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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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.

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The weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated during the reporting period due to noncompliance with plan terms during the reporting period.

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

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Stockholders' Equity (Summary Of The Option And Stock Appreciation Rights Activity) (Details) (USD $)	6 Months Ended	12 Months Ended	6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011 $10.00 - $125.50 [Member]	Jun. 30, 2012 $6.80 - $8.10 [Member]	Jun. 30, 2012 $0.00 - $0.00 [Member]	Jun. 30, 2012 $6.90 - $125.50 [Member]	Jun. 30, 2012 $6.80 - $116.40 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Options/SARs, Outstanding, December 31, 2011	562,733
Number of Options/SARs, Granted	5,423
Number of Options/SARs, Exercised
Number of Options/SARs, Forfeited	(144,487)
Number of Options/SARs, Outstanding, June 30, 2012	423,669
Weighted Average Exercise Price per Share, Outstanding, December 31, 2011	$ 48.53
Weighted Average Exercise Price per Share, Granted	$ 7.53
Weighted Average Exercise Price per Share, Exercised
Weighted Average Exercise Price per Share, Forfeited	$ 57.52
Weighted Average Exercise Price per Share, Outstanding, June 30, 2012	$ 44.95
Range of Exercise Price, Lower limit		$ 10.00	$ 6.80	$ 0.00	$ 6.90	$ 6.80
Range of Exercise Price, Upper limit		$ 125.50	$ 8.10	$ 0.00	$ 125.50	$ 116.40