v3.26.1
Fair Values of Financial Instruments - Summary of Carrying Amounts and Corresponding Fair Values for Financial Instruments (Detail) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fixed maturity securities, fair value $ 332,659 $ 344,576
Fixed maturity securities-available-for-sale, at fair value 314,211 313,038
Equity securities 55,840 57,493
Short-term investments 28,753 14,237
Carrying Amount [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fixed maturity securities, fair value 340,546 350,087
Fixed maturity securities-available-for-sale, at fair value 314,211 313,038
Equity securities 55,840 57,493
Short-term investments 28,753 14,237
Cash and cash equivalents 34,226 61,926
Fair Value [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fixed maturity securities, fair value 332,659 344,576
Fixed maturity securities-available-for-sale, at fair value 314,211 313,038
Equity securities 55,840 57,493
Short-term investments 28,753 14,237
Cash and cash equivalents $ 34,226 $ 61,926