Quarterly Results of Operations (Unaudited) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 215,821	$ 207,339	$ 208,449	$ 202,057	$ 199,539	$ 197,697	$ 211,165	$ 215,500	$ 833,666	$ 823,903	$ 924,052
Operating income (loss)	(5,207)	3,623	1,585	(18,212)	(14,448)	(3,437)	(12,872)	(4,323)	(18,211)	(35,080)	28,083
Loss from continuing operations	(14,550)	(4,744)	(11,945)	(33,630)	(23,704)	(13,169)	(23,642)	(17,997)	(64,869)	(78,512)	(2,350)
Income (loss) from discontinued operations	103	(1,076)	(1,151)	(1,510)	(1,547)	(1,088)	(1,278)	243	(3,634)	(3,670)	9,042
Net income (loss)	$ (14,447)	$ (5,820)	$ (13,096)	$ (35,140)	$ (25,251)	$ (14,257)	$ (24,920)	$ (17,754)	$ (68,503)	$ (82,182)	$ 6,692
Net loss per basic share:
Loss from continuing operations (in dollars per share)	$ (0.32)	$ (0.11)	$ (0.26)	$ (0.75)	$ (0.53)	$ (0.29)	$ (0.53)	$ (0.40)	$ (1.44)	$ (1.75)	$ (0.05)
Loss from discontinued operations (in dollars per share)	$ 0.00	$ (0.02)	$ (0.03)	$ (0.03)	$ (0.03)	$ (0.03)	$ (0.03)	$ 0.00	$ (0.08)	$ (0.08)	$ 0.21
Net income (loss) (in dollars per share)	$ (0.32)	$ (0.13)	$ (0.29)	$ (0.78)	$ (0.56)	$ (0.32)	$ (0.56)	$ (0.40)	$ (1.52)	$ (1.83)	$ 0.16
Net loss per diluted share:
Loss from continuing operations (in dollars per share)	$ (0.32)	$ (0.11)	$ (0.26)	$ (0.75)	$ (0.53)	$ (0.29)	$ (0.53)	$ (0.40)	$ (1.44)	$ (1.75)	$ (0.04)
Loss from discontinued operations (in dollars per share)	$ 0.00	$ (0.02)	$ (0.03)	$ (0.03)	$ (0.03)	$ (0.03)	$ (0.03)	$ 0.00	$ (0.08)	$ (0.08)	$ 0.17
Net income (loss) (in dollars per share)	$ (0.32)	$ (0.13)	$ (0.29)	$ (0.78)	$ (0.56)	$ (0.32)	$ (0.56)	$ (0.40)	$ (1.52)	$ (1.83)	$ 0.13