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Preneed Trust Investments Preneed Trust Investments (Unrealized losses on preneed funeral trust investments) (Details) - Preneed Funeral Trust Investments - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
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Gain (Loss) on Investments [Line Items] |  |
Fair market value, In Loss Position Less than12 months | $ 14,075 | $ 17,076
Unrealized Losses, In Loss Position Less than12 months | (1,620) | (772)
Fair market value, In Loss Position Greater than12 months | 13,013 | 20,934
Unrealized Losses, In Loss Position Greater than12 months | (1,990) | (3,944)
Fair market value, Total | 27,088 | 38,010
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (3,610) | (4,716)
U.S. treasury debt |  |
Gain (Loss) on Investments [Line Items] |  |
Fair market value, In Loss Position Less than12 months | 1,325 | 834
Unrealized Losses, In Loss Position Less than12 months | (15) | (10)
Fair market value, In Loss Position Greater than12 months | 0 | 0
Unrealized Losses, In Loss Position Greater than12 months | 0 | 0
Fair market value, Total | 1,325 | 834
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (15) | (10)
Municipal bonds |  |
Gain (Loss) on Investments [Line Items] |  |
Fair market value, In Loss Position Less than12 months |  | 244
Unrealized Losses, In Loss Position Less than12 months |  | (5)
Fair market value, In Loss Position Greater than12 months |  | 0
Unrealized Losses, In Loss Position Greater than12 months |  | 0
Fair market value, Total |  | 244
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss |  | (5)
Foreign debt |  |
Gain (Loss) on Investments [Line Items] |  |
Fair market value, In Loss Position Less than12 months | 159 | 2,654
Unrealized Losses, In Loss Position Less than12 months | (6) | (186)
Fair market value, In Loss Position Greater than12 months | 1,608 | 2,905
Unrealized Losses, In Loss Position Greater than12 months | (183) | (490)
Fair market value, Total | 1,767 | 5,559
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (189) | (676)
Corporate debt |  |
Gain (Loss) on Investments [Line Items] |  |
Fair market value, In Loss Position Less than12 months | 3,770 | 6,977
Unrealized Losses, In Loss Position Less than12 months | (74) | (215)
Fair market value, In Loss Position Greater than12 months | 842 | 2,234
Unrealized Losses, In Loss Position Greater than12 months | (203) | (919)
Fair market value, Total | 4,612 | 9,211
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (277) | (1,134)
Preferred stock |  |
Gain (Loss) on Investments [Line Items] |  |
Fair market value, In Loss Position Less than12 months | 50 | 3,420
Unrealized Losses, In Loss Position Less than12 months | 0 | (128)
Fair market value, In Loss Position Greater than12 months | 8,184 | 11,750
Unrealized Losses, In Loss Position Greater than12 months | (585) | (842)
Fair market value, Total | 8,234 | 15,170
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (585) | (970)
Mortgage-backed securities |  |
Gain (Loss) on Investments [Line Items] |  |
Fair market value, In Loss Position Less than12 months | 221 | 55
Unrealized Losses, In Loss Position Less than12 months | (17) | (5)
Fair market value, In Loss Position Greater than12 months | 36 | 11
Unrealized Losses, In Loss Position Greater than12 months | (10) | (1)
Fair market value, Total | 257 | 66
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (27) | (6)
Equity |  |
Gain (Loss) on Investments [Line Items] |  |
Fair market value, In Loss Position Less than12 months |  | 2,795
Unrealized Losses, In Loss Position Less than12 months |  | (216)
Fair market value, In Loss Position Greater than12 months |  | 3,390
Unrealized Losses, In Loss Position Greater than12 months |  | (1,634)
Fair market value, Total |  | 6,185
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss |  | (1,850)
Common stock |  |
Gain (Loss) on Investments [Line Items] |  |
Fair market value, In Loss Position Less than12 months | 8,001 |
Unrealized Losses, In Loss Position Less than12 months | (1,496) |
Fair market value, In Loss Position Greater than12 months | 1,728 |
Unrealized Losses, In Loss Position Greater than12 months | (972) |
Fair market value, Total | 9,729 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (2,468) |
Fixed income |  |
Gain (Loss) on Investments [Line Items] |  |
Fair market value, In Loss Position Less than12 months | 549 | 97
Unrealized Losses, In Loss Position Less than12 months | (12) | (7)
Fair market value, In Loss Position Greater than12 months | 615 | 644
Unrealized Losses, In Loss Position Greater than12 months | (37) | (58)
Fair market value, Total | 1,164 | 741
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | $ (49) | $ (65)

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