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Cemetery Perpetual Care Trust Investments (Purchases and sales of investments in perpetual care trusts) (Details) - Perpetual Care Trust Invesments [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 $ (7,680) $ (5,185) $ (21,954) $ (11,856)
Sales $ 6,599 $ 6,149 $ 14,578 $ 15,545