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Debt - Maturities (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Debt Disclosure [Abstract]    
Remaining 2019 $ 10,358  
2020 20,714  
2021 20,714  
2022 20,714  
2023 20,714  
Thereafter 2,788,560  
Total debt $ 2,881,774 $ 2,842,510