Stock/Unit Based Compensation - Stock Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
Sep. 30, 2020	Sep. 30, 2020	Dec. 31, 2019
Shares
Beginning balance (in shares)		1,421
Granted (in shares)		770
Forfeited (in shares)		(86)
Vested (in shares)		(426)
Ending balance (in shares)	1,679	1,679	1,421
Weighted-Average Grant Date Fair Value
Beginning balance (in dollars per share)		$ 6.72
Granted (in dollars per share)		1.60
Forfeited (in dollars per share)		8.40
Vested (in dollars per share)		4.82
Ending balance (in dollars per share)	$ 4.54	$ 4.54	$ 6.72
Weighted Average Remaining Contractual Terms (Years)		1 year 3 months 25 days	1 year 3 months 3 days
Aggregate Intrinsic Value	$ 5,154	$ 5,154	$ 3,464
Restricted Stock
Shares
Beginning balance (in shares)		1,120
Granted (in shares)	0	542
Forfeited (in shares)		(71)
Vested (in shares)		(426)
Ending balance (in shares)	1,165	1,165	1,120
Weighted-Average Grant Date Fair Value
Beginning balance (in dollars per share)		$ 6.87
Granted (in dollars per share)		1.74
Forfeited (in dollars per share)		8.86
Vested (in dollars per share)		4.82
Ending balance (in dollars per share)	$ 4.79	$ 4.79	$ 6.87
Weighted Average Remaining Contractual Terms (Years)		1 year 14 days	11 months 26 days
Aggregate Intrinsic Value	$ 3,578	$ 3,578	$ 2,731
Performance Stock
Shares
Beginning balance (in shares)		301
Granted (in shares)	0	228
Forfeited (in shares)		(15)
Vested (in shares)		0
Ending balance (in shares)	514	514	301
Weighted-Average Grant Date Fair Value
Beginning balance (in dollars per share)		$ 6.14
Granted (in dollars per share)		1.28
Forfeited (in dollars per share)		6.19
Vested (in dollars per share)		0
Ending balance (in dollars per share)	$ 3.98	$ 3.98	$ 6.14
Weighted Average Remaining Contractual Terms (Years)		1 year 11 months 8 days	2 years 3 months
Aggregate Intrinsic Value	$ 1,576	$ 1,576	$ 733

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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
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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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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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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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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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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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-Publisher FASB
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Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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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Intrinsic value of outstanding award under share-based payment arrangement. Excludes share and unit options.

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