Inventory - Schedule of Inventory Impairments and Abandonment Charges, by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2026	Mar. 31, 2025
Real Estate Properties [Line Items]
Total impairment charges on projects in progress	$ 1,295	$ 0	$ 1,295	$ 0
Total impairment charges on land held for sale	0	0	1,045	0
Total abandonments charges	0	528	1,325	528
Total impairment and abandonment charges	1,295	528	3,665	528
Corporate and unallocated
Real Estate Properties [Line Items]
Total impairment charges on projects in progress	121	0	121	0
Total impairment charges on land held for sale	0	0	122	0
West | Operating Segments
Real Estate Properties [Line Items]
Total impairment charges on projects in progress	1,174	0	1,174	0
Total impairment charges on land held for sale	0	0	45	0
Total abandonments charges	0	528	1,304	528
East | Operating Segments
Real Estate Properties [Line Items]
Total impairment charges on land held for sale	0	0	878	0
Total abandonments charges	$ 0	$ 0	$ 21	$ 0