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Number of additional shares authorized for issuance under an established share-based compensation plan.

+ References

No definition available.

+ Details

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph 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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- 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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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- Definition

Represents the number of option plans in existence as of the reporting date.

+ References

No definition available.

+ Details

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- Definition

Represents the number of additional share options (or share units) granted during the period.

+ References

No definition available.

+ Details

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- Definition

The number of shares awarded under share-based compensation plans that validly exist and are outstanding as of the balance sheet date.

+ References

No definition available.

+ Details

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Share-based Compensation (Details 3)	3 Months Ended			1 Months Ended
Share-based Compensation (Details 3)	Mar. 31, 2013 item	Mar. 31, 2013 1995 Plan	Mar. 31, 2013 2001 Plan	Apr. 30, 2012 2005 Plan	May 31, 2008 2005 Plan	Mar. 31, 2013 2005 Plan
Share-Based Compensation
Number of option plans	3
Additional grants issued (in shares)		0
Increase in the number of shares available for issuance				2,500,000	5,000,000
Number of shares originally available for issuance	20,350,000	4,500,000	500,000			15,350,000
Shares outstanding	16,952,125	4,500,000	500,000			11,952,125
Shares available for grant	3,397,875					3,397,875