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Preneed Trust Investments (Unrealized losses on cemetery merchandise and service trust investments) (Details) - Preneed Cemetery Trust Investments [Member] - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
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Gain (Loss) on Investments [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | $ 28,917 | $ 12,806
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (2,049) | (1,616)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 7,843 | 12,361
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (2,443) | (1,933)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 36,760 | 25,167
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (4,492) | (3,549)
Available-for-sale Securities, Amortized Cost Basis | 71,397 | 71,306
Unrealized Gains | 4,554 | 7,535
Foreign Debt [Member] |  |
Gain (Loss) on Investments [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 1,635 | 151
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (33) | (6)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 1,015 | 1,637
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (105) | (187)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 2,650 | 1,788
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (138) | (193)
Corporate Debt [Member] |  |
Gain (Loss) on Investments [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 7,814 | 3,735
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (284) | (72)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 437 | 846
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (194) | (201)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 8,251 | 4,581
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (478) | (273)
Preferred Stock [Member] |  |
Gain (Loss) on Investments [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 5,362 | 48
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (134) | 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 3,996 | 8,109
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (356) | (588)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 9,358 | 8,157
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (490) | (588)
Mortgage Backed Securities [Member] |  |
Gain (Loss) on Investments [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 0 | 127
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 0 | (15)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 60 | 27
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (10) | (9)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 60 | 154
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (10) | (24)
Available-for-sale Securities, Amortized Cost Basis |  | 1,018
Unrealized Gains |  | 249
Common Stock [Member] |  |
Gain (Loss) on Investments [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 14,106 | 8,249
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (1,598) | (1,512)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 2,335 | 1,742
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (1,778) | (948)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 16,441 | 9,991
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (3,376) | (2,460)
Mutual Fund [Member] |  |
Gain (Loss) on Investments [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value |  | 496
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss |  | (11)
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 |  | 496
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss |  | (11)
Fair Value, Inputs, Level 1 [Member] | Common Stock [Member] |  |
Gain (Loss) on Investments [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 28,388 | 26,465
Unrealized Gains | 3,306 | 5,250
Fair Value, Inputs, Level 2 [Member] | Corporate Debt [Member] |  |
Gain (Loss) on Investments [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 16,756 | 18,238
Unrealized Gains | 672 | $ 1,184
Fair Value, Inputs, Level 2 [Member] | Mortgage Backed Securities [Member] |  |
Gain (Loss) on Investments [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 845 |
Unrealized Gains | $ 343 |

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