Employee Benefit Plans - Share-Based Awards Granted (Details)	9 Months Ended
Sep. 30, 2018 $ / shares shares
Performance Share Units
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Vesting Period	3 years
Maximum \| Performance Share Units
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Vesting Percentage	200.00%
Minimum \| Performance Share Units
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Vesting Percentage	0.00%
January 2, 2018 - 33% per year over three years
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Date of Grant	Jan. 02, 2018
Shares / Units \| shares	449,271
Grant Date Fair Value Per Share \| $ / shares	$ 7.54
Vesting Percentage	33.00%
Vesting Period	3 years
January 2, 2018 - 100% on January 2, 2021
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Date of Grant	Jan. 02, 2018
Shares / Units \| shares	449,271
Grant Date Fair Value Per Share \| $ / shares	$ 10.44
Vesting Percentage	100.00%
Vesting Date	Jan. 02, 2021
January 2, 2018 - 100% on January 1, 2020
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Date of Grant	Jan. 02, 2018
Shares / Units \| shares	8,247
Grant Date Fair Value Per Share \| $ / shares	$ 7.54
Vesting Percentage	100.00%
Vesting Date	Jan. 01, 2020
April 2, 2018 - 100% on January 1, 2020
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Date of Grant	Apr. 02, 2018
Shares / Units \| shares	11,064
Grant Date Fair Value Per Share \| $ / shares	$ 5.79
Vesting Percentage	100.00%
Vesting Date	Jan. 01, 2020
July 2, 2018 - 100% on January 1, 2020
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Date of Grant	Jul. 02, 2018
Shares / Units \| shares	6,565
Grant Date Fair Value Per Share \| $ / shares	$ 8.33
Vesting Percentage	100.00%
Vesting Date	Jan. 01, 2020
August 21, 2018 - 100% on August 21, 2019
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Date of Grant	Aug. 21, 2018
Shares / Units \| shares	6,093
Grant Date Fair Value Per Share \| $ / shares	$ 8.97
Vesting Percentage	100.00%
Vesting Date	Aug. 21, 2019

Grant date of share-based payment award.

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- Definition

Vesting date of share-based payment award.

+ References

No definition available.

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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

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.

+ 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 (a)(1)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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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).

+ 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)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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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).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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- Definition

Percentage of vesting of share-based compensation awards.

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