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Cemetery Perpetual Care Trust Investments (Perpetual care trust investment security transactions recorded in Cemetery revenue) (Details) - Perpetual Care Trust Invesments [Member] - Cemetery Revenue [Member] - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |  |  |
Investment income | $ 1,158 | $ 1,539 | $ 3,749 | $ 4,831
Realized gain, net | (241) | (283) | (955) | (891)
Total | $ 917 | $ 1,256 | $ 2,794 | $ 3,940

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