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BORROWINGS (Long-Term Borrowings) (Details) |  |  | 1 Months Ended | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  |  |  |  |  |  |  |  |  |
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Dec. 31, 2014 USD ($) | Dec. 31, 2013 | Jan. 31, 2015 China Construction Bank [Member] Facility Two [Member] USD ($) | Jan. 31, 2015 China Construction Bank [Member] Facility Two [Member] CNY | Dec. 31, 2014 China Construction Bank [Member] Facility Two [Member] USD ($) | Dec. 31, 2014 China Construction Bank [Member] Facility Two [Member] CNY | Dec. 31, 2014 Huaxia Bank [Member] USD ($) | Dec. 31, 2014 Huaxia Bank [Member] CNY | Dec. 31, 2012 Huaxia Bank [Member] USD ($) | Dec. 31, 2012 Huaxia Bank [Member] CNY | Dec. 31, 2014 Huaxia Bank [Member] Facility One [Member] USD ($) | Dec. 31, 2014 Huaxia Bank [Member] Facility One [Member] CNY | Dec. 31, 2014 Huaxia Bank [Member] Facility Two [Member] USD ($) | Dec. 31, 2014 Huaxia Bank [Member] Facility Two [Member] CNY | Dec. 31, 2014 Bank of China [Member] USD ($) | Dec. 31, 2014 Bank of China [Member] CNY | Jun. 30, 2014 Bank of China [Member] USD ($) | Dec. 31, 2014 Chongqing Rural Commercial Bank [Member] USD ($) | Dec. 31, 2014 Chongqing Rural Commercial Bank [Member] CNY | Dec. 31, 2014 Bank Facilities [Member] USD ($) | Dec. 31, 2013 Bank Facilities [Member] USD ($) | Dec. 31, 2014 Bank Facilities [Member] China Construction Bank [Member] USD ($) | Dec. 31, 2013 Bank Facilities [Member] China Construction Bank [Member] USD ($) | Dec. 31, 2014 Bank Facilities [Member] Huaxia Bank [Member] USD ($) | Dec. 31, 2013 Bank Facilities [Member] Huaxia Bank [Member] USD ($) | Dec. 31, 2014 Bank Facilities [Member] Bank of China [Member] USD ($) | Dec. 31, 2013 Bank Facilities [Member] Bank of China [Member] USD ($) | Dec. 31, 2014 Bank Facilities [Member] Chongqing Rural Commercial Bank [Member] USD ($) | Dec. 31, 2013 Bank Facilities [Member] Chongqing Rural Commercial Bank [Member] USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Initiation date of credit facility |  |  |  |  | Jan. 21, 2009 | Jan. 21, 2009 | Sep. 28, 2011 | Sep. 28, 2011 |  |  |  |  |  |  | Sep. 30, 2011 | Sep. 30, 2011 |  | Oct. 26, 2011 | Oct. 26, 2011 |  |  |  |  |  |  |  |  |  |
Term of facility |  |  |  |  | 6 years | 6 years | 4 years | 4 years |  |  |  |  |  |  | 6 years | 6 years |  | 4 years | 4 years |  |  |  |  |  |  |  |  |  |
Maximum borrowing amount of credit facility |  |  |  |  | $ 64,400,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = dq_FacilityTwoMember / us-gaap_LineOfCreditFacilityAxis = dq_ChinaConstructionBankMember | 400,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = dq_FacilityTwoMember / us-gaap_LineOfCreditFacilityAxis = dq_ChinaConstructionBankMember | $ 64,400,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_LineOfCreditFacilityAxis = dq_HuaxiaBankMember | 400,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_LineOfCreditFacilityAxis = dq_HuaxiaBankMember |  |  |  |  |  |  | $ 120,800,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_LineOfCreditFacilityAxis = dq_BankOfChinaMember | 750,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_LineOfCreditFacilityAxis = dq_BankOfChinaMember |  | $ 39,600,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_LineOfCreditFacilityAxis = dq_ChongqingRuralCommercialBankMember | 245,500,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_LineOfCreditFacilityAxis = dq_ChongqingRuralCommercialBankMember |  |  |  |  |  |  |  |  |  |
