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Investments - Investment (Loss) Income Summarized (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Schedule Of Investments [Line Items] |  |  |  |
Recognized investment income (loss) | $ 689 | $ 476 | $ (2,058) | $ 1,308
Real estate investments | (34) | (28) | (299) | 173
Net investment income | 1,832 | 3,621 | 3,244 | 11,125
Available-for-Sale-Fixed-Maturity Securities [Member] |  |  |  |
Schedule Of Investments [Line Items] |  |  |  |
Investment income | 771 | 1,637 | 3,529 | 4,794
Equity Securities [Member] |  |  |  |
Schedule Of Investments [Line Items] |  |  |  |
Investment income | 336 | 305 | 970 | 979
Limited Partnership Investment [Member] |  |  |  |
Schedule Of Investments [Line Items] |  |  |  |
Recognized investment income (loss) | 689 | 476 | (2,058) | 1,308
Cash and Cash Equivalents [Member] |  |  |  |
Schedule Of Investments [Line Items] |  |  |  |
Investment income | 212 | 1,354 | 1,513 | 3,908
Short-term Investments [Member] |  |  |  |
Schedule Of Investments [Line Items] |  |  |  |
Investment income | 1 | 8 | 2 | 383
Investment Expense [Member] |  |  |  |
Schedule Of Investments [Line Items] |  |  |  |
Investment expense | (125) | (114) | (367) | (349)
Loss Income From Unconsolidated Joint Venture [Member] |  |  |  |
Schedule Of Investments [Line Items] |  |  |  |
Investment income | $ (18) | $ (17) | $ (46) | $ (71)

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- Definition Amount, after investment expense, of income earned or loss incurred 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 No definition available. + Details
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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 http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
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