Supplemental Guarantor Information Consolidating Condensed Statements of Operations (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Feb. 17, 2007
Condensed Financial Statements, Captions [Line Items]
Net sales	$ 289,024,000	$ 304,501,000
Cost of Goods Sold	211,929,000	221,708,000
Gross Profit	77,095,000	82,793,000
Selling, general and administrative expenses	81,240,000	96,802,000
Charges	240,000	2,240,000	11,112,000	9,336,000	11,395,000	10,534,000
Asset write-downs related to intangible assets	0	638,000
Income (Loss) from Equity Method Investments	0	0
Interest Income (Expense), Net	654,000	621,000
Income (Loss) from Continuing Operations before Income Taxes	(5,039,000)	(16,870,000)
Income tax provision	2,475,000	2,025,000
Net loss from Continuing Operations	(7,514,000)	(18,895,000)
Total Net Earnings from Discontinued Operations	260,000	919,000
Net Loss	(7,254,000)	(17,976,000)
Other Comprehensive Income (Loss)	(51,360,000)	6,690,000
Comprehensive Loss	(58,614,000)	(11,286,000)
The Company (Parent) [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	52,458,000	50,109,000
Cost of Goods Sold	47,014,000	45,704,000
Gross Profit	5,444,000	4,405,000
Selling, general and administrative expenses	25,320,000	31,650,000
Charges	199,000	1,164,000
Income (Loss) from Equity Method Investments	13,633,000	10,310,000
Interest Income (Expense), Net	531,000	(284,000)
Income (Loss) from Continuing Operations before Income Taxes	(6,973,000)	(17,815,000)
Income tax provision	281,000	161,000
Net loss from Continuing Operations	(7,254,000)	(17,976,000)
Total Net Earnings from Discontinued Operations	0	0
Net Loss	(7,254,000)	(17,976,000)
Other Comprehensive Income (Loss)	(51,360,000)	6,690,000
Comprehensive Loss	(58,614,000)	(11,286,000)
Combined Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	106,258,000	101,886,000
Cost of Goods Sold	80,642,000	75,471,000
Gross Profit	25,616,000	26,415,000
Selling, general and administrative expenses	17,468,000	21,049,000
Charges	0	(95,000)
Income (Loss) from Equity Method Investments	6,101,000	6,931,000
Interest Income (Expense), Net	346,000	748,000
Income (Loss) from Continuing Operations before Income Taxes	13,903,000	11,644,000
Income tax provision	0	(200,000)
Net loss from Continuing Operations	13,903,000	11,844,000
Total Net Earnings from Discontinued Operations	260,000	919,000
Net Loss	14,163,000	12,763,000
Other Comprehensive Income (Loss)	(4,510,000)	(2,290,000)
Comprehensive Loss	9,653,000	10,473,000
Combined Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	157,210,000	173,800,000
Cost of Goods Sold	111,216,000	121,890,000
Gross Profit	45,994,000	51,910,000
Selling, general and administrative expenses	38,452,000	44,103,000
Charges	41,000	1,171,000
Income (Loss) from Equity Method Investments	(70,000)	(36,000)
Interest Income (Expense), Net	(223,000)	157,000
Income (Loss) from Continuing Operations before Income Taxes	7,654,000	6,443,000
Income tax provision	2,194,000	2,064,000
Net loss from Continuing Operations	5,460,000	4,379,000
Total Net Earnings from Discontinued Operations	0	0
Net Loss	5,460,000	4,379,000
Other Comprehensive Income (Loss)	(48,811,000)	8,955,000
Comprehensive Loss	(43,351,000)	13,334,000
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net sales	(26,902,000)	(21,294,000)
Cost of Goods Sold	(26,943,000)	(21,357,000)
Gross Profit	41,000	63,000
Selling, general and administrative expenses	0	0
Charges	0	0
Income (Loss) from Equity Method Investments	(19,664,000)	(17,205,000)
Interest Income (Expense), Net	0	0
Income (Loss) from Continuing Operations before Income Taxes	(19,623,000)	(17,142,000)
Income tax provision	0	0
Net loss from Continuing Operations	(19,623,000)	(17,142,000)
Total Net Earnings from Discontinued Operations	0	0
Net Loss	(19,623,000)	(17,142,000)
Other Comprehensive Income (Loss)	53,321,000	(6,665,000)
Comprehensive Loss	33,698,000	(23,807,000)
Convertible Senior Subordinated Debentures at 4.125% February 2027 | Convertible Subordinated Debt
Condensed Financial Statements, Captions [Line Items]
Interest rate (as a percent)	4.125%
Principal Amount							$ 135,000,000