Stock-Based Compensation 3 (Details) (Third Amended 2003 Plan [Member], USD $)	Dec. 31, 2011
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of options	3,594,246
Weighted-average remaining contractual life	6.73
Weighted-average exercise price - Outstanding	$ 21.75
Exercisable	2,478,000
Weighted-average exercise price - Exercisable	$ 19.86
Price Range 12.55 - 15.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of options	792,934
Weighted-average remaining contractual life	6.96
Weighted-average exercise price - Outstanding	$ 12.55
Exercisable	792,934
Weighted-average exercise price - Exercisable	$ 12.55
Price Range 15.01 - 20.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of options	205,573
Weighted-average remaining contractual life	4.78
Weighted-average exercise price - Outstanding	$ 16.90
Exercisable	205,573
Weighted-average exercise price - Exercisable	$ 16.90
Price Range 20.01 - 25.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of options	1,726,790
Weighted-average remaining contractual life	7.00
Weighted-average exercise price - Outstanding	$ 23.28
Exercisable	1,127,284
Weighted-average exercise price - Exercisable	$ 23.04
Price Range 25.01 - 28.48 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of options	868,949
Weighted-average remaining contractual life	6.47
Weighted-average exercise price - Outstanding	$ 28.23
Exercisable	352,209
Weighted-average exercise price - Exercisable	$ 27.85

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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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

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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.

+ References

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-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

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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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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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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

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-Subparagraph b(1)(a)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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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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