LEASES (Narrative) (Details) - USD ($)		3 Months Ended	12 Months Ended
		Nov. 30, 2019	Aug. 31, 2019	Aug. 31, 2020	Aug. 31, 2018	Aug. 31, 2017
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets, net				$ 119,533,000
Lease liability	[1],[2]			132,775,000
Long-term portion of deferred rent			$ 11,198,000
Deferred rent accruals		$ 300,000	11,500,000
Cumulative-effect adjustment			798,279,000	832,732,000	$ 758,638,000	$ 708,767,000
Cumulative Effect Of Accounting Changes [Member]
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets, net			120,600,000
Lease liability			132,100,000
Cumulative-effect adjustment				0
Retained Earnings [Member]
Lessee, Lease, Description [Line Items]
Cumulative-effect adjustment			$ 525,804,000	$ 582,487,000	473,954,000	$ 420,499,000
Retained Earnings [Member] | Cumulative Effect Of Accounting Changes [Member]
Lessee, Lease, Description [Line Items]
Cumulative-effect adjustment					$ 367,000
Minimum [Member]
Lessee, Lease, Description [Line Items]
Lease term				2 years
Maximum [Member]
Lessee, Lease, Description [Line Items]
Lease term				30 years

[1] Future minimum lease payments include $0.6 million of lease payment obligations for the prior leased Miami distribution center. For the purposes of calculating the minimum lease payments, a reduction is reflected for the actual sub-lease income the Company expects to receive during the remaining lease term. This sub-lease income was also considered, for the purposes of calculating the exit obligation, which was immaterial as of August 31, 2020.

[2] Operating lease obligations have been reduced by approximately $0.9 million to reflect expected sub-lease income. Certain obligations under leasing arrangements are collateralized by the underlying asset being leased.