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Stock Based Compensation - Non-vested Restricted Stock and PSU Award Activity (Details) - $ / shares	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Number of Non-vested Restricted Shares
Forfeited (in shares)		(5,120)
Restricted Stock
Number of Non-vested Restricted Shares
Non-vested shares at beginning of period (in shares)	507,536	422,928
Granted (in shares)	536,242	206,597
Vested (in shares)	(205,080)	(200,064)
Forfeited (in shares)	0
Non-vested shares at end of period (in shares)	838,698	424,341
Weighted Average Per Share Grant Date Fair Value
Non-vested shares at beginning of period (in dollars per share)	$ 5.91	$ 6.36
Granted (in dollars per share)	6.30	5.57
Vested (in dollars per share)	5.85	6.55
Forfeited (in dollars per share)	0	6.25
Non-vested shares at end of period (in dollars per share)	$ 6.18	$ 5.90
Performance Share Awards
Number of Non-vested Restricted Shares
Non-vested shares at beginning of period (in shares)	842,792	0
Granted (in shares)	1,175,726	653,365
Vested (in shares)	0	0
Non-vested shares at end of period (in shares)	2,018,518	653,365
Weighted Average Per Share Grant Date Fair Value
Non-vested shares at beginning of period (in dollars per share)	$ 4.20	$ 0
Granted (in dollars per share)	4.01	4.08
Vested (in dollars per share)	0	0
Non-vested shares at end of period (in dollars per share)	$ 4.09	$ 4.08

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- Definition

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

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-SubTopic 10
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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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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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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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