CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Sep. 30, 2017	Oct. 01, 2016
Statement of Comprehensive Income [Abstract]
Net change with respect to derivative instruments and hedging activities, tax (expense) benefit	$ 23	$ (119)	$ (162)	$ (606)
Net actuarial loss on pension and postretirement obligations, tax benefit (expense)	102	(255)	285	(1,175)
Attributable to unconsolidated affiliates, tax benefit (expense)	$ 415	$ (2,888)	$ 614	$ (3,700)