Stock-Based Compensation - Summary of Grants Awarded (Details)	9 Months Ended
Sep. 30, 2019 $ / shares shares
February 5, 2019 \| Restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock \| shares	435,173
Grant date fair value of restricted stock \| $ / shares	$ 5.08
February 5, 2019 \| Performance shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance shares \| shares	628,943
Grant date fair value of performance shares \| $ / shares	$ 5.54
February 19, 2019 \| Restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock \| shares	854,058
Grant date fair value of restricted stock \| $ / shares	$ 5.17
February 19, 2019 \| Performance shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance shares \| shares	80,850
Grant date fair value of performance shares \| $ / shares	$ 5.54
May 1, 2019 \| Restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock \| shares	87,775
Grant date fair value of restricted stock \| $ / shares	$ 3.42
June 12, 2019 \| Restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock \| shares	102,373
Grant date fair value of restricted stock \| $ / shares	$ 3.21
July 17, 2019 \| Restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock \| shares	27,383
Grant date fair value of restricted stock \| $ / shares	$ 4.80

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).

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

Per share weighted average intrinsic value of equity-based compensation awards granted. Excludes stock and unit options.

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

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-SubTopic 10
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-Paragraph 2
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