Adjustments To Additional Paid In Capital, Stock Issued, Underwriting Fees And Commissions

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Common Stock, Voting Rights, Vote Per Share

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Amount of increase to additional paid-in capital (APIC) from recognition of equity-based compensation.

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The number of new shares issued in the conversion of stock in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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Number of shares issued for each share of convertible preferred stock that is converted.

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Specific incremental costs directly attributable to a proposed or actual offering of securities which are deferred at the end of the reporting period.

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The cash outflow for cost incurred directly with the issuance of an equity security.

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Amount of cash outflow to satisfy an employee's income tax withholding obligation as part of a net-share settlement of a share-based award.

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Cash received on stock transaction after deduction of issuance costs.

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The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

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Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of shares (or other type of equity) forfeited during the period.

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Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

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Subsequent Events - Initial Public Offering (Details) $ / shares in Units, $ in Thousands				3 Months Ended
	Apr. 29, 2019 USD ($) $ / shares shares	Apr. 23, 2019 USD ($) $ / shares shares	Apr. 22, 2019 shares	Mar. 31, 2019 USD ($) vote shares	Mar. 31, 2018 USD ($)
Subsequent Event [Line Items]
Share-based compensation expense				$ 694	$ 4,834
Class A common stock
Subsequent Event [Line Items]
Voting rights per share \| vote				1
Class A common stock \| IPO \| Subsequent event
Subsequent Event [Line Items]
Shares sold (in shares) \| shares		75,000,000
Share price (in dollars per share) \| $ / shares		$ 19
Net proceeds		$ 1,368,000
Estimated offering costs		8,700
Class A common stock \| Over-Allotment Option \| Subsequent event
Subsequent Event [Line Items]
Shares sold (in shares) \| shares	11,250,000
Share price (in dollars per share) \| $ / shares	$ 19.00
Net proceeds	$ 205,200
Class A common stock \| Other assets \| IPO \| Subsequent event
Subsequent Event [Line Items]
Offering costs		$ 5,600
Class B common stock
Subsequent Event [Line Items]
Voting rights per share \| vote				20
Redeemable Convertible Preferred Stock And Redeemable Convertible Preferred Stock Warrants Converted \| Class B common stock \| Subsequent event
Subsequent Event [Line Items]
Shares issued in conversion (in shares) \| shares			308,621,636
Shares converted (in shares) \| shares			1
Common Stock Reclassified Into Class B Common Stock \| Class B common stock \| Subsequent event
Subsequent Event [Line Items]
Shares issued in conversion (in shares) \| shares			456,213,756
Shares converted (in shares) \| shares			1
RSUs
Subsequent Event [Line Items]
Service period				4 years
Pro Forma \| Class A common stock \| IPO
Subsequent Event [Line Items]
Net proceeds				$ 1,573,200
Estimated offering costs				8,700
Underwriting discounts and commissions				$ 65,600
Pro Forma \| Class B common stock
Subsequent Event [Line Items]
Shares released (in shares) \| shares				20,221,114
Pro Forma \| RSUs
Subsequent Event [Line Items]
Share-based compensation expense				$ 974,900
Cash payments for tax withholding				$ 303,300