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Derivative Financial Instruments (Balance Sheet Location) (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Jun. 24, 2018
Derivatives, Fair Value [Line Items]      
Derivative liability $ (23,862) $ (6,705) $ 0
Interest Rate Swap [Member] | Not Designated As Hedging [Member]      
Derivatives, Fair Value [Line Items]      
Derivative liability $ (23,862) $ (6,705)  
Derivative asset     $ 542