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Preneed Activities Schedule of Available-for-sale Securities (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
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Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | $ 3,625,279 |
Available-for-sale Securities, Gross Unrealized Gains | 912,429 |
Available-for-sale Securities, Gross Unrealized Losses | (45,584) |
Available-for-sale Securities, Fair Value | 4,492,124 |
Estimate of Fair Value Measurement [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis |  | $ 3,569,675
Available-for-sale Securities, Gross Unrealized Gains |  | 687,303
Available-for-sale Securities, Gross Unrealized Losses |  | (88,603)
Available-for-sale Securities, Fair Value |  | 4,168,375
Fair Value, Inputs, Level 2 [Member] | US Treasury Securities [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 45,983 | 44,907
Available-for-sale Securities, Gross Unrealized Gains | 1,146 | 1,566
Available-for-sale Securities, Gross Unrealized Losses | (277) | (272)
Available-for-sale Securities, Fair Value | 46,852 | 46,201
Fair Value, Inputs, Level 2 [Member] | Debt Security, Government, Non-US [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 32,537 | 30,210
Available-for-sale Securities, Gross Unrealized Gains | 40 | 51
Available-for-sale Securities, Gross Unrealized Losses | (8) | (157)
Available-for-sale Securities, Fair Value | 32,569 | 30,104
Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 1,139 | 1,669
Available-for-sale Securities, Gross Unrealized Gains | 9 | 14
Available-for-sale Securities, Gross Unrealized Losses | (10) | (8)
Available-for-sale Securities, Fair Value | 1,138 | 1,675
Fair Value, Inputs, Level 2 [Member] | Residential Mortgage Backed Securities [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 1,073 | 2,438
Available-for-sale Securities, Gross Unrealized Gains | 79 | 131
Available-for-sale Securities, Gross Unrealized Losses | (5) | 0
Available-for-sale Securities, Fair Value | 1,147 | 2,569
Fair Value, Inputs, Level 2 [Member] | Asset-backed Securities [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 283 | 174
Available-for-sale Securities, Gross Unrealized Gains | 3 | 3
Available-for-sale Securities, Gross Unrealized Losses | (11) | (5)
Available-for-sale Securities, Fair Value | 275 | 172
Fair Value, Inputs, Level 2 [Member] | Preferred Stock securities [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 4,881 | 358
Available-for-sale Securities, Gross Unrealized Gains | 570 | 0
Available-for-sale Securities, Gross Unrealized Losses | 0 | (24)
Available-for-sale Securities, Fair Value | 5,451 | 334
Fair Value, Inputs, Level 1 [Member] | US Common Stock Securities [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 1,534,925 | 1,500,125
Available-for-sale Securities, Gross Unrealized Gains | 623,471 | 503,757
Available-for-sale Securities, Gross Unrealized Losses | (31,579) | (54,748)
Available-for-sale Securities, Fair Value | 2,126,817 | 1,949,134
Fair Value, Inputs, Level 1 [Member] | Canada Common Stock Securities [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 48,637 | 35,016
Available-for-sale Securities, Gross Unrealized Gains | 18,449 | 10,915
Available-for-sale Securities, Gross Unrealized Losses | (1,115) | (1,823)
Available-for-sale Securities, Fair Value | 65,971 | 44,108
Fair Value, Inputs, Level 1 [Member] | Other International Common Stock Securities [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 114,125 | 110,775
Available-for-sale Securities, Gross Unrealized Gains | 51,488 | 39,837
Available-for-sale Securities, Gross Unrealized Losses | (2,293) | (1,831)
Available-for-sale Securities, Fair Value | 163,320 | 148,781
Fair Value, Inputs, Level 1 [Member] | Equity Funds [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 807,456 | 821,406
Available-for-sale Securities, Gross Unrealized Gains | 175,706 | 95,155
Available-for-sale Securities, Gross Unrealized Losses | (3,506) | (10,437)
Available-for-sale Securities, Fair Value | 979,656 | 906,124
Fair Value, Inputs, Level 1 [Member] | Fixed Income Funds [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 1,034,053 | 1,022,409
Available-for-sale Securities, Gross Unrealized Gains | 41,466 | 35,872
Available-for-sale Securities, Gross Unrealized Losses | (6,780) | (19,298)
Available-for-sale Securities, Fair Value | 1,068,739 | 1,038,983
Fair Value, Inputs, Level 3 [Member] | Other Investments [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 187 | 188
Available-for-sale Securities, Gross Unrealized Gains | 2 | 2
Available-for-sale Securities, Gross Unrealized Losses | 0 | 0
Available-for-sale Securities, Fair Value | 189 | 190
Reported Value Measurement [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 1,613,049 |
Available-for-sale Securities, Gross Unrealized Gains | 242,896 |
Available-for-sale Securities, Gross Unrealized Losses | (9,649) |
Available-for-sale Securities, Fair Value | 1,846,296 |
Reported Value Measurement [Member] | Commingled funds - Fixed inc [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 659,509 | 657,219
Available-for-sale Securities, Gross Unrealized Gains | 35,879 | 37,474
Available-for-sale Securities, Gross Unrealized Losses | (2,229) | (173)
Available-for-sale Securities, Fair Value | 693,159 | 694,520
Reported Value Measurement [Member] | Commingled funds - Equity [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 274,669 | 283,329
Available-for-sale Securities, Gross Unrealized Gains | 122,299 | 97,704
Available-for-sale Securities, Gross Unrealized Losses | (21) | 0
Available-for-sale Securities, Fair Value | 396,947 | 381,033
Reported Value Measurement [Member] | Money Market Funds [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 399,566 | 330,745
Available-for-sale Securities, Gross Unrealized Gains | 0 | 0
Available-for-sale Securities, Gross Unrealized Losses | 0 | 0
Available-for-sale Securities, Fair Value | 399,566 | 330,745
Reported Value Measurement [Member] | Private Equity Funds [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 279,305 | 217,953
Available-for-sale Securities, Gross Unrealized Gains | 84,718 | 68,846
Available-for-sale Securities, Gross Unrealized Losses | (7,399) | (10,284)
Available-for-sale Securities, Fair Value | 356,624 | 276,515
Reported Value Measurement [Member] | Reported At Net Asset Value [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis |  | 1,489,246
Available-for-sale Securities, Gross Unrealized Gains |  | 204,024
Available-for-sale Securities, Gross Unrealized Losses |  | (10,457)
Available-for-sale Securities, Fair Value |  | 1,682,813
Estimate of Fair Value Measurement [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 5,238,328 | 5,058,921
Available-for-sale Securities, Gross Unrealized Gains | 1,155,325 | 891,327
Available-for-sale Securities, Gross Unrealized Losses | (55,233) | (99,060)
Available-for-sale Securities, Fair Value | $ 6,338,420 | $ 5,851,188

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