Interest rate spread over rate issued by People's Bank of China |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LineOfCreditFacilityAxis = dq_BankOfChinaMember | 5.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LineOfCreditFacilityAxis = dq_BankOfChinaMember |  | 10.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LineOfCreditFacilityAxis = dq_ChongqingRuralCommercialBankMember | 10.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LineOfCreditFacilityAxis = dq_ChongqingRuralCommercialBankMember |  |  |  |  |  |  |  |  |  |
Amount drawn down |  |  |  |  | 64,400,000 us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod / us-gaap_CreditFacilityAxis = dq_FacilityTwoMember / us-gaap_LineOfCreditFacilityAxis = dq_ChinaConstructionBankMember | 400,000,000 us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod / us-gaap_CreditFacilityAxis = dq_FacilityTwoMember / us-gaap_LineOfCreditFacilityAxis = dq_ChinaConstructionBankMember | 61,200,000 us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod / us-gaap_LineOfCreditFacilityAxis = dq_HuaxiaBankMember | 380,000,000 us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod / us-gaap_LineOfCreditFacilityAxis = dq_HuaxiaBankMember |  |  | 20,900,000 us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod / us-gaap_CreditFacilityAxis = dq_FacilityOneMember / us-gaap_LineOfCreditFacilityAxis = dq_HuaxiaBankMember | 130,000,000 us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod / us-gaap_CreditFacilityAxis = dq_FacilityOneMember / us-gaap_LineOfCreditFacilityAxis = dq_HuaxiaBankMember | 40,300,000 us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod / us-gaap_CreditFacilityAxis = dq_FacilityTwoMember / us-gaap_LineOfCreditFacilityAxis = dq_HuaxiaBankMember | 250,000,000 us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod / us-gaap_CreditFacilityAxis = dq_FacilityTwoMember / us-gaap_LineOfCreditFacilityAxis = dq_HuaxiaBankMember | 120,800,000 us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod / us-gaap_LineOfCreditFacilityAxis = dq_BankOfChinaMember | 750,000,000 us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod / us-gaap_LineOfCreditFacilityAxis = dq_BankOfChinaMember |  | 39,600,000 us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod / us-gaap_LineOfCreditFacilityAxis = dq_ChongqingRuralCommercialBankMember | 245,500,000 us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod / us-gaap_LineOfCreditFacilityAxis = dq_ChongqingRuralCommercialBankMember |  |  |  |  |  |  |  |  |  |
Amount repaid |  |  | 6,400,000 us-gaap_RepaymentsOfLinesOfCredit / us-gaap_CreditFacilityAxis = dq_FacilityTwoMember / us-gaap_LineOfCreditFacilityAxis = dq_ChinaConstructionBankMember | 40,000,000 us-gaap_RepaymentsOfLinesOfCredit / us-gaap_CreditFacilityAxis = dq_FacilityTwoMember / us-gaap_LineOfCreditFacilityAxis = dq_ChinaConstructionBankMember | 58,000,000 us-gaap_RepaymentsOfLinesOfCredit / us-gaap_CreditFacilityAxis = dq_FacilityTwoMember / us-gaap_LineOfCreditFacilityAxis = dq_ChinaConstructionBankMember | 360,000,000 us-gaap_RepaymentsOfLinesOfCredit / us-gaap_CreditFacilityAxis = dq_FacilityTwoMember / us-gaap_LineOfCreditFacilityAxis = dq_ChinaConstructionBankMember | 38,700,000 us-gaap_RepaymentsOfLinesOfCredit / us-gaap_LineOfCreditFacilityAxis = dq_HuaxiaBankMember | 240,000,000 us-gaap_RepaymentsOfLinesOfCredit / us-gaap_LineOfCreditFacilityAxis = dq_HuaxiaBankMember |  |  |  |  |  |  | 19,300,000 us-gaap_RepaymentsOfLinesOfCredit / us-gaap_LineOfCreditFacilityAxis = dq_BankOfChinaMember | 120,000,000 us-gaap_RepaymentsOfLinesOfCredit / us-gaap_LineOfCreditFacilityAxis = dq_BankOfChinaMember |  | 26,600,000 us-gaap_RepaymentsOfLinesOfCredit / us-gaap_LineOfCreditFacilityAxis = dq_ChongqingRuralCommercialBankMember | 165,000,000 us-gaap_RepaymentsOfLinesOfCredit / us-gaap_LineOfCreditFacilityAxis = dq_ChongqingRuralCommercialBankMember |  |  |  |  |  |  |  |  |  |
