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Cemetery Perpetual Care Trusts Investment Related Activities (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Investment related activities [Line Items]    
Realized gains from sales of available-for-sale securities $ 11,882us-gaap_AvailableForSaleSecuritiesGrossRealizedGains $ 46,678us-gaap_AvailableForSaleSecuritiesGrossRealizedGains
Realized losses from sales of available-for-sale securities (11,892)us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses (4,110)us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses
Cemetery Perpetual Care    
Investment related activities [Line Items]    
Deposits 9,253sci_DepositsToTrust
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryPerpetualCareMember
11,837sci_DepositsToTrust
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryPerpetualCareMember
Withdrawals 13,158sci_WithdrawalsFromTrust
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryPerpetualCareMember
5,885sci_WithdrawalsFromTrust
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryPerpetualCareMember
Purchases of available-for-sale securities 101,660us-gaap_PaymentsToAcquireAvailableForSaleSecurities
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryPerpetualCareMember
38,895us-gaap_PaymentsToAcquireAvailableForSaleSecurities
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryPerpetualCareMember
Sales of available-for-sale securities 53,765us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryPerpetualCareMember
30,072us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryPerpetualCareMember
Realized gains from sales of available-for-sale securities 398us-gaap_AvailableForSaleSecuritiesGrossRealizedGains
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryPerpetualCareMember
5,045us-gaap_AvailableForSaleSecuritiesGrossRealizedGains
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryPerpetualCareMember
Realized losses from sales of available-for-sale securities $ (129)us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryPerpetualCareMember
$ (337)us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryPerpetualCareMember