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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 | Mar. 31, 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 | $ 25,155 | $ 12,806
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (3,031) | (1,616)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 12,407 | 12,361
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (2,481) | (1,933)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 37,562 | 25,167
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (5,512) | (3,549)
Available-for-sale Securities, Amortized Cost Basis | 71,783 | 71,306
Unrealized Gains | 5,426 | 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 | 519 | 151
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (20) | (6)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 1,605 | 1,637
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (224) | (187)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 2,124 | 1,788
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (244) | (193)
Corporate Debt [Member] |  |
Gain (Loss) on Investments [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 6,987 | 3,735
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (464) | (72)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 768 | 846
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (201) | (201)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 7,755 | 4,581
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (665) | (273)
Preferred Stock [Member] |  |
Gain (Loss) on Investments [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 4,731 | 48
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (43) | 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 8,295 | 8,109
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (708) | (588)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 13,026 | 8,157
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (751) | (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 | 75 | 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 | 73 | 27
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (26) | (9)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 148 | 154
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (26) | (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 | 12,001 | 8,249
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (2,461) | (1,512)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 1,666 | 1,742
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (1,322) | (948)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 13,667 | 9,991
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (3,783) | (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 | 842 | 496
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (43) | (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 | 842 | 496
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (43) | (11)
Fair Value, Inputs, Level 1 [Member] | Common Stock [Member] |  |
Gain (Loss) on Investments [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 25,216 | 26,465
Unrealized Gains | 4,074 | 5,250
Fair Value, Inputs, Level 2 [Member] | Corporate Debt [Member] |  |
Gain (Loss) on Investments [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 15,665 | 18,238
Unrealized Gains | 733 | $ 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 | 1,015 |
Unrealized Gains | $ 281 |

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