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Assets Held for Sale - Summary of Major Classes of Assets and Liabilities Reclassified to Held for Sale (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Long-term assets held for sale $ 279,801 $ 0
Disposal Group, Held-for-sale, Not Discontinued Operations    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Property and equipment, net 213,593  
Goodwill 32,330  
Tradenames 16,534  
Other assets 17,344  
Long-term assets held for sale 279,801  
Long-term debt, including current portion 34,798  
Other liabilities 196,681  
Total liabilities held for sale $ 231,479