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Preneed Trust Investments (Preneed cemetery trust investment security transactions) (Details) - USD ($) | 3 Months Ended
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Mar. 31, 2019 | Mar. 31, 2018
Debt and Equity Securities, FV-NI [Line Items] |  |
Fair value measurements, transfers between Level 1 and Level 2 | $ 0 |
Preneed Cemetery Trust Investments [Member] | Interest Income and Other, Net [Member] |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment income | 571,000 | $ 425,000
Realized gain, net | 1,458,000 | 853,000
Realized losses | (635,000) | (607,000)
Expenses and taxes | (278,000) | (51,000)
Increase (decrease) in deferred preneed cemetery receipts held in trust | $ (1,116,000) | $ (620,000)

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