Leases (Future Operating Lease Payments) (Details) - USD ($) $ in Thousands	Apr. 30, 2020	Jul. 31, 2019
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2020 (remaining of fiscal year)	$ 4,072
2021	16,346
2022	15,038
2023	13,515
2024	13,138
Thereafter	73,444
Total future lease payments	135,553
Less imputed interest	(26,521)
Total lease liability balance	$ 109,032
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2020		$ 10,707
2021		15,571
2022		14,450
2023		13,344
2024		13,174
Thereafter		78,508
Total future lease payments		$ 145,754

Amount of lessee's undiscounted obligation for lease payments for operating lease.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
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Amount of lessee's undiscounted obligation for lease payments for operating lease, due after fifth fiscal year following latest fiscal year.

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Amount of lessee's undiscounted obligation for lease payments for operating lease, due in fourth fiscal year following latest fiscal year.

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Amount of lessee's undiscounted obligation for lease payments for operating lease, due in third fiscal year following latest fiscal year.

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Amount of lessee's undiscounted obligation for lease payments for operating lease, due in second fiscal year following latest fiscal year.

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Amount of lessee's undiscounted obligation for lease payments for operating lease having an initial or remaining lease term in excess of one year due in remainder of fiscal year following latest fiscal year.

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-SubTopic 20
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Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating lease.

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Present value of lessee's discounted obligation for lease payments from operating lease.

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Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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