Debt - Debt (Parenthetical) (Detail) - USD ($)	Mar. 31, 2026	Dec. 31, 2025
Debt Instrument [Line Items]
Unamortized debt issuance cost	$ 246,000	$ 275,000
Unsecured private placement 3.95% note [Member]
Debt Instrument [Line Items]
Unamortized debt issuance cost	45,000	56,000
Unsecured private placement 2.30% note [Member]
Debt Instrument [Line Items]
Unamortized debt issuance cost	49,000	55,000
Unsecured private placement 2.37% note [Member]
Debt Instrument [Line Items]
Unamortized debt issuance cost	54,000	60,000
Unsecured private placement 2.73% note [Member]
Debt Instrument [Line Items]
Unamortized debt issuance cost	48,000	52,000
Unsecured private placement 2.83% note [Member]
Debt Instrument [Line Items]
Unamortized debt issuance cost	50,000	52,000
Unsecured private placement 6.17% note [Member]
Debt Instrument [Line Items]
Unamortized debt issuance cost	$ 0	$ 0

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details