Accumulated Other Comprehensive Income (Loss) (Changes in AOCI Components) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated Other Comprehensive Loss, Beginning balance	$ (105,930)	$ (98,197)
Other comprehensive income (loss) before reclassifications	(9,593)	(16,610)
Amounts reclassified from AOCI	12,294	8,877
Total other comprehensive income (loss)	2,701	(7,733)
Accumulated Other Comprehensive Loss, Ending balance	(103,229)	(105,930)
Foreign Currency Translation [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated Other Comprehensive Loss, Beginning balance	(7,200)	(2,905)
Other comprehensive income (loss) before reclassifications	(393)	(4,295)
Amounts reclassified from AOCI	2,338	0
Total other comprehensive income (loss)	1,945	(4,295)
Accumulated Other Comprehensive Loss, Ending balance	(5,255)	(7,200)
Pension and Other Postretirement Benefits [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated Other Comprehensive Loss, Beginning balance	(98,730)	(95,292)
Other comprehensive income (loss) before reclassifications	(9,200)	(12,315)
Amounts reclassified from AOCI	9,956	8,877
Total other comprehensive income (loss)	756	(3,438)
Accumulated Other Comprehensive Loss, Ending balance	$ (97,974)	$ (98,730)