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Stockholders' Equity (Schedule Of Stock Option Activity) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2011
Stockholders' Equity
Beginning Balance, Number of shares	100,000
Beginning Balance, Weighted-average exercise price	$ 107.28
Beginning Balance, Weighted-average remaining contractual life (yrs.)	2.1
Beginning Balance, Aggregate intrinsic value	$ 4,494	[1]
Grants, Number of shares
Grants, Weighted-average exercise price
Exercises, Number of shares
Exercises, Weighted-average exercise price
Forfeitures, Number of shares
Forfeitures, Weighted-average exercise price
Ending Balance, Number of shares	100,000
Ending Balance, Weighted-average exercise price	$ 107.28
Ending Balance, Weighted-average remaining contractual life (yrs.)	1.6
Ending Balance, Aggregate intrinsic value	1,911	[1]
Vested, Number of shares	100,000
Vested, Weighted-average remaining contractual life (yrs.)	1.6
Vested, Aggregate intrinsic value	1,911	[1]
Exercisable, Number of shares	100,000
Exercisable, Weighted-average remaining contractual life (yrs.)	1.6
Exercisable, Aggregate intrinsic value	$ 1,911	[1]
[1] The aggregate intrinsic value in the table above represents the total pre-tax intrinsic value (the difference between the Company's closing stock price on the respective trading day and the exercise price, multiplied by the number of in-the-money options) that would have been received by the option holders had all option holders exercised their options on the respective trading day. The amount of aggregate intrinsic value will change based on the fair market value of the Company's common stock.

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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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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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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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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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