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Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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The cumulative difference between the rental payments required by a lease agreement and the rental income or expense recognized on a straight-line basis, or other systematic and rational basis more representative of the time pattern in which use or benefit is granted or derived from the leased property, expected to be recognized in income or expense over the term of the leased property by the lessor or lessee, respectively.

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Amount of investment in equity security without readily determinable fair value.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Present value of lessee's discounted obligation for lease payments from operating lease.

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Amount of lessee's right to use underlying asset under operating lease.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Summary of Significant Accounting Policies - Narrative (Details) - USD ($)	Apr. 30, 2019	Mar. 31, 2019	Feb. 01, 2019	Jan. 31, 2019
Accounting Policies [Abstract]
Equity investments in privately-held companies		$ 15,500,000		$ 0
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets	$ 143,361,000
Operating lease liabilities	171,699,000
Derecognition related to build-to-suit asset	(84,094,000)			$ (75,832,000)
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets			$ 93,900,000
Operating lease liabilities			121,800,000
Deferred rent			26,600,000
Israel Leased Property \| Other Capitalized Property Plant and Equipment \| Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Derecognition related to build-to-suit asset	$ 2,500,000
Derecognition related to build-to-suit liability			$ 2,500,000