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Income Taxes - Additional Information (Detail) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Income Tax Contingency [Line Items] |  |  |
Decrease in effective tax rate due to valuation allowance, percentage | 39.00%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance | 86.20%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance | 2.40%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance
Decrease in effective tax rate due to valuation allowance, amount | $ 71,800,000 us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance | $ 80,500,000 us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance |
Increase in effective tax rate |  | 13.20%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate | 6.80%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate
Effective income tax rate include non-deductible goodwill and asset impairment charge |  |  | 73,600,000 us-gaap_IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses
Nondeductible goodwill | 1.10%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense | 3.50%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense | 39.60%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense
Unrecognized tax benefits that would impact effective tax rate | 8,000,000 us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate | 12,700,000 us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate |
Short-term reserves | 1,400,000 ceco_TaxAdjustmentsSettlementsAndUnusualProvisionsCurrent |  |
Long-term reserves | 7,900,000 ceco_TaxAdjustmentsSettlementsAndUnusualProvisionsNoncurrent |  |
Interest and penalties | 2,820,000 us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense | 3,107,000 us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense | 3,794,000 us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense
Gross unrecognized tax benefits change range, minimum | 0 us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleEstimatedRangeOfChangeLowerBound |  |
Gross unrecognized tax benefits change range, maximum | 2,000,000 us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleEstimatedRangeOfChangeUpperBound |  |
Net operating loss carry forwards, for state income tax purposes | 247,900,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal |  |
Net operating loss carry forwards, for federal income tax purposes | 63,900,000 ceco_DeferredTaxAssetsOperatingLossCarryforwardsFederal |  |
Increase in deferred tax valuation allowance | 67,500,000 us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount | 82,900,000 us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount |
Total deferred tax valuation allowance | 71,800,000 us-gaap_DeferredTaxAssetsValuationAllowance | 72,200,000 us-gaap_DeferredTaxAssetsValuationAllowance |
Foreign tax credit | 6,300,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign |  |
Operating loss carry forwards | 34,067,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards | 7,220,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards |
Total valuation allowance | 150,400,000 ceco_ValuationAllowance |  |
Decrease in valuation allowance deferred tax adjustments | 4,300,000 us-gaap_IncomeTaxReconciliationOtherAdjustments |  |
Domestic Country [Member] |  |  |
Income Tax Contingency [Line Items] |  |  |
Operating loss carrybacks | 97,500,000 ceco_OperatingLossCarrybacks / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember |  |
Tax refund due to carryback of losses | 14,100,000 ceco_TaxRefundDueToCarryBackOfLosses / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember |  |
Increase in overall domestic loss account | 52,300,000 ceco_IncreaseInDomesticLossAccountDueToFederalNetOperatingLossCarryback / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember |  |
Foreign Tax Authority [Member] |  |  |
Income Tax Contingency [Line Items] |  |  |
Reduction in tax attributable to future domestic income | 18,300,000 ceco_ReductionInTaxAttributableToFutureDomesticIncome / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember |  |
State and Local Jurisdiction [Member] |  |  |
Income Tax Contingency [Line Items] |  |  |
Operating loss carrybacks | 3,500,000 ceco_OperatingLossCarrybacks / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember |  |
Tax refund due to carryback of losses | 200,000 ceco_TaxRefundDueToCarryBackOfLosses / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember |  |
Maximum [Member] |  |  |
Income Tax Contingency [Line Items] |  |  |
Unrecognized tax benefits, income tax penalties and interest benefit/expense recognized | 100,000 ceco_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpenseRecognized / us-gaap_RangeAxis = us-gaap_MaximumMember | 700,000 ceco_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpenseRecognized / us-gaap_RangeAxis = us-gaap_MaximumMember | 500,000 ceco_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpenseRecognized / us-gaap_RangeAxis = us-gaap_MaximumMember
Continuing Operation [Member] |  |  |
Income Tax Contingency [Line Items] |  |  |
Total valuation allowance | 96,300,000 ceco_ValuationAllowance / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember |  |
Discontinued Operation [Member] |  |  |
Income Tax Contingency [Line Items] |  |  |
Total valuation allowance | $ 54,100,000 ceco_ValuationAllowance / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember |  |

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