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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 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Debt and Equity Securities, FV-NI [Line Items]        
Purchases $ (5,117) $ (4,742) $ (14,274) $ (6,670)
Sales $ 6,278 $ 4,431 $ 7,980 $ 9,397