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Property and Equipment - Summary of Property and Equipment (Detail) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Property, Plant and Equipment [Line Items]    
Property and equipment $ 957,954 $ 812,562
Less accumulated depreciation and amortization (163,917) (145,079)
Property and equipment, net 794,037 667,483
Land [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment 122,472 103,280
Land Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment 21,092 13,389
Buildings [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment 412,258 392,754
Building and Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment 78,108 72,494
Equipment under Capital Leases [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment 5,943 6,467
Computer Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment 96,291 91,225
Furniture, Fixtures and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment 52,799 51,352
Internally Developed Software [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment 27,284 25,996
Other [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment 1,177 1,099
Construction in Progress [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment $ 140,530 $ 54,506