Schedule of Investment Income (Detail) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Schedule Of Available For Sale Securities [Line Items] | ||||
| Investment income | $ 16,911 | $ 15,220 | $ 29,678 | $ 30,493 |
| Investment expense | (550) | (513) | (1,099) | (1,004) |
| Net investment income | 16,361 | 14,707 | 28,579 | 29,489 |
| Fixed Income Securities | ||||
| Schedule Of Available For Sale Securities [Line Items] | ||||
| Investment income | 13,620 | 14,909 | 27,386 | 29,296 |
| Equity Securities | ||||
| Schedule Of Available For Sale Securities [Line Items] | ||||
| Investment income | 602 | 169 | 1,189 | 285 |
| Cash and Cash Equivalents | ||||
| Schedule Of Available For Sale Securities [Line Items] | ||||
| Investment income | 445 | 750 | 821 | 1,606 |
| Other Invested Assets | ||||
| Schedule Of Available For Sale Securities [Line Items] | ||||
| Investment income | $ 2,244 | $ (608) | $ 282 | $ (694) |
| X | ||||||||||
- Definition Amount before accretion (amortization) of purchase discount (premium) of interest income and dividend income on nonoperating securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of expenses related to the generation of investment income. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Aggregate amount of net income allocated to limited partners. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition 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. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|