Inventory - Narrative (Details) (USD $)			3 Months Ended
	Dec. 31, 2013 home	Sep. 30, 2013 home	Dec. 31, 2012 Minimum [Member]	Dec. 31, 2012 Maximum
Real Estate Properties [Line Items]
Number of substantially completed homes	133	113
Total value of substantially completed homes	$ 33,400,000	$ 30,700,000
Discount rate			10.90%	13.00%
Deposits and non-refundable preacquisition costs incurred	44,301,000	37,313,000
Total remaining purchase price committed under all options	$ 362,044,000	$ 288,638,000