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FAIR VALUE MEASUREMENT (Details 3) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Effect of derivative instruments on consolidated statements of operations
Amount of Gain (Loss) Recognized in Income on Derivatives	$ (4,369,173)	$ (5,750,981)	$ 1,656,928
Foreign exchange option contracts
Effect of derivative instruments on consolidated statements of operations
Amount of Gain (Loss) Recognized in Income on Derivatives	428,340	(6,933,353)	6,636,821
Foreign exchange forward contracts
Effect of derivative instruments on consolidated statements of operations
Amount of Gain (Loss) Recognized in Income on Derivatives	$ (4,797,513)	$ 1,182,372	$ (4,979,893)

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- Definition

Net gain (loss) from the increase (decrease) in fair value of derivative instrument not designated as hedging instrument.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 45

-Subparagraph b(1)(b)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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