Quarterly Financial Data (Unaudited) (Details) (USD $)	3 Months Ended								12 Months Ended			1 Months Ended
	Dec. 28, 2014	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Dec. 29, 2013	Sep. 29, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012	May 31, 2014	Sep. 17, 2014	May 14, 2014
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 221,500,000	$ 217,100,000	$ 229,300,000	$ 200,100,000	$ 235,700,000	$ 226,400,000	$ 235,200,000	$ 253,300,000	$ 868,000,000	$ 950,600,000	$ 969,200,000
Gross profit	56,200,000	53,000,000	56,400,000	52,600,000	61,500,000	52,300,000	60,400,000	65,800,000	218,200,000	240,000,000	257,200,000
Total operating income (loss) from continuing operations	10,700,000	1,200,000	4,700,000	3,300,000	5,400,000	6,100,000	8,900,000	11,400,000	19,900,000	31,800,000	(49,700,000)
Provision (benefit) for income taxes from continuing operations	1,400,000	(200,000)	1,600,000	2,300,000	(2,900,000)	200,000	(100,000)	2,800,000	5,100,000	0	(1,600,000)
Net loss	(2,200,000)	(10,900,000)	(49,900,000)	(15,000,000)	(7,400,000)	(9,900,000)	(9,600,000)	(10,300,000)	(78,000,000)	(37,200,000)	(114,400,000)
Basic and diluted loss per common share:
Basic and diluted (in dollars per share)	$ (0.04)	$ (0.19)	$ (0.87)	$ (0.26)	$ (0.12)	$ (0.17)	$ (0.17)	$ (0.18)	$ (1.35)	$ (0.65)	$ (2.44)
Quarterly Financial Data
Change in accrual for excess facilities		4,700,000							200,000	(4,700,000)	1,800,000
Expense related to workforce reductions						2,000,000
Amortization of purchased intangibles	8,900,000	9,000,000	9,000,000	9,300,000					22,500,000	36,200,000	43,900,000
Statement [Line Items]
Loss on extinguishment of debt		39,100,000							39,100,000	0	0
Principal	669,800,000.0				629,800,000.0				669,800,000.0	629,800,000.0
Senior notes | 10% Senior Notes due June 2017
Statement [Line Items]
Loss on extinguishment of debt												39,100,000
Principal												625,000,000.0
Stated interest rate percentage												10.00%
Senior notes | 7% Senior Notes due 2019
Statement [Line Items]
Principal	$ 625,000,000								$ 625,000,000			$ 625,000,000.0
Stated interest rate percentage	7.00%								7.00%				7.00%	7.00%