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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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- Definition

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

+ References

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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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

For net-share settlement of share-based awards when the employer settles employees' income tax withholding obligations, this element represents the number of shares the employees use to repay the employer.

+ References

No definition available.

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- Definition

Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Topic 210
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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period, Consecutive Trading Days Closing Price Exceeds Threshold

+ References

No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Closing Price Threshold for Determining Vesting

+ References

No definition available.

+ Details

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Equity-based Compensation - Market-Based Restricted Stock Units Narrative (Details) - Equity Plan [Member] - USD ($)		12 Months Ended
	Jul. 28, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
General and Administrative Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense				$ 100,000
Market-Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Closing price threshold (in dollars per share)				$ 10
Closing price, threshold for consecutive trading days				20 days
Number of shares vested (shares)	610,839		610,839
Number of shares settled for tax withholding (shares)	199,858
Number of shares issued, net of tax withholding (shares)	410,981
Unrecognized compensation expense		$ 0
Market-Based Restricted Stock Units [Member] \| General and Administrative Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense		$ 0	$ (800,000)	$ 6,000,000