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Property and Equipment - Summary of Property and Equipment (Detail) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Property, Plant and Equipment [Line Items]    
Property and equipment $ 200,141 $ 1,154,223
Less accumulated depreciation and amortization (87,956) (231,939)
Property and equipment, net 112,185 922,284
Land [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment 5,579 160,126
Land Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment 2,242 25,630
Buildings [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment 51,409 595,384
Buildings and Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment 9,564 117,460
Equipment under Capital Leases [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment 4,434 5,937
Computer Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment 79,934 116,477
Furniture, Fixtures and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment 4,844 63,470
Internally Developed Software [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment 36,548 36,173
Other [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment 1,098 1,176
Construction in Progress [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment $ 4,489 $ 32,390