Selected Quarterly Financial Data (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Quarterly Financial Information Disclosure [Abstract]
Total revenue					$ 370,931	$ 254,555	$ 191,643	$ 188,548	$ 1,287,577	$ 1,005,677	$ 742,405
Gross Profit	80,046	54,115	43,885	36,084	41,398	21,231	20,190	22,269	214,130	105,088	48,095
Operating Income (Loss)	22,079	8,472	311	(3,601)	(6,510)	(21,155)	(17,694)	(16,699)	27,261	(62,058)	(132,245)
Income (Loss) from Continuing Operations Attributable to Parent	11,328	(5,442)	(19,111)	(18,939)	(60,399)	(38,056)	(37,866)	698	(32,164)	(135,623)	(200,184)
Income (Loss) from Continuing Operations, Per Basic Share	$ 0.46	$ (0.22)	$ (0.78)	$ (0.78)	$ (2.57)	$ (1.92)	$ (2.41)	$ 0.05
Income (Loss) from Continuing Operations, Per Diluted Share	$ 0.36	$ (0.22)	$ (0.78)	$ (0.78)	$ (2.57)	$ (1.92)	$ (2.41)	$ 0.04
Gains (Losses) on Extinguishment of Debt	(998)	0	(3,638)	0	(42,350)	0	(2,747)	0	(4,636)	(45,097)	(2,909)
Inventory impairments and lot option abandonments	$ 404	$ 0	$ 2,025	$ 204	$ 1,718	$ 5,819	$ 1,170	$ 3,503	$ 2,633	$ 12,210	$ 32,459