Income (Loss) Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Earnings Per Share [Abstract]
Net Loss Attributable to Parent	$ (13,130)us-gaap_NetIncomeLoss	$ (24,421)us-gaap_NetIncomeLoss
Undistributed Earnings, Basic	0	0
Undistributed Earnings, Diluted	0	0
Dividends	6,375us-gaap_Dividends	6,255us-gaap_Dividends
Dividends attributable to common stockholders under the two class method	6,160	6,048
Net loss available to common stockholders, basic	(13,345)	(24,628)
Net loss available to common stockholders, diluted	$ (13,345)	$ (24,628)
Weighted-average common shares outstanding - basic	49,212,207	48,329,375
Weighted Average Number Diluted Shares Outstanding Adjustment	0	0
Weighted-average common shares outstanding - diluted	49,212,207	48,329,375
Basic earnings (loss) per share	$ (0.27)us-gaap_EarningsPerShareBasic	$ (0.51)us-gaap_EarningsPerShareBasic
Diluted earnings (loss) per share	$ (0.27)us-gaap_EarningsPerShareDiluted	$ (0.51)us-gaap_EarningsPerShareDiluted

Add Back of Dividends attributable to common stockholders under the two class method

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Undistributed Earnings (Loss) Allocated to Participating Securities, Basic

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Undistributed Earnings (Loss) Allocated to Participating Securities, Diluted

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Amount of paid and unpaid cash, stock, and paid-in-kind (PIK) dividends declared, for example, but not limited to, common and preferred stock.

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (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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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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Net Income or Loss Available to Common Stockholders plus adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions.

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The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation.

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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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