Summary of Significant Accounting Policies - Schedule of Other Liabilities (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011
Accounting Policies [Abstract]
Reverse stock split ratio	one-for-five
Other Liabilities [Abstract]
Income tax liabilities	$ 21,834		$ 22,225
Accrued warranty expenses	13,601	14,342	15,477	16,133	17,414	17,916
Accrued interest	33,483		28,673
Accrued and deferred compensation	17,579		24,612
Customer deposits	12,498		8,830
Other	41,807		47,901
Total	$ 140,802		$ 147,718