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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, 2019	Dec. 31, 2018
Debt and Equity Securities, FV-NI [Line Items]
Cemetary perpetual care trust investments	$ 47,970	$ 44,071
Fair market value as a percentage of cost	97.40%	90.80%
Trust Securities [Member]
Debt and Equity Securities, FV-NI [Line Items]
Cost	$ 48,721	$ 48,092
Unrealized Gains	2,129	934
Unrealized Losses	(3,389)	(5,339)
Fair Market Value	47,461	43,687
Accrued Investment Income [Member]
Debt and Equity Securities, FV-NI [Line Items]
Cost	509	384
Fair Market Value	509	384
Fair Value, Inputs, Level 1 [Member] | Cash and Money Market Accounts [Member]
Debt and Equity Securities, FV-NI [Line Items]
Cost	3,696	11,144
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Market Value	3,696	11,144
Fair Value, Inputs, Level 1 [Member] | Common stock
Debt and Equity Securities, FV-NI [Line Items]
Cost	18,370	15,562
Unrealized Gains	1,351	542
Unrealized Losses	(2,323)	(3,395)
Fair Market Value	17,398	12,709
Fair Value, Inputs, Level 2 [Member] | Debt Security, Government, Non-US [Member]
Debt and Equity Securities, FV-NI [Line Items]
Cost	4,194	2,872
Unrealized Gains	114	27
Unrealized Losses	(182)	(385)
Fair Market Value	4,126	2,514
Fair Value, Inputs, Level 2 [Member] | Corporate Debt [Member]
Debt and Equity Securities, FV-NI [Line Items]
Cost	10,561	9,956
Unrealized Gains	393	227
Unrealized Losses	(328)	(730)
Fair Market Value	10,626	9,453
Fair Value, Inputs, Level 2 [Member] | Preferred Stock [Member]
Debt and Equity Securities, FV-NI [Line Items]
Cost	9,706	8,141
Unrealized Gains	197	37
Unrealized Losses	(542)	(820)
Fair Market Value	9,361	7,358
Fair Value, Inputs, Level 2 [Member] | Mortgage Backed Securities [Member]
Debt and Equity Securities, FV-NI [Line Items]
Cost	406	417
Unrealized Gains	57	101
Unrealized Losses	(13)	(9)
Fair Market Value	450	$ 509
Fair Value, Inputs, Level 2 [Member] | Fixed Income [Member]
Debt and Equity Securities, FV-NI [Line Items]
Cost	1,788
Unrealized Gains	17
Unrealized Losses	(1)
Fair Market Value	$ 1,804

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563

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