Equity - RSUs and PRSUs Activity (Details) - $ / shares	9 Months Ended	10 Months Ended
Sep. 30, 2018	Dec. 31, 2017
Number of shares
Outstanding, beginning of period (in shares)
Vested (in shares)	(210,400)
Outstanding, end of period (in shares)	1,396,000
Restricted Stock Units (RSUs)
Number of shares
Outstanding, beginning of period (in shares)	683,000
Outstanding, beginning of period (in shares)	682,000
Granted (in shares)	217,000	690,000
Vested (in shares)	(210,000)	(3,000)
Forfeited (in shares)	(32,000)	(5,000)
Outstanding, end of period (in shares)	658,000	683,000
Outstanding, end of period (in shares)		682,000
Weighted average Grant Date Fair Value
Outstanding, beginning of period (in dollars per share)	$ 10.12
Granted (in dollars per share)	11.81	$ 10.12
Vested (in dollars per share)	10.12	10.12
Forfeited (in dollars per share)	10.35	10.12
Outstanding, end of period (in dollars per share)	$ 10.67	$ 10.12
Performance-based Restricted Stock Units (PRSUs)
Number of shares
Outstanding, beginning of period (in shares)	622,000	0
Granted (in shares)	132,000	622,000
Vested (in shares)	0	0
Forfeited (in shares)	(16,000)	0
Outstanding, end of period (in shares)	738,000	622,000
Weighted average Grant Date Fair Value
Outstanding, beginning of period (in dollars per share)	$ 7.09
Granted (in dollars per share)	7.65	$ 7.09
Vested (in dollars per share)	0.00	0.00
Forfeited (in dollars per share)	7.25	0.00
Outstanding, end of period (in dollars per share)	$ 7.19	$ 7.09

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

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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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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- Definition

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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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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No definition available.

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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No definition available.

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

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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(ii)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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