Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Number of Shares Affected

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Unrecognized cost of unvested options awarded to employees as compensation.

+ 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

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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- Definition

Net number of share options (or share units) granted during the period.

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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-Publisher FASB
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- Definition

Number of options outstanding, including both vested and non-vested options.

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- Definition

An excess of the fair value of the modified award over the fair value of the award immediately before the modification.

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-Publisher FASB
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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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- Definition

Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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Equity Incentive Plans - Stock Options (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended	12 Months Ended
	Nov. 30, 2016	Jan. 31, 2017	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017	Oct. 31, 2018	Apr. 04, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Closing price of stock (in dollars per share)			$ 17.91
Unrecognized compensation cost related to stock awards, weighted-average period			1 year 9 months 18 days
Stock-based compensation expense			$ 210,645	$ 150,673	$ 116,668
Shares underlying outstanding equity awards (in shares)			35,465,543	46,359,949
Class A common stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Closing price of stock (in dollars per share)						$ 17.91	$ 19.83
Employee Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Intrinsic value of exercised options			$ 165,000	$ 104,900	$ 114,200
Weighted-average grant date fair value of options granted (in dollars per share)					$ 5.57
Total grant date fair value of options vested			45,600	$ 42,500	$ 61,800
Unrecognized compensation cost			32,300
Plan modification, number of shares affected (in shares)	800,000
Plan modification, incremental compensation cost		$ 5,900
Performance Shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of options granted, net of cancellations (in shares)				238,000
Stock-based compensation expense			$ 300	$ 600	$ 3,300
Shares underlying outstanding equity awards (in shares)			0	0
Plan modification, number of shares affected (in shares)	360,000
Unvested restricted stock units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation cost related to stock awards, weighted-average period			3 years
Plan modification, number of shares affected (in shares)	440,000