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Property, Plant and Equipment (Details Textual) (USD $)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2011
Chemical processing plants and plant infrastructure [Member]
Y
Dec. 31, 2011
Production, fabrication, and assembly equipment [Member]
Y
Dec. 31, 2011
Processing plant components [Member]
Y
Dec. 31, 2011
Trucks automobiles trailers and other rolling stock [Member]
Y
Machinery and Equipment [Line Items]            
Useful lives in years, Minimum     15 7 3 3
Useful lives in years, Maximum     30 15 10 7
Property plant and equipment (Textual) [Abstract]            
Accumulated amortization for assets capitalized under capital leases $ 718,000 $ 627,000