Derivative Instruments and Hedging Activities - Interest Rate Swap Agreements (Details) - Not Designated as Hedging Instrument - Interest Rate Swap - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019
Derivative [Line Items]
Notional amount	$ 166,329	$ 44,531	$ 39,577
Other Assets
Derivative [Line Items]
Derivative asset	6,366	69	498
Other Liabilities
Derivative [Line Items]
Derivative liability	$ 6,366	$ 69	$ 498

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Nominal or face amount used to calculate payment on derivative.

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