v3.26.1
Fair Value Measurement - Additional Information (Detail)
6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Schedule Of Available For Sale Securities [Line Items]    
Average contractual maturity period 20 years 20 years
Investment, Type [Extensible Enumeration] Collateralized Mortgage-Backed Securities [Member] Collateralized Mortgage-Backed Securities [Member]