Annual report pursuant to Section 13 and 15(d)

Notional Amounts and Gross Fair Values for Derivative Instruments without Hedge Accounting Designation (Detail)

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Notional Amounts and Gross Fair Values for Derivative Instruments without Hedge Accounting Designation (Detail) - Not Designated as Hedging Instrument
$ in Thousands
Dec. 31, 2015
USD ($)
Derivative [Line Items]  
Notional Amount $ 14,086
Fair value of current liabilities (581)
Forward Contracts [Member]  
Derivative [Line Items]  
Notional Amount 5,572
Fair value of current liabilities (329)
Forward Contracts [Member] | Canada, Dollars  
Derivative [Line Items]  
Notional Amount 4,200
Fair value of current liabilities (246)
Forward Contracts [Member] | Other Currencies  
Derivative [Line Items]  
Notional Amount 1,372
Fair value of current liabilities (83)
Options Held [Member] | Canada, Dollars  
Derivative [Line Items]  
Notional Amount 8,514
Fair value of current liabilities $ (252)