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Long-term Debt - Schedule of Long-term Debt (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Debt Disclosure [Abstract]    
Term loan $ 395,618 $ 383,137
Less current maturities (4,000) (3,960)
Total long-term debt $ 391,618 $ 379,177