Restructuring and Related Charges - Restructuring and Related Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Nov. 30, 2018	Nov. 30, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	$ 6,025	$ 11,388
Employee severance and benefit costs
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	5,179	3,977
Lease costs
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	9	0
Asset write-off costs
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	184	6,812
Other related costs
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	653	599
EMS
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	4,400	5,900
DMS
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	1,600	4,600
Non-allocated charges
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	$ 0	$ 900