Accumulated Other Comprehensive Income (Loss) (Reclassifications out of AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2016	Jun. 27, 2015	Jul. 02, 2016	Jun. 27, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
(Loss) income from discontinued operations, net of taxes	$ (3,304)	$ 950	$ (5,121)	$ 1,450
Loss from continuing operations before income taxes	52,975	(4,109)	66,953	(12,569)
Income tax expense (benefit)	(2,115)	754	(3,073)	1,035
Income (loss) from continuing operations	50,860	(3,355)	63,880	(11,534)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Loss from continuing operations before income taxes	2,480	2,156	6,905	4,312
Income tax expense (benefit)	0	(814)	0	(1,628)
Income (loss) from continuing operations	2,480	1,342	6,905	2,684
Foreign Currency Translation [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
(Loss) income from discontinued operations, net of taxes	0	0	1,945	0
Pension and Other Postretirement Benefits [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net actuarial losses	$ 2,480	$ 2,156	$ 4,960	$ 4,312