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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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