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Derivative Financial Instruments - Effect of Derivative Financial Instruments on Other Comprehensive Income (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Derivative [Line Items]    
Unrealized holding gain (loss) arising during the period $ 58 $ (1,314)
Designated as Hedging Instrument | Cash Flow Hedging | Interest Rate Products    
Derivative [Line Items]    
Unrealized holding gain (loss) arising during the period $ 58 $ (1,314)