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Derivative Financial Instruments - Net Gains (Losses) Recorded in Accumulated Other Comprehensive Income (Loss) (Details) - Interest rate contract - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Derivative [Line Items]    
Cash pledged to secure obligations $ 3,200 $ 300
Cash Flow Hedging    
Derivative [Line Items]    
Amount of (gain) loss recognized in OCI (2,526) (202)
Amount of (gain) loss reclassified from OCI to interest expense $ 542 $ 2