FAIR VALUE MEASUREMENT (Details) (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Fair value measurements of the entity's assets or liabilities that are measured at fair value on a recurring basis
Carrying value	$ 3,072,423,650us-gaap_Assets	$ 2,453,735,356us-gaap_Assets
Impairment charges on investments	0us-gaap_ImpairmentOfInvestments	0us-gaap_ImpairmentOfInvestments	1,100,000us-gaap_ImpairmentOfInvestments
Impairment charge recognized as investment loss			1,081,700
Long-term bank borrowings	134,299,521us-gaap_LongTermDebtFairValue	151,391,572us-gaap_LongTermDebtFairValue
Convertible notes	150,000,000us-gaap_ConvertibleLongTermNotesPayable
Gain (loss) on foreign currency derivative contracts	19,656,236	10,764,226	(4,369,173)
Carrying amount
Fair value measurements of the entity's assets or liabilities that are measured at fair value on a recurring basis
Convertible notes	150,000,000
Wafer sorting machine and other fixed assets
Fair value measurements of the entity's assets or liabilities that are measured at fair value on a recurring basis
Impairment charges on investments	1,567,954
Foreign exchange forward contracts
Fair value measurements of the entity's assets or liabilities that are measured at fair value on a recurring basis
Gain (loss) on foreign currency derivative contracts	19,656,236	10,764,226	(4,369,173)
Recurring basis \| Total Fair Value and Carrying Value on the Balance Sheets \| 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	9,642,728	7,323,422
Total Liabilities	445,222	597,089
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	9,642,728	7,323,422
Total Liabilities	445,222	597,089
Non-recurring basis \| Significant Unobservable Inputs (Level 3) \| Mono-crystalline ingot furnaces
Fair value measurements of the entity's assets or liabilities that are measured at fair value on a recurring basis
Carrying value		5,800,000
Total Assets		2,100,000
Impairment charges on investments		$ 3,700,000

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.18)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

-Publisher FASB

-Name Accounting Standards Codification

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

-Publisher SEC

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-Number 210

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-Article 7

Reference 4: http://www.xbrl.org/2003/role/presentationRef

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-Name Regulation S-X (SX)

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Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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

-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

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Carrying value as of the balance sheet date of long-term debt (with maturities initially due after one year or beyond the operating cycle if longer) identified as Convertible Notes Payable, excluding current portion. Convertible Notes Payable is a written promise to pay a note which can be exchanged for a specified amount of another, related security, at the option of the issuer and the holder.

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This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 35

-Paragraph 32

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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.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4A

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The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

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Fair value of financial and nonfinancial obligations.

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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.

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