Net Income per Share Attributable to Deckers Outdoor Corporation Common Stockholders (Details)	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Reconciliations of basic to diluted weighted-average common shares outstanding
Weighted-average shares used in basic computation (in shares)	38,603,000	38,615,000	38,595,000	38,638,000
Dilutive effect of NSUs and stock options (in shares)	587,000	613,000	681,000	620,000
Weighted-average shares used in diluted computation (in shares)	39,190,000	39,228,000	39,276,000	39,258,000
NSUs and RSUs
Antidilutive securities excluded from computation of earnings per share
Excluded nonvested stock units (in shares)	402,000	409,000	402,000	409,000
Stock Appreciation Rights (SARs)
Antidilutive securities excluded from computation of earnings per share
Excluded nonvested stock units (in shares)	525,000	720,000	525,000	720,000

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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-Glossary Diluted Earnings Per Share

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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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+ Details