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Preneed Funeral Activities Investment Related Activities (Details) (Funeral [Member], USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Funeral [Member]
     
Investment related activities [Line Items]      
Deposits to trust $ 102,553sci_DepositsToTrust
/ us-gaap_StatementBusinessSegmentsAxis
= sci_FuneralMember
$ 82,168sci_DepositsToTrust
/ us-gaap_StatementBusinessSegmentsAxis
= sci_FuneralMember
$ 81,601sci_DepositsToTrust
/ us-gaap_StatementBusinessSegmentsAxis
= sci_FuneralMember
Withdrawals 131,352sci_WithdrawalsFromTrust
/ us-gaap_StatementBusinessSegmentsAxis
= sci_FuneralMember
125,914sci_WithdrawalsFromTrust
/ us-gaap_StatementBusinessSegmentsAxis
= sci_FuneralMember
100,635sci_WithdrawalsFromTrust
/ us-gaap_StatementBusinessSegmentsAxis
= sci_FuneralMember
Purchases of available-for-sale securities 1,238,257us-gaap_PaymentsToAcquireAvailableForSaleSecurities
/ us-gaap_StatementBusinessSegmentsAxis
= sci_FuneralMember
393,169us-gaap_PaymentsToAcquireAvailableForSaleSecurities
/ us-gaap_StatementBusinessSegmentsAxis
= sci_FuneralMember
563,628us-gaap_PaymentsToAcquireAvailableForSaleSecurities
/ us-gaap_StatementBusinessSegmentsAxis
= sci_FuneralMember
Sales of available-for-sale securities 1,318,512us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities
/ us-gaap_StatementBusinessSegmentsAxis
= sci_FuneralMember
435,267us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities
/ us-gaap_StatementBusinessSegmentsAxis
= sci_FuneralMember
555,709us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities
/ us-gaap_StatementBusinessSegmentsAxis
= sci_FuneralMember
Realized gains from sales of available-for-sale securities 168,567us-gaap_AvailableForSaleSecuritiesGrossRealizedGains
/ us-gaap_StatementBusinessSegmentsAxis
= sci_FuneralMember
65,011us-gaap_AvailableForSaleSecuritiesGrossRealizedGains
/ us-gaap_StatementBusinessSegmentsAxis
= sci_FuneralMember
60,833us-gaap_AvailableForSaleSecuritiesGrossRealizedGains
/ us-gaap_StatementBusinessSegmentsAxis
= sci_FuneralMember
Realized losses from sales of available-for-sale securities $ (113,748)us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses
/ us-gaap_StatementBusinessSegmentsAxis
= sci_FuneralMember
$ (9,732)us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses
/ us-gaap_StatementBusinessSegmentsAxis
= sci_FuneralMember
$ (21,454)us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses
/ us-gaap_StatementBusinessSegmentsAxis
= sci_FuneralMember