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Leases - Lease assets and liabilities (Details) - USD ($) $ in Thousands | Apr. 30, 2022 | Jan. 31, 2022 | Apr. 30, 2021
--- | --- | --- | ---
Assets and Liabilities, Lessee [Abstract] |  |  |
Operating lease assets | $ 164,607 | $ 169,595 | $ 180,715
Classification of operating lease assets | Operating lease assets |  |
Current operating lease liabilities | $ 41,112 | 42,763 | 43,656
Classification current operating lease liabilities | Current operating lease liabilities |  |
Noncurrent operating lease liabilities | $ 139,686 | 142,868 | 155,218
Classification of noncurrent operating liabilities | Noncurrent operating lease liabilities |  |
Total lease liabilities | $ 180,798 | $ 185,631 | $ 198,874

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- 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=123391704&loc=SL77918627-209977 + Details
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- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as current. + 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=123391704&loc=SL77918627-209977 + Details
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- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent. + 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=123391704&loc=SL77918627-209977 + Details
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- 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=123391704&loc=SL77918627-209977 + Details
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