Earnings Per Share (Details) (USD $) In Thousands, except Share data	3 Months Ended	6 Months Ended
Aug. 26, 2011	Aug. 27, 2010	Aug. 26, 2011	Aug. 27, 2010
Numerator:
Net income	$ 14,476	$ 8,532	$ 47,069	$ 39,371
Denominator:
Weighted average shares outstanding	40,696,961	40,026,649	40,598,659	39,832,609
Effect of dilutive securities:
Stock options and awards	992,000	848,000	1,244,000	1,029,000
Weighted average shares outstanding - assuming dilution	41,688,787	40,875,329	41,842,760	40,861,761
Earnings per share - basic	$ 0.36	$ 0.21	$ 1.16	$ 0.99
Earnings per share - assuming dilution	$ 0.35	$ 0.21	$ 1.12	$ 0.96

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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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Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Other Comprehensive Income
-URI http://asc.fasb.org/extlink&oid=6519514

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Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Glossary Net Income
-URI http://asc.fasb.org/extlink&oid=6518256

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Reference 16: http://www.xbrl.org/2003/role/presentationRef
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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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Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Weighted-Average Number of Common Shares Outstanding
-URI http://asc.fasb.org/extlink&oid=6528421

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+ Details