Other Liabilities Other Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015
Other Liabilities Disclosure [Abstract]
Accrued warranty expense	$ 32,309	$ 39,131	$ 28,913	$ 27,681
Accrued interest	25,089	11,530
Accrued bonuses and deferred comp	14,464	30,466
Customer deposits	13,273	12,140
Litigation accrual	9,187	10,178
Income tax liabilities	1,772	1,718
Other	25,617	29,090
Total other liabilities	$ 121,711	$ 134,253