Income Taxes - Schedule of Deferred Tax Assets (Liabilities) (Details) - USD ($) $ in Thousands	Jul. 31, 2021	Jul. 31, 2020
Tax Credit Carryforward [Line Items]
Deferred Tax Assets, Gross	$ 52,916	$ 34,208
Deferred Tax Liabilities, Gross	64,778	43,649
Deferred Tax Liabilities, Other	5,282	4,715
Deferred Tax Assets, Tax Deferred Expense, Other	13,698	11,786
Deferred Tax Liability, Valuation Allowance	0	0
Deferred Tax Assets, Valuation Allowance	51,069	58,809
Deferred Tax Liabilities Tax Credit Carryforwards And Net Operating Losses	0	0
Deferred Tax Assets, Tax Credit Carryforwards	60,238	56,447
Deferred tax liabilities, deferred tax expense, postretirement benefits	166	31
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Postretirement Benefits	2,359	3,002
Deferred Tax Liability, Deferred Expense, Deferred Compensation	0	0
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost	8,069	7,851
Deferred Tax Liabilities, Intangible Assets	51,987	31,488
Deferred Tax Assets, Goodwill and Intangible Assets	996	1,026
Deferred Tax Liabilities, Property, Plant and Equipment	7,292	7,285
Deferred Tax Assets, Property, Plant and Equipment	3,479	3,663
Deferred Tax Liabilities Accounts Receivable	0	0
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts	1,433	1,518
Deferred Tax Liabilities Tax Deferred Expense Compensation And Benefits Employee Benefits	0	72
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Benefits	8,570	3,339
Deferred Tax Liabilities, Inventory	51	58
Deferred Tax Assets, Inventory	5,143	4,385
Net of liabilities [Member]
Tax Credit Carryforward [Line Items]
Deferred Tax Assets, Valuation Allowance	51,069
Deferred Tax Assets, Tax Credit Carryforwards	60,238
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Postretirement Benefits	2,193
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost	8,069
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts	1,433
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Benefits	8,570
Deferred Tax Assets, Inventory	5,092
Net of assets [Member]
Tax Credit Carryforward [Line Items]
Deferred Tax Liabilities, Net	11,862	9,441
Deferred Tax Assets, Tax Deferred Expense, Other	8,416
Deferred Tax Liabilities, Intangible Assets	50,991
Deferred Tax Liabilities, Property, Plant and Equipment	$ 3,813
Net of liabilities [Member]
Tax Credit Carryforward [Line Items]
Deferred Tax Assets, Valuation Allowance		58,809
Deferred Tax Assets, Tax Credit Carryforwards		56,447
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Postretirement Benefits		2,971
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost		7,851
Deferred Tax Liabilities, Intangible Assets		30,462
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts		1,518
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Benefits		3,267
Deferred Tax Assets, Inventory		4,327
Net of assets [Member]
Tax Credit Carryforward [Line Items]
Deferred Tax Assets, Tax Deferred Expense, Other		7,071
Deferred Tax Liabilities, Property, Plant and Equipment		$ 3,622