Other Liabilities Other Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Mar. 31, 2016	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Sep. 30, 2014
Other Liabilities Disclosure [Abstract]
Accrued warranty expense	$ 40,590	$ 40,903	$ 27,681	$ 30,824	$ 28,794	$ 16,084
Accrued interest	19,835		31,632
Accrued bonuses and deferred comp	19,364		25,076
Customer deposits	14,384		13,757
Litigation accrual	9,083		12,607
Income tax liabilities	2,264		1,998
Other	32,799		36,215
Total Other Liabilities	$ 138,319		$ 148,966