Interest - Schedule of Capitalized Interest (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Real Estate Inventory, Capitalized Interest Costs [Roll Forward]
Capitalized interest in inventory, beginning of period	$ 113,143	$ 110,516	$ 109,088	$ 106,985
Interest incurred	18,034	18,253	35,864	36,564
Interest expense not qualified for capitalization and included as other expense	0	0	0	0
Capitalized interest amortized to home construction and land sales expenses	(17,291)	(16,083)	(31,066)	(30,863)
Capitalized interest in inventory, end of period	$ 113,886	$ 112,686	$ 113,886	$ 112,686