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SCHEDULE I - SUMMARY OF INVESTMENTS - OTHER THAN INVESTMENTS IN RELATED PARTIES (Details) $ in Thousands | Dec. 31, 2019 USD ($)
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SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Fair value | $ 13,892,441
Amount shown on the balance sheet | 14,302,375
Fixed maturities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Amortized cost | 12,263,240
Fair value | 12,468,205
Amount shown on the balance sheet | 12,468,205
U.S. government and agency |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Amortized cost | 2,102,849
Fair value | 2,112,881
Amount shown on the balance sheet | 2,112,881
Non-U.S. government |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Amortized cost | 564,505
Fair value | 576,592
Amount shown on the balance sheet | 576,592
Corporate debt |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Amortized cost | 4,797,384
Fair value | 4,930,254
Amount shown on the balance sheet | 4,930,254
Agency RMBS |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Amortized cost | 1,570,823
Fair value | 1,592,584
Amount shown on the balance sheet | 1,592,584
CMBS |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Amortized cost | 1,340,156
Fair value | 1,365,052
Amount shown on the balance sheet | 1,365,052
Non-Agency RMBS |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Amortized cost | 84,381
Fair value | 84,922
Amount shown on the balance sheet | 84,922
ABS |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Amortized cost | 1,599,867
Fair value | 1,598,693
Amount shown on the balance sheet | 1,598,693
Municipals |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Amortized cost | 203,275
Fair value | 207,227
Amount shown on the balance sheet | 207,227
Mortgage loans |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Fair value | 432,748
Amount shown on the balance sheet | 432,748
Short-term investments |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Fair value | 38,471
Amount shown on the balance sheet | 38,471
Equity securities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Fair value | 474,207
Amount shown on the balance sheet | 474,207
Other Investments |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Fair value | 478,810
Amount shown on the balance sheet | 770,923
Equity method investments |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Fair value | 0
Amount shown on the balance sheet | $ 117,821

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