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INCOME TAX (Schedule of Effective Tax Rate) (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Schedule Of Effective Tax Rate [Line Items]
U.S. statutory rates	34.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	34.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Tax rate difference - current provision	(9.50%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	(9.70%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
Effective tax holiday	(8.00%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxHolidays	(9.50%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxHolidays
Prior periods income tax adjustment per income tax return filed	1.40%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	3.30%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther
Other	0.40%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments	(0.30%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments
Effect of tax rate change on deferred tax items	3.50%creg_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxItems	9.70%creg_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxItems
Valuation allowance on PRC NOL	0.00%us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsOther	0.00%us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsOther
Valuation allowance on US NOL	1.90%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	2.80%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance
Tax per financial statements	23.70%us-gaap_EffectiveIncomeTaxRateContinuingOperations	30.30%us-gaap_EffectiveIncomeTaxRateContinuingOperations

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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