v3.25.2
Debt - Debt (Parenthetical) (Detail) - USD ($)
Jun. 30, 2025
Dec. 31, 2024
Debt Instrument [Line Items]    
Unamortized debt issuance cost $ 333,000 $ 404,000
Unsecured private placement 3.95% note [Member]    
Debt Instrument [Line Items]    
Unamortized debt issuance cost 78,000 99,000
Unsecured private placement 3.86% note [Member]    
Debt Instrument [Line Items]    
Unamortized debt issuance cost 0 15,000
Unsecured private placement 2.30% note [Member]    
Debt Instrument [Line Items]    
Unamortized debt issuance cost 66,000 77,000
Unsecured private placement 2.37% note [Member]    
Debt Instrument [Line Items]    
Unamortized debt issuance cost 71,000 83,000
Unsecured private placement 2.73% note [Member]    
Debt Instrument [Line Items]    
Unamortized debt issuance cost 62,000 70,000
Unsecured private placement 2.83% note [Member]    
Debt Instrument [Line Items]    
Unamortized debt issuance cost 56,000 60,000
Unsecured private placement 6.17% note [Member]    
Debt Instrument [Line Items]    
Unamortized debt issuance cost $ 0 $ 0