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Differences in Tax Provision for Financial Statement Purposes and Expected Tax Provision at Weighted Average Tax Rate (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022
Income Tax Disclosure [Abstract] |  |
Expected tax provision at weighted average tax rate | $ 644 | $ (3,819)
Adjustments: |  |
Dividend exclusion | (17) | (22)
Change in tax status | 0 | 0
Parent income treated as partnership for tax | (196) | 243
Other | 142 | 185
Total income tax expense (benefit) | $ 573 | $ (3,413)
Expected tax provision at weighted average | 21.00% | 21.00%
Adjustments: |  |
Dividend exclusion, % of Pre-Tax Income | (0.50%) | 0.10%
Change in tax status, % of Pre-Tax Income | 0.00% | 0.00%
Parent (income) loss treated as partnership for tax, % of Pre-Tax Income | (6.40%) | (1.30%)
Other, % of Pre-Tax Income | 4.60% | (1.00%)
Effective income tax expense (benefit) | 18.70% | 18.80%

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