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Trust Investments (Preneed cemetery trust investment security transactions) (Details) - Preneed Cemetery Trust Investments [Member] - Interest Income and Other, Net [Member] - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment income | $ 319 | $ 571
Realized gain, net | 1,916 | 1,458
Realized losses | (1,372) | (635)
Expenses and taxes | (187) | (278)
Increase (decrease) in deferred preneed cemetery receipts held in trust | $ (676) | $ (1,116)

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