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Property and Equipment (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Property, Plant and Equipment [Line Items]    
Leasehold improvements $ 65,742 $ 62,906
Construction in progress 18,477 2,883
Furniture and equipment 36,394 34,781
Computer equipment and software 97,390 92,563
Property, Plant and Equipment, Gross, Total 218,003 193,133
Accumulated depreciation and amortization (138,996) (124,941)
Property and equipment, net $ 79,007 $ 68,192