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Trust Investments (Preneed cemetery trust investment security transactions) (Details) - Preneed Cemetery Trust Investments [Member] - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Debt and Equity Securities, FV-NI [Line Items] |  |  |  |
Unrealized Gain (Loss) on Investments | $ (3,966) | $ 1,235 | $ 4,893 | $ (2,726)
Interest Income and Other, Net [Member] |  |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |  |
Investment income | 441 | 449 | 1,570 | 1,421
Realized gain, net | 2,207 | 2,857 | 16,315 | 6,392
Realized losses | (214) | (918) | (6,563) | (4,490)
Expenses and taxes | (546) | (357) | (1,308) | (982)
Increase (decrease) in deferred preneed cemetery receipts held in trust | $ 2,078 | $ (3,266) | $ (14,907) | $ 385

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