Notes Payable - Schedule of Future Minimum Payments under Unsecured Revolving Lines of Credit 2.35% Senior Notes, 2.57% Senior Notes and 6.25% Senior Notes (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Notes payable	$ 763,000	$ 413,775
Notes Payable to Banks and Others [Member]
Debt Instrument [Line Items]
2026	60,000
2027	588,000
2028	40,000
Thereafter	75,000
Notes payable	$ 763,000