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Derivative Financial Instruments - Balance Sheet Location and Fair Value of Assets and Liabilities Associated with Derivative Financial Instruments (Detail) - Foreign exchange contract - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Other Current Liabilities    
Derivatives, Fair Value [Line Items]    
Foreign exchange contracts: other current liabilities $ 390 $ 429
Other Current Assets    
Derivatives, Fair Value [Line Items]    
Foreign exchange contracts: other current assets $ 636 $ 34