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Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Numerator:
Net Income (Loss)	$ 3,876	$ 6,861	$ 5,754	$ 16,363
Denominator:
Weighted-average common shares outstanding, Basic (in shares)	109,904	116,027	109,818	115,683
Effect of potential dilutive common shares	2,157	4,912	2,384	3,542
Denominator:
Weighted-average common shares outstanding, Diluted (in shares)	112,061	120,939	112,202	119,225
Earnings Per Share, Basic	$ 0.04	$ 0.06	$ 0.05	$ 0.14
Earnings Per Share, Diluted	$ 0.03	$ 0.06	$ 0.05	$ 0.14

X

- Definition

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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