Accumulated Other Comprehensive Income (Loss) (Reclassifications out of AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 02, 2016	Sep. 26, 2015	Jun. 27, 2015	Mar. 28, 2015	Dec. 27, 2014	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Jan. 02, 2016	Dec. 27, 2014	Dec. 28, 2013
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Total before tax									$ (15,068)	$ (90,894)	$ (72,115)
Income tax expense									(4,393)	(4,159)	(14,161)
Loss from continuing operations	$ (4,365)	$ (3,562)	$ (3,355)	$ (8,179)	$ (23,398)	$ (14,030)	$ (39,942)	$ (17,683)	(19,461)	(95,053)	$ (86,276)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Total before tax									8,877	3,220
Income tax expense									0	0
Loss from continuing operations									8,877	3,220
Pension and Other Postretirement Benefits [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Net actuarial losses									$ 8,877	$ 3,220