CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jul. 01, 2018	Jun. 30, 2019	Jul. 01, 2018
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 83,375	$ (2,496)	$ 124,272	$ 53,688
Other comprehensive income (loss), net of tax:
Foreign currency translation, net of tax of $0, $9,378, $0, and $3,505, for the three and six months periods, respectively	12,568	(125,705)	12,332	(44,517)
Pension and other postretirement benefit plans adjustment, net of tax of $(446), $(656), $(836), and $(890) for the three and six months periods, respectively	1,459	2,015	2,688	2,896
Derivatives qualifying as hedges, net of tax of $83, $100, $82, and $(111) for the three and six months periods, respectively	755	(329)	158	292
Other comprehensive income (loss), net of tax:	14,782	(124,019)	15,178	(41,329)
Comprehensive income (loss)	$ 98,157	$ (126,515)	$ 139,450	$ 12,359