Supplemental Guarantor Information Consolidating Condensed Statements of Operations (Details) (USD $)	3 Months Ended			6 Months Ended		12 Months Ended			3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2014	Mar. 31, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Jun. 30, 2014 The Company (Parent) [Member]	Jun. 30, 2013 The Company (Parent) [Member]	Jun. 30, 2014 The Company (Parent) [Member]	Jun. 30, 2013 The Company (Parent) [Member]	Jun. 30, 2014 Combined Guarantor Subsidiaries [Member]	Jun. 30, 2013 Combined Guarantor Subsidiaries [Member]	Jun. 30, 2014 Combined Guarantor Subsidiaries [Member]	Jun. 30, 2013 Combined Guarantor Subsidiaries [Member]	Jun. 30, 2014 Combined Non-Guarantor Subsidiaries [Member]	Jun. 30, 2013 Combined Non-Guarantor Subsidiaries [Member]	Jun. 30, 2014 Combined Non-Guarantor Subsidiaries [Member]	Jun. 30, 2013 Combined Non-Guarantor Subsidiaries [Member]	Jun. 30, 2014 Eliminations [Member]	Jun. 30, 2013 Eliminations [Member]	Jun. 30, 2014 Eliminations [Member]	Jun. 30, 2013 Eliminations [Member]	Jun. 30, 2014 Convertible Senior Subordinated Debentures February 2027 [Member] Convertible Subordinated Debt [Member]	Feb. 17, 2007 Convertible Senior Subordinated Debentures February 2027 [Member] Convertible Subordinated Debt [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	$ 331,312,000		$ 344,760,000	$ 640,381,000	$ 676,197,000				$ 54,612,000	$ 64,903,000	$ 104,721,000	$ 125,812,000	$ 113,337,000	$ 126,020,000	$ 219,791,000	$ 244,456,000	$ 187,778,000	$ 177,582,000	$ 361,578,000	$ 351,507,000	$ (24,415,000)	$ (23,745,000)	$ (45,709,000)	$ (45,578,000)
Interest Rate																									4.125%
Debt Instrument, Face Amount																										135,000,000
Cost of Goods Sold	237,379,000		251,203,000	461,200,000	489,056,000				49,117,000	55,077,000	94,821,000	107,430,000	84,012,000	91,674,000	161,596,000	177,523,000	128,602,000	128,350,000	250,492,000	250,055,000	(24,352,000)	(23,898,000)	(45,709,000)	(45,952,000)
Gross Profit	93,933,000		93,557,000	179,181,000	187,141,000				5,495,000	9,826,000	9,900,000	18,382,000	29,325,000	34,346,000	58,195,000	66,933,000	59,176,000	49,232,000	111,086,000	101,452,000	(63,000)	153,000	0	374,000
Selling, general and administrative expense	101,545,000		104,088,000	199,566,000	207,323,000				32,216,000	35,407,000	63,866,000	70,270,000	23,019,000	23,978,000	45,287,000	47,029,000	46,310,000	43,353,000	90,413,000	87,330,000	0	1,350,000	0	2,694,000
Restructuring Charges	2,090,000	2,240,000	2,592,000	4,330,000	5,114,000	9,336,000	11,395,000	10,534,000	890,000	1,810,000	2,054,000	3,481,000	0	13,000	(95,000)	13,000	1,200,000	769,000	2,371,000	1,620,000	0	0	0	0
Asset write-downs related to restructuring activities				1,163,000	0
Income (Loss) from Equity Method Investments	0		0	0	0				14,036,000	25,370,000	24,346,000	73,388,000	7,696,000	6,729,000	14,627,000	12,537,000	(28,000)	(180,000)	(64,000)	(115,000)	(21,704,000)	(31,919,000)	(38,909,000)	(85,810,000)
Interest Income (Expense), Net	835,000		741,000	1,573,000	1,751,000				0	(399,000)	(284,000)	(444,000)	626,000	1,120,000	1,491,000	1,556,000	209,000	20,000	366,000	639,000	0	0	0	0
Income (Loss) from Continuing Operations before Income Taxes	(10,537,000)		(13,864,000)	(26,288,000)	(27,047,000)				(13,575,000)	(1,622,000)	(31,390,000)	18,463,000	13,376,000	15,964,000	26,139,000	30,872,000	11,429,000	4,910,000	17,872,000	11,748,000	(21,767,000)	(33,116,000)	(38,909,000)	(88,130,000)
Income tax provision	3,075,000		10,625,000	5,300,000	3,150,000				37,000	10,839,000	198,000	(4,257,000)	0	(25,000)	0	(50,000)	3,038,000	(189,000)	5,102,000	7,457,000	0	0	0	0
Income (Loss) from Continuing Operations	(13,612,000)		(24,489,000)	(31,588,000)	(30,197,000)					(12,461,000)		22,720,000		15,989,000		30,922,000		5,099,000		4,291,000		(33,116,000)		(88,130,000)
Total Net Earnings from Discontinued Operations	0		12,028,000	0	52,917,000					0		0		12,028,000		52,917,000		0		0		0		0
Net Earnings (loss)	(13,612,000)		(12,461,000)	(31,588,000)	22,720,000				(13,612,000)	(12,461,000)	(31,588,000)	22,720,000	13,376,000	28,017,000	26,139,000	83,839,000	8,391,000	5,099,000	12,770,000	4,291,000	(21,767,000)	(33,116,000)	(38,909,000)	(88,130,000)
Other Comprehensive Income (Loss)	(4,277,000)		(8,163,000)	2,413,000	(8,029,000)				(4,277,000)	(8,163,000)	2,413,000	(8,029,000)	(2,502,000)	1,551,000	(213,000)	(635,000)	11,432,000	(9,694,000)	2,477,000	(7,907,000)	(8,930,000)	8,143,000	(2,264,000)	8,542,000
Comprehensive Income (Loss)	$ (17,889,000)		$ (20,624,000)	$ (29,175,000)	$ 14,691,000				$ (17,889,000)	$ (20,624,000)	$ (29,175,000)	$ 14,691,000	$ 10,874,000	$ 29,568,000	$ 25,926,000	$ 83,204,000	$ 19,823,000	$ (4,595,000)	$ 15,247,000	$ (3,616,000)	$ (30,697,000)	$ (24,973,000)	$ (41,173,000)	$ (79,588,000)