v2.3.0.15

Stock-Based Compensation Restricted Stock Units Summary (Details) (Restricted Stock Units (RSUs) [Member], USD $)
In Thousands, except Per Share data

9 Months Ended

Sep. 30, 2011

Sep. 30, 2010

Restricted Stock Units (RSUs) [Member]

[Line Items]

Outstanding, beginning balance, Number

588

326

Granted, Number

286

^[1]

215

^[1]

Granted, Weighted Average Grant Date Fair Value

$ 54.82

^[1]

$ 63.42

^[1]

Released, Number

(201)

(78)

Released, Aggregate Intrinsic Value

$ 15,739

^[2]

$ 5,216

^[2]

Forfeited, Number

(37)

(14)

Outstanding, ending balance, Number

636

449

Expected to vest, Number

544

Expected to vest, Aggregate Intrinsic Value

$ 16,040

^[2]

[1]	These restricted stock units do not include the respective 2010 and 2011 awards under the Performance Award Agreement, which are not eligible for vesting as of September 30 of each respective year.
[2]	The aggregate intrinsic value is the market value of the stock, before applicable income taxes, based on the closing price on the stock release dates or at the end of the period for restricted stock units expected to vest.

X

- Definition

The aggregate intrinsic value of RSUs, as at the end of the period, expected to vest, is the market value of stock, before applicable income taxes, based on the closing price at the end of the period.

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Total number of restricted awards expected to vest as of the end of the reporting period.

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The aggregate instrinsic value for RSU's released is the market value of stock, before applicable income taxes, based on the closing price on the stock release date.

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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-Publisher FASB

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-Number 123R

-Paragraph A240

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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-Publisher FASB

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-Subparagraph b(2)(c)

-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 number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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-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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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Number of shares related to Restricted Stock Award forfeited during the period.

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-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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Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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