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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 | Jun. 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 | $ 26,695 | $ 12,806
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (2,454) | (1,616)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 9,623 | 12,361
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (2,659) | (1,933)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 36,318 | 25,167
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (5,113) | (3,549)
Available-for-sale Securities, Amortized Cost Basis | 71,141 | 71,306
Unrealized Gains | 5,829 | 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 | 1,821 | 151
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (99) | (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 | (148) | (187)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 2,836 | 1,788
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (247) | (193)
Corporate Debt [Member] |  |
Gain (Loss) on Investments [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 9,084 | 3,735
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (643) | (72)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 968 | 846
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (213) | (201)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 10,052 | 4,581
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (856) | (273)
Preferred Stock [Member] |  |
Gain (Loss) on Investments [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 5,395 | 48
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (162) | 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 4,687 | 8,109
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (410) | (588)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 10,082 | 8,157
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (572) | (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 | 68 | 27
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (14) | (9)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 68 | 154
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (14) | (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 | 9,570 | 8,249
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (1,491) | (1,512)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 2,885 | 1,742
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (1,874) | (948)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 12,455 | 9,991
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (3,365) | (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 | 825 | 496
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (59) | (11)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 0 | 0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | 0 | 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 825 | 496
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (59) | (11)
Fair Value, Inputs, Level 1 [Member] | Common Stock [Member] |  |
Gain (Loss) on Investments [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 28,100 | 26,465
Unrealized Gains | 4,741 | 5,250
Fair Value, Inputs, Level 2 [Member] | Corporate Debt [Member] |  |
Gain (Loss) on Investments [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 17,905 | 18,238
Unrealized Gains | 559 | $ 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 | 928 |
Unrealized Gains | $ 328 |

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