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Pensions (Details 2) (Multi-employer pension plan, Payroll and benefits payable, USD $)
In Millions, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Multi-employer pension plan | Payroll and benefits payable
    
Multi-employer pension plan    
Accrued plan liability $ 1.0us-gaap_DefinedBenefitPensionPlanLiabilitiesCurrent
/ us-gaap_BalanceSheetLocationAxis
= ccc_PayrollAndBenefitsPayableMember
/ us-gaap_MultiemployerPlanTypeAxis
= us-gaap_MultiemployerPlansPensionMember		 $ 0.9us-gaap_DefinedBenefitPensionPlanLiabilitiesCurrent
/ us-gaap_BalanceSheetLocationAxis
= ccc_PayrollAndBenefitsPayableMember
/ us-gaap_MultiemployerPlanTypeAxis
= us-gaap_MultiemployerPlansPensionMember