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Income Taxes - Additional Information (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Jan. 31, 2026 | Jan. 31, 2025 | Jan. 31, 2024 | Jan. 31, 2023
Income Tax Disclosure [Line Items] |  |  |  |
Statutory U.S. federal income tax rate | 21.00% | 21.00% | 21.00% |
Valuation allowance increase (decrease), amount | $ 38,100 | $ (202,200) |  |
Valuation allowance | 66,601 | 28,526 |  |
Net deferred tax asset | 372,817 | 295,094 |  |
Benefit from (provision for) income taxes | 16,654 | 159,461 | $ 66,446 |
Cash paid for income taxes, net of tax refunds | 12,510 | 13,600 | 8,500 |
Unrecognized tax benefits | 66,505 | 132,574 | $ 118,981 | $ 103,636
Unrecognized tax benefits that would impact effective tax rate | 38,100 |  |  |
Unrecognized tax benefits that would impact deferred tax assets adjustment | $ 28,400 |  |  |
UK |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |
Open tax year | 2022 |  |  |
Capitalization Requirement in Current Year |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |
Net deferred tax asset | $ 64,000 | $ 90,200 |  |
Foreign |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |
Net operating loss carry forwards | $ 239,900 |  |  |
Research and experimental capitalized and amortized over period | 15 years |  |  |
Federal |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |
Net operating loss carry forwards | $ 111,100 |  |  |
Tax credit carry forward | $ 93,300 |  |  |
Operating loss carryforwards expiration year | 2037 |  |  |
Research and development tax credit carryforwards expiration year | 2027 |  |  |
Net operating loss carry forwards with indefinite expiration | $ 119,200 |  |  |
Research and experimental capitalized and amortized over period | 5 years |  |  |
State |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |
Net operating loss carry forwards | $ 462,600 |  |  |
Tax credit carry forward | $ 79,800 |  |  |
Operating loss carryforwards expiration year | 2027 |  |  |

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