Financial Instruments - Financial Instruments and Balance Sheet Classification (Detail) - USD ($) $ in Thousands |
Apr. 30, 2019 |
Apr. 30, 2018 |
Apr. 30, 2017 |
Apr. 30, 2016 |
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Investment Holdings [Line Items] | |||||||
Cash and cash equivalents | $ 626,360 | $ 520,848 | $ 410,882 | $ 273,252 | |||
Marketable Securities, Current | 8,288 | 14,293 | |||||
Marketable securities, non-current | 132,463 | 122,792 | |||||
Income Taxes & Other Receivables | 26,767 | 29,089 | |||||
Fair Value, Inputs, Level 1 | |||||||
Investment Holdings [Line Items] | |||||||
Cost | 761,799 | 647,925 | |||||
Unrealized Gains | 6,301 | 11,040 | |||||
Unrealized Losses | (989) | (1,032) | |||||
Fair Value | 767,111 | 657,933 | |||||
Cash and cash equivalents | 626,360 | 520,848 | |||||
Marketable Securities, Current | 8,288 | 14,293 | |||||
Marketable securities, non-current | 132,463 | 122,792 | |||||
Fair Value, Inputs, Level 1 | Cash | |||||||
Investment Holdings [Line Items] | |||||||
Cost | 579,998 | 519,818 | |||||
Fair Value | 579,998 | 519,818 | |||||
Cash and cash equivalents | 579,998 | 519,818 | |||||
Fair Value, Inputs, Level 1 | Money Market Funds | |||||||
Investment Holdings [Line Items] | |||||||
Cost | 46,362 | 1,030 | |||||
Fair Value | 46,362 | 1,030 | |||||
Cash and cash equivalents | 46,362 | 1,030 | |||||
Fair Value, Inputs, Level 1 | Mutual Funds | |||||||
Investment Holdings [Line Items] | |||||||
Cost | [1] | 135,439 | 127,077 | ||||
Unrealized Gains | [1] | 6,301 | 11,040 | ||||
Unrealized Losses | [1] | (989) | (1,032) | ||||
Fair Value | [1] | 140,751 | 137,085 | ||||
Marketable Securities, Current | [1] | 8,288 | 14,293 | ||||
Marketable securities, non-current | [1] | 132,463 | 122,792 | ||||
Fair Value, Inputs, Level 2 | Foreign Exchange Forward Contracts | |||||||
Investment Holdings [Line Items] | |||||||
Unrealized Gains | 821 | 1,778 | |||||
Unrealized Losses | (722) | (1,025) | |||||
Fair Value | 99 | 753 | |||||
Income Taxes & Other Receivables | 99 | 753 | |||||
Fair Value, Inputs, Level 2 | Interest Rate Swap | |||||||
Investment Holdings [Line Items] | |||||||
Fair Value | 619 | 2,076 | |||||
Income Taxes & Other Receivables | 619 | 2,076 | |||||
Unrealized Gains | $ 619 | $ 2,076 | |||||
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- Definition Total cost basis of cash and cash equivalents and marketable securities. No definition available.
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- Definition Income taxes and other receivables. No definition available.
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- Definition Trading Securities Unrealized Holding Gain Accumulated In Investments No definition available.
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- Definition Trading Securities Unrealized Holding Loss Accumulated In Investments No definition available.
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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition 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. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition 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. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Fair value portion 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. No definition available.
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- Definition Amount of 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. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Cost of investment in debt investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security with change in fair value recognized in net income (FV-NI). Excludes equity method investment and investment in equity security without readily determinable fair value. No definition available.
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- Definition Fair value as of the balance sheet date of all foreign currency derivative assets not designated as hedging instruments. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Fair value as of the balance sheet date of all foreign currency derivatives not designated as hedging instruments. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Fair value as of the balance sheet date of all foreign currency derivative liabilities not designated as hedging instruments. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Fair value as of the balance sheet date of all interest rate derivative assets designated as cash flow hedging instruments. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Fair value as of the balance sheet date of all interest rate derivatives designated as cash flow hedging instruments. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition 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. No definition available.
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- Definition Amount of investment in marketable security, classified as current. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of investment in marketable security, classified as noncurrent. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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