LOSS PER COMMON SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Numerator:
Net (loss) income	$ (177,280)	$ 169	$ (351,043)	$ (4,244)
Denominator:
Weighted average common shares outstanding, basic (in shares)	75,509,088	74,386,386	74,904,776	74,181,869
Weighted average dilutive effect of stock options, RSAs and RSUs		355,125
Weighted average common shares outstanding, diluted (in shares)	75,509,088	74,741,511	74,904,776	74,181,869
(Loss) income per common share, basic and diluted	$ (2.35)	$ 0.00	$ (4.69)	$ (0.06)
Scenario, Plan [Member]
Denominator:
Weighted average dilutive effect of stock options, RSAs and RSUs	235,830		399,746	383,742

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The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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