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Preneed Cemetery Activities Investment Related Activities (Details) (Cemetery [Member], USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Cemetery [Member]
     
Investment related activities [Line Items]      
Deposits to trust $ 129,581sci_DepositsToTrust
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryMember
$ 106,185sci_DepositsToTrust
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryMember
$ 98,130sci_DepositsToTrust
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryMember
Withdrawals 150,064sci_WithdrawalsFromTrust
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryMember
119,576sci_WithdrawalsFromTrust
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryMember
98,738sci_WithdrawalsFromTrust
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryMember
Purchases of available-for-sale securities 1,786,800us-gaap_PaymentsToAcquireAvailableForSaleSecurities
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryMember
477,772us-gaap_PaymentsToAcquireAvailableForSaleSecurities
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryMember
746,761us-gaap_PaymentsToAcquireAvailableForSaleSecurities
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryMember
Sales of available-for-sale securities 1,842,417us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryMember
498,852us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryMember
700,091us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryMember
Realized gains from sales of available-for-sale securities 271,507us-gaap_AvailableForSaleSecuritiesGrossRealizedGains
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryMember
101,337us-gaap_AvailableForSaleSecuritiesGrossRealizedGains
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryMember
87,665us-gaap_AvailableForSaleSecuritiesGrossRealizedGains
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryMember
Realized losses from sales of available-for-sale securities $ (138,473)us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryMember
$ (14,593)us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryMember
$ (29,397)us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses
/ us-gaap_StatementBusinessSegmentsAxis
= sci_CemeteryMember