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Derivative Instruments and Hedging Activities - Effect of Derivative Financial Instruments on Income Statement (Details) - Derivatives Designated as Hedging Instruments - Interest rate contracts - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Interest expense      
Derivative [Line Items]      
Amount of Loss Reclassified from Other Comprehensive Income into Income (Effective Portion) $ (906) $ (334) $ (470)
Cash Flow Hedging      
Derivative [Line Items]      
Amount of Gain (Loss) Recognized in Other Comprehensive Income on Derivative (Effective Portion) $ (1,480) $ (1,072)