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Preneed Activities Schedule of Available-for-sale Securities (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
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 |
Estimate of Fair Value Measurement [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis |  | $ 3,600,688
Available-for-sale Securities, Gross Unrealized Gains |  | 385,203
Available-for-sale Securities, Gross Unrealized Losses |  | (126,983)
Available-for-sale Securities, Fair Value |  | 3,858,908
Fair Value, Inputs, Level 2 [Member] | US Treasury Securities [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 44,907 | 49,728
Available-for-sale Securities, Gross Unrealized Gains | 1,566 | 752
Available-for-sale Securities, Gross Unrealized Losses | (272) | (130)
Available-for-sale Securities, Fair Value | 46,201 | 50,350
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 | 30,210 | 41,093
Available-for-sale Securities, Gross Unrealized Gains | 51 | 76
Available-for-sale Securities, Gross Unrealized Losses | (157) | (850)
Available-for-sale Securities, Fair Value | 30,104 | 40,319
Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 1,669 | 9,694
Available-for-sale Securities, Gross Unrealized Gains | 14 | 28
Available-for-sale Securities, Gross Unrealized Losses | (8) | (172)
Available-for-sale Securities, Fair Value | 1,675 | 9,550
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 | 2,438 | 3,210
Available-for-sale Securities, Gross Unrealized Gains | 131 | 59
Available-for-sale Securities, Gross Unrealized Losses | 0 | (1)
Available-for-sale Securities, Fair Value | 2,569 | 3,268
Fair Value, Inputs, Level 2 [Member] | Asset-backed Securities [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 174 | 129
Available-for-sale Securities, Gross Unrealized Gains | 3 | 3
Available-for-sale Securities, Gross Unrealized Losses | (5) | (4)
Available-for-sale Securities, Fair Value | 172 | 128
Fair Value, Inputs, Level 2 [Member] | Preferred Stock securities [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 358 | 6,338
Available-for-sale Securities, Gross Unrealized Gains | 0 | 804
Available-for-sale Securities, Gross Unrealized Losses | (24) | (115)
Available-for-sale Securities, Fair Value | 334 | 7,027
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 | 1,500,125 | 1,349,828
Available-for-sale Securities, Gross Unrealized Gains | 503,757 | 303,766
Available-for-sale Securities, Gross Unrealized Losses | (54,748) | (36,507)
Available-for-sale Securities, Fair Value | 1,949,134 | 1,617,087
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 | 35,016 | 43,866
Available-for-sale Securities, Gross Unrealized Gains | 10,915 | 12,369
Available-for-sale Securities, Gross Unrealized Losses | (1,823) | (2,075)
Available-for-sale Securities, Fair Value | 44,108 | 54,160
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 | 110,775 | 95,257
Available-for-sale Securities, Gross Unrealized Gains | 39,837 | 18,227
Available-for-sale Securities, Gross Unrealized Losses | (1,831) | (522)
Available-for-sale Securities, Fair Value | 148,781 | 112,962
Fair Value, Inputs, Level 1 [Member] | Equity Funds [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 821,406 | 746,581
Available-for-sale Securities, Gross Unrealized Gains | 95,155 | 31,511
Available-for-sale Securities, Gross Unrealized Losses | (10,437) | (54,020)
Available-for-sale Securities, Fair Value | 906,124 | 724,072
Fair Value, Inputs, Level 1 [Member] | Fixed Income Funds [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 1,022,409 | 1,247,930
Available-for-sale Securities, Gross Unrealized Gains | 35,872 | 16,424
Available-for-sale Securities, Gross Unrealized Losses | (19,298) | (32,587)
Available-for-sale Securities, Fair Value | 1,038,983 | 1,231,767
Fair Value, Inputs, Level 3 [Member] | Other Investments [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 188 | 7,034
Available-for-sale Securities, Gross Unrealized Gains | 2 | 1,184
Available-for-sale Securities, Gross Unrealized Losses | 0 | 0
Available-for-sale Securities, Fair Value | 190 | 8,218
Reported Value Measurement [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 |
Reported Value Measurement [Member] | Commingled funds - Fixed inc [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 657,219 | 444,744
Available-for-sale Securities, Gross Unrealized Gains | 37,474 | 5,077
Available-for-sale Securities, Gross Unrealized Losses | (173) | (1,731)
Available-for-sale Securities, Fair Value | 694,520 | 448,090
Reported Value Measurement [Member] | Commingled funds - Equity [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 283,329 | 249,980
Available-for-sale Securities, Gross Unrealized Gains | 97,704 | 47,631
Available-for-sale Securities, Gross Unrealized Losses | 0 | 0
Available-for-sale Securities, Fair Value | 381,033 | 297,611
Reported Value Measurement [Member] | Money Market Funds [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 330,745 | 397,461
Available-for-sale Securities, Gross Unrealized Gains | 0 | 0
Available-for-sale Securities, Gross Unrealized Losses | 0 | 0
Available-for-sale Securities, Fair Value | 330,745 | 397,461
Reported Value Measurement [Member] | Private Equity Funds [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 217,953 | 176,388
Available-for-sale Securities, Gross Unrealized Gains | 68,846 | 80,283
Available-for-sale Securities, Gross Unrealized Losses | (10,284) | (422)
Available-for-sale Securities, Fair Value | 276,515 | 256,249
Reported Value Measurement [Member] | Reported At Net Asset Value [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis |  | 1,268,573
Available-for-sale Securities, Gross Unrealized Gains |  | 132,991
Available-for-sale Securities, Gross Unrealized Losses |  | (2,153)
Available-for-sale Securities, Fair Value |  | 1,399,411
Estimate of Fair Value Measurement [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 5,058,921 | 4,869,261
Available-for-sale Securities, Gross Unrealized Gains | 891,327 | 518,194
Available-for-sale Securities, Gross Unrealized Losses | (99,060) | (129,136)
Available-for-sale Securities, Fair Value | $ 5,851,188 | $ 5,258,319

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