Stockholders' Equity (Summary Of The Option And Stock Appreciation Rights Activity) (Details) (USD $)		12 Months Ended	3 Months Ended
Mar. 31, 2013	Dec. 31, 2012 $1.63 - $116.40 [Member]	Mar. 31, 2013 $0.00 - $0.00 [Member]	Mar. 31, 2013 $0.00 - $0.00 [Member]	Mar. 31, 2013 $8.10 - $68.60 [Member]	Mar. 31, 2013 $1.63 - $116.40 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Options/SARs, Outstanding, December 31, 2012	319,438
Number of Options/SARs, Forfeited					(54,461)
Number of options/SARs, outstanding, March 31, 2013	319,438	373,899				319,438
Weighted Average Exercise Price per Share, Outstanding, December 31, 2012	$ 44.74
Weighted Average Exercise Price per Share, Forfeited					$ 38.96
Weighted Average Exercise Price per Share, Outstanding, March 31, 2013	$ 44.74	$ 43.90				$ 44.74
Range of Exercise Price, Lower limit		$ 1.63	$ 0.00	$ 0.00	$ 8.10	$ 1.63
Range of Exercise Price, Upper limit		$ 116.40	$ 0.00	$ 0.00	$ 68.60	$ 116.40

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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

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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.

+ References

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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 price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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