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Cemetery Perpetual Care Trust Investments Cemetery Perpetual Care Trust Investments (Unrealized losses on perpetual care trust investments) (Details) - Perpetual Care Trust Investments - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
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Gain (Loss) on Securities [Line Items] |  |
Fair market value, In Loss Position Less than12 months | $ 21,221 | $ 8,370
Unrealized Losses, In Loss Position Less than12 months | (3,612) | (1,073)
Fair market value, In Loss Position Greater than12 months | 4,492 | 8,299
Unrealized Losses, In Loss Position Greater than12 months | (1,727) | (1,279)
Fair market value, Total | 25,713 | 16,669
Unrealized Losses, Total | (5,339) | (2,352)
Foreign debt |  |
Gain (Loss) on Securities [Line Items] |  |
Fair market value, In Loss Position Less than12 months | 1,619 | 92
Unrealized Losses, In Loss Position Less than12 months | (189) | (3)
Fair market value, In Loss Position Greater than12 months | 639 | 1,128
Unrealized Losses, In Loss Position Greater than12 months | (196) | (131)
Fair market value, Total | 2,258 | 1,220
Unrealized Losses, Total | (385) | (134)
Corporate debt |  |
Gain (Loss) on Securities [Line Items] |  |
Fair market value, In Loss Position Less than12 months | 7,006 | 2,621
Unrealized Losses, In Loss Position Less than12 months | (587) | (59)
Fair market value, In Loss Position Greater than12 months | 301 | 555
Unrealized Losses, In Loss Position Greater than12 months | (143) | (128)
Fair market value, Total | 7,307 | 3,176
Unrealized Losses, Total | (730) | (187)
Preferred stock |  |
Gain (Loss) on Securities [Line Items] |  |
Fair market value, In Loss Position Less than12 months |  | 29
Unrealized Losses, In Loss Position Less than12 months |  | 0
Fair market value, In Loss Position Greater than12 months |  | 5,492
Unrealized Losses, In Loss Position Greater than12 months |  | (411)
Fair market value, Total |  | 5,521
Unrealized Losses, Total |  | (411)
Preferred stock |  |
Gain (Loss) on Securities [Line Items] |  |
Fair market value, In Loss Position Less than12 months | 3,586 |
Unrealized Losses, In Loss Position Less than12 months | (279) |
Fair market value, In Loss Position Greater than12 months | 2,787 |
Unrealized Losses, In Loss Position Greater than12 months | (541) |
Fair market value, Total | 6,373 |
Unrealized Losses, Total | (820) |
Mortgage-backed securities |  |
Gain (Loss) on Securities [Line Items] |  |
Fair market value, In Loss Position Less than12 months | 0 | 76
Unrealized Losses, In Loss Position Less than12 months | 0 | (10)
Fair market value, In Loss Position Greater than12 months | 32 | 16
Unrealized Losses, In Loss Position Greater than12 months | (9) | (5)
Fair market value, Total | 32 | 92
Unrealized Losses, Total | (9) | (15)
Common stock |  |
Gain (Loss) on Securities [Line Items] |  |
Fair market value, In Loss Position Less than12 months | 9,010 | 5,119
Unrealized Losses, In Loss Position Less than12 months | (2,557) | (991)
Fair market value, In Loss Position Greater than12 months | 733 | 1,108
Unrealized Losses, In Loss Position Greater than12 months | (838) | (604)
Fair market value, Total | 9,743 | 6,227
Unrealized Losses, Total | $ (3,395) | (1,595)
Mutual Fund [Member] |  |
Gain (Loss) on Securities [Line Items] |  |
Fair market value, In Loss Position Less than12 months |  | 433
Unrealized Losses, In Loss Position Less than12 months |  | (10)
Fair market value, In Loss Position Greater than12 months |  | 0
Unrealized Losses, In Loss Position Greater than12 months |  | 0
Fair market value, Total |  | 433
Unrealized Losses, Total |  | $ (10)

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