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Property and Equipment, Net (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Jan. 31, 2021 | Jan. 31, 2020 | Jan. 31, 2019
Property, Plant and Equipment [Line Items] |  |  |
Property and equipment, net | $ 165,039 | $ 128,293 |
Depreciation expense | 45,500 | 32,500 | $ 24,900
Capitalized development costs amortization expense | 6,200 | 4,100 | 2,800
Capitalized internally developed software | 29,300 | 17,100 | 7,600
Capitalized stock-based compensation costs | 7,200 | 4,100 | $ 1,900
Computer and network equipment |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, plant and equipment, gross | 102,163 | 66,937 |
Software, including capitalized software development costs |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, plant and equipment, gross | 56,858 | 33,373 |
Furniture and office equipment |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, plant and equipment, gross | 21,682 | 16,752 |
Leasehold improvements |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, plant and equipment, gross | 79,892 | 59,564 |
Property and equipment, excluding work in progress |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property, plant and equipment, gross | 260,595 | 176,626 |
Less: Accumulated depreciation | (121,029) | (81,228) |
Property and equipment, net | 139,566 | 95,398 |
Work in progress |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and equipment, net | $ 25,473 | $ 32,895 |

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