Class Of Warrant Or Right, Exercise Price Of Warrants Or Rights, Premium Percentage

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- Definition

Debt Instrument, Convertible, Conversion Price, Percentage Of Principal Amount Plus Accrued And Unpaid Contingent Interest

+ References

No definition available.

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- Definition

Debt Instrument, Convertible, If-Converted Value

+ References

No definition available.

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- Definition

Debt Instrument, Convertible, Threshold Business Days

+ References

No definition available.

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- Definition

Exercise price per share or per unit of warrants or rights outstanding.

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- Definition

Fair value portion of borrowing which can be exchanged for a specified number of another security at the option of the issuer or the holder, for example, but not limited to, the entity's common stock.

+ References

No definition available.

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- Definition

The price per share of the conversion feature embedded in the debt instrument.

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- Definition

Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount.

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- Definition

The number of equity instruments that the holder of the debt instrument would receive if the debt was converted to equity.

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- Definition

Threshold period of specified consecutive trading days within which common stock price to conversion price of convertible debt instrument must exceed threshold percentage for specified number of trading days to trigger conversion feature.

+ References

No definition available.

+ Details

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- Definition

Minimum percentage of common stock price to conversion price of convertible debt instruments to determine eligibility of conversion.

+ References

No definition available.

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- Definition

Threshold number of specified trading days that common stock price to conversion price of convertible debt instruments must exceed threshold percentage within a specified consecutive trading period to trigger conversion feature.

+ References

No definition available.

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- Definition

Face (par) amount of debt instrument at time of issuance.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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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.

+ References

No definition available.

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- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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- Definition

The cash outflow for derivative instruments during the period, which are classified as financing activities, excluding those designated as hedging instruments.

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- Definition

The cash inflow from the issuance of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder.

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- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

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Convertible Senior Notes - Narrative (Details)	1 Months Ended	6 Months Ended
Convertible Senior Notes - Narrative (Details)	Apr. 30, 2018 USD ($) day shares $ / shares	Jul. 31, 2019 USD ($) $ / shares	Jul. 31, 2018 USD ($)	Apr. 04, 2018 $ / shares
Debt Instrument [Line Items]
Proceeds from issuance of convertible senior notes, net of issuance costs		$ 0	$ 562,062,000
Debt issuance costs, net of amortization	$ 12,900,000
Closing price of stock (in dollars per share) \| $ / shares		$ 15.14
Payment for purchase of capped calls		$ 0	64,630,000
Capped Call
Debt Instrument [Line Items]
Payment for purchase of capped calls	64,600,000
Convertible Senior Notes
Debt Instrument [Line Items]
Debt issuance costs, net of amortization	9,800,000	7,553,000
Additional Paid-In Capital
Debt Instrument [Line Items]
Debt issuance costs, net of amortization	$ 3,100,000	$ 3,068,000
Class A
Debt Instrument [Line Items]
Conversion price (in dollars per share) \| $ / shares	$ 26.27
Closing price of stock (in dollars per share) \| $ / shares		$ 15.14		$ 19.83
Class A \| Capped Call
Debt Instrument [Line Items]
Exercise price (in dollars per share) \| $ / shares	$ 39.66
Exercise price premium percentage over last reported sales price				100.00%
Convertible Senior Notes
Debt Instrument [Line Items]
Principal amount	$ 575,000,000.0		$ 575,000,000.0
Interest rate (as a percent)	0.125%
Proceeds from issuance of convertible senior notes, net of issuance costs	$ 562,100,000
Conversion percentage of principal amount plus accrued and unpaid contingent interest	100.00%
Convertible debt, fair value based on the closing trading price per $100 of the Notes		$ 558,700,000
If-converted value		$ 331,300,000
Convertible Senior Notes \| Class A
Debt Instrument [Line Items]
Number of convertible shares at initial conversion rate (in shares) \| shares	21,884,155
Conversion ratio (in shares per $1,000 principal amount)	38.0594
Conversion price (in dollars per share) \| $ / shares	$ 26.27
Redemption percentage of principal amount of Notes to be redeemed	100.00%
Convertible Senior Notes \| Class A \| Any Fiscal Quarter Commencing After the Fiscal Quarter Ending on July 31, 2018
Debt Instrument [Line Items]
Threshold trading days \| day	20
Threshold consecutive trading days \| day	30
Threshold percentage of stock price trigger	130.00%
Convertible Senior Notes \| Class A \| Five Business Day Period After any Five Consecutive Trading Day Period
Debt Instrument [Line Items]
Threshold consecutive trading days \| day	5
Threshold percentage of stock price trigger	98.00%
Threshold business days \| day	5
Convertible Senior Notes \| Class A \| Immediately Preceding the Date on Which We Provide Notice of Redemption
Debt Instrument [Line Items]
Threshold trading days \| day	2