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Income Taxes (Narrative) (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Operating Loss Carryforwards [Line Items]        
Unrecognized tax benefits, decrease resulting from settlements with taxing authorities $ 7,300,000us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities      
Increase in income tax benefit (1,700,000)us-gaap_IncreaseDecreaseInIncomeTaxes      
Unrecognized tax benefits, increase resulting from settlements with taxing authorities 5,600,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromSettlementsWithTaxingAuthorities      
Unrecognized tax benefits, decrease to interest on income tax expense 600,000csv_UnrecognizedTaxBenefitsDecreasetoInterestonIncomeTaxExpense      
Change in valuation allowance 138,000us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount      
Unrecognized tax benefits 515,000us-gaap_UnrecognizedTaxBenefits 7,832,000us-gaap_UnrecognizedTaxBenefits 7,747,000us-gaap_UnrecognizedTaxBenefits 7,617,000us-gaap_UnrecognizedTaxBenefits
State        
Operating Loss Carryforwards [Line Items]        
Operating loss carryforwards 57,100,000us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember		      
Federal        
Operating Loss Carryforwards [Line Items]        
Income tax deductions $ 1,600,000csv_UnrecognizedTaxBenefirtSummaryOfPositionsCumulativeDeductionsTaken
/ us-gaap_IncomeTaxAuthorityAxis
= csv_FederalMember