Schedule II Valuation of Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2019
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balances at beginning of period	$ 7,157	$ 5,005	$ 4,471
Additions — Due to acquired businesses	388	0	0
Additions — Charged to expense	803	2,495	587
Deductions - written off	(1,042)	(343)	(53)
Balances at end of period	7,306	7,157	5,005
SEC Schedule, 12-09, Reserve, Inventory [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balances at beginning of period	16,309	13,404	12,582
Additions — Due to acquired businesses	2,957	0	0
Additions — Charged to expense	4,908	5,722	3,168
Deductions - written off	(1,165)	(2,817)	(2,346)
Balances at end of period	23,009	16,309	13,404
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balances at beginning of period	58,809	60,073	56,866
Additions — Due to acquired businesses	1,351	0	0
Additions — Charged to expense	4,168	6,204	5,981
Deductions - written off	(13,259)	(7,468)	(2,774)
Balances at end of period	$ 51,069	$ 58,809	$ 60,073