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Preneed Activities Schedule of Available-for-sale Securities (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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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

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