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INVESTMENTS (Details 3) $ in Thousands | Sep. 30, 2017 USD ($) security | Dec. 31, 2016 USD ($) security
--- | --- | ---
Fixed Maturities [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value - 12 months or greater | $ 1,048,555 | $ 971,489
Unrealized Losses - 12 months or greater | (35,602) | (77,645)
Fair Value - Less than 12 months | 4,075,646 | 5,833,715
Unrealized Losses - Less than 12 months | (29,417) | (119,550)
Total Fair Value of Securities in Unrealized Loss Position | 5,124,201 | 6,805,204
Total Unrealized Losses | $ (65,019) | $ (197,195)
Number of Available For Sale Securities In Unrealized Loss Positions | security | 1,625 | 1,881
Number of Available For Sale Securities in Unrealized Loss Positions for 12 Months or Greater | security | 403 | 330
Fixed Maturities [Member] | Below Investment Grade or Not Rated [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Total Unrealized Losses | $ (6,000) | $ (15,000)
US Government and Agency [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value - 12 months or greater | 161,425 | 54,051
Unrealized Losses - 12 months or greater | (5,641) | (2,729)
Fair Value - Less than 12 months | 1,207,943 | 1,340,719
Unrealized Losses - Less than 12 months | (6,733) | (24,275)
Total Fair Value of Securities in Unrealized Loss Position | 1,369,368 | 1,394,770
Total Unrealized Losses | (12,374) | (27,004)
Non-US Government [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value - 12 months or greater | 61,872 | 149,360
Unrealized Losses - 12 months or greater | (7,354) | (38,683)
Fair Value - Less than 12 months | 163,477 | 283,796
Unrealized Losses - Less than 12 months | (1,190) | (10,971)
Total Fair Value of Securities in Unrealized Loss Position | 225,349 | 433,156
Total Unrealized Losses | (8,544) | (49,654)
Corporate Debt [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value - 12 months or greater | 412,832 | 230,218
Unrealized Losses - 12 months or greater | (12,553) | (30,652)
Fair Value - Less than 12 months | 990,308 | 1,948,976
Unrealized Losses - Less than 12 months | (9,047) | (44,488)
Total Fair Value of Securities in Unrealized Loss Position | 1,403,140 | 2,179,194
Total Unrealized Losses | (21,600) | (75,140)
Agency RMBS [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value - 12 months or greater | 350,010 | 76,694
Unrealized Losses - 12 months or greater | (8,130) | (1,101)
Fair Value - Less than 12 months | 1,126,956 | 1,724,170
Unrealized Losses - Less than 12 months | (10,362) | (34,876)
Total Fair Value of Securities in Unrealized Loss Position | 1,476,966 | 1,800,864
Total Unrealized Losses | (18,492) | (35,977)
CMBS [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value - 12 months or greater | 13,919 | 84,640
Unrealized Losses - 12 months or greater | (238) | (749)
Fair Value - Less than 12 months | 221,941 | 193,499
Unrealized Losses - Less than 12 months | (1,500) | (2,815)
Total Fair Value of Securities in Unrealized Loss Position | 235,860 | 278,139
Total Unrealized Losses | (1,738) | (3,564)
Non-Agency RMBS [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value - 12 months or greater | 8,342 | 13,642
Unrealized Losses - 12 months or greater | (803) | (1,752)
Fair Value - Less than 12 months | 222 | 7,194
Unrealized Losses - Less than 12 months | (1) | (271)
Total Fair Value of Securities in Unrealized Loss Position | 8,564 | 20,836
Total Unrealized Losses | (804) | (2,023)
ABS [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value - 12 months or greater | 16,816 | 362,110
Unrealized Losses - 12 months or greater | (409) | (1,950)
Fair Value - Less than 12 months | 323,886 | 266,763
Unrealized Losses - Less than 12 months | (373) | (893)
Total Fair Value of Securities in Unrealized Loss Position | 340,702 | 628,873
Total Unrealized Losses | (782) | (2,843)
Municipals [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value - 12 months or greater | 23,339 | 774
Unrealized Losses - 12 months or greater | (474) | (29)
Fair Value - Less than 12 months | 40,913 | 68,598
Unrealized Losses - Less than 12 months | (211) | (961)
Total Fair Value of Securities in Unrealized Loss Position | 64,252 | 69,372
Total Unrealized Losses | (685) | (990)
Equity Securities [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value - 12 months or greater | 33 | 4,959
Unrealized Losses - 12 months or greater | (135) | (461)
Fair Value - Less than 12 months | 27,084 | 211,751
Unrealized Losses - Less than 12 months | (2,107) | (11,607)
Total Fair Value of Securities in Unrealized Loss Position | 27,117 | 216,710
Total Unrealized Losses | $ (2,242) | $ (12,068)
Number of Available For Sale Securities In Unrealized Loss Positions | security | 31 | 23
Number of Available For Sale Securities in Unrealized Loss Positions for 12 Months or Greater | security | 2 | 3
Common Stock [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value - 12 months or greater | $ 33 | $ 0
Unrealized Losses - 12 months or greater | (135) | 0
Fair Value - Less than 12 months | 2,939 | 37
Unrealized Losses - Less than 12 months | (434) | (342)
Total Fair Value of Securities in Unrealized Loss Position | 2,972 | 37
Total Unrealized Losses | (569) | (342)
Exchange-Traded Funds [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value - 12 months or greater | 0 | 4,959
Unrealized Losses - 12 months or greater | 0 | (461)
Fair Value - Less than 12 months | 0 | 87,760
Unrealized Losses - Less than 12 months | 0 | (2,173)
Total Fair Value of Securities in Unrealized Loss Position | 0 | 92,719
Total Unrealized Losses | 0 | (2,634)
Bond Mutual Funds [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value - 12 months or greater | 0 | 0
Unrealized Losses - 12 months or greater | 0 | 0
Fair Value - Less than 12 months | 24,145 | 123,954
Unrealized Losses - Less than 12 months | (1,673) | (9,092)
Total Fair Value of Securities in Unrealized Loss Position | 24,145 | 123,954
Total Unrealized Losses | $ (1,673) | $ (9,092)

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