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Earnings (Loss) Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Numerator:
Allocation of undistributed earnings, Basic	$ (7,844)	$ (32,216)	$ (18,246)	$ (60,106)
Denominator:
Weighted-average common shares outstanding, Basic (in shares)	112,183	110,553	111,892	110,456
Net loss per share, Basic (in dollars per share)	$ (0.07)	$ (0.29)	$ (0.16)	$ (0.54)
Numerator:
Allocation of undistributed earnings, Diluted	$ (7,844)	$ (32,216)	$ (18,246)	$ (60,106)
Denominator:
Weighted-average common shares outstanding, Diluted (in shares)	112,183	110,553	111,892	110,456
Net loss per share, Diluted (in dollars per share)	$ (0.07)	$ (0.29)	$ (0.16)	$ (0.54)

X

- Definition

The earnings attributable to each security on the basis that all of the earnings for the period had been distributed (to the extent that each security may share in earnings). This is the earnings amount which reflects the participation rights in undistributed earnings of each security.

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The earnings that is allocated to common stock and participating securities to the extent that each security may share in earnings as if all of the earnings for the period had been distributed. Includes the adjustments resulting from the assumption that dilutive securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions.

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