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INVESTMENTS (DETAILS) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | $ 11,523,316 | $ 11,897,639
Gross Unrealized Gains (fixed maturities) | 70,993 | 52,518
Gross Unrealized Losses (fixed maturities) | (197,195) | (230,408)
Fair Value (fixed maturities) | 11,397,114 | 11,719,749
Non-credit OTTI in AOCI | (823) | (875)
Cost | 597,366 | 575,776
Gross Unrealized Gains (equities) | 53,446 | 31,211
Gross Unrealized Losses (equities) | (12,068) | (8,989)
Fair Value (equities) | 638,744 | 597,998
US Government and Agency [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | 1,681,425 | 1,673,617
Gross Unrealized Gains (fixed maturities) | 1,648 | 1,545
Gross Unrealized Losses (fixed maturities) | (27,004) | (23,213)
Fair Value (fixed maturities) | 1,656,069 | 1,651,949
Non-credit OTTI in AOCI | 0 | 0
Non-US Government [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | 613,282 | 809,025
Gross Unrealized Gains (fixed maturities) | 2,206 | 2,312
Gross Unrealized Losses (fixed maturities) | (49,654) | (72,332)
Fair Value (fixed maturities) | 565,834 | 739,005
Non-credit OTTI in AOCI | 0 | 0
Corporate Debt [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | 4,633,834 | 4,442,315
Gross Unrealized Gains (fixed maturities) | 42,049 | 16,740
Gross Unrealized Losses (fixed maturities) | (75,140) | (96,286)
Fair Value (fixed maturities) | 4,600,743 | 4,362,769
Non-credit OTTI in AOCI | 0 | 0
Agency RMBS [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | 2,487,837 | 2,236,138
Gross Unrealized Gains (fixed maturities) | 13,275 | 22,773
Gross Unrealized Losses (fixed maturities) | (35,977) | (9,675)
Fair Value (fixed maturities) | 2,465,135 | 2,249,236
Non-credit OTTI in AOCI | 0 | 0
CMBS [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | 664,368 | 1,088,595
Gross Unrealized Gains (fixed maturities) | 5,433 | 3,885
Gross Unrealized Losses (fixed maturities) | (3,564) | (9,182)
Fair Value (fixed maturities) | 666,237 | 1,083,298
Non-credit OTTI in AOCI | 0 | 0
Non-Agency RMBS [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | 57,316 | 99,989
Gross Unrealized Gains (fixed maturities) | 1,628 | 1,992
Gross Unrealized Losses (fixed maturities) | (2,023) | (973)
Fair Value (fixed maturities) | 56,921 | 101,008
Non-credit OTTI in AOCI | (823) | (875)
ABS [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | 1,221,813 | 1,387,919
Gross Unrealized Gains (fixed maturities) | 3,244 | 952
Gross Unrealized Losses (fixed maturities) | (2,843) | (17,601)
Fair Value (fixed maturities) | 1,222,214 | 1,371,270
Non-credit OTTI in AOCI | 0 | 0
Municipals [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | 163,441 | 160,041
Gross Unrealized Gains (fixed maturities) | 1,510 | 2,319
Gross Unrealized Losses (fixed maturities) | (990) | (1,146)
Fair Value (fixed maturities) | 163,961 | 161,214
Non-credit OTTI in AOCI | 0 | 0
Common Stock [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Cost | 379 | 0
Gross Unrealized Gains (equities) | 41 | 0
Gross Unrealized Losses (equities) | (342) | 0
Fair Value (equities) | 78 | 0
Exchange-Traded Funds [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Cost | 463,936 | 447,524
Gross Unrealized Gains (equities) | 53,405 | 31,211
Gross Unrealized Losses (equities) | (2,634) | (4,762)
Fair Value (equities) | 514,707 | 473,973
Bond Mutual Funds [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Cost | 133,051 | 128,252
Gross Unrealized Gains (equities) | 0 | 0
Gross Unrealized Losses (equities) | (9,092) | (4,227)
Fair Value (equities) | $ 123,959 | $ 124,025

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- Definition Accumulated other comprehensive loss related to portion of other than temporary impairment (OTTI) due to factors other than credit losses on debt securities categorized as available-for-sale that an entity does not intend to sell and which it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis of the debt security. + References No definition available. + Details
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