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Share-based Compensation Arrangement By Share-based Payment Award, Non-Option Equity Instruments, Grants In Period, Weighted Average Exercise Price

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Share-based Compensation Arrangement by Share-based Payment Award, Authorized Shares, Annual Increase, Number of Shares

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Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Converted into Common Units

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Share-based Compensation Arrangement by Share-based Payment Award, Potential Increase In Authorized Shares

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Share-based Compensation Arrangement by Share-based Payment Award, Potential Increase In Authorized Shares, Percentage Of Shares Outstanding

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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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Face amount or stated value per share of common stock.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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- Definition

Unrecognized cost of unvested share-based compensation awards.

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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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Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

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Unrecognized cost of unvested options awarded to employees as compensation.

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- Definition

Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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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.

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Equity-Based Compensation - Narrative (Details) $ / shares in Units, $ in Thousands			9 Months Ended	12 Months Ended
	Jan. 01, 2018 shares	Sep. 22, 2017 shares	Sep. 30, 2018 USD ($) $ / shares shares	Dec. 31, 2018 USD ($) vote $ / shares shares	Dec. 31, 2017 USD ($) $ / shares shares	Dec. 31, 2016 USD ($) $ / shares	Oct. 10, 2017 $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense \| $				$ 35,733	$ 84,790	$ 5,935
Common Stock, Par or Stated Value Per Share \| $ / shares							$ 0.001
Preferred Stock, Shares Authorized				10,000,000	10,000,000
Preferred Stock, Par or Stated Value Per Share \| $ / shares				$ 0.001	$ 0.001
Common Stock, Voting Rights, Votes Per Share \| vote				1
Class A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, Shares Authorized				750,000,000	750,000,000
Common Stock, Par or Stated Value Per Share \| $ / shares				$ 0.001	$ 0.001
Common Stock, Voting Rights, Votes Per Share \| vote				1
Class B
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, Shares Authorized				300,000,000	300,000,000
Common Stock, Par or Stated Value Per Share \| $ / shares				$ 0.001	$ 0.001
Common Stock, Voting Rights, Votes Per Share \| vote				1
Class C
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, Shares Authorized				75,000,000	75,000,000
Common Stock, Par or Stated Value Per Share \| $ / shares				$ 0.001	$ 0.001
Common Stock, Voting Rights, Votes Per Share \| vote				10
2017 Incentive Award Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number			7,352,000		5,725,000
2017 Incentive Award Plan \| Class A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares reserved and available for issuance (in shares)		25,000,000
Number of additional shares to be issued (in shares)		17,000,000
Percent of shares outstanding for potential increase in authorized shares		5.00%
Annual increase in the aggregate number of shares reserved and available for issuance (in shares)	7,933,534
2005 Common Membership Unit Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number				0	110,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price \| $ / shares				$ 2.85
Common Unit Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition			2 years 9 months 12 days
Granted (in dollars per share) \| $ / shares				$ 0	$ 0	$ 0
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options \| $				$ 23,600
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options \| $				$ 3,800
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition				3 years 1 month 15 days
RSUs \| 2017 Incentive Award Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition			3 years 26 days
Equity-based compensation expense \| $			$ 32,500
Granted (in shares)				3,091,000
Granted (in dollars per share) \| $ / shares				$ 15.03	$ 18.01
RSAs \| Director Compensation Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition			5 months 5 days
Equity-based compensation expense \| $			$ 300
Chief Executive Officer [Member] \| Common Unit Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)			7,500,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Converted into Common Units				7,500,000
President [Member] \| Common Unit Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)			1,500,000
Share-based Compensation Arrangement By Share-based Payment Award, Non-Option Equity Instruments, Grants In Period, Weighted Average Exercise Price \| $ / shares			$ 11.69
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Converted into Common Units				472,000