Interest (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Real Estate Inventory, Capitalized Interest Costs [Roll Forward]
Capitalized interest in inventory, beginning of period	$ 119,596	$ 113,143	$ 112,580	$ 109,088
Interest incurred	19,689	18,034	37,895	35,864
Capitalized interest amortized to home construction and land sales expenses	(16,071)	(17,291)	(27,261)	(31,066)
Capitalized interest in inventory, end of period	$ 123,214	$ 113,886	$ 123,214	$ 113,886