Preneed Activities Schedule of Available-for-sale Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Gross Unrealized Losses	$ (96,934)
Available-for-sale Securities, Fair Value	4,545,527
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	840,484
Debt Securities, Available-for-sale, Amortized Cost	3,801,977
Estimate of Fair Value Measurement [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Gross Unrealized Losses		$ (88,603)
Available-for-sale Securities, Fair Value		4,168,375
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax		687,303
Debt Securities, Available-for-sale, Amortized Cost		3,569,675
Fair Value, Inputs, Level 2 [Member] | US Treasury Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Gross Unrealized Losses	(283)	(272)
Available-for-sale Securities, Fair Value	51,514	46,201
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	795	1,566
Debt Securities, Available-for-sale, Amortized Cost	51,002	44,907
Fair Value, Inputs, Level 2 [Member] | Debt Security, Government, Non-US [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Gross Unrealized Losses	0	(157)
Available-for-sale Securities, Fair Value	29,909	30,104
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	28	51
Debt Securities, Available-for-sale, Amortized Cost	29,881	30,210
Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Gross Unrealized Losses	(2)	(8)
Available-for-sale Securities, Fair Value	174	1,675
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	6	14
Debt Securities, Available-for-sale, Amortized Cost	170	1,669
Fair Value, Inputs, Level 2 [Member] | Residential Mortgage Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Gross Unrealized Losses	(15)	0
Available-for-sale Securities, Fair Value	1,450	2,569
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	58	131
Debt Securities, Available-for-sale, Amortized Cost	1,407	2,438
Fair Value, Inputs, Level 2 [Member] | Asset-backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Gross Unrealized Losses	(10)	(5)
Available-for-sale Securities, Fair Value	266	172
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	2	3
Debt Securities, Available-for-sale, Amortized Cost	274	174
Fair Value, Inputs, Level 2 [Member] | Preferred Stock securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Gross Unrealized Losses	(1,024)	(24)
Available-for-sale Securities, Fair Value	3,823	334
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	4	0
Debt Securities, Available-for-sale, Amortized Cost	4,843	358
Fair Value, Inputs, Level 1 [Member] | US Common Stock Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Gross Unrealized Losses	(56,092)	(54,748)
Available-for-sale Securities, Fair Value	2,217,042	1,949,134
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	624,349	503,757
Debt Securities, Available-for-sale, Amortized Cost	1,648,785	1,500,125
Fair Value, Inputs, Level 1 [Member] | Canada Common Stock Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Gross Unrealized Losses	(898)	(1,823)
Available-for-sale Securities, Fair Value	53,506	44,108
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	19,617	10,915
Debt Securities, Available-for-sale, Amortized Cost	34,787	35,016
Fair Value, Inputs, Level 1 [Member] | Other International Common Stock Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Gross Unrealized Losses	(9,819)	(1,831)
Available-for-sale Securities, Fair Value	161,838	148,781
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	42,171	39,837
Debt Securities, Available-for-sale, Amortized Cost	129,486	110,775
Fair Value, Inputs, Level 1 [Member] | Equity Funds [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Gross Unrealized Losses	(10,116)	(10,437)
Available-for-sale Securities, Fair Value	1,006,605	906,124
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	140,893	95,155
Debt Securities, Available-for-sale, Amortized Cost	875,828	821,406
Fair Value, Inputs, Level 1 [Member] | Fixed Income Funds [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Gross Unrealized Losses	(18,675)	(19,298)
Available-for-sale Securities, Fair Value	1,019,212	1,038,983
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	12,560	35,872
Debt Securities, Available-for-sale, Amortized Cost	1,025,327	1,022,409
Fair Value, Inputs, Level 3 [Member] | Other Investments [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Gross Unrealized Losses	0	0
Available-for-sale Securities, Fair Value	188	190
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	1	2
Debt Securities, Available-for-sale, Amortized Cost	187	188
Reported Value Measurement [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Gross Unrealized Losses	(8,638)
Available-for-sale Securities, Fair Value	1,991,324
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	405,261
Debt Securities, Available-for-sale, Amortized Cost	1,594,701
Reported Value Measurement [Member] | Commingled funds - Fixed inc [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Gross Unrealized Losses	(3,171)	(173)
Available-for-sale Securities, Fair Value	774,893	694,520
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	115,939	37,474
Debt Securities, Available-for-sale, Amortized Cost	662,125	657,219
Reported Value Measurement [Member] | Commingled funds - Equity [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Gross Unrealized Losses	(114)	0
Available-for-sale Securities, Fair Value	391,937	381,033
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	161,125	97,704
Debt Securities, Available-for-sale, Amortized Cost	230,926	283,329
Reported Value Measurement [Member] | Money Market Funds [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Gross Unrealized Losses	0	0
Available-for-sale Securities, Fair Value	408,762	330,745
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-sale, Amortized Cost	408,762	330,745
Reported Value Measurement [Member] | Private Equity Funds [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Gross Unrealized Losses	(5,353)	(10,284)
Available-for-sale Securities, Fair Value	415,732	276,515
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	128,197	68,846
Debt Securities, Available-for-sale, Amortized Cost	292,888	217,953
Reported Value Measurement [Member] | Reported At Net Asset Value [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Gross Unrealized Losses		(10,457)
Available-for-sale Securities, Fair Value		1,682,813
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax		204,024
Debt Securities, Available-for-sale, Amortized Cost		1,489,246
Estimate of Fair Value Measurement [Member]
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Gross Unrealized Losses	(105,572)	(99,060)
Available-for-sale Securities, Fair Value	6,536,851	5,851,188
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	1,245,745	891,327
Debt Securities, Available-for-sale, Amortized Cost	$ 5,396,678	$ 5,058,921