Net (Loss) Income Per Share (Reconciliation Of Maximum Potential Dilution Of Shares Currently Excluded From The Calculation Of Diluted Net Income Per Share) (Details) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted average shares excluded from the calculation of diluted income per share	30,394		29,076
Employee Stock-Based Awards [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted average shares excluded from the calculation of diluted income per share	4,422		3,083
1.75% Convertible Senior Subordinated Notes Due April 15, 2015 [Member] | Warrants [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted average shares excluded from the calculation of diluted income per share	25,972	[1]	25,993	[1]

[1] Amounts represent the incremental potential total dilution that could occur if our Convertible Notes and warrants were converted to shares of our common stock.