Cemetery Perpetual Care Trust Investments (Cost and fair market values associated with the trust investments held in perpetual care trust funds) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016
Schedule of Trading Securities and Other Trading Assets [Line Items]
Impairment charge for other-than-temporary declines in fair value	$ 2,300
Perpetual Care Trust Invesments
Schedule of Trading Securities and Other Trading Assets [Line Items]
Cemetery perpetual care investments	$ (50,229)	$ (46,889)
Market value as a percentage of cost	105.00%	99.30%
Impairment charge for other-than-temporary declines in fair value		$ 400
Perpetual Care Trust Invesments \| Cash and money market accounts \| Fair Value, Level 1
Schedule of Trading Securities and Other Trading Assets [Line Items]
Cost	$ 1,906	6,522
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Market Value	1,906	6,522
Perpetual Care Trust Invesments \| Municipal bonds \| Fair Value, Level 2
Schedule of Trading Securities and Other Trading Assets [Line Items]
Cost		365
Unrealized Gains		13
Unrealized Losses		(3)
Fair Market Value		375
Perpetual Care Trust Invesments \| Foreign debt \| Fair Value, Level 2
Schedule of Trading Securities and Other Trading Assets [Line Items]
Cost	3,580	5,100
Unrealized Gains	227	99
Unrealized Losses	(134)	(435)
Fair Market Value	3,673	4,764
Perpetual Care Trust Invesments \| Corporate debt \| Fair Value, Level 2
Schedule of Trading Securities and Other Trading Assets [Line Items]
Cost	12,557	13,715
Unrealized Gains	805	966
Unrealized Losses	(187)	(821)
Fair Market Value	13,175	13,860
Perpetual Care Trust Invesments \| Preferred stock \| Fair Value, Level 2
Schedule of Trading Securities and Other Trading Assets [Line Items]
Cost	11,545	11,323
Unrealized Gains	364	5
Unrealized Losses	(411)	(664)
Fair Market Value	11,498	10,664
Perpetual Care Trust Invesments \| Mortgage-backed securities \| Fair Value, Level 2
Schedule of Trading Securities and Other Trading Assets [Line Items]
Cost	621	569
Unrealized Gains	152	223
Unrealized Losses	(15)	(3)
Fair Market Value	758	789
Perpetual Care Trust Invesments \| Common stock \| Fair Value, Level 1
Schedule of Trading Securities and Other Trading Assets [Line Items]
Cost	16,326	8,259
Unrealized Gains	3,116	1,382
Unrealized Losses	(1,595)	(1,146)
Fair Market Value	17,847	8,495
Perpetual Care Trust Invesments \| Fixed income \| Fair Value, Level 2
Schedule of Trading Securities and Other Trading Assets [Line Items]
Cost	913	855
Unrealized Gains	42	76
Unrealized Losses	(10)	0
Fair Market Value	945	931
Perpetual Care Trust Invesments \| Trust securities
Schedule of Trading Securities and Other Trading Assets [Line Items]
Cost	47,448	46,708
Unrealized Gains	4,706	2,764
Unrealized Losses	(2,352)	(3,072)
Fair Market Value	49,802	46,400
Perpetual Care Trust Invesments \| Accrued investment income
Schedule of Trading Securities and Other Trading Assets [Line Items]
Cost	427	489
Fair Market Value	$ 427	$ 489

Fair market value as a percentage of cost.

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

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