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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, 2021 | Dec. 31, 2020
--- | --- | ---
Gain (Loss) on Securities [Line Items] |  |
In Loss Position Less than 12 months | $ 5,067 | $ 4,010
In Loss Position Less than 12 months | (473) | (274)
In Loss Position Greater than 12 months | 4,741 | 5,074
In Loss Position Greater than 12 months | (768) | (1,281)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 9,808 | 9,084
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (1,241) | (1,555)
Available-for-sale Securities, Amortized Cost Basis | 94,304 | 82,573
Unrealized Gains | 10,228 | 13,856
Foreign debt |  |
Gain (Loss) on Securities [Line Items] |  |
In Loss Position Less than 12 months | 4,280 | 2,517
In Loss Position Less than 12 months | (427) | (57)
In Loss Position Greater than 12 months | 682 | 371
In Loss Position Greater than 12 months | (374) | (645)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 4,962 | 2,888
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (801) | (702)
Corporate Debt [Member] |  |
Gain (Loss) on Securities [Line Items] |  |
In Loss Position Less than 12 months | 746 | 784
In Loss Position Less than 12 months | (18) | (99)
In Loss Position Greater than 12 months | 0 | 542
In Loss Position Greater than 12 months | 0 | (259)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 746 | 1,326
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (18) | (358)
Preferred stock |  |
Gain (Loss) on Securities [Line Items] |  |
In Loss Position Less than 12 months | 41 | 709
In Loss Position Less than 12 months | (28) | (118)
In Loss Position Greater than 12 months | 4,059 | 4,049
In Loss Position Greater than 12 months | (394) | (218)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 4,100 | 4,758
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | (422) | (336)
Mortgage-backed securities |  |
Gain (Loss) on Securities [Line Items] |  |
In Loss Position Less than 12 months |  | 0
In Loss Position Less than 12 months |  | 0
In Loss Position Greater than 12 months |  | 112
In Loss Position Greater than 12 months |  | (159)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value |  | 112
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss |  | (159)
Available-for-sale Securities, Amortized Cost Basis |  | 272
Unrealized Gains |  | 0
Fair Value, Inputs, Level 1 [Member] | Common stock |  |
Gain (Loss) on Securities [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 39,372 | 30,253
Unrealized Gains | 4,411 | 7,642
Fair Value, Inputs, Level 2 [Member] | Corporate Debt [Member] |  |
Gain (Loss) on Securities [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 12,101 | 14,856
Unrealized Gains | $ 1,484 | $ 1,820

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