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Earnings (Loss) Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Numerator:
Net Income (Loss)	$ 5,513	$ (5,725)	$ 18,360	$ (23,971)
Denominator:
Weighted-average common shares outstanding, Basic (in shares)	114,523	112,640	114,080	112,144
Effect of potential dilutive common shares	3,683	0	3,460	0
Denominator:
Weighted-average common shares outstanding, Diluted (in shares)	118,206	112,640	117,540	112,144
Earnings Per Share, Basic	$ 0.05	$ (0.05)	$ 0.16	$ (0.21)
Earnings Per Share, Diluted	$ 0.05	$ (0.05)	$ 0.16	$ (0.21)

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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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