CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 03, 2016	Jul. 05, 2015	Jul. 03, 2016	Jul. 05, 2015
Pension and other postretirement benefit liabilities:
Reclassification of prior service credits for pension and postretirement benefit plans recorded to net income, tax benefit (expense)	$ 2,482	$ 2,691	$ 4,952	$ 5,567
Reclassification of net actuarial loss for pension and postretirement benefit plans recorded to net income, tax benefit (expense)	(12,468)	(14,610)	(24,432)	11,951
Valuation adjustment for pension and postretirement benefit plans, tax benefit (expense)	(648)	0	(648)	139,583
Change in fair value of derivatives, tax benefit (expense)	(1,664)	361	(1,534)	(620)
Other Comprehensive Income, other, tax benefit (expense)	463	17	(102)	38
Change in cumulative translation adjustment, tax benefit (expense)	$ 0	$ 0	$ 0	$ (9,650)