Interest - Schedule of Capitalized Interest (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Real Estate Inventory, Capitalized Interest Costs [Roll Forward]
Capitalized interest in inventory, beginning of period	$ 61,836	$ 41,922	$ 52,562	$ 38,190
Interest incurred	32,458	29,177	64,899	57,595
Interest expense not qualified for capitalization and included as other expense	(14,659)	(16,246)	(30,691)	(32,457)
Capitalized interest amortized to house construction and land sales expenses	(7,379)	(9,352)	(14,514)	(17,827)
Capitalized interest in inventory, end of period	$ 72,256	$ 45,501	$ 72,256	$ 45,501