CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2016	Sep. 26, 2015	Oct. 01, 2016	Sep. 26, 2015
Income Statement [Abstract]
Net sales	$ 405,955	$ 419,783	$ 1,242,757	$ 1,262,819
Cost of sales	335,733	347,409	1,033,122	1,050,004
Selling, general and administrative expenses	45,560	45,394	137,533	136,559
Amortization of intangible assets	1,375	1,981	4,361	5,756
Restructuring and other charges	2,414	5,483	8,284	11,529
Operating income	20,873	19,516	59,457	58,971
Interest expense, net	20,318	25,095	65,925	76,001
(Gain) loss on early extinguishment of debt, net	(7,442)	0	(80,328)	559
Other income, net	(1,735)	(1,332)	(2,825)	(773)
Income (loss) from continuing operations before income taxes	9,732	(4,247)	76,685	(16,816)
Income tax expense (benefit)	987	(685)	4,060	(1,720)
Income (loss) from continuing operations	8,745	(3,562)	72,625	(15,096)
Income (loss) from discontinued operations, net of taxes	686	319	(4,435)	1,769
Net income (loss)	9,431	(3,243)	68,190	(13,327)
Other comprehensive income (loss):
Changes in pension and other employee benefit accounts, net of taxes	2,507	1,433	7,467	4,117
Currency translation adjustment, net	557	(1,893)	2,142	(3,132)
Total other comprehensive income	3,064	(460)	9,609	985
Comprehensive income (loss)	$ 12,495	$ (3,703)	$ 77,799	$ (12,342)
Income (loss) per share – basic:
Continuing operations per share - basic	$ 1.02	$ (0.42)	$ 8.53	$ (1.78)
Discontinued operations per share - basic	0.08	0.04	(0.52)	0.21
Net income (loss) per share - basic	1.10	(0.38)	8.01	(1.57)
Income (loss) per share – diluted:
Continuing operations per share - diluted	1.00	(0.42)	7.61	(1.78)
Discontinued operations per share - diluted	0.08	0.04	(0.46)	0.21
Net income (loss) per share - diluted	$ 1.08	$ (0.38)	$ 7.15	$ (1.57)
Weighted average shares outstanding:
Basic shares	8,552	8,484	8,518	8,477
Diluted shares	8,967	8,484	9,745	8,477