CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 56,524	$ 77,015	$ 110,212	$ 195,188
Other comprehensive (loss) income, net of tax:
Foreign currency translation, net of tax of $(3,505), $(8,429), $0, and $(26,910), for the three and nine months periods, respectively	14,387	43,345	(30,130)	156,012
Pension and other postretirement benefit plans adjustment, net of tax of $(363), $(479), $(1,253), and $(1,476) for the three and nine month period, respectively	1,215	743	4,111	2,337
Derivatives qualifying as hedges, net of tax of $(308), $141, $(419) and $(1,029) for the three and nine month period, respectively	1,651	(243)	1,943	4,918
Other comprehensive (loss) income, net of tax:	17,253	43,845	(24,076)	163,267
Comprehensive income	$ 73,777	$ 120,860	$ 86,136	$ 358,455