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Cemetery Perpetual Care Trust Investments (Cost and fair market values associated with the trust investments held in perpetual care trust funds) (Details) - Perpetual Care Trust Investments - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
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Debt and Equity Securities, FV-NI [Line Items] |  |
Cemetery perpetual care investments | $ (44,071) | $ (50,229)
Market value as a percentage of cost | 90.80% | 105.00%
Cash and money market accounts | Fair Value, Level 1 |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Cost | $ 11,144 | $ 1,906
Unrealized Gains | 0 | 0
Unrealized Losses | 0 | 0
Fair Market Value | 11,144 | 1,906
Foreign debt | Fair Value, Level 2 |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Cost | 2,872 | 3,580
Unrealized Gains | 27 | 227
Unrealized Losses | (385) | (134)
Fair Market Value | 2,514 | 3,673
Corporate debt | Fair Value, Level 2 |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Cost | 9,956 | 12,557
Unrealized Gains | 227 | 805
Unrealized Losses | (730) | (187)
Fair Market Value | 9,453 | 13,175
Preferred stock | Fair Value, Level 2 |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Cost | 8,141 | 11,545
Unrealized Gains | 37 | 364
Unrealized Losses | (820) | (411)
Fair Market Value | 7,358 | 11,498
Mortgage-backed securities | Fair Value, Level 2 |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Cost | 417 | 621
Unrealized Gains | 101 | 152
Unrealized Losses | (9) | (15)
Fair Market Value | 509 | 758
Common stock | Fair Value, Level 1 |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Cost | 15,562 | 16,326
Unrealized Gains | 542 | 3,116
Unrealized Losses | (3,395) | (1,595)
Fair Market Value | 12,709 | 17,847
Fixed income | Fair Value, Level 2 |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Cost |  | 913
Unrealized Gains |  | 42
Unrealized Losses |  | (10)
Fair Market Value |  | 945
Trust securities |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Cost | 48,092 | 47,448
Unrealized Gains | 934 | 4,706
Unrealized Losses | (5,339) | (2,352)
Fair Market Value | 43,687 | 49,802
Accrued investment income |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Cost | 384 | 427
Fair Market Value | $ 384 | $ 427

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