CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ 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
Income Statement [Abstract]
Net sales	$ 417,244	$ 405,955	$ 404,041	$ 432,761	$ 478,960	$ 419,783	$ 413,359	$ 429,677	$ 1,660,001	$ 1,741,779
Cost of sales									1,386,746	1,450,876
Selling, general and administrative expenses									179,525	186,749
Amortization of intangible assets									5,744	7,785
Restructuring and other charges									11,954	12,576
Operating income	16,575	20,873	21,570	17,014	24,822	19,516	21,655	17,800	76,032	83,793
Interest expense, net									85,753	100,805
(Gain) loss on early extinguishment of debt, net									(82,481)	1,252
Other income, net									(2,344)	(3,196)
Income (loss) from continuing operations before income taxes									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)
Loss from discontinued operations, net of taxes	1,538	686	(3,304)	(1,817)	(13,159)	319	950	500	(2,897)	(11,390)
Net income (loss)	$ (241)	$ 9,431	$ 47,556	$ 11,203	$ (17,524)	$ (3,243)	$ (2,405)	$ (7,679)	67,949	(30,851)
Other comprehensive income (loss):
Changes in pension and other employee benefit accounts, net of taxes									756	(3,438)
Currency translation adjustment, net									1,945	(4,295)
Total other comprehensive income (loss)									2,701	(7,733)
Comprehensive income (loss)									$ 70,650	$ (38,584)
Income (loss) per share – basic:
Continuing operations per share - basic	$ (0.21)	$ 1.02	$ 5.97	$ 1.53	$ (0.51)	$ (0.42)	$ (0.39)	$ (0.97)	$ 8.31	$ (2.30)
Discontinued operations per share - basic	0.18	0.08	(0.39)	(0.21)	(1.56)	0.04	0.11	0.06	(0.34)	(1.34)
Net income (loss) per share - basic	(0.03)	1.10	5.58	1.32	(2.07)	(0.38)	(0.28)	(0.91)	7.97	(3.64)
Income (loss) per share – diluted:
Continuing operations per share - diluted	(0.21)	1.00	5.15	1.37	(0.51)	(0.42)	(0.39)	(0.97)	7.63	(2.30)
Discontinued operations per share - diluted	0.18	0.08	(0.33)	(0.17)	(1.56)	0.04	0.11	0.06	(0.31)	(1.34)
Net income (loss) per share - diluted	$ (0.03)	$ 1.08	$ 4.82	$ 1.20	$ (2.07)	$ (0.38)	$ (0.28)	$ (0.91)	$ 7.32	$ (3.64)
Weighted average shares outstanding:
Basic shares									8,527	8,479
Diluted shares									9,492	8,479