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Derivatives - Effect of Derivative Instruments on Balance Sheets (Details) - Derivatives Designated as Hedging Instruments - Interest Rate Swaps - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Derivatives    
Derivative liability $ 5,076 $ 6,337
Accrued liabilities    
Derivatives    
Derivative liability 4,771 4,810
Other liabilities    
Derivatives    
Derivative liability $ 305 $ 1,527