XML 75 R59.htm IDEA: XBRL DOCUMENT v3.6.0.2
Property and Equipment - Summary of Property and Equipment (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Property, Plant and Equipment [Line Items]    
Computer hardware and software $ 683,738 $ 583,963
Leasehold improvements 342,940 312,448
Furniture and equipment 247,768 237,734
Equipment under capital leases 10,755 10,643
Total cost 1,285,201 1,144,788
Accumulated depreciation and amortization (724,445) (614,965)
Property and equipment, net $ 560,756 $ 529,823
Minimum [Member] | Computer hardware and software [Member]    
Property, Plant and Equipment [Line Items]    
Plant and equipment, useful life, years 3 years  
Minimum [Member] | Leasehold improvements [Member]    
Property, Plant and Equipment [Line Items]    
Plant and equipment, useful life, years 1 year  
Minimum [Member] | Furniture and equipment [Member]    
Property, Plant and Equipment [Line Items]    
Plant and equipment, useful life, years 1 year  
Minimum [Member] | Equipment under capital leases [Member]    
Property, Plant and Equipment [Line Items]    
Plant and equipment, useful life, years 3 years  
Maximum [Member] | Computer hardware and software [Member]    
Property, Plant and Equipment [Line Items]    
Plant and equipment, useful life, years 10 years  
Maximum [Member] | Leasehold improvements [Member]    
Property, Plant and Equipment [Line Items]    
Plant and equipment, useful life, years 15 years  
Maximum [Member] | Furniture and equipment [Member]    
Property, Plant and Equipment [Line Items]    
Plant and equipment, useful life, years 10 years  
Maximum [Member] | Equipment under capital leases [Member]    
Property, Plant and Equipment [Line Items]    
Plant and equipment, useful life, years 5 years