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Consolidated Statements of Cash Flows (Reconciliation) - USD ($) $ in Thousands	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017
Reconciliation of cash, cash equivalents, and restricted cash as shown in the statements of cash flows
Cash and cash equivalents	$ 638,554	$ 1,134,355	$ 539,923
Total cash, cash equivalents, and restricted cash	642,203	1,135,654	541,894
Prepaid expenses and other current assets
Reconciliation of cash, cash equivalents, and restricted cash as shown in the statements of cash flows
Restricted cash	3,519	0	0
Other assets
Reconciliation of cash, cash equivalents, and restricted cash as shown in the statements of cash flows
Restricted cash	$ 130	$ 1,299	$ 1,971

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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