Fixed interest rate |  |  |  |  |  |  |  |  |  |  | 6.65%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_CreditFacilityAxis = dq_FacilityOneMember / us-gaap_LineOfCreditFacilityAxis = dq_HuaxiaBankMember | 6.65%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_CreditFacilityAxis = dq_FacilityOneMember / us-gaap_LineOfCreditFacilityAxis = dq_HuaxiaBankMember | 6.90%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_CreditFacilityAxis = dq_FacilityTwoMember / us-gaap_LineOfCreditFacilityAxis = dq_HuaxiaBankMember | 6.90%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_CreditFacilityAxis = dq_FacilityTwoMember / us-gaap_LineOfCreditFacilityAxis = dq_HuaxiaBankMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of collateral |  |  |  |  |  |  | 8,700,000 us-gaap_DebtInstrumentCollateralAmount / us-gaap_LineOfCreditFacilityAxis = dq_HuaxiaBankMember |  |  |  |  |  |  |  |  |  | 103,400,000 us-gaap_DebtInstrumentCollateralAmount / us-gaap_LineOfCreditFacilityAxis = dq_BankOfChinaMember |  |  |  |  |  |  |  |  |  |  |  |
Amount available for future draw down |  |  |  |  |  |  |  |  | 3,200,000 us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity / us-gaap_LineOfCreditFacilityAxis = dq_HuaxiaBankMember | 20,000,000 us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity / us-gaap_LineOfCreditFacilityAxis = dq_HuaxiaBankMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average interest rate | 6.90%us-gaap_LongtermDebtWeightedAverageInterestRate | 7.20%us-gaap_LongtermDebtWeightedAverageInterestRate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term bank borrowings | $ 146,697,029 us-gaap_LongTermDebt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 146,697,029 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember | $ 184,920,130 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember | $ 6,444,680 us-gaap_LongTermDebt / us-gaap_LineOfCreditFacilityAxis = dq_ChinaConstructionBankMember / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember | $ 7,102,783 us-gaap_LongTermDebt / us-gaap_LineOfCreditFacilityAxis = dq_ChinaConstructionBankMember / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember | $ 25,778,720 us-gaap_LongTermDebt / us-gaap_LineOfCreditFacilityAxis = dq_HuaxiaBankMember / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember | $ 35,679,096 us-gaap_LongTermDebt / us-gaap_LineOfCreditFacilityAxis = dq_HuaxiaBankMember / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember | $ 101,503,710 us-gaap_LongTermDebt / us-gaap_LineOfCreditFacilityAxis = dq_BankOfChinaMember / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember | $ 123,885,750 us-gaap_LongTermDebt / us-gaap_LineOfCreditFacilityAxis = dq_BankOfChinaMember / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember | $ 12,969,919 us-gaap_LongTermDebt / us-gaap_LineOfCreditFacilityAxis = dq_ChongqingRuralCommercialBankMember / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember | $ 18,252,501 us-gaap_LongTermDebt / us-gaap_LineOfCreditFacilityAxis = dq_ChongqingRuralCommercialBankMember / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember

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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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