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Cemetery Perpetual Care Trust Investments (Perpetual care trust investment security transactions recorded in interest income and other, net) (Details) - Perpetual Care Trust Invesments [Member] - Interest Income and Other, Net [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] |  |  |  |
Realized gains | $ 670 | $ 22 | $ 1,024 | $ 304
Realized losses | (270) | (312) | (441) | (526)
Net change in care trusts’ corpus | $ (400) | $ 290 | $ (583) | $ 222

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