Real Estate and Other Activities - Net Assets Acquired (Detail) - USD ($) $ in Thousands	Sep. 30, 2026	Sep. 30, 2025
Business Combination [Line Items]
Total net assets acquired	$ 194,822	$ 110,089
Land and Land Improvements [Member]
Business Combination [Line Items]
Assets acquired	25,028	23,375
Buildings and Other [Member]
Business Combination [Line Items]
Assets acquired	148,095	23,699
Intangible Lease Assets [Member]
Business Combination [Line Items]
Assets acquired	21,699	0
Investments in Unconsolidated Real Estate Joint Ventures [Member]
Business Combination [Line Items]
Assets acquired	$ 0	$ 63,015