Deferred Compensation Arrangement with Individual, Minimum Vesting

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- Definition

Deferred Compensation Arrangement with Individual, Out-Of-The-Money Options

+ References

No definition available.

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- Definition

Deferred Compensation Arrangement with Individual, Underwater Options Tendered

+ References

No definition available.

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- Definition

Deferred Compensation Arrangement with Individual, Underwater Options Tendered, Percent

+ References

No definition available.

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- Definition

Deferred Compensation Arrangement with Individual, Unfunded Options

+ References

No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Market Price After Discount, Purchase Date

+ References

No definition available.

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i)(4))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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- Definition

Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.

+ References

No definition available.

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- Definition

Number of warrants or rights outstanding.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i))
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- Definition

Aggregate number of common shares reserved for future issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Unrecognized cost of unvested share-based compensation awards.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
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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.

+ 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

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

The number of shares issued during the period upon the conversion of units. An example of a convertible unit is an umbrella partnership real estate investment trust unit (UPREIT unit).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21463-112644

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- Definition

Value of stock issued during the period upon the conversion of units. An example of a convertible unit is an umbrella partnership real estate investment trust unit (UPREIT unit).

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Stockholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions			1 Months Ended	3 Months Ended
	Jul. 20, 2017	Apr. 14, 2017	May 31, 2015	Mar. 31, 2018	Jul. 19, 2017	Jul. 10, 2017
Employee Stock Options And Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to unvested options				$ 167.6
Unrecognized compensation expense related to unvested options, estimated weighted average period				2 years 3 months 18 days
Common Class A [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of securities called by each warrant						500,000
Exercise price of warrant (in usd per share)						$ 5.23
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period				10 years
Warrants outstanding				500,000
Common Class A [Member] \| 2015 Equity Incentive Plan [Member] \| Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance (in shares)				16,500,000
Common Class A [Member] \| 2015 Employee Stock Purchase Plan [Member] \| Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance (in shares)			3,800,000
Percent of share price available to employees			85.00%
Eligible Employees [Member] \| 2015 Equity Incentive Plan [Member] \| Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unfunded right to receive stock on a date in time in the future (in shares)		1
Out-of-the-money options		2
Minimum vesting		1 year
Underwater options tendered					3,700,000
Underwater options tendered, percent					85.00%
Stock issued in exchange (in shares)	1,800,000
Stock issued in exchange	$ 8.5