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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 | Sep. 30, 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 | $ 14,235 | $ 21,221
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (2,235) | (3,612)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 7,816 | 4,492
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (1,481) | (1,727)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 22,051 | 25,713
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (3,716) | (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 | 1,368 | 1,619
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (88) | (189)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 734 | 639
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (248) | (196)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 2,102 | 2,258
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (336) | (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 | 1,971 | 7,006
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (342) | (587)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 3,425 | 301
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (158) | (143)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 5,396 | 7,307
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (500) | (730)
Common Stock [Member] |  |
Gain (Loss) on Securities [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 7,753 | 9,010
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (1,703) | (2,557)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 1,885 | 733
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (874) | (838)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 9,638 | 9,743
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (2,577) | (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 | 2,542 | 3,586
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (25) | (279)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 1,549 | 2,787
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (69) | (541)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 4,091 | 6,373
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (94) | (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 | 223 | 32
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (132) | (9)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 223 | 32
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (132) | $ (9)
Mutual Fund [Member] |  |
Gain (Loss) on Securities [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 601 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (77) |
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 | 601 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | $ (77) |

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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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