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Components of Accumulated Other Comprehensive Loss, Net (Parenthetical) (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Amortization of actuarial losses, tax $ 5 $ 9
Derivative fair value adjustment, tax $ 6 $ 9