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Stock Incentive Plans - Stock Awards Activity (Details)	9 Months Ended
	Sep. 30, 2019 $ / shares shares
Weighted- Average Grant Date Fair Value
Stock of common stock earned for the PSUs vested in 2018	74.33%
Restricted Stock
Number of Shares
Beginning Balance (in shares)	641,844
Granted (in shares)	73,240
Vested (in shares)	(300,575)
Forfeited (in shares)	(21,534)
Ending Balance (in shares)	392,975
Weighted- Average Grant Date Fair Value
Beginning balance (in dollars per share) | $ / shares	$ 10.25
Granted (in dollars per share) | $ / shares	10.65
Vested (in dollars per share) | $ / shares	10.07
Forfeited (in dollars per share) | $ / shares	10.37
Ending balance (in dollars per share) | $ / shares	$ 10.46
Performance Stock Units
Number of Shares
Beginning Balance (in shares)	781,923
Granted (in shares)	296,050
Additional units from dividends (in shares)	30,778
Vested (in shares)	(251,375)
Forfeited (in shares)	(70,728)
Ending Balance (in shares)	786,648
Weighted- Average Grant Date Fair Value
Beginning balance (in dollars per share) | $ / shares	$ 11.19
Granted (in dollars per share) | $ / shares	10.14
Additional units from dividends (in dollars per share) | $ / shares	10.02
Vested (in dollars per share) | $ / shares	8.80
Forfeited (in dollars per share) | $ / shares	9.93
Ending balance (in dollars per share) | $ / shares	$ 11.18
Long-Term Incentive Plan Unit
Number of Shares
Beginning Balance (in shares)	0
Granted (in shares)	281,925
Vested (in shares)	0
Forfeited (in shares)	(37,559)
Ending Balance (in shares)	244,366
Weighted- Average Grant Date Fair Value
Beginning balance (in dollars per share) | $ / shares	$ 0
Granted (in dollars per share) | $ / shares	10.65
Forfeited (in dollars per share) | $ / shares	10.65
Ending balance (in dollars per share) | $ / shares	$ 10.65

X

- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional units from dividends

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Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional units from dividends, Weighted Average Grant Date Fair Value

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

+ References

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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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- 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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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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Percentage of vesting of award under share-based payment arrangement.

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