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Note 13 - Income Taxes (Details) (USD $)
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Note 13 - Income Taxes (Details) [Line Items]        
Operating Loss Carryforwards $ 12,000,000us-gaap_OperatingLossCarryforwards      
Deferred Tax Liabilities, Undistributed Foreign Earnings 25,300,000us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings      
Undistributed Earnings of Foreign Subsidiaries 855,300,000us-gaap_UndistributedEarningsOfForeignSubsidiaries      
Deferred Tax Assets, Valuation Allowance 49,523,000us-gaap_DeferredTaxAssetsValuationAllowance      
Unrecognized Tax Benefits 679,000us-gaap_UnrecognizedTaxBenefits 679,000us-gaap_UnrecognizedTaxBenefits 679,000us-gaap_UnrecognizedTaxBenefits 679,000us-gaap_UnrecognizedTaxBenefits
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued 300,000us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued 300,000us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued    
Capital Losses Not Expected To Be Realized [Member]        
Note 13 - Income Taxes (Details) [Line Items]        
Deferred Tax Assets, Valuation Allowance $ 49,500,000us-gaap_DeferredTaxAssetsValuationAllowance
/ us-gaap_ValuationAllowancesAndReservesTypeAxis
= cveo_CapitalLossesNotExpectedToBeRealizedMember