Annual report pursuant to section 13 and 15(d)

COMMITMENTS AND CONTINGENCIES (Details)

COMMITMENTS AND CONTINGENCIES (Details)	12 Months Ended						12 Months Ended
COMMITMENTS AND CONTINGENCIES (Details)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2013 Railcars [Member] USD ($) Railcar	Dec. 31, 2013 Office Space in Sugar Land, TX [Member] USD ($)	Dec. 31, 2010 Contamination of Real Property [Member] USD ($)	Dec. 31, 2013 Threatened Litigation [Member] Exposure to Asbestos [Member] Defendant Lawsuit Claim	Dec. 31, 2013 Notes Payable Guarantee [Member] USD ($)	Dec. 31, 2012 Notes Payable Guarantee [Member] USD ($)	Dec. 31, 2011 Notes Payable Guarantee [Member] USD ($)	Oct. 24, 2010 Saudi Industrial Development Fund Limited Guarantee [Member] USD ($)	Oct. 24, 2010 Saudi Industrial Development Fund Limited Guarantee [Member] SAR
Guarantor Obligations [Line Items]
Guarantor obligations								$ 160,000
Limited partnership ownership interest (in hundredths)								19.00%
Accrued liabilities current	3,048,000	2,687,000							66,570	66,570
Loan guarantee, maximum (in hundredths)											41.00%	41.00%
Principal amount of loan guaranteed											88,000,000	330,000,000
Amount of maximum exposure											36,080,000	135,300,000
Loss Contingencies [Line Items]
Number of defendants							44
Number of lawsuits							3
Accrued recorded value	1,100,000
Number of claims for which no accruals were recorded							4
Site Contingency [Line Items]
Accrual for environmental remediation	203,000					350,000
Expenses for environmental monitoring, compliance, and improvements	386,000	404,000	543,000
Advance payment to be made to contractor	250,000
Operating Leases, Future Minimum Payments Receivable [Abstract]
Operating Leases, Future Minimum Payments Receivable, in Two Years	1,742,000
Operating Leases, Future Minimum Payments Receivable, Current	1,639,000
Operating Leases, Future Minimum Payments Receivable, in Three Years	1,369,000
Operating Leases, Future Minimum Payments Receivable, in Four Years	606,000
Operating Leases, Future Minimum Payments Receivable, in Five Years	203,000
Operating Leases, Future Minimum Payments Receivable, Thereafter	131,000
Operating Leases, Future Minimum Payments Receivable	5,690,000
Operating Leased Assets [Line Items]
Number Of Railcars				200
Operating lease expiration date				Dec. 31, 2020	Dec. 31, 2018
Total commitments under operating leases				5,300,000	400,000
Operating Lease Period				7 years
Operating lease, rental expense	$ 1,800,000	$ 1,700,000	$ 1,000,000