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Preneed Activities Schedule of Available-for-sale Securities (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost Basis | $ 3,275,460 | $ 3,260,648
Accumulated Gross Unrealized Gain, before Tax | 326,010 | 367,569
Accumulated Gross Unrealized Loss, before Tax | (96,279) | (57,889)
Available-for-sale Securities, Fair Value | 3,505,191 | 3,570,328
Reported at net asset value |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost Basis | 1,107,497 | 1,122,537
Accumulated Gross Unrealized Gain, before Tax | 69,465 | 64,692
Accumulated Gross Unrealized Loss, before Tax | (15,508) | (8,009)
Available-for-sale Securities, Fair Value | 1,161,454 | 1,179,220
Estimate of Fair Value Measurement [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost Basis | 4,382,957 | 4,383,185
Accumulated Gross Unrealized Gain, before Tax | 395,475 | 432,261
Accumulated Gross Unrealized Loss, before Tax | (111,787) | (65,898)
Available-for-sale Securities, Fair Value | 4,666,645 | 4,749,548
Fixed Income Commingled funds [Member] | Reported at net asset value |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost Basis | 417,729 | 454,242
Accumulated Gross Unrealized Gain, before Tax | 41 | 235
Accumulated Gross Unrealized Loss, before Tax | (12,473) | (5,860)
Available-for-sale Securities, Fair Value | 405,297 | 448,617
Commingled funds - Equity [Member] | Reported at net asset value |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost Basis | 223,207 | 214,000
Accumulated Gross Unrealized Gain, before Tax | 10,312 | 12,826
Accumulated Gross Unrealized Loss, before Tax | (647) | 0
Available-for-sale Securities, Fair Value | 232,872 | 226,826
Private Equity Funds | Reported at net asset value |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost Basis | 172,522 | 166,860
Accumulated Gross Unrealized Gain, before Tax | 59,112 | 51,631
Accumulated Gross Unrealized Loss, before Tax | (2,388) | (2,149)
Available-for-sale Securities, Fair Value | 229,246 | 216,342
Money Market Funds [Member] | Reported at net asset value |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost Basis | 294,039 | 287,435
Accumulated Gross Unrealized Gain, before Tax | 0 | 0
Accumulated Gross Unrealized Loss, before Tax | 0 | 0
Available-for-sale Securities, Fair Value | 294,039 | 287,435
Fair Value, Inputs, Level 2 | US Treasury Securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost Basis | 47,338 | 48,805
Accumulated Gross Unrealized Gain, before Tax | 12 | 14
Accumulated Gross Unrealized Loss, before Tax | (429) | (117)
Available-for-sale Securities, Fair Value | 46,921 | 48,702
Fair Value, Inputs, Level 2 | Foreign Government Debt Securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost Basis | 60,522 | 81,500
Accumulated Gross Unrealized Gain, before Tax | 78 | 160
Accumulated Gross Unrealized Loss, before Tax | (1,379) | (1,089)
Available-for-sale Securities, Fair Value | 59,221 | 80,571
Fair Value, Inputs, Level 2 | Corporate Debt Securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost Basis | 12,402 | 13,540
Accumulated Gross Unrealized Gain, before Tax | 269 | 327
Accumulated Gross Unrealized Loss, before Tax | (260) | (170)
Available-for-sale Securities, Fair Value | 12,411 | 13,697
Fair Value, Inputs, Level 2 | Residential Mortgage Backed Securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost Basis | 3,312 | 3,279
Accumulated Gross Unrealized Gain, before Tax | 16 | 16
Accumulated Gross Unrealized Loss, before Tax | (61) | (14)
Available-for-sale Securities, Fair Value | 3,267 | 3,281
Fair Value, Inputs, Level 2 | Asset-backed Securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost Basis | 305 | 320
Accumulated Gross Unrealized Gain, before Tax | 11 | 15
Accumulated Gross Unrealized Loss, before Tax | (11) | (10)
Available-for-sale Securities, Fair Value | 305 | 325
Fair Value, Inputs, Level 2 | Preferred Stock Securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost Basis | 7,120 | 7,834
Accumulated Gross Unrealized Gain, before Tax | 363 | 385
Accumulated Gross Unrealized Loss, before Tax | (172) | (139)
Available-for-sale Securities, Fair Value | 7,311 | 8,080
Fair Value, Inputs, Level 1 | US Common Stock Securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost Basis | 1,208,816 | 1,161,015
Accumulated Gross Unrealized Gain, before Tax | 241,804 | 266,822
Accumulated Gross Unrealized Loss, before Tax | (46,846) | (24,739)
Available-for-sale Securities, Fair Value | 1,403,774 | 1,403,098
Fair Value, Inputs, Level 1 | Canada Common Stock Securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost Basis | 30,150 | 30,762
Accumulated Gross Unrealized Gain, before Tax | 9,751 | 12,545
Accumulated Gross Unrealized Loss, before Tax | (1,503) | (522)
Available-for-sale Securities, Fair Value | 38,398 | 42,785
Fair Value, Inputs, Level 1 | Other International Common Stock Securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost Basis | 63,594 | 63,510
Accumulated Gross Unrealized Gain, before Tax | 12,741 | 13,174
Accumulated Gross Unrealized Loss, before Tax | (3,280) | (2,834)
Available-for-sale Securities, Fair Value | 73,055 | 73,850
Fair Value, Inputs, Level 1 | Equity Funds |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost Basis | 696,520 | 613,934
Accumulated Gross Unrealized Gain, before Tax | 53,631 | 59,100
Accumulated Gross Unrealized Loss, before Tax | (9,364) | (4,312)
Available-for-sale Securities, Fair Value | 740,787 | 668,722
Fair Value, Inputs, Level 1 | Fixed Income Funds |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost Basis | 1,139,940 | 1,230,196
Accumulated Gross Unrealized Gain, before Tax | 4,227 | 11,897
Accumulated Gross Unrealized Loss, before Tax | (32,959) | (23,943)
Available-for-sale Securities, Fair Value | 1,111,208 | 1,218,150
Fair Value, Inputs, Level 3 | Other Investments |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost Basis | 5,441 | 5,953
Accumulated Gross Unrealized Gain, before Tax | 3,107 | 3,114
Accumulated Gross Unrealized Loss, before Tax | (15) | 0
Available-for-sale Securities, Fair Value | $ 8,533 | $ 9,067

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