Segment Information - Results of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May 31, 2020	May 31, 2019	May 31, 2020	May 31, 2019	Aug. 31, 2019
Revenue	$ 374,083	$ 364,533	$ 1,110,521	$ 1,071,068
Operating income	121,640	117,240	341,083	326,467
Capital expenditures	11,010	11,424	62,909	32,906
Assets	1,947,705		1,947,705		$ 1,560,130
Americas
Revenue	230,992	226,961	695,053	672,479
Operating income	54,019	51,012	144,952	140,549
Capital expenditures	8,160	8,664	47,234	20,022
Assets	1,106,646		1,106,646		851,014
EMEA
Revenue	105,420	102,499	308,355	299,197
Operating income	43,638	44,793	127,520	127,130
Capital expenditures	520	439	2,037	2,136
Assets	633,398		633,398		588,911
Asia Pacific
Revenue	37,671	35,073	107,113	99,392
Operating income	23,983	21,435	68,611	58,788
Capital expenditures	2,330	$ 2,321	13,638	$ 10,748
Assets	$ 207,661		$ 207,661		$ 120,205