Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Current assets:
Cash	$ 21,409	$ 37,317
Accounts receivable, net	114,819	97,510
Inventories	87,928	91,469
Other current assets	16,590	16,503
Total current assets	240,746	242,799
Property, plant and equipment, net	272,047	278,442
Goodwill, net	85,436	83,941
Intangible asset, net	52,929	52,827
Investment in joint venture	38,240	34,703
Other non-current assets	19,542	20,001
Total assets	708,940	712,713
Current liabilities:
Accounts payable	63,616	71,094
Accrued salaries, wages and benefits	19,760	21,148
Current maturities of long-term debt	23,345	22,160
Income taxes payable	5,057	3,274
Current portion of obligations under capital lease	5,482	5,418
Other current liabilities	11,481	14,504
Total current liabilities	128,741	137,598
Non-current deferred tax liabilities	48,238	49,461
Long-term debt, net of current portion	335,938	328,026
Obligations under capital lease, net of current portion	11,829	14,539
Other non-current liabilities	10,692	9,390
Total liabilities	535,438	539,014
Total stockholders' equity	173,502	173,699
Total liabilities and stockholders' equity	$ 708,940	$ 712,713