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Derivative Instruments - Fair Value Hedge Impact on Balance Sheet (Details) - Long-term Debt - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Derivative [Line Items]    
Carrying Amount of the Hedged Liability $ 94,024 $ 98,114
Cumulative Amount of Fair Value Hedging Adjustments Included in the Carrying Amount of the Hedged Liability $ 4,386 $ 209