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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 | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016 | Dec. 31, 2016
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |  |  |
Cemetary perpetual care trust investments |  | $ 48,679 |  | $ 46,889
Fair market value as a percentage of cost |  | 101.10% |  | 99.30%
Impairment charge, other than temporary decline in fair value of investments | $ 100 | $ 0 | $ 500 |
Trust Securities [Member] |  |  |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |  |  |
Cost |  | 47,632 |  | $ 46,708
Unrealized Gains |  | 3,435 |  | 2,764
Unrealized Losses |  | (2,888) |  | (3,072)
Fair Market Value |  | 48,179 |  | 46,400
Accrued Investment Income [Member] |  |  |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |  |  |
Cost |  | 500 |  | 489
Fair Market Value |  | 500 |  | 489
Fair Value, Inputs, Level 1 [Member] | Cash and Money Market Accounts [Member] |  |  |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |  |  |
Cost |  | 2,573 |  | 6,522
Unrealized Gains |  | 0 |  | 0
Unrealized Losses |  | 0 |  | 0
Fair Market Value |  | 2,573 |  | 6,522
Fair Value, Inputs, Level 1 [Member] | Common Stock [Member] |  |  |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |  |  |
Cost |  | 15,263 |  | 8,259
Unrealized Gains |  | 1,985 |  | 1,382
Unrealized Losses |  | (2,021) |  | (1,146)
Fair Market Value |  | 15,227 |  | 8,495
Fair Value, Inputs, Level 2 [Member] | Municipal Bonds [Member] |  |  |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |  |  |
Cost |  |  |  | 365
Unrealized Gains |  |  |  | 13
Unrealized Losses |  |  |  | (3)
Fair Market Value |  |  |  | 375
Fair Value, Inputs, Level 2 [Member] | Foreign Government Debt Securities [Member] |  |  |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |  |  |
Cost |  | 3,568 |  | 5,100
Unrealized Gains |  | 211 |  | 99
Unrealized Losses |  | (117) |  | (435)
Fair Market Value |  | 3,662 |  | 4,764
Fair Value, Inputs, Level 2 [Member] | Corporate Debt [Member] |  |  |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |  |  |
Cost |  | 13,194 |  | 13,715
Unrealized Gains |  | 768 |  | 966
Unrealized Losses |  | (368) |  | (821)
Fair Market Value |  | 13,594 |  | 13,860
Fair Value, Inputs, Level 2 [Member] | Preferred Stock [Member] |  |  |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |  |  |
Cost |  | 11,464 |  | 11,323
Unrealized Gains |  | 260 |  | 5
Unrealized Losses |  | (368) |  | (664)
Fair Market Value |  | 11,356 |  | 10,664
Fair Value, Inputs, Level 2 [Member] | Mortgage Backed Securities [Member] |  |  |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |  |  |
Cost |  | 661 |  | 569
Unrealized Gains |  | 147 |  | 223
Unrealized Losses |  | (14) |  | (3)
Fair Market Value |  | 794 |  | 789
Fair Value, Inputs, Level 2 [Member] | Fixed Income [Member] |  |  |  |
Schedule of Trading Securities and Other Trading Assets [Line Items] |  |  |  |
Cost |  | 909 |  | 855
Unrealized Gains |  | 64 |  | 76
Unrealized Losses |  | 0 |  | 0
Fair Market Value |  | $ 973 |  | $ 931

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