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Summary of Significant Accounting Policies Schedule of Impact of New Accounting Pronouncements (Details) - USD ($) $ in Thousands | Jan. 31, 2020 | Jan. 31, 2019
--- | --- | ---
Current assets: |  |  |
Prepaid expenses and other current assets | $ 32,950 | $ 28,237 | [1]
Total current assets | 1,599,725 | 708,116 | [1]
Operating lease right-of-use assets | 125,204 | 121,389 | [1]
Other noncurrent assets | 18,505 | 15,089 | [1]
Total assets | 1,955,395 | 984,313 | [1]
Liabilities and stockholders’ equity |  |  |
Accrued expenses and other liabilities | 36,887 | 33,653 | [1]
Total current liabilities | 546,963 | 573,104 | [1]
Operating lease liabilities, noncurrent | 154,511 | 147,046 | [1]
Other noncurrent liabilities | 5,361 | 3,018 | [1]
Total liabilities | 1,550,051 | 731,936 | [1]
Total liabilities and stockholders’ equity | $ 1,955,395 | 984,313 | [1]
As Reported |  |  |
Current assets: |  |  |
Prepaid expenses and other current assets |  | 29,451 |
Total current assets |  | 709,330 |
Operating lease right-of-use assets |  | 0 |
Other noncurrent assets |  | 15,286 |
Total assets |  | 864,335 |
Liabilities and stockholders’ equity |  |  |
Accrued expenses and other liabilities |  | 24,740 |
Total current liabilities |  | 564,191 |
Operating lease liabilities, noncurrent |  | 0 |
Other noncurrent liabilities |  | 38,999 |
Total liabilities |  | 611,958 |
Total liabilities and stockholders’ equity |  | 864,335 |
Adoption of ASC 842 |  |  |
Current assets: |  |  |
Prepaid expenses and other current assets |  | (1,214) |
Total current assets |  | (1,214) |
Operating lease right-of-use assets |  | 121,389 |
Other noncurrent assets |  | (197) |
Total assets |  | 119,978 |
Liabilities and stockholders’ equity |  |  |
Accrued expenses and other liabilities |  | 8,913 |
Total current liabilities |  | 8,913 |
Operating lease liabilities, noncurrent |  | 147,046 |
Other noncurrent liabilities |  | (35,981) |
Total liabilities |  | 119,978 |
Total liabilities and stockholders’ equity |  | $ 119,978 |
[1] | Adjusted for adoption of ASC 842. See Note 2.

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