Interest - Schedule of Capitalized Interest (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Real Estate Inventory, Capitalized Interest Costs [Roll Forward]
Capitalized interest in inventory, beginning of period	$ 123,457	$ 87,619
Interest incurred	30,088	30,283
Interest expense not qualified for capitalization and included as other expense (a)	(7,432)	(9,747)
Capitalized interest amortized to house construction and land sales expenses (b)	(13,651)	(8,287)
Capitalized interest in inventory, end of period	$ 132,462	$ 99,868