Net Income Per Share (Computation Of Basic And Diluted Net Income Per Share) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
Feb. 28, 2012	Feb. 28, 2011
Net Income Per Share [Abstract]
Net income attributable to TIBCO Software Inc.	$ 20,641	$ 15,953
Weighted-average shares of common stock used to compute basic net income per share	161,460	160,503
Stock options to purchase common stock	7,307	10,255
Restricted common stock awards	2,099	2,728
Weighted-average shares of common stock used to compute diluted net income per share	170,866	173,486
Basic	$ 0.13	$ 0.10
Diluted	$ 0.12	$ 0.09

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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+ Details

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

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-Appendix A

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-Glossary Other Comprehensive Income

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-Glossary Net Income

-URI http://asc.fasb.org/extlink&oid=6518256

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-Number 210

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+ Details

- Definition

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

+ References+ Details

- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

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-Glossary Weighted-Average Number of Common Shares Outstanding

-URI http://asc.fasb.org/extlink&oid=6528421

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+ Details