Income Taxes -Schedule (Details)	3 Months Ended
	Nov. 30, 2017	Nov. 30, 2016
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Federal statutory rate	35.00%	35.00%
State taxes, net of credits	0.10%	2.10%
Foreign income taxed at different rates	(1.20%)	(3.40%)
Valuation allowance on deferred tax assets	(6.80%)	(25.00%)
Unrecognized tax benefits	0.60%	1.90%
Non-deductible officers’ compensation	1.50%	2.70%
Research and development credits	(0.50%)	(1.40%)
Section 199 deduction	(1.90%)	(0.00%)
Other non-deductible expenses	0.00%	1.30%
Other	(1.30%)	(0.20%)
Noncontrolling interests	(1.90%)	(4.40%)
Effective tax rate	23.60%	8.60%