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Trust Investments (Cost and fair market values associated with the trust investments held in perpetual care trust) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Perpetual Care Trust Investments
Gain (Loss) on Securities [Line Items]
Available-for-sale securities, current	$ 70,828	$ 64,047
Market value as a percentage of cost	106.60%	104.90%
Perpetual Care Trust Investments | Accrued Investment Income [Member]
Gain (Loss) on Securities [Line Items]
Cost	$ 808	$ 512
Fair Market Value	808	512
Perpetual Care Trust Investments | Trust Securities [Member]
Gain (Loss) on Securities [Line Items]
Cost	65,665	60,571
Unrealized Gains	11,128	5,869
Unrealized Losses	(6,773)	(2,905)
Fair Market Value	70,020	63,535
Preneed Cemetery Trust Investments
Gain (Loss) on Securities [Line Items]
Preneed cemetery trust investments	89,081	74,572
Available-for-sale securities, current	$ 86,604	$ 72,382
Market value as a percentage of cost	106.70%	101.10%
Preneed Cemetery Trust Investments | Foreign Debt
Gain (Loss) on Securities [Line Items]
Cost		$ 5,609
Unrealized Gains		312
Unrealized Losses		(243)
Fair Market Value		5,678
Preneed Cemetery Trust Investments | Corporate debt
Gain (Loss) on Securities [Line Items]
Cost		16,916
Unrealized Gains		1,044
Unrealized Losses		(649)
Fair Market Value		17,311
Preneed Cemetery Trust Investments | Preferred Stock [Member]
Gain (Loss) on Securities [Line Items]
Cost		14,206
Unrealized Gains		904
Unrealized Losses		(164)
Fair Market Value		14,946
Preneed Cemetery Trust Investments | Mortgage-backed securities
Gain (Loss) on Securities [Line Items]
Cost		517
Unrealized Gains		0
Unrealized Losses		(114)
Fair Market Value		403
Preneed Cemetery Trust Investments | Accrued Investment Income [Member]
Gain (Loss) on Securities [Line Items]
Cost	$ 993	737
Fair Market Value	993	737
Preneed Cemetery Trust Investments | Trust Securities [Member]
Gain (Loss) on Securities [Line Items]
Cost	82,573	73,009
Unrealized Gains	13,856	5,098
Unrealized Losses	(8,341)	(4,272)
Fair Market Value	88,088	73,835
Fair Value, Level 1 | Perpetual Care Trust Investments | Cash and Cash Equivalents
Gain (Loss) on Securities [Line Items]
Cost	686	4,624
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Market Value	686	4,624
Fair Value, Level 1 | Perpetual Care Trust Investments | Common Stock [Member]
Gain (Loss) on Securities [Line Items]
Cost	23,662	21,594
Unrealized Gains	6,108	3,399
Unrealized Losses	(5,255)	(1,911)
Fair Market Value	24,515	23,082
Fair Value, Level 1 | Preneed Cemetery Trust Investments | Cash and Cash Equivalents
Gain (Loss) on Securities [Line Items]
Cost	1,859	5,729
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Market Value	1,859	5,729
Fair Value, Level 1 | Preneed Cemetery Trust Investments | Common Stock [Member]
Gain (Loss) on Securities [Line Items]
Cost	30,253	28,569
Unrealized Gains	7,642	2,766
Unrealized Losses	(6,601)	(3,017)
Fair Market Value	31,294	28,318
Fair Value, Level 2 | Perpetual Care Trust Investments | Foreign Debt
Gain (Loss) on Securities [Line Items]
Cost	12,539	4,200
Unrealized Gains	1,641	238
Unrealized Losses	(582)	(175)
Fair Market Value	13,598	4,263
Fair Value, Level 2 | Perpetual Care Trust Investments | Corporate debt
Gain (Loss) on Securities [Line Items]
Cost	11,684	11,658
Unrealized Gains	1,506	802
Unrealized Losses	(240)	(534)
Fair Market Value	12,950	11,926
Fair Value, Level 2 | Perpetual Care Trust Investments | Preferred Stock [Member]
Gain (Loss) on Securities [Line Items]
Cost	10,444	10,782
Unrealized Gains	819	666
Unrealized Losses	(355)	(106)
Fair Market Value	10,908	11,342
Fair Value, Level 2 | Perpetual Care Trust Investments | Mortgage-backed securities
Gain (Loss) on Securities [Line Items]
Cost	206	324
Unrealized Gains	0	0
Unrealized Losses	(121)	(71)
Fair Market Value	85	253
Fair Value, Level 2 | Perpetual Care Trust Investments | Fixed income
Gain (Loss) on Securities [Line Items]
Cost	6,444	7,156
Unrealized Gains	1,054	618
Unrealized Losses	(220)	(107)
Fair Market Value	7,278	7,667
Fair Value, Level 2 | Preneed Cemetery Trust Investments | Foreign Debt
Gain (Loss) on Securities [Line Items]
Cost	15,953
Unrealized Gains	2,083
Unrealized Losses	(702)
Fair Market Value	17,334
Fair Value, Level 2 | Preneed Cemetery Trust Investments | Corporate debt
Gain (Loss) on Securities [Line Items]
Cost	14,856
Unrealized Gains	1,820
Unrealized Losses	(358)
Fair Market Value	16,318
Fair Value, Level 2 | Preneed Cemetery Trust Investments | Preferred Stock [Member]
Gain (Loss) on Securities [Line Items]
Cost	11,886
Unrealized Gains	980
Unrealized Losses	(336)
Fair Market Value	12,530
Fair Value, Level 2 | Preneed Cemetery Trust Investments | Mortgage-backed securities
Gain (Loss) on Securities [Line Items]
Cost	272
Unrealized Gains	0
Unrealized Losses	(159)
Fair Market Value	113
Fair Value, Level 2 | Preneed Cemetery Trust Investments | Fixed income
Gain (Loss) on Securities [Line Items]
Cost	7,494	1,463
Unrealized Gains	1,331	72
Unrealized Losses	(185)	(85)
Fair Market Value	$ 8,640	$ 1,450

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