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Preneed Trust Investments (Components of preneed funeral trust investments) (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Preneed funeral trust investments $ 90,051 $ 90,682
Preneed Funeral Trust Investments [Member]    
Schedule of Trading Securities and Other Trading Assets [Line Items]    
Preneed funeral trust investments, at fair value 92,816 93,341
Less: allowance for contract cancellation (2,765) (2,659)
Preneed funeral trust investments $ 90,051 $ 90,682