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Trust Investments (Unrealized losses on cemetery merchandise and service trust investments) (Details) - Preneed Cemetery Trust Investments [Member] - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
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Gain (Loss) on Securities [Line Items] |  |
In Loss Position Less than 12 months | $ 12,143 | $ 5,771
In Loss Position Less than 12 months | (1,350) | (374)
In Loss Position Greater than 12 months | 2,082 | 5,680
In Loss Position Greater than 12 months | (1,741) | (796)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 14,225 | 11,451
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (3,091) | (1,170)
Available-for-sale Securities, Amortized Cost Basis | 79,600 | 73,009
Unrealized Gains | 8,316 | 5,098
Foreign debt |  |
Gain (Loss) on Securities [Line Items] |  |
In Loss Position Less than 12 months | 3,048 | 268
In Loss Position Less than 12 months | (309) | (42)
In Loss Position Greater than 12 months | 144 | 758
In Loss Position Greater than 12 months | (853) | (201)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 3,192 | 1,026
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (1,162) | (243)
Corporate Debt [Member] |  |
Gain (Loss) on Securities [Line Items] |  |
In Loss Position Less than 12 months | 4,073 | 1,368
In Loss Position Less than 12 months | (330) | (168)
In Loss Position Greater than 12 months | 1,363 | 4,520
In Loss Position Greater than 12 months | (483) | (481)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 5,436 | 5,888
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (813) | (649)
Preferred stock |  |
Gain (Loss) on Securities [Line Items] |  |
In Loss Position Less than 12 months | 5,022 | 4,135
In Loss Position Less than 12 months | (711) | (164)
In Loss Position Greater than 12 months | 441 | 0
In Loss Position Greater than 12 months | (216) | 0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 5,463 | 4,135
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (927) | (164)
Mortgage-backed securities |  |
Gain (Loss) on Securities [Line Items] |  |
In Loss Position Less than 12 months | 0 | 0
In Loss Position Less than 12 months | 0 | 0
In Loss Position Greater than 12 months | 134 | 402
In Loss Position Greater than 12 months | (189) | (114)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 134 | 402
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (189) | (114)
Available-for-sale Securities, Amortized Cost Basis |  | 517
Unrealized Gains |  | 0
Fair Value, Inputs, Level 1 [Member] | Common stock |  |
Gain (Loss) on Securities [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 26,137 | 28,569
Unrealized Gains | 4,729 | 2,766
Fair Value, Inputs, Level 2 [Member] | Corporate Debt [Member] |  |
Gain (Loss) on Securities [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 16,594 | 16,916
Unrealized Gains | 1,188 | $ 1,044
Fair Value, Inputs, Level 2 [Member] | Mortgage-backed securities |  |
Gain (Loss) on Securities [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 323 |
Unrealized Gains | $ 0 |

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