STOCK BASED COMPENSATION - Awards Activity (Details) - RSUs and RSAs - $ / shares	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019
Number of Shares
Beginning of the period balance (in shares)	717,999	1,155,359
Shares granted (in shares)	250,118	321,784
Shares settled (in shares)	(211,210)	(179,325)
Shares forfeited (in shares)	(30,292)	(50,037)
End of the period balance (in shares)	726,615	1,247,781
Weighted Average Grant Date Fair Value
Beginning of the period balance (in usd per share)	$ 10.53	$ 10.97
Shares granted (in usd per share)	11.72	9.80
Shares settled (in usd per share)	10.51	11.40
Shares forfeited (in usd per share)	11.08	10.69
End of the period balance (in usd per share)	$ 10.92	$ 10.62

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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- 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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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

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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- Definition

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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- Definition

Number of shares under non-option equity instrument agreements that were cancelled as a result of occurrence of a terminating event.

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- Definition

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

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Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

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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)(1)(ii)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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