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Preneed Trust Investments (Cost and fair market values associated with preneed cemetery trust investments) (Details) - Preneed Cemetery Trust Investments - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Preneed cemetery trust investments | $ 75,992 | $ 71,834
Market value as a percentage of cost | 105.60% | 99.80%
Foreign Debt |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cost |  | $ 7,574
Unrealized Gains |  | 160
Unrealized Losses |  | (656)
Fair Market Value |  | 7,078
Corporate debt |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cost |  | 20,621
Unrealized Gains |  | 1,569
Unrealized Losses |  | (1,123)
Fair Market Value |  | 21,067
Preferred stock |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cost |  | 16,287
Unrealized Gains |  | 8
Unrealized Losses |  | (947)
Fair Market Value |  | 15,348
Mortgage-backed securities |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cost |  | 949
Unrealized Gains |  | 372
Unrealized Losses |  | (4)
Fair Market Value |  | 1,317
Trust securities |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cost | $ 71,306 | 71,252
Unrealized Gains | 7,535 | 4,425
Unrealized Losses | (3,549) | (4,572)
Fair Market Value | 75,292 | 71,105
Accrued investment income |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cost | 700 | 729
Fair Market Value | 700 | 729
Fair Value, Level 1 | Cash and money market accounts |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cost | 3,132 | 10,852
Unrealized Gains | 0 | 0
Unrealized Losses | 0 | 0
Fair Market Value | 3,132 | 10,852
Fair Value, Level 1 | Common stock |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cost | 26,465 | 13,250
Unrealized Gains | 5,250 | 2,191
Unrealized Losses | (2,460) | (1,838)
Fair Market Value | 29,255 | 13,603
Fair Value, Level 2 | Municipal bonds |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cost |  | 496
Unrealized Gains |  | 18
Unrealized Losses |  | (4)
Fair Market Value |  | 510
Fair Value, Level 2 | Foreign Debt |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cost | 4,834 |
Unrealized Gains | 292 |
Unrealized Losses | (193) |
Fair Market Value | 4,933 |
Fair Value, Level 2 | Corporate debt |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cost | 18,238 |
Unrealized Gains | 1,184 |
Unrealized Losses | (273) |
Fair Market Value | 19,149 |
Fair Value, Level 2 | Preferred stock |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cost | 16,421 |
Unrealized Gains | 510 |
Unrealized Losses | (588) |
Fair Market Value | 16,343 |
Fair Value, Level 2 | Mortgage-backed securities |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cost | 1,018 |
Unrealized Gains | 249 |
Unrealized Losses | (24) |
Fair Market Value | 1,243 |
Fair Value, Level 2 | Fixed income |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |
Cost | 1,198 | 1,223
Unrealized Gains | 50 | 107
Unrealized Losses | (11) | 0
Fair Market Value | $ 1,237 | $ 1,330

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