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Net Income Per Share Anti-dilutive Common Stock Equivalents Not Included in Calculation of Net Income Per Diluted Share (Details) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Computation of basic and diluted earnings per share
Anti-dilutive securities excluded from computation of earnings per share	26,976	32,102
Stock Options and RSUs [Member]
Computation of basic and diluted earnings per share
Anti-dilutive securities excluded from computation of earnings per share	7,870	6,489
Warrants [Member]
Computation of basic and diluted earnings per share
Anti-dilutive securities excluded from computation of earnings per share	9,553	14,694
Senior Convertible Notes [Member]
Computation of basic and diluted earnings per share
Anti-dilutive securities excluded from computation of earnings per share	9,553	10,919

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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