract] |  |  |  |  |
Amount of (gain) reclassified from AOCI into interest expense | (738) | (540) | (1,537) | (899) |
Derivatives Designated as Hedging Instruments [Member] | Cash Flow Hedging [Member] | Interest Rate Swaps [Member] |  |  |  |  |
Fair value adjustment recorded related to notional amount of derivatives outstanding and notional amount of risk participation agreements [Abstract] |  |  |  |  |
Amount to be reclassified from AOCI as a reduction to interest expense during next twelve months |  |  | 500 |  |
Derivatives Not Designated as Hedging Instruments [Member] | Other Income [Member] |  |  |  |  |
Gain or loss recognized in income on derivatives not designating as a hedging relationship [Abstract] |  |  |  |  |
Increase in other income | $ 19 | $ 320 | $ 106 | $ 123 |
Derivatives Not Designated as Hedging Instruments [Member] | Interest Rate Swaps [Member] |  |  |  |  |
Interest rate derivatives [Abstract] |  |  |  |  |
Number of risk participation agreements held | Agreement | 10 |  | 10 |  | 9
Fair value adjustment recorded related to notional amount of derivatives outstanding and notional amount of risk participation agreements [Abstract] |  |  |  |  |
Fair value adjustment included in other assets and other liabilities | $ 38,454 |  | $ 38,454 |  | $ 17,572
Notional amount | 757,614 |  | 757,614 |  | 653,369
Derivatives Not Designated as Hedging Instruments [Member] | Interest Rate Swaps [Member] | Other Assets [Member] |  |  |  |  |
Interest rate derivatives [Abstract] |  |  |  |  |
Fair value of derivative asset | 69 |  | 69 |  | 36
Derivatives Not Designated as Hedging Instruments [Member] | Interest Rate Swaps [Member] | Other Liabilities [Member] |  |  |  |  |
Interest rate derivatives [Abstract] |  |  |  |  |
Fair value of derivative liability | 93 |  | 93 |  | 17
Derivatives Not Designated as Hedging Instruments [Member] | Risk Participation Agreements [Member] |  |  |  |  |
Fair value adjustment recorded related to notional amount of derivatives outstanding and notional amount of risk participation agreements [Abstract] |  |  |  |  |
Notional amount | $ 73,141 |  | $ 73,141 |  | $ 70,785

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