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Financial Instruments and Risk Management (Effect of cash flow hedge derivative instruments) (Detail) - Foreign Exchange Contract - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Oct. 01, 2016
Sep. 30, 2017
Oct. 01, 2016
Derivatives, Fair Value [Line Items]        
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Loss (Effective Portion) $ (17,379) $ (3,594) $ (43,660) $ (7,131)
Cost of Sales        
Derivatives, Fair Value [Line Items]        
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss into Income (Effective Portion) $ 414 $ 715 $ 3,348 $ 4,424