Other Current Liabilities (Schedule Of Other Liabilities Current) (Details) - USD ($) $ in Thousands	May 31, 2018	Aug. 31, 2017	May 31, 2017
Other Liabilities Disclosure [Abstract]
Compensation and benefits	$ 17,258	$ 18,926	$ 18,832
Deferred revenues	9,701	6,166	8,854
Warranties	7,135	8,411	7,595
Tax related liabilities	5,174	2,813	3,330
Dealer related liabilities	3,237	3,500	5,112
Customer deposits	1,767	4,096	5,392
Accrued environmental liabilities	1,281	2,095	2,134
Other	8,358	9,112	11,252
Total other current liabilities	$ 53,911	$ 55,119	$ 62,501