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Preneed Trust Investments (Purchases and sales of investments in preneed funeral trusts) (Details) - Preneed Funeral 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 $ (12,129) $ (9,144) $ (31,325) $ (19,584)
Sales $ 11,393 $ 9,424 $ 24,994 $ 23,636