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Schedule I - Summary of Investments-Other Than Investments in Related Parties | 12 Months Ended
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Dec. 31, 2023
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Abstract] |
Schedule I - Summary of Investments-Other Than Investments in Related Parties | Schedule I—Summary of Investments—Other Than Investments in Related Parties December 31, 2023
Type of Investment (In thousands) |  | Amortized Cost |  | Fair Value |  | Amount at which shown in the Balance Sheet
Fixed maturities: |  |  |  |  |  |
Bonds: |  |  |  |  |  |
United States Government and government agencies and authorities |  | $ | 1,459,742 |  |  | $ | 1,340,313 |  |  | $ | 1,340,313 |
States, municipalities and political subdivisions |  | 585,047 |  |  | 547,258 |  |  | 547,258 |
Residential and commercial mortgage securities |  | 571,163 |  |  | 517,940 |  |  | 517,940 |
Asset-backed securities |  | 584,168 |  |  | 564,995 |  |  | 564,995 |
Foreign government and agency securities |  | 77,516 |  |  | 67,447 |  |  | 67,447 |
All other corporate bonds |  | 1,380,533 |  |  | 1,297,055 |  |  | 1,297,055 |
Total fixed maturities |  | 4,658,169 |  |  | 4,335,008 |  |  | 4,335,008 |
Short-term investments |  | 928,561 |  |  | 928,731 |  |  | 928,731 |
Other invested assets |  | 277,228 |  |  | 277,226 |  |  | 277,226 |
Total investments |  | $ | 5,863,958 |  |  | $ | 5,540,965 |  |  | $ | 5,540,965 |

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- Definition The entire disclosure of information about investment held by insurance company, excluding investment in related party. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 15 -Publisher SEC Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 320 -Name Accounting Standards Codification -Section S99 -Paragraph 7 -Subparagraph (SX 210.12-15) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480032/946-320-S99-7 + Details
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