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SCHEDULE I - SUMMARY OF INVESTMENTS - OTHER THAN INVESTMENTS IN RELATED PARTIES (Details) $ in Thousands | Dec. 31, 2020 USD ($)
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SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Amortized Cost | $ 6,334,686
Fair Value | 6,679,811
Amount at which shown in the balance sheet | 6,679,811
Fixed income |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Amortized Cost | 6,317,164
Fair Value | 6,661,596
Amount at which shown in the balance sheet | 6,661,596
Fixed income | U.S. Treasury securities and obligations of U.S. government corporations and agencies |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Amortized Cost | 264,531
Fair Value | 265,693
Amount at which shown in the balance sheet | 265,693
Fixed income | Obligations of U.S. states and political subdivisions |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Amortized Cost | 2,083,568
Fair Value | 2,249,869
Amount at which shown in the balance sheet | 2,249,869
Fixed income | Debt securities issued by foreign sovereign governments |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Amortized Cost | 4,485
Fair Value | 4,709
Amount at which shown in the balance sheet | 4,709
Fixed income | Public utilities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Amortized Cost | 303,285
Fair Value | 303,011
Amount at which shown in the balance sheet | 303,011
Fixed income | ABS |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Amortized Cost | 203,807
Fair Value | 206,686
Amount at which shown in the balance sheet | 206,686
Fixed income | Collateralized loan obligations |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Amortized Cost | 310,616
Fair Value | 310,490
Amount at which shown in the balance sheet | 310,490
Fixed income | Mortgage-backed |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Amortized Cost | 738,104
Fair Value | 758,668
Amount at which shown in the balance sheet | 758,668
Fixed income | All other corporate bonds |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Amortized Cost | 2,387,575
Fair Value | 2,541,277
Amount at which shown in the balance sheet | 2,541,277
Fixed income | Other investments |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Amortized Cost | 21,193
Fair Value | 21,193
Amount at which shown in the balance sheet | 21,193
Equity Securities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Amortized Cost | 17,522
Fair Value | 18,215
Amount at which shown in the balance sheet | 18,215
Equity Securities | Industrial, miscellaneous and all other |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Amortized Cost | 17,522
Fair Value | 18,215
Amount at which shown in the balance sheet | $ 18,215

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