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Preneed Activities Schedule of Available-for-sale Securities (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | $ 3,260,648 |
Available-for-sale Securities, Gross Unrealized Gains | 367,569 |
Available-for-sale Securities, Gross Unrealized Losses | (57,889) |
Available-for-sale Securities, Fair Value | 3,570,328 |
Estimate of Fair Value Measurement [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis |  | $ 3,032,413
Available-for-sale Securities, Gross Unrealized Gains |  | 196,492
Available-for-sale Securities, Gross Unrealized Losses |  | (151,197)
Available-for-sale Securities, Fair Value |  | 3,077,708
Fair Value, Inputs, Level 2 [Member] | US Treasury Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 48,805 | 145,315
Available-for-sale Securities, Gross Unrealized Gains | 14 | 884
Available-for-sale Securities, Gross Unrealized Losses | (117) | (838)
Available-for-sale Securities, Fair Value | 48,702 | 145,361
Fair Value, Inputs, Level 2 [Member] | Foreign Government Debt Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 81,500 | 79,141
Available-for-sale Securities, Gross Unrealized Gains | 160 | 409
Available-for-sale Securities, Gross Unrealized Losses | (1,089) | (222)
Available-for-sale Securities, Fair Value | 80,571 | 79,328
Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 13,540 | 18,934
Available-for-sale Securities, Gross Unrealized Gains | 327 | 295
Available-for-sale Securities, Gross Unrealized Losses | (170) | (227)
Available-for-sale Securities, Fair Value | 13,697 | 19,002
Fair Value, Inputs, Level 2 [Member] | Residential Mortgage Backed Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 3,279 | 333
Available-for-sale Securities, Gross Unrealized Gains | 16 | 1
Available-for-sale Securities, Gross Unrealized Losses | (14) | (1)
Available-for-sale Securities, Fair Value | 3,281 | 333
Fair Value, Inputs, Level 2 [Member] | Asset-backed Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 320 | 448
Available-for-sale Securities, Gross Unrealized Gains | 15 | 16
Available-for-sale Securities, Gross Unrealized Losses | (10) | (31)
Available-for-sale Securities, Fair Value | 325 | 433
Fair Value, Inputs, Level 2 [Member] | Preferred Stock securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 7,834 | 2,907
Available-for-sale Securities, Gross Unrealized Gains | 385 | 83
Available-for-sale Securities, Gross Unrealized Losses | (139) | (156)
Available-for-sale Securities, Fair Value | 8,080 | 2,834
Fair Value, Inputs, Level 1 [Member] | US Common Stock Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 1,161,015 | 1,107,942
Available-for-sale Securities, Gross Unrealized Gains | 266,822 | 151,146
Available-for-sale Securities, Gross Unrealized Losses | (24,739) | (35,542)
Available-for-sale Securities, Fair Value | 1,403,098 | 1,223,546
Fair Value, Inputs, Level 1 [Member] | Canada Common Stock Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 30,762 | 25,708
Available-for-sale Securities, Gross Unrealized Gains | 12,545 | 10,030
Available-for-sale Securities, Gross Unrealized Losses | (522) | (455)
Available-for-sale Securities, Fair Value | 42,785 | 35,283
Fair Value, Inputs, Level 1 [Member] | Other International Common Stock Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 63,510 | 83,238
Available-for-sale Securities, Gross Unrealized Gains | 13,174 | 4,995
Available-for-sale Securities, Gross Unrealized Losses | (2,834) | (10,632)
Available-for-sale Securities, Fair Value | 73,850 | 77,601
Fair Value, Inputs, Level 1 [Member] | Equity Funds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 613,934 | 688,120
Available-for-sale Securities, Gross Unrealized Gains | 59,100 | 19,962
Available-for-sale Securities, Gross Unrealized Losses | (4,312) | (56,857)
Available-for-sale Securities, Fair Value | 668,722 | 651,225
Fair Value, Inputs, Level 1 [Member] | Fixed Income Funds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 1,230,196 | 875,615
Available-for-sale Securities, Gross Unrealized Gains | 11,897 | 6,203
Available-for-sale Securities, Gross Unrealized Losses | (23,943) | (46,219)
Available-for-sale Securities, Fair Value | 1,218,150 | 835,599
Fair Value, Inputs, Level 3 [Member] | Other Investments [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 5,953 | 4,712
Available-for-sale Securities, Gross Unrealized Gains | 3,114 | 2,468
Available-for-sale Securities, Gross Unrealized Losses | 0 | (17)
Available-for-sale Securities, Fair Value | 9,067 | 7,163
Reported Value Measurement [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 1,122,537 |
Available-for-sale Securities, Gross Unrealized Gains | 64,692 |
Available-for-sale Securities, Gross Unrealized Losses | (8,009) |
Available-for-sale Securities, Fair Value | 1,179,220 |
Reported Value Measurement [Member] | Commingled funds - Fixed inc [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 454,242 | 692,434
Available-for-sale Securities, Gross Unrealized Gains | 235 | 8,524
Available-for-sale Securities, Gross Unrealized Losses | (5,860) | (12,234)
Available-for-sale Securities, Fair Value | 448,617 | 688,724
Reported Value Measurement [Member] | Commingled funds - Equity [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 214,000 |
Available-for-sale Securities, Gross Unrealized Gains | 12,826 |
Available-for-sale Securities, Gross Unrealized Losses | 0 |
Available-for-sale Securities, Fair Value | 226,826 |
Reported Value Measurement [Member] | Money Market Funds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 287,435 | 304,055
Available-for-sale Securities, Gross Unrealized Gains | 0 | 0
Available-for-sale Securities, Gross Unrealized Losses | 0 | 0
Available-for-sale Securities, Fair Value | 287,435 | 304,055
Reported Value Measurement [Member] | Private Equity Funds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 166,860 | 175,881
Available-for-sale Securities, Gross Unrealized Gains | 51,631 | 9,812
Available-for-sale Securities, Gross Unrealized Losses | (2,149) | (15,217)
Available-for-sale Securities, Fair Value | 216,342 | 170,476
Reported Value Measurement [Member] | Reported At Net Asset Value [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis |  | 1,172,370
Available-for-sale Securities, Gross Unrealized Gains |  | 18,336
Available-for-sale Securities, Gross Unrealized Losses |  | (27,451)
Available-for-sale Securities, Fair Value |  | 1,163,255
Estimate of Fair Value Measurement [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Amortized Cost Basis | 4,383,185 | 4,204,783
Available-for-sale Securities, Gross Unrealized Gains | 432,261 | 214,828
Available-for-sale Securities, Gross Unrealized Losses | (65,898) | (178,648)
Available-for-sale Securities, Fair Value | $ 4,749,548 | $ 4,240,963

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