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Preneed Trust Investments (Preneed funeral trust investment security transactions) (Details) - Preneed Funeral Trust Investments [Member] - Interest Income and Other, Net [Member] - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Investment income | $ 412 | $ 591
Realized gain, net | 2,896 | 824
Realized losses | (609) | (379)
Expenses and taxes | (144) | (339)
Decrease in deferred preneed funeral receipts held in trust | $ (2,555) | $ (697)

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