v2.3.0.11

Equity Incentive Plans (Summary Stock-Based Compensation Plans) (Details) (USD $)	6 Months Ended
	Jun. 30, 2011
Balance, June 30, 2011	7,285,646
Balance, Weighted Average Exercise Price, June 30, 2011	12.68
Restricted Shares and Options Available For Grant [Member]
Balance, January 1, 2011	2,140,090
Granted	(816,674)
Shares issued for director compensation	(9,481)
Cancelled	102,409
Additional shares registered	6,400,000
Balance, June 30, 2011	7,816,344
Restricted Stock [Member]
Balance, January 1, 2011	154,000
Restricted stock or RSUs vested, Number Outstanding	(43,000)
Balance, June 30, 2011	111,000
Balance, Weighted Average Grant Date Fair Value, January 1, 2011	19.00
Restricted shares vested, Weighted Average Grant Date Fair Value	19.07
Balance, Weighted Average Grant Date Fair Value, June 30, 2011	18.97
Stock Options [Member]
Balance, January 1, 2011	8,073,965
Exercised	(694,744)
Cancelled	(93,575)
Balance, June 30, 2011	7,285,646
Balance, Weighted Average Exercise Price, January 1, 2011	12.27
Exercised, Weighted Average Exercise Price	7.35
Cancelled, Weighted Average Exercise Price	16.80
Balance, Weighted Average Exercise Price, June 30, 2011	12.68
RSUs [Member]
Granted, Number Outstanding	816,674
Cancelled, Number Outstanding	(8,834)
Balance, June 30, 2011	807,840
Granted, Weighted Average Grant Date Fair Value	23.59
Cancelled, Weighted Average Grant Date Fair Value	23.54
Balance, Weighted Average Grant Date Fair Value, June 30, 2011	23.59

X

- Definition

The number of shares that were cancelled as a result of the occurrence of a terminating event specified in the contractual agreements pertaining to the stock-based compensation plans or awards that expired during the period.

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- Definition

The number of grants made during the period under the share-based compensation plans.

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- Definition

The additional number of shares (or other type of equity) approved (usually by shareholders and board of directors) via subsequent amendments and adjustments, for awards through the stock-based compensation plans.

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The number of shares issued to directors in lieu of cash compensation.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(2)(e)
-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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- Definition

The weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect during the reporting period as a result of the occurrence of a terminating event specified in the contractual agreement of the plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X

- 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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition

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).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X

- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Subparagraph b(2)(a)
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- Definition

The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Paragraph A240
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X

- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(2)(d)
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X

- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(2)(d)
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X

- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X

- Definition

The weighted average price at which option holders acquired shares when converting their stock options into shares under the plan during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(1)(e)
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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X

- Definition

For presentations that combine terminations, 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 or that expired.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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X

- Definition

The combined weighted average exercise price associated with stock options during the period that have either lapsed or been forfeited.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition

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.

+ References

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- Definition

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

+ References

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