CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 25, 2016	Sep. 27, 2015	Sep. 25, 2016	Sep. 27, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 66,322	$ 60,852	$ 176,778	$ 144,431
Other comprehensive income (loss), net of tax:
Foreign currency translation, net of tax of $(327), $2,750, $(2,978) and $20,854 for the three and nine month periods, respectively	(130)	(29,329)	11,088	(91,216)
Pension and other postretirement benefit plans adjustment, net of tax of $(737), $(609), $(2,007) and $(1,894) for the three and nine month periods, respectively	1,430	1,185	3,914	3,622
Derivatives qualifying as hedges, net of tax of $(393), $420, $212 and $856 for the three and nine month periods, respectively	(223)	(730)	761	(1,489)
Other comprehensive income (loss), net of tax:	1,077	(28,874)	15,763	(89,083)
Comprehensive income	67,399	31,978	192,541	55,348
Less: comprehensive income (loss) attributable to noncontrolling interest	24	(57)	421	613
Comprehensive income attributable to common shareholders	$ 67,375	$ 32,035	$ 192,120	$ 54,735