EARNINGS PER SHARE - Reconciliation of weighted average shares outstanding (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
EARNINGS PER SHARE
Net loss available for stockholders:	$ (48,686)	$ (34,055)	$ (81,197)	$ (26,507)
Less: Adjustments for losses attributable to participating securities		(153)		(240)
Net loss used in calculating losses per share	$ (48,686)	$ (34,208)	$ (81,197)	$ (26,747)
Weighted average shares outstanding (including participating securities)	217,576	212,598	217,501	213,586
Adjustment for participating securities	(3,313)	(4,442)	(3,314)	(3,391)
Shares used in calculating basic losses per share	214,263	208,156	214,187	210,195
Dilutive effect of stock based awards
Shares used in calculating diluted losses per share	214,263	208,156	214,187	210,195

Represents weighted number of shares including participating securities.

No definition available.

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- Definition

The total amount of dividends declared in the period for each class of stock and the contractual amount of dividends (or interest on participating income bonds) that must be paid for the period (for example, unpaid cumulative dividends). Dividends declared in the current period do not include dividends declared in respect of prior-period unpaid cumulative dividends. Preferred dividends that are cumulative only if earned are deducted only to the extent that they are earned.

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- References

No definition available.

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- Definition

This element represents nonvested share-based payment awards that contain non-forfeitable rights to dividends or dividend equivalents (whether paid or unpaid). Basic and dilutive earnings per share are generally disclosed for such shares using the two-class method.

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- Definition

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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- Definition

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

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Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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- Definition

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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