Accumulated Other Comprehensive Income (Loss) (Reclassifications out of AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Oct. 01, 2016	Jul. 02, 2016	Apr. 02, 2016	Jan. 02, 2016	Sep. 26, 2015	Jun. 27, 2015	Mar. 28, 2015	Dec. 31, 2016	Jan. 02, 2016
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Loss from discontinued operations, net of taxes	$ 1,538	$ 686	$ (3,304)	$ (1,817)	$ (13,159)	$ 319	$ 950	$ 500	$ (2,897)	$ (11,390)
Total before tax									75,104	(15,068)
Income tax expense									(4,258)	(4,393)
Income (loss) from continuing operations	$ (1,779)	$ 8,745	$ 50,860	$ 13,020	$ (4,365)	$ (3,562)	$ (3,355)	$ (8,179)	70,846	(19,461)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Total before tax									12,294	8,877
Income tax expense									0	0
Income (loss) from continuing operations									12,294	8,877
Foreign Currency Translation [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Loss from discontinued operations, net of taxes									2,338	0
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									$ 9,956	$ 8,877