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Preneed Activities Schedule of Unrealized Loss on Investments (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
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Estimate of Fair Value Measurement [Member] |  |
Schedule of unrealized loss on investments [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | $ 51,191 | $ 55,264
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (1,226) | (797)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 16,452 | 11,154
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (914) | (603)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 67,643 | 66,418
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (2,140) | (1,400)
US Treasury Securities |  |
Schedule of unrealized loss on investments [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 27,045 | 29,014
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (402) | (115)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 2,045 | 106
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (27) | (2)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 29,090 | 29,120
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (429) | (117)
Foreign Government Debt Securities |  |
Schedule of unrealized loss on investments [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 16,545 | 20,947
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (684) | (639)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 9,999 | 6,370
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (695) | (450)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 26,544 | 27,317
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (1,379) | (1,089)
Corporate Debt Securities |  |
Schedule of unrealized loss on investments [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 4,728 | 2,423
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (80) | (31)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 4,165 | 4,453
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (180) | (139)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 8,893 | 6,876
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (260) | (170)
Residential Mortgage Backed Securities |  |
Schedule of unrealized loss on investments [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 2,868 | 2,880
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (59) | (12)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 150 | 151
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (2) | (2)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 3,018 | 3,031
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (61) | (14)
Asset-backed Securities |  |
Schedule of unrealized loss on investments [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 5 | 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (1) | 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 93 | 74
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (10) | (10)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 98 | 74
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | $ (11) | $ (10)

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- Definition For all investments in an unrealized loss position, including those for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), a tabular disclosure of the aggregate related fair value of investments with unrealized losses and the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value). + 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 that have been in a continuous loss position for twelve months or longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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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