This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

+ Details

Name:	us-gaap_AssetsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents investments accounted for under the equity method of accounting as of the balance sheet date.

+ References

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

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 18

-Paragraph 6

-Subparagraph 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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 25

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6903542&loc=d3e32014-111567

+ Details

Name:	us-gaap_EquityMethodInvestmentsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of gain (loss) recognized in earnings in the period from the increase (decrease) in fair value of foreign currency derivatives not designated as hedging instruments.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5618551-113959

Reference 2: 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 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 44

-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.

+ Details

Name:	us-gaap_GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

This element represents the aggregate of the liabilities reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

+ References

+ Details

Name:	us-gaap_LiabilitiesFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

+ Details

Name:	us-gaap_LongTermDebtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

FAIR VALUE MEASUREMENT (Details) (USD $)	12 Months Ended
FAIR VALUE MEASUREMENT (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Fair value measurements of the entity's assets or liabilities that are measured at fair value on a recurring basis
Long-term bank borrowings	$ 214,562,963
Gain (loss) on foreign currency derivative contracts	(4,369,173)	(5,750,981)	1,656,928
Recurring basis \| Total Fair Value and Carrying Value on the Balance Sheet
Fair value measurements of the entity's assets or liabilities that are measured at fair value on a recurring basis
Total Assets	1,350,657	2,726,538
Total Liabilities	365,226
Recurring basis \| Total Fair Value and Carrying Value on the Balance Sheet \| Foreign exchange option contracts
Fair value measurements of the entity's assets or liabilities that are measured at fair value on a recurring basis
Total Assets	100,837	479,333
Recurring basis \| Total Fair Value and Carrying Value on the Balance Sheet \| Foreign exchange forward contracts
Fair value measurements of the entity's assets or liabilities that are measured at fair value on a recurring basis
Total Assets	1,249,820	2,247,205
Total Liabilities	365,226
Recurring basis \| Significant Other Observable Inputs (Level 2)
Fair value measurements of the entity's assets or liabilities that are measured at fair value on a recurring basis
Total Assets	1,350,657	2,726,538
Total Liabilities	365,226
Recurring basis \| Significant Other Observable Inputs (Level 2) \| Foreign exchange option contracts
Fair value measurements of the entity's assets or liabilities that are measured at fair value on a recurring basis
Total Assets	100,837	479,333
Recurring basis \| Significant Other Observable Inputs (Level 2) \| Foreign exchange forward contracts
Fair value measurements of the entity's assets or liabilities that are measured at fair value on a recurring basis
Total Assets	1,249,820	2,247,205
Total Liabilities	365,226
Non-recurring basis \| Significant Unobservable Inputs (Level 3)
Fair value measurements of the entity's assets or liabilities that are measured at fair value on a recurring basis
Equity method investment, before impairment	$ 1,100,000		$ 3,000,000