v3.26.1
Fair Values of Financial Instruments - Summary of Carrying Amounts and Corresponding Fair Values for Financial Instruments (Detail) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fixed maturity securities, fair value $ 327,158 $ 344,576
Fixed maturity securities-available-for-sale, at fair value 285,249 313,038
Equity securities 63,952 57,493
Short-term investments 23,272 14,237
Carrying Amount [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fixed maturity securities, fair value 332,714 350,087
Fixed maturity securities-available-for-sale, at fair value 285,249 313,038
Equity securities 63,952 57,493
Short-term investments 23,272 14,237
Cash and cash equivalents 65,476 61,926
Fair Value [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fixed maturity securities, fair value 327,158 344,576
Fixed maturity securities-available-for-sale, at fair value 285,249 313,038
Equity securities 63,952 57,493
Short-term investments 23,272 14,237
Cash and cash equivalents $ 65,476 $ 61,926