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Leases - Narrative (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jul. 31, 2019 | Jul. 31, 2018 | Jul. 31, 2019 | Jul. 31, 2018
Lessee, Lease, Description [Line Items] |  |  |  |
Operating lease right-of-use assets | $ 294,824 |  | $ 294,824 |
Operating lease liabilities | 309,417 |  | 309,417 |
Operating lease, lease not yet commenced, payment | $ 33,000 |  | $ 33,000 |
Minimum |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |
Leases, remaining lease term, period (less than) (years) |  |  | 1 year |
Operating lease, lease not yet commenced, term (years) | 3 years |  | 3 years |
Maximum |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |
Leases, remaining lease term, period (less than) (years) |  |  | 10 years |
Operating lease, lease not yet commenced, term (years) | 6 years |  | 6 years |
Pleasanton, California | Chairman, Mr. Duffield |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |
Operating lease right-of-use assets | $ 53,000 |  | $ 53,000 |
Operating lease liabilities | $ 64,000 |  | $ 64,000 |
Term of agreements (in years) | 5 years |  | 5 years |
Rent expense | $ 3,000 | $ 2,000 | $ 6,000 | $ 5,000

X
- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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X
- Definition Term of lessee's operating lease not yet commenced, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980 + Details
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X
- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980 + Details
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X
- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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X
- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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- Definition Lessee, Operating Lease, Remaining Lease Term + References No definition available. + Details
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- Definition Operating Lease, Lease Not yet Commenced, Expense + References No definition available. + Details
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- Details
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