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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 | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Income Tax Disclosure [Abstract] |  |  |
Expected tax provision at weighted average | $ 414 | $ 6,889 | $ (7,975)
Adjustments: |  |  |
Tax exempt interest | 0 | 0 | (2)
Dividend exclusion | (89) | (78) | (202)
Non-deductible interest | 0 | 0 | 1,773
Change in tax status | 700 | 0 | (1,704)
Parent income treated as partnership for tax | 2,156 | (4,057) | (533)
Other | (360) | 695 | 538
Total income tax expense (benefit) | $ 2,821 | $ 3,449 | $ (8,105)
Expected tax provision at weighted average | 21.00% | 21.00% | 27.40%
Adjustments: |  |  |
Tax exempt interest, % of Pre-Tax Income | 0.00% | 0.00% | 0.00%
Dividend exclusion, % of Pre-Tax Income | (4.50%) | (0.20%) | 0.70%
Non-deductible interest, % of Pre-Tax Income | 0.00% | 0.00% | (6.10%)
Change in tax status, % of Pre-Tax Income | 35.50% | 0.00% | 5.80%
Parent income treated as partnership for tax, % of Pre-Tax Income | 109.40% | (12.40%) | 1.80%
Other, % of Pre-Tax Income | (18.30%) | 2.10% | (1.80%)
Effective income tax expense (benefit) | 143.10% | 10.50% | 27.80%

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