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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 | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cemetary perpetual care trust investments | $ 48,813 | $ 50,229
Fair market value as a percentage of cost | 99.80% | 105.00%
Trust Securities [Member] |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cost | $ 48,429 | $ 47,448
Unrealized Gains | 3,008 | 4,706
Unrealized Losses | (3,099) | (2,352)
Fair Market Value | 48,338 | 49,802
Accrued Investment Income [Member] |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cost | 475 | 427
Fair Market Value | 475 | 427
Fair Value, Inputs, Level 1 [Member] | Cash and Money Market Accounts [Member] |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cost | 5,227 | 1,906
Unrealized Gains | 0 | 0
Unrealized Losses | 0 | 0
Fair Market Value | 5,227 | 1,906
Fair Value, Inputs, Level 1 [Member] | Common Stock [Member] |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cost | 18,596 | 16,326
Unrealized Gains | 2,112 | 3,116
Unrealized Losses | (2,284) | (1,595)
Fair Market Value | 18,424 | 17,847
Fair Value, Inputs, Level 2 [Member] | Foreign Government Debt Securities [Member] |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cost | 3,474 | 3,580
Unrealized Gains | 128 | 227
Unrealized Losses | (101) | (134)
Fair Market Value | 3,501 | 3,673
Fair Value, Inputs, Level 2 [Member] | Corporate Debt [Member] |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cost | 12,298 | 12,557
Unrealized Gains | 487 | 805
Unrealized Losses | (348) | (187)
Fair Market Value | 12,437 | 13,175
Fair Value, Inputs, Level 2 [Member] | Preferred Stock [Member] |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cost | 8,273 | 11,545
Unrealized Gains | 53 | 364
Unrealized Losses | (359) | (411)
Fair Market Value | 7,967 | 11,498
Fair Value, Inputs, Level 2 [Member] | Mortgage Backed Securities [Member] |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cost | 561 | 621
Unrealized Gains | 228 | 152
Unrealized Losses | (7) | (15)
Fair Market Value | $ 782 | 758
Fair Value, Inputs, Level 2 [Member] | Fixed Income [Member] |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cost |  | 913
Unrealized Gains |  | 42
Unrealized Losses |  | (10)
Fair Market Value |  | $ 945

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