Cemetery Perpetual Care Trusts Schedule of Unrealized Loss on Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Cemetery Perpetual Care [Member]
Schedule of unrealized loss on investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 591,618	$ 660,175
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	(16,270)	(28,203)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	411,564	350,308
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	(34,277)	(60,380)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	1,003,182	1,010,483
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	(50,547)	(88,583)
US Treasury Securities [Member] | Cemetery Perpetual Care [Member]
Schedule of unrealized loss on investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value		364
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses		(6)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value		35
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses		(1)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		399
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses		(7)
Foreign Government Debt Securities [Member] | Cemetery Perpetual Care [Member]
Schedule of unrealized loss on investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	66	1,569
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	(1)	(60)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	1,961	1,371
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	(113)	(102)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	2,027	2,940
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	(114)	(162)
Corporate Debt Securities [Member] | Cemetery Perpetual Care [Member]
Schedule of unrealized loss on investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	397	4,693
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	(7)	(134)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	1,866	4,147
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	(94)	(150)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	2,263	8,840
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	(101)	(284)
Residential Mortgage Backed Securities [Member] | Cemetery Perpetual Care [Member]
Schedule of unrealized loss on investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	303	303
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	(1)	(3)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	0	117
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	0	(6)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	303	420
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	(1)	(9)
Asset-backed Securities [Member] | Cemetery Perpetual Care [Member]
Schedule of unrealized loss on investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	28	146
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	(22)	(12)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	101	360
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	(6)	(19)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	129	506
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	(28)	(31)
Preferred Stock securities [Member] | Cemetery Perpetual Care [Member]
Schedule of unrealized loss on investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	846	4,029
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	(36)	(159)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	417	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	(81)	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	1,263	4,029
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	(117)	(159)
US Common Stock Securities [Member]
Schedule of unrealized loss on investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value		198,755
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses		(26,038)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value		21,355
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses		(5,999)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		220,110
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses		(32,037)
US Common Stock Securities [Member] | Cemetery Perpetual Care [Member]
Schedule of unrealized loss on investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	34,844	81,564
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	(1,339)	(7,793)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	12,974	14,900
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	(998)	(3,105)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	47,818	96,464
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	(2,337)	(10,898)
Canada Common Stock Securities [Member]
Schedule of unrealized loss on investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value		473
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses		(6)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value		1,430
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses		(885)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		1,903
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses		(891)
Canada Common Stock Securities [Member] | Cemetery Perpetual Care [Member]
Schedule of unrealized loss on investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	78	622
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	(47)	(31)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	558	1,026
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	(61)	(575)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	636	1,648
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	(108)	(606)
Other International Common Stock Securities [Member]
Schedule of unrealized loss on investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value		15,560
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses		(2,507)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value		9,412
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses		(3,292)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		24,972
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses		(5,799)
Other International Common Stock Securities [Member] | Cemetery Perpetual Care [Member]
Schedule of unrealized loss on investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	4,177	8,735
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	(508)	(941)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	5,715	2,347
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	(1,728)	(1,449)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	9,892	11,082
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	(2,236)	(2,390)
Equity Funds [Member]
Schedule of unrealized loss on investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value		207,253
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses		(25,991)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value		86,720
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses		(23,651)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		293,973
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses		(49,642)
Equity Funds [Member] | Cemetery Perpetual Care [Member]
Schedule of unrealized loss on investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	877	4,580
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	(17)	(606)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	2,899	1,258
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	(395)	(1,244)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	3,776	5,838
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	(412)	(1,850)
Fixed Income Funds [Member]
Schedule of unrealized loss on investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value		139,684
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses		(6,323)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value		44,550
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses		(12,204)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		184,234
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses		(18,527)
Fixed Income Funds [Member] | Cemetery Perpetual Care [Member]
Schedule of unrealized loss on investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	263,231	519,993
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	(4,678)	(18,205)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	348,623	294,309
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	(24,319)	(45,708)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	611,854	814,302
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	(28,997)	(63,913)
Private Equity Funds [Member]
Schedule of unrealized loss on investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses		0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value		9,526
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses		(4,502)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		9,526
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses		(4,502)
Private Equity Funds [Member] | Cemetery Perpetual Care [Member]
Schedule of unrealized loss on investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	21,426	13,139
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	(268)	(75)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	33,519	30,438
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	(6,442)	(8,021)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	54,945	43,577
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	(6,710)	(8,096)
Other Investments [Member] | Cemetery Perpetual Care [Member]
Schedule of unrealized loss on investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value		33,577
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses		253
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value		30,438
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses		8,021
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		64,015
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses		8,274
Fixed Income Commingled funds [Member] | Cemetery Perpetual Care [Member]
Schedule of unrealized loss on investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	265,345	20,438
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	9,346	178
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	2,931	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	40	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	268,276	20,438
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	9,386	178
Estimate of Fair Value Measurement [Member] | Cemetery Perpetual Care [Member]
Schedule of unrealized loss on investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	304,847	626,598
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	6,656	27,950
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	375,114	319,870
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	27,795	52,359
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	679,961	946,468
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	34,451	$ 80,309
Reported At Net Asset Value [Member] | Cemetery Perpetual Care [Member]
Schedule of unrealized loss on investments [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	286,771
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	9,614
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	36,450
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	6,482
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	323,221
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	$ 16,096