Guarantor Finanical Information Balance Sheet (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012
Cash and cash equivalents	$ 17,076	$ 30,829	$ 33,184	$ 21,607
Accounts receivable, less allowance for doubtful accounts	146,068	128,544
Receivables from affiliates	0	0
Inventories	222,194	214,900
Prepaid expenses and other current assets	19,036	16,418
Total current assets	404,374	390,691
Investment in joint venture	44,495	41,879
Goodwill	12,973	69,289
Intangible assets	63,576	69,489
Other assets	30,794	31,780
Investment in subsidiaries	0	0
Receivables from affiliates	0	0
Property, plant and equipment, net	74,552	76,694
Total assets	630,764	679,822
Accounts payable	89,436	69,577
Payables due to affiliates	0	0
Other current liabilities	31,643	31,367
Current portion of long-term debt	397	397
Total current liabilities	121,476	101,341
Long-term debt, less current portion	270,473	245,599
Payables due to affiliates	0	0
Deferred income taxes	4,365	10,733
Other non-current liabilities	10,999	12,255
Stockholders’ equity	223,451	309,894
Total liabilities and stockholders’ equity	630,764	679,822
Parent
Cash and cash equivalents	3,999	8,675	14,651	4,106
Accounts receivable, less allowance for doubtful accounts	74,095	67,536
Receivables from affiliates	2,982	2,811
Inventories	127,762	133,139
Prepaid expenses and other current assets	9,182	8,383
Total current assets	218,020	220,544
Investment in joint venture	44,495	41,879
Goodwill	0	41,504
Intangible assets	47,721	52,703
Other assets	27,476	28,145
Investment in subsidiaries	101,357	119,075
Receivables from affiliates	97,116	87,247
Property, plant and equipment, net	48,488	50,812
Total assets	584,673	641,909
Accounts payable	55,702	41,233
Payables due to affiliates	2,198	2,270
Other current liabilities	23,164	22,801
Current portion of long-term debt	371	371
Total current liabilities	81,435	66,675
Long-term debt, less current portion	270,449	245,561
Payables due to affiliates	0	0
Deferred income taxes	(1,471)	7,823
Other non-current liabilities	10,809	11,956
Stockholders’ equity	223,451	309,894
Total liabilities and stockholders’ equity	584,673	641,909
Guarantors
Cash and cash equivalents	1,237	495	232	903
Accounts receivable, less allowance for doubtful accounts	21,476	18,305
Receivables from affiliates	0	0
Inventories	18,995	16,357
Prepaid expenses and other current assets	1,643	2,244
Total current assets	43,351	37,401
Investment in joint venture	0	0
Goodwill	12,973	12,973
Intangible assets	0	0
Other assets	0	0
Investment in subsidiaries	0	0
Receivables from affiliates	35,657	34,637
Property, plant and equipment, net	12,347	12,855
Total assets	104,328	97,866
Accounts payable	10,161	8,274
Payables due to affiliates	0	0
Other current liabilities	925	944
Current portion of long-term debt	0	0
Total current liabilities	11,086	9,218
Long-term debt, less current portion	0	0
Payables due to affiliates	8,511	6,579
Deferred income taxes	6,929	7,061
Other non-current liabilities	0	0
Stockholders’ equity	77,802	75,008
Total liabilities and stockholders’ equity	104,328	97,866
Non-Guarantors
Cash and cash equivalents	11,840	21,659	18,301	16,598
Accounts receivable, less allowance for doubtful accounts	50,497	42,703
Receivables from affiliates	0	0
Inventories	75,505	65,472
Prepaid expenses and other current assets	8,413	5,993
Total current assets	146,255	135,827
Investment in joint venture	0	0
Goodwill	0	14,812
Intangible assets	15,855	16,786
Other assets	3,318	3,635
Investment in subsidiaries	0	0
Receivables from affiliates	1,195	1,465
Property, plant and equipment, net	13,717	13,027
Total assets	180,340	185,552
Accounts payable	23,573	20,070
Payables due to affiliates	784	541
Other current liabilities	7,554	7,622
Current portion of long-term debt	26	26
Total current liabilities	31,937	28,259
Long-term debt, less current portion	24	38
Payables due to affiliates	125,457	116,770
Deferred income taxes	(1,093)	(4,151)
Other non-current liabilities	190	299
Stockholders’ equity	23,825	44,337
Total liabilities and stockholders’ equity	180,340	185,552
Eliminations
Cash and cash equivalents	0	0	0	0
Accounts receivable, less allowance for doubtful accounts	0	0
Receivables from affiliates	(2,982)	(2,811)
Inventories	(68)	(68)
Prepaid expenses and other current assets	(202)	(202)
Total current assets	(3,252)	(3,081)
Investment in joint venture	0	0
Goodwill	0	0
Intangible assets	0	0
Other assets	0	0
Investment in subsidiaries	(101,357)	(119,075)
Receivables from affiliates	(133,968)	(123,349)
Property, plant and equipment, net	0	0
Total assets	(238,577)	(245,505)
Accounts payable	0	0
Payables due to affiliates	(2,982)	(2,811)
Other current liabilities	0	0
Current portion of long-term debt	0	0
Total current liabilities	(2,982)	(2,811)
Long-term debt, less current portion	0	0
Payables due to affiliates	(133,968)	(123,349)
Deferred income taxes	0	0
Other non-current liabilities	0	0
Stockholders’ equity	(101,627)	(119,345)
Total liabilities and stockholders’ equity	$ (238,577)	$ (245,505)