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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 | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Income Tax Disclosure [Abstract] |  |  |  |
Expected tax provision at weighted average tax rate | $ 2,459 | $ (2,686) | $ 3,103 | $ (6,505)
Adjustments: |  |  |  |
Dividend exclusion | (21) | (24) | (38) | (46)
Parent (income) loss treated as partnership for tax | (146) | 1,827 | (342) | 2,070
Other | 79 | 257 | 221 | 442
Total deferred income tax expense (benefit) | $ 2,371 | $ (626) | $ 2,944 | $ (4,039)
Expected tax provision at weighted average | 21.00% | 21.00% | 21.00% | 21.00%
Adjustments: |  |  |  |
Dividend exclusion, % of Pre-Tax Income | (0.20%) | 0.20% | (0.30%) | 0.10%
Parent (income) loss treated as partnership for tax, % of Pre-Tax Income | (1.20%) | (14.30%) | (2.30%) | (6.70%)
Other, % of Pre-Tax Income | 0.70% | (2.00%) | 1.50% | (1.40%)
Effective income tax expense (benefit) | 20.30% | 4.90% | 19.90% | 13.00%

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