Interest (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Real Estate Inventory, Capitalized Interest Costs [Roll Forward]
Capitalized interest in inventory, beginning of period	$ 109,088	$ 106,985	$ 119,659
Interest incurred	71,981	74,161	77,397
Capitalized interest impaired	0	(439)	0
Interest expense not qualified for capitalization and included as other expense	0	0	(2,781)
Capitalized interest amortized to home construction and land sales expenses	(68,489)	(71,619)	(87,290)
Capitalized interest in inventory, end of period	$ 112,580	$ 109,088	$ 106,985