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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] |
Cost | $ 6,299,955
Amount Shown in Balance Sheet | 6,639,233
Fixed maturity securities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 5,456,980
Fair Value | 5,791,676
Amount Shown in Balance Sheet | 5,791,676
Equity securities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 101,864
Fair Value | 101,864
Amount Shown in Balance Sheet | 101,864
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 | 906,886
Fair Value | 956,104
Amount Shown in Balance Sheet | 956,104
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 | 1,545,787
Fair Value | 1,686,203
Amount Shown in Balance Sheet | 1,686,203
Foreign government bonds | Fixed maturity securities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 42,801
Fair Value | 45,370
Amount Shown in Balance Sheet | 45,370
Public utilities | Fixed maturity securities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 54,519
Fair Value | 61,748
Amount Shown in Balance Sheet | 61,748
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 | 1,388,035
Fair Value | 1,495,426
Amount Shown in Balance Sheet | 1,495,426
Asset-backed securities | Fixed maturity securities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 1,068,661
Fair Value | 1,079,586
Amount Shown in Balance Sheet | 1,079,586
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 | 76,237
Fair Value | 75,933
Amount Shown in Balance Sheet | 75,933
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 | 352,164
Fair Value | 367,055
Amount Shown in Balance Sheet | 367,055
Redeemable preferred stocks | Fixed maturity securities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 21,890
Fair Value | 24,251
Amount Shown in Balance Sheet | 24,251
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 | 13,360
Fair Value | 13,360
Amount Shown in Balance Sheet | 13,360
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 | 5,706
Fair Value | 5,706
Amount Shown in Balance Sheet | 5,706
Public utilities | Equity securities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 1,052
Fair Value | 1,052
Amount Shown in Balance Sheet | 1,052
Non-redeemable preferred stocks | Equity securities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 60,325
Fair Value | 60,325
Amount Shown in Balance Sheet | 60,325
Closed-end fund | Equity securities |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 21,421
Fair Value | 21,421
Amount Shown in Balance Sheet | 21,421
Limited partnership interests |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 383,717
Amount Shown in Balance Sheet | 383,717
Short-term Investments |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 172,667
Amount Shown in Balance Sheet | 172,667
Policy loans |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 153,541
Amount Shown in Balance Sheet | 153,541
Derivatives |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 8,657
Fair Value | 13,239
Amount Shown in Balance Sheet | 13,239
Mortgage loans |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 9,771
Amount Shown in Balance Sheet | 9,771
Other |
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] |
Cost | 12,758
Amount Shown in Balance Sheet | $ 12,758

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