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Debt - Carrying Amount Of Equity Component (Details) - Convertible Debt - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Jan. 31, 2021 | Jan. 31, 2020
Convertible Senior Notes Due 2023 |  |
Debt Instrument [Line Items] |  |
Proceeds allocated to the conversion option (debt discount) | $ 134,667 | $ 134,667
Less: extinguishment or conversion | (31,933) | 0
Less: transaction costs | (3,336) | (3,336)
Net carrying value of mezzanine and permanent equity component | 99,398 | $ 131,331
Excess of if-converted value over principal | $ 259,578 |
Debt interest rate percentage | 5.90% | 5.90%
Convertible Senior Notes Due 2024 |  |
Debt Instrument [Line Items] |  |
Proceeds allocated to the conversion option (debt discount) | $ 64,453 |
Less: transaction costs | (1,185) |
Net carrying value of mezzanine and permanent equity component | 63,268 |
Excess of if-converted value over principal | $ 0 |
Debt interest rate percentage | 3.80% |

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- Definition Debt Instrument, Convertible, Gross Amount Of Equity Component + References No definition available. + Details
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- Definition Debt Instrument, Face Amount Of Equity Component + References No definition available. + Details
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- Definition Debt Issuance Costs, Equity Component Of Convertible Debt + References No definition available. + Details
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- Definition The carrying amount of the equity component of convertible debt which may be settled in cash upon conversion. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870 + Details
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- Definition The amount by which the convertible debt's if-converted value exceeds its principle amount at the balance sheet date, regardless of whether the instrument is currently convertible. This element applies to public companies only. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031898-161870 + Details
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- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6036836-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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