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Preneed Cemetery Activities 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    
Investment related activities [Line Items]    
Deposits 35,161sci_DepositsToTrust
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryMember
28,271sci_DepositsToTrust
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryMember
Withdrawals 31,226sci_WithdrawalsFromTrust
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryMember
34,348sci_WithdrawalsFromTrust
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryMember
Purchases of available-for-sale securities 106,937us-gaap_PaymentsToAcquireAvailableForSaleSecurities
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryMember
98,758us-gaap_PaymentsToAcquireAvailableForSaleSecurities
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryMember
Sales of available-for-sale securities 99,262us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryMember
92,317us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryMember
Realized gains from sales of available-for-sale securities 7,135us-gaap_AvailableForSaleSecuritiesGrossRealizedGains
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryMember
25,532us-gaap_AvailableForSaleSecuritiesGrossRealizedGains
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryMember
Realized losses from sales of available-for-sale securities $ (7,028)us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryMember
$ (2,299)us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryMember