Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current assets:
Cash	$ 4,542	$ 3,039
Accounts receivable, net of allowance for doubtful accounts of $458 and $445, respectively	74,165	58,929
Inventories	57,449	54,530
Other current assets	10,221	9,176
Total current assets	146,377	125,674
Property, plant and equipment, net	125,742	121,089
Goodwill, net	8,959	8,624
Intangible asset, net	975	900
Non-current deferred tax assets	1,698	2,713
Other non-current assets	3,238	3,402
Total assets	286,989	262,402
Current liabilities:
Accounts payable	45,816	40,687
Accrued salaries, wages and benefits	11,215	11,761
Current maturities of long-term debt	13,752	10,477
Income taxes payable	2,496	1,340
Other current liabilities	6,453	5,119
Total current liabilities	79,732	69,384
Non-current deferred tax liabilities	3,936	3,844
Long-term debt, net of current portion	36,000	26,000
Other non-current liabilities	10,299	10,414
Total liabilities	129,967	109,642
Total stockholders' equity	157,022	152,760
Total liabilities and stockholders' equity	$ 286,989	$ 262,402