Represents the common unit issued in exchange of shares.

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Represents the exchange ratio of converting common units to shares of common stock.

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Number of membership units redeemed of a limited liability company (LLC).

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Equity impact of the value of membership units redeemed of a limited liability company (LLC).

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Equity impact of the value of membership units redeemed of a limited liability company (LLC), cash portion.

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Represents the maximum percentage of the increase in the value of the Company, above certain thresholds, that holders of profits units would receive if CWGS, LLC is sold or other liquidity event as specified by the plan.

+ References

No definition available.

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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

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

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Description of the frequency of periodic payments (monthly, quarterly, annual).

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

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Amount of the required periodic payments applied to principal.

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Amount of cash paid for interest. Includes, but is not limited to, payment to settle zero-coupon bond attributable to accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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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No definition available.

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Net number of non-option equity instruments granted to participants.

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Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

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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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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Equity-based Compensation Plans - CWGS LLC Plan (Details)			1 Months Ended	12 Months Ended
	Oct. 06, 2016 shares	Apr. 04, 2016 USD ($) shares	Apr. 30, 2016 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($) shares	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2012
Share-based Compensation Plans
Share based compensation expense				$ 5,109,000	$ 1,597,000
Profit Units redeemed					17,000,000
CWGS LLC Plan
Share-based Compensation Plans
Percentage of increase in the value of the Company (as a percent)							10.00%
Vesting period							4 years
Share based compensation expense						$ 0
CWGS LLC Plan \| Class A common stock
Share-based Compensation Plans
Exchange ratio for converting common units	1
CWGS LLC Plan \| Board of Directors Chairman
Share-based Compensation Plans
Share based compensation expense					$ 60,000
CWGS LLC Plan \| Board of Directors Chairman \| Notes Payable, Other Payables \| Note Payable to Board of Directors Chairman and Chief Executive Officer
Share-based Compensation Plans
Profit Units redeemed, note payable portion		$ 4,000,000
Interest rate (as a percent)		3.00%
Principal payment		$ 1,500,000
Principal payment frequency		May 1, 2016 and June 1, 2016
Interest Paid			$ 6,250
CWGS LLC Plan \| Profits Units
Share-based Compensation Plans
Authorized (in units) \| shares						15,556
Granted/issued (in units) \| shares					0	15,556
Outstanding (in units) \| shares	13,793				0	15,556
Share based compensation expense					$ 900,000
Units issued in exchange \| shares	5,877,513
Grant date fair value (per unit) \| $ / shares						$ 317
Profit units available for grant \| shares					0
CWGS LLC Plan \| Profits Units \| Board of Directors Chairman
Share-based Compensation Plans
Profit Units redeemed (in shares) \| shares		1,763
Profit Units redeemed		$ 17,000,000
Profit Units redeemed, cash portion		$ 13,000,000