Share-Based Compensation (Schedule Of Stock Option Activity) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended
Sep. 30, 2011
Number of Shares, Outstanding at December 31, 2010	2,183,000
Number of Shares, Granted	2,149,000
Number of Shares, Exercised	(33,000)
Number of Shares, Cancelled	(314,000)
Number of Shares, Outstanding at September 30, 2011	3,985,000
Number of Shares, Exercisable at September 30, 2011	1,584,000
Weighted-Average Exercise Price Per Share, Outstanding at December 31, 2010	$ 8.13
Weighted-Average Exercise Price Per Share, Granted	$ 8.16
Weighted-Average Exercise Price Per Share, Exercised	$ 5.08
Weighted-Average Exercise Price Per Share, Cancelled	$ 8.37
Weighted-Average Exercise Price Per Share, Outstanding at September 30, 2011	$ 8.15
Weighted-Average Exercise Price Per Share, Exercisable at September 30, 2011	$ 8.14
Weighted-Average Remaining Contractual Term (in yrs), Outstanding at December 31, 2010	7.13
Weighted-Average Remaining Contractual Term (in yrs), Outstanding at September 30, 2011	7.86
Weighted-Average Remaining Contractual Term (in yrs), Exercisable at September 30, 2011	5.66
Aggregate Intrinsic Value of In-the-Money Options, Outstanding at December 31, 2010	$ 8,710
Aggregate Intrinsic Value of In-the-Money Options, Outstanding at September 30, 2011	363
Aggregate Intrinsic Value of In-the-Money Options, Exercisable at September 30, 2011	$ 272
Stock Option Activity For Options That Contain Performance Or Market Conditions [Member]
Number of Shares, Outstanding at December 31, 2010	117
Number of Shares, Granted	400
Number of Shares, Cancelled	(15)
Number of Shares, Outstanding at September 30, 2011	502
Number of Shares, Exercisable at September 30, 2011	102
Weighted-Average Exercise Price Per Share, Outstanding at December 31, 2010	$ 13.57
Weighted-Average Exercise Price Per Share, Granted	$ 9.21
Weighted-Average Exercise Price Per Share, Cancelled	$ 11.91
Weighted-Average Exercise Price Per Share, Outstanding at September 30, 2011	$ 10.14
Weighted-Average Exercise Price Per Share, Exercisable at September 30, 2011	$ 13.81
Weighted-Average Remaining Contractual Term (in yrs), Outstanding at December 31, 2010	9.04
Weighted-Average Remaining Contractual Term (in yrs), Outstanding at September 30, 2011	9.14
Weighted-Average Remaining Contractual Term (in yrs), Exercisable at September 30, 2011	8.16

The total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices of vested portions of options outstanding and currently exercisable under the option plan as of the balance sheet date.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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