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NET INVESTMENT IN SALES-TYPE LEASES (Narrative) (Details)	3 Months Ended
	Mar. 31, 2013
Investment [Line Items]
Sale Leaseback Transaction Lease Terms	Under sales-type leases, Xi'an TCH leased TRT systems to Zhangzhi with terms of 5 and 13 years, respectively; and leased CHPG systems to Tong Chuan, Shengwei, and Jing Yang Shengwei respectively for 5 years, BMPG systems to Pucheng for 15 years, BMPG systems to Shenqiu Phase I for 11 years, Shenqiu Phase II for 9.5 years, and a power and steam generating system from waste heat from metal refining to Erdos (five projects) for 20 years.

A description of the terms of the lease(s) related to the assets being leased-back in connection with the transaction involving the sale of property to another party and the lease of the property back to the seller.

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