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Assets and Liabilities Carried at Fair Value Measured on Recurring Basis (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Other assets
    
Assets:    
Available-for-sale securities $ 265 $ 226
Other Current Assets
    
Assets:    
Derivative financial instruments Other current assets 118  
Accrued expenses and other current liabilities
    
Liabilities:    
Derivative financial instruments   197
Fair Value Measurements, Level 1 | Other assets
    
Assets:    
Available-for-sale securities 265 226
Fair Value Measurements, Level 2 | Other Current Assets
    
Assets:    
Derivative financial instruments Other current assets 118  
Fair Value Measurements, Level 2 | Accrued expenses and other current liabilities
    
Liabilities:    
Derivative financial instruments   $ 197