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Fair Values of Derivative Financial Instruments Included in Consolidated Balance Sheets (Detail) - Fair Value, Observable inputs, Level 2 - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Designated as Hedging Instrument | Interest Rate Contract | Deferred rent & other long-term liabilities    
Derivatives, Fair Value [Line Items]    
Fair Value of Derivative Liabilities   $ 3
Designated as Hedging Instrument | Interest Rate Contract | Accrued expenses    
Derivatives, Fair Value [Line Items]    
Fair Value of Derivative Liabilities   4
Designated as Hedging Instrument | Interest Rate Contract | Prepaid expenses    
Derivatives, Fair Value [Line Items]    
Fair Value of Derivative Liabilities $ 16  
Not Designated as Hedging Instrument | Foreign exchange contract | Prepaid expenses and other current assets    
Derivatives, Fair Value [Line Items]    
Fair Value of Derivative Assets $ 636 $ 924