STOCK BASED COMPENSATION (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	$ 1,600	$ 1,600	$ 3,400	$ 3,100
Unrecognized compensation expense	$ 11,800		$ 11,800
Nonvested award, cost not yet recognized, period for recognition			1 year 6 months
Weighted average remaining contractual term	10 months 24 days
PSU - 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-vested (in shares)	1,587,607		1,587,607

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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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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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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