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Derivative Financial Instruments - Offsetting of Derivative Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Gross Amounts of Recognized Assets Presented in the Consolidated Balance Sheets $ 52 $ 4,297
Derivative Financial Instruments (52) (56)
Cash Collateral Received 0 0
Net Amount $ 0 $ 4,241