Debt - Schedule of Long Term Debt (Details) - USD ($) $ in Thousands	Jul. 31, 2021	Jul. 31, 2020
Debt Instrument [Line Items]
Debt issuance costs	$ (563)	$ (1,025)
Current maturities of long-term debt	(11,324)	(13,430)
Long-term debt	114,625	125,844
Long-Term Debt, Excluding Lines Of Credit
Debt Instrument [Line Items]
Long-term debt, gross	126,512	140,299
First Lien Loan Agreement \| Term Loan
Debt Instrument [Line Items]
Long-term debt, gross	117,637	125,158
First Lien Loan Agreement \| Capital expenditure loan
Debt Instrument [Line Items]
Long-term debt, gross	8,875	15,141
Revolving Credit Facility \| First Lien Loan Agreement \| Line of Credit
Debt Instrument [Line Items]
Long-term debt, gross	124,000	243,500
Debt issuance costs	(2,652)	(3,826)
Long-term debt	$ 121,348	$ 239,674

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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