CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2016	Jun. 27, 2015	Jul. 02, 2016	Jun. 27, 2015
Income Statement [Abstract]
Net sales	$ 404,041	$ 413,359	$ 836,802	$ 843,036
Cost of sales	335,478	343,812	697,389	702,595
Selling, general and administrative expenses	44,734	44,008	91,973	91,165
Amortization of intangible assets	1,379	1,907	2,986	3,775
Restructuring and other charges	880	1,977	5,870	6,046
Operating income	21,570	21,655	38,584	39,455
Interest expense, net	21,512	25,247	45,607	50,906
(Gain) loss on early extinguishment of debt, net	(51,273)	126	(72,886)	559
Other (income) expense, net	(1,644)	391	(1,090)	559
Income (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)
(Loss) income from discontinued operations, net of taxes	(3,304)	950	(5,121)	1,450
Net income (loss)	47,556	(2,405)	58,759	(10,084)
Other comprehensive income (loss):
Changes in pension and other employee benefit accounts, net of taxes	2,480	1,342	4,960	2,684
Currency translation adjustment, net	(157)	91	1,585	(1,239)
Total other comprehensive income	2,323	1,433	6,545	1,445
Comprehensive income (loss)	$ 49,879	$ (972)	$ 65,304	$ (8,639)
Income (loss) per share – basic:
Continuing operations per share - basic	$ 5.97	$ (0.39)	$ 7.51	$ (1.36)
Discontinued operations per share - basic	(0.39)	0.11	(0.60)	0.17
Net income (loss) per share - basic	5.58	(0.28)	6.91	(1.19)
Income (loss) per share – diluted:
Continuing operations per share - diluted	5.15	(0.39)	6.43	(1.36)
Discontinued operations per share - diluted	(0.33)	0.11	(0.51)	0.17
Net income (loss) per share - diluted	$ 4.82	$ (0.28)	$ 5.92	$ (1.19)
Weighted average shares outstanding:
Basic shares	8,517	8,479	8,501	8,474
Diluted shares	9,977	8,479	10,143	8,474