Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data	Sep. 30, 2011	Dec. 31, 2010
Current assets:
Allowance for doubtful accounts receivables	$ 740	$ 509
Accumulated Depreciation of property, plant and equipment	40,487	27,712
Accumulated amortization of intangible assets	6,915	4,498
Accumulated amortization of deferred financing costs	$ 265	$ 506
Stockholders' equity
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	51,886,574	47,499,074
Common stock, shares outstanding	51,886,574	47,499,074