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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 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Debt and Equity Securities, FV-NI [Line Items]        
Purchases $ (8,186) $ (6,882) $ (19,812) $ (10,258)
Sales $ 10,026 $ 6,340 $ 13,018 $ 13,899