Stock-Based Compensation (Outstanding Awards) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2011	Dec. 31, 2010
Outstanding options	45,519	47,583
Outstanding WAEP	$ 11.96	$ 12.10
Exercisable options	15,372
Exercisable WAEP	$ 13.32
Series A [Member]
Outstanding options	45,519
Outstanding WAEP	$ 11.96
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	4.2
Aggregate intrinsic value	$ 172,375
Exercisable options	15,372
Exercisable WAEP	$ 13.32
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	59,853
Common Class B [Member]
Outstanding options	450
Outstanding WAEP	$ 19.74
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	3.7
Aggregate intrinsic value	0
Exercisable options	450
Exercisable WAEP	$ 19.74
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	$ 0

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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-Publisher FASB

-Name Accounting Standards Codification

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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.

+ References

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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 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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The weighted average period between the balance sheet date and expiration for all awards outstanding under the plan, which may be expressed in a decimal value for number of years.

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