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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2022
Income Tax Disclosure [Abstract] |
Schedule of Components of Income Tax Expense | Income tax expense which is generated in the U.S. consists of the following components for the years ended December 31:
(In thousands) |  | 2022 |  | 2021 |  | 2020
Current |  | $ | 98,666 |  |  | $ | 56,509 |  |  | $ | 38,402 |
Deferred |  | 58,168 |  |  | 84,022 |  |  | 38,653 |
Total income tax expense |  | $ | 156,834 |  |  | $ | 140,531 |  |  | $ | 77,055 |
Schedule of Reconciliation of Difference between Income Tax Expense and Expected Tax Provision at Weighted Average Tax Rate | The reconciliation of the difference between income tax expense and the expected tax provision at the weighted average tax rate was as follows for the years ended December 31:
|  | 2022 |  | 2021 |  | 2020
($ in thousands) |  | $ |  | % of pretax income |  | $ |  | % of pretax income |  | $ |  | % of pretax income
Tax provision at weighted average statutory rates |  | $ | 148,176 |  |  | 15.0 | % |  | $ | 127,046 |  |  | 15.5 | % |  | $ | 75,763 |  |  | 15.5 | %
State taxes, net of federal benefit |  | 6,306 |  |  | 0.6 |  |  | 11,295 |  |  | 1.4 |  |  | — |  |  | 0.0 |
Non-deductible expenses |  | 4,041 |  |  | 0.4 |  |  | 3,652 |  |  | 0.4 |  |  | 2,482 |  |  | 0.5 |
Tax exempt interest, net of proration |  | (1,463) |  |  | (0.1) |  |  | (1,606) |  |  | (0.2) |  |  | (1,462) |  |  | (0.3) |
Excess tax (benefit) deficit from stock-based compensation |  | 75 |  |  | 0.0 |  |  | 61 |  |  | — |  |  | (599) |  |  | (0.1) |
Other |  | (301) |  |  | 0.0 |  |  | 83 |  |  | 0.0 |  |  | 871 |  |  | 0.1 |
Total income tax expense |  | $ | 156,834 |  |  | 15.9 | % |  | $ | 140,531 |  |  | 17.1 | % |  | $ | 77,055 |  |  | 15.7 | %
Schedule of Net Deferred Tax (Liability) Asset and Components | The net deferred tax liability was comprised of the following at December 31:
(In thousands) |  | 2022 |  | 2021
Deferred tax assets |  | $ | 91,729 |  |  | $ | 29,100 |
Deferred tax liabilities |  | (448,539) |  |  | (402,754) |
Net deferred tax liability |  | $ | (356,810) |  |  | $ | (373,654) |
The components of the net deferred tax liability were as follows at December 31:
(In thousands) |  | 2022 |  | 2021
Contingency reserves |  | $ | (432,265) |  |  | $ | (372,336) |
Unrealized (gain) loss on investments |  | 60,439 |  |  | (14,573) |
Unearned premium reserve |  | 14,099 |  |  | 12,539 |
Investments in limited partnerships |  | (13,907) |  |  | (13,002) |
Accrued expenses |  | 6,257 |  |  | 6,076 |
Unearned ceding commissions |  | 2,363 |  |  | 2,474 |
Change in fair market value of derivatives |  | 2,377 |  |  | 1,827 |
Deferred policy acquisition costs |  | (2,152) |  |  | (2,642) |
Nonvested shares |  | 1,640 |  |  | 1,841 |
Start-up expenditures, net |  | 1,233 |  |  | 880 |
Fixed assets |  | 1,197 |  |  | 836 |
Impairments on available-for-sale investment securities |  | 1,155 |  |  | — |
Loss reserves |  | 965 |  |  | 2,622 |
Prepaid expenses |  | (156) |  |  | (123) |
Loss reserves - TCJA transition adjustment |  | (59) |  |  | (78) |
Organizational expenditures |  | 4 |  |  | 5 |
Net deferred tax liability |  | $ | (356,810) |  |  | $ | (373,654) |

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32639-109319 + Details
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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319 + Details
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