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Schedule of Investment Income (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2023 | Mar. 31, 2022
Schedule Of Available For Sale Securities [Line Items] |  |
Investment income | $ 12,380 | $ 7,196
Investment expense | (372) | (604)
Net investment income | 12,008 | 6,592
Fixed Income Securities |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Investment income | 11,460 | 6,404
Equity Securities |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Investment income | 190 | 334
Cash and Cash Equivalents |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Investment income | 263 | 32
Other Invested Assets |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Investment income | $ 467 | $ 426

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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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