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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 Invesments [Member] - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cemetary perpetual care trust investments | $ 48,285 | $ 50,229
Fair market value as a percentage of cost | 99.40% | 105.00%
Trust Securities [Member] |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cost | $ 48,020 | $ 47,448
Unrealized Gains | 3,332 | 4,706
Unrealized Losses | (3,603) | (2,352)
Fair Market Value | 47,749 | 49,802
Accrued Investment Income [Member] |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cost | 536 | 427
Fair Market Value | 536 | 427
Fair Value, Inputs, Level 1 [Member] | Cash and Money Market Accounts [Member] |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cost | 5,067 | 1,906
Unrealized Gains | 0 | 0
Unrealized Losses | 0 | 0
Fair Market Value | 5,067 | 1,906
Fair Value, Inputs, Level 1 [Member] | Common Stock [Member] |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cost | 15,449 | 16,326
Unrealized Gains | 2,414 | 3,116
Unrealized Losses | (2,430) | (1,595)
Fair Market Value | 15,433 | 17,847
Fair Value, Inputs, Level 2 [Member] | Foreign Government Debt Securities [Member] |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cost | 3,602 | 3,580
Unrealized Gains | 144 | 227
Unrealized Losses | (170) | (134)
Fair Market Value | 3,576 | 3,673
Fair Value, Inputs, Level 2 [Member] | Corporate Debt [Member] |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cost | 10,743 | 12,557
Unrealized Gains | 486 | 805
Unrealized Losses | (429) | (187)
Fair Market Value | 10,800 | 13,175
Fair Value, Inputs, Level 2 [Member] | Preferred Stock [Member] |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cost | 11,618 | 11,545
Unrealized Gains | 91 | 364
Unrealized Losses | (523) | (411)
Fair Market Value | 11,186 | 11,498
Fair Value, Inputs, Level 2 [Member] | Mortgage Backed Securities [Member] |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cost | 622 | 621
Unrealized Gains | 172 | 152
Unrealized Losses | (16) | (15)
Fair Market Value | 778 | 758
Fair Value, Inputs, Level 2 [Member] | Fixed Income [Member] |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cost | 919 | 913
Unrealized Gains | 25 | 42
Unrealized Losses | (35) | (10)
Fair Market Value | $ 909 | $ 945

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