Net income loss available to common stockholders basic and diluted.

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- Definition

Amount of paid and unpaid cash, stock, and paid-in-kind (PIK) dividends declared and applicable to holders of share-based compensation, for example, but not limited to, non-vested shares, stock options, or restricted stock units.

+ References

No definition available.

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- Definition

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

+ References

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- Definition

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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- 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.

+ References

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- Definition

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

Amount of undistributed earnings (loss) allocated to participating securities for the basic earnings (loss) per share or per unit calculation under the two-class method.

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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.

+ References

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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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Earnings per Common Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Numerator:
Net income (loss) attributable to common shareholders	$ 9,462	$ 23,737	$ 16,591	$ (2,003)	$ 4,836	$ 11,315	$ 8,730	$ (4,916)	$ 47,787	$ 19,965	$ 8,254
Less: dividends paid on unvested share-based compensation									(459)us-gaap_DividendsShareBasedCompensation	(328)us-gaap_DividendsShareBasedCompensation	(310)us-gaap_DividendsShareBasedCompensation
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic									0	0	0
Net income (loss) available to common shareholders									$ 47,328	$ 19,637	$ 7,944
Denominator:
Weighted-average number of common shares-basic									65,646,712	61,498,389	55,806,543
Effect of dilutive share-based compensation									617,406	338,352	148,954
Weighted-average number of common shares-diluted									66,264,118	61,836,741	55,955,497
Net income (loss) per share available to common shareholders, basic									$ 0.72us-gaap_EarningsPerShareBasic	$ 0.32us-gaap_EarningsPerShareBasic	$ 0.14us-gaap_EarningsPerShareBasic
Net income (loss) per share available to common shareholders, diluted									$ 0.71us-gaap_EarningsPerShareDiluted	$ 0.32us-gaap_EarningsPerShareDiluted	$ 0.14us-gaap_EarningsPerShareDiluted