Guarantor Finanical Information Balance Sheet (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Cash and cash equivalents	$ 10,718	$ 11,100	$ 13,366	$ 8,454
Accounts receivable, less allowance for doubtful accounts	83,619	73,191
Receivables from affiliates	0	0
Inventories	189,973	216,090
Other current assets	14,232	10,770
Disposal Group, Including Discontinued Operation, Assets, Current	0	37,140
Total current assets	298,542	348,291
Investment in joint venture	36,001	35,690
Intangible assets, net	8,709	10,250
Other noncurrent assets	15,276	14,909
Equity Method Investments		0
Receivables from affiliates	0	0
Property, plant and equipment, net	58,441	64,561
Disposal Group, Including Discontinued Operation, Assets, Noncurrent	0	19,805
Total assets	416,969	493,506
Accounts payable	50,468	45,606
Payables due to affiliates	0	0
Other current liabilities	39,175	28,111
Current portion of long-term debt	6,978	7,012
Disposal Group, Including Discontinued Operation, Liabilities, Current	0	11,158
Total current liabilities	96,621	91,887
Long-term debt, less current portion	268,546	310,614
Investment in subsidiary liability	0
Payables due to affiliates	0	0
Deferred income taxes	0	4,169
Other noncurrent liabilities	40,415	39,848
Stockholders’ equity (deficit)	11,387	46,988
Total liabilities and stockholders’ equity	416,969	493,506
Parent
Cash and cash equivalents	930	1,220	3,947	511
Accounts receivable, less allowance for doubtful accounts	45,149	39,448
Receivables from affiliates	1,021	759
Inventories	127,844	150,809
Other current assets	6,650	3,996
Disposal Group, Including Discontinued Operation, Assets, Current		0
Total current assets	181,594	196,232
Investment in joint venture	36,001	35,690
Intangible assets, net	8,599	10,116
Other noncurrent assets	11,861	11,642
Equity Method Investments		33,941
Receivables from affiliates	123,372	118,478
Property, plant and equipment, net	47,243	52,770
Disposal Group, Including Discontinued Operation, Assets, Noncurrent		0
Total assets	408,670	458,869
Accounts payable	32,849	32,707
Payables due to affiliates	1,021	759
Other current liabilities	31,941	21,121
Current portion of long-term debt	6,950	6,980
Disposal Group, Including Discontinued Operation, Liabilities, Current		0
Total current liabilities	72,761	61,567
Long-term debt, less current portion	268,538	310,599
Investment in subsidiary liability	16,900
Payables due to affiliates	0	0
Deferred income taxes	0	0
Other noncurrent liabilities	39,084	39,715
Stockholders’ equity (deficit)	11,387	46,988
Total liabilities and stockholders’ equity	408,670	458,869
Guarantors
Cash and cash equivalents	0	46	970	977
Accounts receivable, less allowance for doubtful accounts	9	9
Receivables from affiliates	0	36
Inventories	0	0
Other current assets	633	0
Disposal Group, Including Discontinued Operation, Assets, Current		37,140
Total current assets	642	37,231
Investment in joint venture	0	0
Intangible assets, net	0	0
Other noncurrent assets	0	0
Equity Method Investments		0
Receivables from affiliates	60,879	69,359
Property, plant and equipment, net	0	1
Disposal Group, Including Discontinued Operation, Assets, Noncurrent		19,805
Total assets	61,521	126,396
Accounts payable	0	0
Payables due to affiliates	0	0
Other current liabilities	1,396	1,412
Current portion of long-term debt	0	0
Disposal Group, Including Discontinued Operation, Liabilities, Current		11,158
Total current liabilities	1,396	12,570
Long-term debt, less current portion	0	0
Investment in subsidiary liability	0
Payables due to affiliates	8,932	14,123
Deferred income taxes	1,269	5,524
Other noncurrent liabilities	0	0
Stockholders’ equity (deficit)	49,924	94,179
Total liabilities and stockholders’ equity	61,521	126,396
Non-Guarantors
Cash and cash equivalents	9,788	9,834	8,449	6,966
Accounts receivable, less allowance for doubtful accounts	38,461	33,734
Receivables from affiliates	0	0
Inventories	62,197	65,349
Other current assets	6,949	6,774
Disposal Group, Including Discontinued Operation, Assets, Current		0
Total current assets	117,395	115,691
Investment in joint venture	0	0
Intangible assets, net	110	134
Other noncurrent assets	4,824	4,622
Equity Method Investments		0
Receivables from affiliates	0	0
Property, plant and equipment, net	11,198	11,790
Disposal Group, Including Discontinued Operation, Assets, Noncurrent		0
Total assets	133,527	132,237
Accounts payable	17,619	12,899
Payables due to affiliates	0	36
Other current liabilities	5,838	5,578
Current portion of long-term debt	28	32
Disposal Group, Including Discontinued Operation, Liabilities, Current		0
Total current liabilities	23,485	18,545
Long-term debt, less current portion	8	15
Investment in subsidiary liability	0
Payables due to affiliates	175,319	173,715
Deferred income taxes	0	0
Other noncurrent liabilities	1,331	133
Stockholders’ equity (deficit)	(66,616)	(60,171)
Total liabilities and stockholders’ equity	133,527	132,237
Eliminations
Cash and cash equivalents	0	0	$ 0	$ 0
Accounts receivable, less allowance for doubtful accounts	0	0
Receivables from affiliates	(1,021)	(795)
Inventories	(68)	(68)
Other current assets	0	0
Disposal Group, Including Discontinued Operation, Assets, Current		0
Total current assets	(1,089)	(863)
Investment in joint venture	0	0
Intangible assets, net	0	0
Other noncurrent assets	(1,409)	(1,355)
Equity Method Investments		(33,941)
Receivables from affiliates	(184,251)	(187,837)
Property, plant and equipment, net	0	0
Disposal Group, Including Discontinued Operation, Assets, Noncurrent		0
Total assets	(186,749)	(223,996)
Accounts payable	0	0
Payables due to affiliates	(1,021)	(795)
Other current liabilities	0	0
Current portion of long-term debt	0	0
Disposal Group, Including Discontinued Operation, Liabilities, Current		0
Total current liabilities	(1,021)	(795)
Long-term debt, less current portion	0	0
Investment in subsidiary liability	(16,900)
Payables due to affiliates	(184,251)	(187,838)
Deferred income taxes	(1,269)	(1,355)
Other noncurrent liabilities	0	0
Stockholders’ equity (deficit)	16,692	(34,008)
Total liabilities and stockholders’ equity	$ (186,749)	$ (223,996)