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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] |
Cost | $ 6,698,328
Amount Shown in Balance Sheet | 7,262,234
Fixed maturity securities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 5,788,551
Fair Value | 6,345,290
Amount Shown in Balance Sheet | 6,345,290
Equity securities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 121,653
Fair Value | 121,653
Amount Shown in Balance Sheet | 121,653
U.S. Government and federally sponsored agency obligations | Fixed maturity securities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 814,204
Fair Value | 901,517
Amount Shown in Balance Sheet | 901,517
States, municipalities and political subdivisions | Fixed maturity securities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 1,612,290
Fair Value | 1,827,497
Amount Shown in Balance Sheet | 1,827,497
Foreign government bonds | Fixed maturity securities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 40,145
Fair Value | 45,053
Amount Shown in Balance Sheet | 45,053
Public utilities | Fixed maturity securities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 64,898
Fair Value | 76,382
Amount Shown in Balance Sheet | 76,382
All other corporate bonds | Fixed maturity securities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 1,811,755
Fair Value | 2,015,192
Amount Shown in Balance Sheet | 2,015,192
Asset-backed securities | Fixed maturity securities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 1,053,252
Fair Value | 1,051,258
Amount Shown in Balance Sheet | 1,051,258
Residential mortgage-backed securities (non-agency) | Fixed maturity securities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 53,727
Fair Value | 53,627
Amount Shown in Balance Sheet | 53,627
Commercial mortgage-backed securities | Fixed maturity securities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 309,726
Fair Value | 343,439
Amount Shown in Balance Sheet | 343,439
Redeemable preferred stocks | Fixed maturity securities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 28,554
Fair Value | 31,325
Amount Shown in Balance Sheet | 31,325
Industrial, miscellaneous and all other | Equity securities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 5,645
Fair Value | 5,645
Amount Shown in Balance Sheet | 5,645
Banking & finance and insurance companies | Equity securities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 1,852
Fair Value | 1,852
Amount Shown in Balance Sheet | 1,852
Public utilities | Equity securities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 388
Fair Value | 388
Amount Shown in Balance Sheet | 388
Non-redeemable preferred stocks | Equity securities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 90,709
Fair Value | 90,709
Amount Shown in Balance Sheet | 90,709
Closed-end fund | Equity securities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 23,059
Fair Value | 23,059
Amount Shown in Balance Sheet | 23,059
Limited partnership interests |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 448,996
Amount Shown in Balance Sheet | 448,996
Short-term Investments |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 141,770
Amount Shown in Balance Sheet | 141,770
Policy loans |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 150,118
Amount Shown in Balance Sheet | 150,118
Derivatives |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 9,638
Fair Value | 16,805
Amount Shown in Balance Sheet | 16,805
Mortgage loans |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 18,150
Amount Shown in Balance Sheet | 18,150
Other |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 19,452
Amount Shown in Balance Sheet | $ 19,452

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