Guarantor Finanical Information Balance Sheet (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Cash and cash equivalents	$ 13,366	$ 8,454	$ 25,708	$ 30,829
Accounts receivable, less allowance for doubtful accounts	129,204	131,003
Receivables from affiliates	0	0
Inventories	243,331	236,932
Prepaid expenses and other current assets	16,172	13,029
Total current assets	402,073	389,418
Investment in joint venture	38,003	37,443
Goodwill	12,973	12,973
Intangible assets, net	52,695	56,555
Other assets	17,996	18,752
Investment in subsidiaries	0	0
Receivables from affiliates	0	0
Property, plant and equipment, net	68,536	72,835
Total assets	592,276	587,976
Accounts payable	85,998	68,782
Payables due to affiliates	0	0
Other current liabilities	36,539	27,998
Current portion of long-term debt	734	737
Total current liabilities	123,271	97,517
Long-term debt, less current portion	313,239	309,377
Payables due to affiliates	0	0
Deferred income taxes	6,585	8,360
Other non-current liabilities	22,168	22,402
Stockholders’ equity (deficit)	127,013	150,320
Total liabilities and stockholders’ equity	592,276	587,976
Parent
Cash and cash equivalents	3,947	511	3,893	8,675
Accounts receivable, less allowance for doubtful accounts	63,995	66,178
Receivables from affiliates	1,154	2,071
Inventories	144,964	142,314
Prepaid expenses and other current assets	5,734	3,490
Total current assets	219,794	214,564
Investment in joint venture	38,003	37,443
Goodwill	0	0
Intangible assets, net	40,480	42,772
Other assets	19,431	18,766
Investment in subsidiaries	58,142	70,274
Receivables from affiliates	126,815	113,188
Property, plant and equipment, net	43,027	46,094
Total assets	545,692	543,101
Accounts payable	53,995	41,613
Payables due to affiliates	1,154	2,071
Other current liabilities	29,609	18,841
Current portion of long-term debt	691	691
Total current liabilities	85,449	63,216
Long-term debt, less current portion	311,201	307,327
Payables due to affiliates	0	0
Deferred income taxes	0	0
Other non-current liabilities	22,029	22,238
Stockholders’ equity (deficit)	127,013	150,320
Total liabilities and stockholders’ equity	545,692	543,101
Guarantors
Cash and cash equivalents	970	977	1,350	495
Accounts receivable, less allowance for doubtful accounts	20,903	19,303
Receivables from affiliates	113	81
Inventories	19,720	19,320
Prepaid expenses and other current assets	1,060	1,033
Total current assets	42,766	40,714
Investment in joint venture	0	0
Goodwill	12,973	12,973
Intangible assets, net	0	0
Other assets	0	0
Investment in subsidiaries	0	0
Receivables from affiliates	39,249	36,607
Property, plant and equipment, net	11,858	12,184
Total assets	106,846	102,478
Accounts payable	11,593	8,055
Payables due to affiliates	0	0
Other current liabilities	2,281	3,065
Current portion of long-term debt	0	0
Total current liabilities	13,874	11,120
Long-term debt, less current portion	0	0
Payables due to affiliates	6,194	5,581
Deferred income taxes	5,524	5,524
Other non-current liabilities	0	0
Stockholders’ equity (deficit)	81,254	80,253
Total liabilities and stockholders’ equity	106,846	102,478
Non-Guarantors
Cash and cash equivalents	8,449	6,966	20,465	21,659
Accounts receivable, less allowance for doubtful accounts	44,306	45,522
Receivables from affiliates	0	0
Inventories	78,715	75,366
Prepaid expenses and other current assets	9,378	8,506
Total current assets	140,848	136,360
Investment in joint venture	0	0
Goodwill	0	0
Intangible assets, net	12,215	13,783
Other assets	997	996
Investment in subsidiaries	0	0
Receivables from affiliates	0	2,157
Property, plant and equipment, net	13,651	14,557
Total assets	167,711	167,853
Accounts payable	20,410	19,114
Payables due to affiliates	113	81
Other current liabilities	4,649	6,092
Current portion of long-term debt	43	46
Total current liabilities	25,215	25,333
Long-term debt, less current portion	2,038	2,050
Payables due to affiliates	159,870	146,371
Deferred income taxes	3,493	3,846
Other non-current liabilities	139	164
Stockholders’ equity (deficit)	(23,044)	(9,911)
Total liabilities and stockholders’ equity	167,711	167,853
Eliminations
Cash and cash equivalents	0	0	0	0
Accounts receivable, less allowance for doubtful accounts	0	0
Receivables from affiliates	(1,267)	(2,152)
Inventories	(68)	(68)
Prepaid expenses and other current assets	0	0
Total current assets	(1,335)	(2,220)
Investment in joint venture	0	0
Goodwill	0	0
Intangible assets, net	0	0
Other assets	(2,432)	(1,010)
Investment in subsidiaries	(58,142)	(70,274)
Receivables from affiliates	(166,064)	(151,952)
Property, plant and equipment, net	0	0
Total assets	(227,973)	(225,456)
Accounts payable	0	0
Payables due to affiliates	(1,267)	(2,152)
Other current liabilities	0	0
Current portion of long-term debt	0	0
Total current liabilities	(1,267)	(2,152)
Long-term debt, less current portion	0	0
Payables due to affiliates	(166,064)	(151,952)
Deferred income taxes	(2,432)	(1,010)
Other non-current liabilities	0	0
Stockholders’ equity (deficit)	(58,210)	(70,342)
Total liabilities and stockholders’ equity	$ (227,973)	$ (225,456)