Other Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Other Liabilities [Abstract]
Accrued warranty expenses	$ 39,131	$ 27,681	$ 16,084	$ 11,663
Accrued bonus and deferred compensation	30,466	25,076
Customer deposits	12,140	13,757
Accrued interest	11,530	31,632
Litigation accrual	10,178	12,607
Income tax liabilities	1,718	1,998
Other	29,090	36,215
Total	$ 134,253	$ 148,966