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INVESTMENTS (DETAILS 10) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value (fixed maturities) | $ 11,719,749 | $ 12,129,273
Non-US Government [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value (fixed maturities) | 739,005 | 1,033,543
Non-US Government [Member] | eurozone [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value (fixed maturities) | 21,000 | 119,000
CMBS [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value (fixed maturities) | $ 1,083,298 | $ 1,096,888
CMBS [Member] | Weighted Average [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Subordination percentage input for determining credit losses | 32.00% | 30.00%
Non-Agency RMBS [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value (fixed maturities) | $ 101,008 | $ 73,086
Non-Agency RMBS [Member] | Prime [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value (fixed maturities) | 82,000 | 49,000
Non-Agency RMBS [Member] | Alt A [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value (fixed maturities) | $ 13,000 | $ 17,000

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