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Investments - Net Investment Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Components of net investment income |  |  |  |
Gross investment income | $ 34,820 | $ 23,031 | $ 92,377 | $ 69,195
Investment expenses | (2,226) | (1,458) | (5,764) | (4,091)
Net investment income | 32,594 | 21,573 | 86,613 | 65,104
Fixed maturities |  |  |  |
Components of net investment income |  |  |  |
Gross investment income | 33,948 | 23,001 | 91,245 | 69,037
Short-term investments |  |  |  |
Components of net investment income |  |  |  |
Gross investment income | $ 872 | $ 30 | $ 1,132 | $ 158

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- Definition Amount, before investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.2) -URI https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
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- Definition Amount, after investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(2)) -URI https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
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