Other Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
Other Liabilities [Abstract]
Accrued bonus and deferred compensation	$ 36,237	$ 41,508
Accrued warranty expenses	13,388	15,331	$ 18,091	$ 39,131
Accrued Interest	12,767	14,401
Customer Deposits	11,539	14,903
Litigation accrual	3,420	3,656
Income tax liabilities	648	710
Other	31,430	35,880
Total	$ 109,429	$ 126,389