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Assets and Liabilities Carried at Fair Value Measured on Recurring Basis (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Other assets    
Assets:    
Available-for-sale securities $ 254 $ 266
Other Current Assets    
Assets:    
Derivative financial instruments 1,249 644
Accrued expenses and other current liabilities    
Liabilities:    
Derivative financial instruments 7  
Fair Value Measurements, Level 1 | Other assets    
Assets:    
Available-for-sale securities 254 266
Fair Value Measurements, Level 2 | Other Current Assets    
Assets:    
Derivative financial instruments 1,249 $ 644
Fair Value Measurements, Level 2 | Accrued expenses and other current liabilities    
Liabilities:    
Derivative financial instruments $ 7