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Cemetery Perpetual Care Trust Investments (Unrealized losses on perpetual care trust investments) (Details) - Perpetual Care Trust Invesments [Member] - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
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Gain (Loss) on Securities [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | $ 14,518 | $ 21,221
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (1,677) | (3,612)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 8,380 | 4,492
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (1,712) | (1,727)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 22,898 | 25,713
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (3,389) | (5,339)
Foreign Debt [Member] |  |
Gain (Loss) on Securities [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 1,571 | 1,619
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (33) | (189)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 838 | 639
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (149) | (196)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 2,409 | 2,258
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (182) | (385)
Corporate Debt Securities [Member] |  |
Gain (Loss) on Securities [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 903 | 7,006
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (58) | (587)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 3,590 | 301
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (270) | (143)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 4,493 | 7,307
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (328) | (730)
Common Stock [Member] |  |
Gain (Loss) on Securities [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 8,369 | 9,010
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (1,433) | (2,557)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 917 | 733
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (890) | (838)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 9,286 | 9,743
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (2,323) | (3,395)
Preferred Stock [Member] |  |
Gain (Loss) on Securities [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 3,251 | 3,586
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (152) | (279)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 2,959 | 2,787
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (390) | (541)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 6,210 | 6,373
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (542) | (820)
Mortgage Backed Securities [Member] |  |
Gain (Loss) on Securities [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 0 | 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 0 | 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 76 | 32
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (13) | (9)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 76 | 32
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (13) | $ (9)
Mutual Fund [Member] |  |
Gain (Loss) on Securities [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 424 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (1) |
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 0 |
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | 0 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 424 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | $ (1) |

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- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer. + References No definition available. + Details
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- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale in a continuous loss position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563 + Details
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