Net Loss per Common Share (Details) - Reconciliation of Net Income (Loss) and Shares Used in Calculating Basic and Diluted Earnings Per Share - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
Mar. 31, 2016	Mar. 31, 2015
Earnings Per Share [Abstract]
Net Loss	$ (279,475)	$ (125,469)
Less: Preferred dividends	(3,905)	(3,905)
Net Loss related to common stockholders	$ (283,380)	$ (129,374)
Weighted average common shares outstanding – basic (in shares)	36,683	44,118
Add: Effect of dilutive non-vested awards, assumed vested (in shares)	0	0
Weighted average common shares outstanding – diluted (in shares)	36,683	44,118

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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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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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The amount of preferred stock dividends that is an adjustment to net income apportioned to common stockholders.

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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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