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Retirement and Profit Sharing Plans (Details) $ in Millions | 12 Months Ended
--- | ---
Jul. 31, 2019 USD ($) hour | Jul. 31, 2018 USD ($) | Jul. 31, 2017 USD ($)
Retirement Benefits [Abstract] |  |  |
Employee contribution percentage | 100.00% |  |
Company match amount equal to participant's contribution | 50.00% |  |
Employer contribution matching equal to 50% | 6.00% |  |
Employment period (in months) | 12 months |  |
Service period (in hours) | 1,000 |  |
Total service period (in hours) | 1,500 |  |
Retirement plan expense | $ | $ 7.9 | $ 6.9 | $ 5.4

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- Definition Defined Contribution Plan, Maximum Employee Contribution Percentage + References No definition available. + Details
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- Definition Defined Contribution Plan, Maximum Employer Contribution Percentage + References No definition available. + Details
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Data Type: | num:percentItemType
Balance Type: | na
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- Definition Requisite Employment Period in Months to be eligible for the Company's matching contributions if 1,000 service hours are worked. + References No definition available. + Details
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- Definition Requisite Employment Period in Hours within a consecutive 12 month period to be eligible for the Company's matching contributions. + References No definition available. + Details
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- Definition Requisite Employment Period in Hours to be eligible for the Company's matching contributions. + References No definition available. + Details
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- References No definition available. + Details
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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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Balance Type: | debit
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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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