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Schedule of Investment Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Schedule Of Available For Sale Securities [Line Items]
Investment income	$ 29,776	$ 39,662	$ 31,487
Investment expense	(2,149)	(2,642)	(3,095)
Net investment income	27,627	37,020	28,392
Fixed Income Securities
Schedule Of Available For Sale Securities [Line Items]
Investment income	33,852	25,751	31,987
Equity Securities
Schedule Of Available For Sale Securities [Line Items]
Investment income	1,100	2,692	4,944
Cash and Cash Equivalents
Schedule Of Available For Sale Securities [Line Items]
Investment income	790	363	784
Other Invested Assets
Schedule Of Available For Sale Securities [Line Items]
Investment income	$ (5,966)	$ 10,856	$ (6,228)

X

- Definition

Amount before accretion (amortization) of purchase discount (premium) of interest income and dividend income on nonoperating securities.

+ References

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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.

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