v3.25.1
Segment Information - Additional Information (Detail)
 3 Months Ended
Mar. 31, 2025
USD ($)
Segment
HoldingCompany
Mar. 31, 2024
USD ($)
Segment Reporting Information [Line Items]    
Revenues $ 108,651,000 $ 112,291,000
Number of reportable segments | Segment 3  
Number of holding companies in which reportable segments are structured | HoldingCompany 2  
Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration] srt:ChiefExecutiveOfficerMember  
Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description The Company analyzes the operating performance of each segment using the segment’s income (loss). Segment income (loss) does not equate to “net income (loss)” as determined in accordance with U.S. GAAP but is the measure of segment profit or loss used by the CODM to evaluate segment performance and allocate resources, and consistent with authoritative guidance, is the measure of segment performance presented below.  
Agency and Insurance Services [Member]    
Segment Reporting Information [Line Items]    
Expenses   $ 0