Stock-Based Compensation (Summary Of Stock Options)(Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	9 Months Ended
Sep. 30, 2011
Stock-Based Compensation [Abstract]
Number of Options, Outstanding at December 31, 2010	4,825
Number of Options, Granted	399
Number of Options, Exercised	(144)
Number of Options, Forfeited or expired	(232)
Number of Options, Outstanding at September 30, 2011	4,848
Number of Options, Exercisable at September 30, 2011	3,320
Weighted-Average Exercise Price, Outstanding at December 31, 2010	$ 19.18
Weighted-Average Exercise Price, Granted	$ 18.56
Weighted-Average Exercise Price, Exercised	$ 11.18
Weighted-Average Exercise Price, Forfeited or expired	$ 19.43
Weighted-Average Exercise Price, Outstanding at September 30, 2011	$ 19.36
Weighted-Average Exercise Price, Exercisable at September 30, 2011	$ 20.67
Weighted-Average Remaining Contractual Term (Years), Outstanding at December 31, 2010	5.58
Weighted-Average Remaining Contractual Term (Years), Outstanding at September 30, 2011	5.26
Weighted-Average Remaining Contractual Term (Years), Exercisable at September 30, 2011	4.08
Aggregate Intrinsic Value, Outstanding at September 30, 2011	$ 1,277
Aggregate Intrinsic Value, Exercisable at September 30, 2011	$ 1,091

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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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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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The weighted average period between the balance sheet date and expiration for all vested portions of options outstanding and currently exercisable (or convertible) under the plan, which may be expressed in a decimal value for number of years.

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The weighted average price at which option holders acquired shares when converting their stock options into shares under the plan during the reporting period.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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The combined weighted average exercise price associated with stock options during the period that have either lapsed or been forfeited.

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Net number of share options (or share units) granted during the period.

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The weighted average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on stock options awarded under the plan during the reporting period.

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The total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices pertaining to options outstanding under the plan as of the balance sheet date.

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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The weighted average price as of the beginning of the year at which grantees can acquire the shares reserved for issuance under the stock option plan.

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As of the balance sheet date, the total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices of fully vested and expected to vest options outstanding.

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Number of share options (or share units) exercised during the current period.

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