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Components of Accumulated Other Comprehensive Loss, Net (Parenthetical) (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Derivative fair value adjustment, tax $ 22 $ 22 $ 10 $ 47
Amortization of actuarial losses, taxes $ 9 $ 13 $ 27 $ 40