Preneed Activities Schedule of Available-for-sale Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-Sale and Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	$ 3,966,026
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Gain	651,813
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Loss	(233,462)
Debt Securities, Available-for-Sale and Held-to-Maturity, Fair Value	4,384,377
Estimate of Fair Value Measurement [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-Sale and Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss		$ 3,801,977
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Gain		840,484
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Loss		(96,934)
Debt Securities, Available-for-Sale and Held-to-Maturity, Fair Value		4,545,527
Fair Value, Inputs, Level 2 [Member] | US Treasury Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-Sale and Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	51,565	51,002
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Gain	299	795
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Loss	(1,043)	(283)
Debt Securities, Available-for-Sale and Held-to-Maturity, Fair Value	50,821	51,514
Fair Value, Inputs, Level 2 [Member] | Debt Security, Government, Non-US [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-Sale and Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	30,012	29,881
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Gain	22	28
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Loss	(1)	0
Debt Securities, Available-for-Sale and Held-to-Maturity, Fair Value	30,033	29,909
Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-Sale and Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	175	170
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Gain	2	6
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Loss	(4)	(2)
Debt Securities, Available-for-Sale and Held-to-Maturity, Fair Value	173	174
Fair Value, Inputs, Level 2 [Member] | Residential Mortgage Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-Sale and Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	1,402	1,407
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Gain	12	58
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Loss	(41)	(15)
Debt Securities, Available-for-Sale and Held-to-Maturity, Fair Value	1,373	1,450
Fair Value, Inputs, Level 2 [Member] | Asset-backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-Sale and Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	218	274
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Gain	1	2
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Loss	(23)	(10)
Debt Securities, Available-for-Sale and Held-to-Maturity, Fair Value	196	266
Fair Value, Inputs, Level 2 [Member] | Preferred Stock securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-Sale and Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	4,670	4,843
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Gain	7	4
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Loss	(656)	(1,024)
Debt Securities, Available-for-Sale and Held-to-Maturity, Fair Value	4,021	3,823
Fair Value, Inputs, Level 1 [Member] | US Common Stock Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-Sale and Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	1,704,750	1,648,785
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Gain	466,482	624,349
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Loss	(99,739)	(56,092)
Debt Securities, Available-for-Sale and Held-to-Maturity, Fair Value	2,071,493	2,217,042
Fair Value, Inputs, Level 1 [Member] | Canada Common Stock Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-Sale and Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	46,313	34,787
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Gain	21,123	19,617
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Loss	(5,844)	(898)
Debt Securities, Available-for-Sale and Held-to-Maturity, Fair Value	61,592	53,506
Fair Value, Inputs, Level 1 [Member] | Other International Common Stock Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-Sale and Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	141,765	129,486
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Gain	23,727	42,171
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Loss	(16,564)	(9,819)
Debt Securities, Available-for-Sale and Held-to-Maturity, Fair Value	148,928	161,838
Fair Value, Inputs, Level 1 [Member] | Equity Funds [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-Sale and Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	890,185	875,828
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Gain	122,597	140,893
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Loss	(45,197)	(10,116)
Debt Securities, Available-for-Sale and Held-to-Maturity, Fair Value	967,585	1,006,605
Fair Value, Inputs, Level 1 [Member] | Fixed Income Funds [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-Sale and Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	1,094,784	1,025,327
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Gain	17,540	12,560
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Loss	(64,350)	(18,675)
Debt Securities, Available-for-Sale and Held-to-Maturity, Fair Value	1,047,974	1,019,212
Fair Value, Inputs, Level 3 [Member] | Other Investments [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-Sale and Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	187	187
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Gain	1	1
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Loss	0	0
Debt Securities, Available-for-Sale and Held-to-Maturity, Fair Value	188	188
Reported Value Measurement [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-Sale and Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	1,523,742
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Gain	361,038
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Loss	(25,845)
Debt Securities, Available-for-Sale and Held-to-Maturity, Fair Value	1,858,935
Reported Value Measurement [Member] | Commingled funds - Fixed inc [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-Sale and Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	677,856	662,125
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Gain	84,337	115,939
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Loss	(22,753)	(3,171)
Debt Securities, Available-for-Sale and Held-to-Maturity, Fair Value	739,440	774,893
Reported Value Measurement [Member] | Commingled funds - Equity [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-Sale and Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	231,312	230,926
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Gain	129,968	161,125
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Loss	(1,155)	(114)
Debt Securities, Available-for-Sale and Held-to-Maturity, Fair Value	360,125	391,937
Reported Value Measurement [Member] | Money Market Funds [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-Sale and Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	322,089	408,762
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Gain	0	0
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Loss	0	0
Debt Securities, Available-for-Sale and Held-to-Maturity, Fair Value	322,089	408,762
Reported Value Measurement [Member] | Private Equity Funds [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-Sale and Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	292,485	292,888
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Gain	146,733	128,197
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Loss	(1,937)	(5,353)
Debt Securities, Available-for-Sale and Held-to-Maturity, Fair Value	437,281	415,732
Reported Value Measurement [Member] | Reported At Net Asset Value [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-Sale and Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss		1,594,701
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Gain		405,261
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Loss		(8,638)
Debt Securities, Available-for-Sale and Held-to-Maturity, Fair Value		1,991,324
Estimate of Fair Value Measurement [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-Sale and Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	5,489,768	5,396,678
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Gain	1,012,851	1,245,745
Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Loss	(259,307)	(105,572)
Debt Securities, Available-for-Sale and Held-to-Maturity, Fair Value	$ 6,243,312	$ 6,536,851