Schedule of Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2020	Aug. 31, 2019	Aug. 31, 2018
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Reversal of valuation allowance		$ 17,500
Allowance for uncollectible accounts receivable
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 17,221	15,181	$ 14,134
Additions and Adjustments Charged to Costs and Expenses	24,574	15,867	12,545
Additions/ (Reductions) Charged to Other Accounts	0	0	0
Write-offs/Reductions Charged to Costs and Expenses	(15,968)	(13,827)	(11,498)
Balance at End of Period	25,827	17,221	15,181
Reserve for excess and obsolete inventory
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	69,553	60,940	46,013
Additions and Adjustments Charged to Costs and Expenses	60,084	34,091	35,538
Additions/ (Reductions) Charged to Other Accounts	0	0	0
Write-offs/Reductions Charged to Costs and Expenses	(44,378)	(25,478)	(20,611)
Balance at End of Period	85,259	69,553	60,940
Valuation allowance for deferred taxes
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	287,604	223,487	285,559
Additions and Adjustments Charged to Costs and Expenses	54,249	22,750	18,418
Additions/ (Reductions) Charged to Other Accounts	9,664	58,117	(886)
Write-offs/Reductions Charged to Costs and Expenses	(10,317)	(16,750)	(79,604)
Balance at End of Period	$ 341,200	$ 287,604	$ 223,487