Stock-Based Compensation (Schedule Of Stock Options Activity) (Details) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Shares under option, outstanding at December 31, 2011 (in shares)	306
Shares under option, exercised (in shares)	(153)
Shares under option, outstanding at December 31, 2012 (in shares)	153
Shares under option, exercisable at December 31, 2012 (in shares)	153
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted-average exercise price, outstanding at December 31, 2011 (in dollars per share)	$ 5.06
Weighted-average exercise price, exercised (in dollars per share)	$ 4.89
Weighted-average exercise price, outstanding at December 31, 2012 (in dollars per share)	$ 5.24
Weighted-average exercise price, exercisable at December 31, 2012 (in dollars per share)	$ 5.24
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted-average remaining contractual term, outstanding at December 31, 2012	7 months 6 days
Weighted-average remaining contractual term, exercisable at December 31, 2012	7 months 6 days
Aggregate intrinsic value, outstanding at December 31, 2012	$ 5.7
Aggregate intrinsic value exercisable at December 31, 2012	$ 5.7

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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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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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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