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Preneed Trust Investments (Purchases and sales of investments in preneed cemetery trusts) (Details) - Preneed Cemetery Trust Investments [Member] - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Debt and Equity Securities, FV-NI [Line Items]        
Purchases $ (13,488) $ (8,165) $ (33,299) $ (18,423)
Sales $ 11,672 $ 8,878 $ 24,690 $ 22,776