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Leases (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jan. 31, 2020 | Jan. 31, 2020 | Aug. 01, 2019 | Jul. 31, 2019
Operating Lease Expense [Line Items] |  |  |  |
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability |  | $ 10,637 |  |
Operating Lease, Weighted Average Remaining Lease Term | 3 years 10 months 24 days | 3 years 10 months 24 days |  |
Operating Lease, Weighted Average Discount Rate, Percent | 3.40% | 3.40% |  |
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months | $ 8,426 | $ 8,426 |  | $ 18,450
Lessee, Operating Lease, Liability, Payments, Due Year Two | 15,780 | 15,780 |  | 16,132
Lessee, Operating Lease, Liability, Payments, Due Year Three | 12,797 | 12,797 |  | 13,439
Lessee, Operating Lease, Liability, Payments, Due Year Four | 9,427 | 9,427 |  | 10,065
Lessee, Operating Lease, Liability, Payments, Due Year Five | 5,580 | 5,580 |  | 5,656
Lessee, Operating Lease, Liability, Payments, Due after Year Five | 3,268 | 3,268 |  | 3,502
Lessee, Operating Lease, Liability, Payments, Due | 55,278 | 55,278 |  | $ 67,244
Lessee, Operating Lease, Liability, Undiscounted Excess Amount | (3,384) | (3,384) |  |
Operating Lease, Liability | 51,894 | 51,894 | $ 58,544 |
Operating Lease, Payments |  | 8,216 |  |
Cost of Sales [Member] |  |  |  |
Operating Lease Expense [Line Items] |  |  |  |
Operating Lease, Cost | 2,092 | 4,962 |  |
Selling, General and Administrative Expenses [Member] |  |  |  |
Operating Lease Expense [Line Items] |  |  |  |
Operating Lease, Cost | $ 2,182 | $ 4,716 |  |

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- Definition Amount of lessee's undiscounted obligation for lease payments for operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918701-209980 + Details
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