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Supplemental Cash Flow Information (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 24, 2016
Sep. 26, 2015
Sep. 24, 2016
Sep. 26, 2015
Supplemental Cash Flow Information [Abstract]        
Interest     $ 21,187 $ 18,062
Income taxes     152,351 128,693
Unrealized gain (loss) from foreign currency hedging activities $ (803) $ 2,671 $ 1,316 $ 1,850