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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 Investments - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Debt and Equity Securities, FV-NI [Line Items]
Cemetery perpetual care investments	$ (44,071)	$ (50,229)
Market value as a percentage of cost	90.80%	105.00%
Cash and money market accounts | Fair Value, Level 1
Debt and Equity Securities, FV-NI [Line Items]
Cost	$ 11,144	$ 1,906
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Market Value	11,144	1,906
Foreign debt | Fair Value, Level 2
Debt and Equity Securities, FV-NI [Line Items]
Cost	2,872	3,580
Unrealized Gains	27	227
Unrealized Losses	(385)	(134)
Fair Market Value	2,514	3,673
Corporate debt | Fair Value, Level 2
Debt and Equity Securities, FV-NI [Line Items]
Cost	9,956	12,557
Unrealized Gains	227	805
Unrealized Losses	(730)	(187)
Fair Market Value	9,453	13,175
Preferred stock | Fair Value, Level 2
Debt and Equity Securities, FV-NI [Line Items]
Cost	8,141	11,545
Unrealized Gains	37	364
Unrealized Losses	(820)	(411)
Fair Market Value	7,358	11,498
Mortgage-backed securities | Fair Value, Level 2
Debt and Equity Securities, FV-NI [Line Items]
Cost	417	621
Unrealized Gains	101	152
Unrealized Losses	(9)	(15)
Fair Market Value	509	758
Common stock | Fair Value, Level 1
Debt and Equity Securities, FV-NI [Line Items]
Cost	15,562	16,326
Unrealized Gains	542	3,116
Unrealized Losses	(3,395)	(1,595)
Fair Market Value	12,709	17,847
Fixed income | Fair Value, Level 2
Debt and Equity Securities, FV-NI [Line Items]
Cost		913
Unrealized Gains		42
Unrealized Losses		(10)
Fair Market Value		945
Trust securities
Debt and Equity Securities, FV-NI [Line Items]
Cost	48,092	47,448
Unrealized Gains	934	4,706
Unrealized Losses	(5,339)	(2,352)
Fair Market Value	43,687	49,802
Accrued investment income
Debt and Equity Securities, FV-NI [Line Items]
Cost	384	427
Fair Market Value	$ 384	$ 427

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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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