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Derivative Instruments and Hedging Activities (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 USD ($) Agreement | Dec. 31, 2019 USD ($) Agreement | Dec. 31, 2018 USD ($)
Interest rate derivatives - Included Component [Abstract] |  |  |
Amount of (loss) gain recognized in OCI | $ (275) | $ (459) | $ 1,218
Amount of loss (gain) reclassified from AOCI into interest expense | 296 | (2,012) | (2,300)
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 | 0 | 4 |
Fair value adjustment included in other liabilities | 34 | 45 |
Notional amount | 25,000 | 50,000 |
Derivatives Designated as Hedging Instruments [Member] | Cash Flow Hedging [Member] |  |  |
Interest rate derivatives - Included Component [Abstract] |  |  |
Amount of (loss) gain recognized in OCI | (275) | (459) | 1,218
Derivatives Designated as Hedging Instruments [Member] | Cash Flow Hedging [Member] | Interest (Income) Expense [Member] |  |  |
Interest rate derivatives - Included Component [Abstract] |  |  |
Amount of loss (gain) reclassified from AOCI into interest expense | 296 | (2,012) | (2,300)
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 | 21 |  |
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 (decrease) in other income | $ 1 | $ 295 | $ (120)
Derivatives Not Designated as Hedging Instruments [Member] | Interest Rate Swaps [Member] |  |  |
Interest rate derivatives [Abstract] |  |  |
Number of risk participation agreements held | Agreement | 17 | 15 |
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 | $ 108,487 | $ 41,650 |
Notional amount | 2,447,168 | 963,209 |
Derivatives Not Designated as Hedging Instruments [Member] | Interest Rate Swaps [Member] | Other Assets [Member] |  |  |
Interest rate derivatives [Abstract] |  |  |
Fair value of derivative asset | 292 | 112 |
Derivatives Not Designated as Hedging Instruments [Member] | Interest Rate Swaps [Member] | Other Liabilities [Member] |  |  |
Interest rate derivatives [Abstract] |  |  |
Fair value of derivative liability | 125 | 82 |
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 | $ 112,313 | $ 97,614 |

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