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Leases Supplemental Cash Flow Disclosures (Details) - USD ($) $ in Thousands	6 Months Ended
	Jan. 31, 2021	Jan. 31, 2020
Lessee, Lease, Description [Line Items]
Operating cash flows related to operating leases	$ 14,597	$ 14,797
Operating cash flows related to finance leases	17	14
Financing cash flows related to finance leases	622	0
Right-of-use assets obtained in exchange for new operating lease liabilities	12,812	13,601
Right-of-use assets obtained in exchange for new finance lease liabilities	$ 6,251	0
Technology Equipment
Lessee, Lease, Description [Line Items]
Financing cash flows related to finance leases		$ 312

X

- Definition

Amount of interest paid on finance lease liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (g)(1)
-URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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-Section 45
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X

- Definition

Amount of cash outflow for principal payment on finance lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
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-URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918643-209977

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-URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980

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+ References

No definition available.

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X

- Definition

Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 5
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918643-209977

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-Publisher FASB
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Amount of increase in right-of-use asset obtained in exchange for finance lease liability.

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Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

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