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Stockholders' Equity (ESPP) (Details) (ESPP, USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Jun. 30, 2015
Sep. 30, 2015
Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based compensation expense $ 73us-gaap_AllocatedShareBasedCompensationExpense $ 116us-gaap_AllocatedShareBasedCompensationExpense      
Expected dividend yield assumption (in Percent) 0.40%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate        
Expected volatility assumption (in Percent) 24.35%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate        
Risk-free interest rate assumption (in Percent) 0.02%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate        
Expected life assumption (in Years) 3 months        
Forecast
         
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Risk-free interest rate assumption (in Percent)     0.11%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_AwardTypeAxis
= csv_EmployeeStockPurchasePlanMember
/ us-gaap_StatementScenarioAxis
= us-gaap_ScenarioForecastMember
0.18%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_AwardTypeAxis
= csv_EmployeeStockPurchasePlanMember
/ us-gaap_StatementScenarioAxis
= us-gaap_ScenarioForecastMember
0.25%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_AwardTypeAxis
= csv_EmployeeStockPurchasePlanMember
/ us-gaap_StatementScenarioAxis
= us-gaap_ScenarioForecastMember
Expected life assumption (in Years)     6 months 9 months 1 year