Shares Used In Computing Diluted Net Income Per Share (Details) In Thousands, unless otherwise specified	3 Months Ended
Jun. 29, 2012	Jul. 01, 2011
Shares used in computing diluted net income per share
Weighted average common shares outstanding used in calculating basic net income per share attributable to ViaSat, Inc. common stockholders	43,182	41,803
Weighted average options to purchase common stock as determined by application of the treasury stock method		1,435
Weighted average restricted stock units to acquire common stock as determined by application of the treasury stock method		373
Weighted average potentially issuable shares in connection with certain terms of the amended ViaSat 401(k) Profit Sharing Plan and Employee Stock Purchase Plan equivalents		138
Weighted average shares used in computing diluted net income per share attributable to ViaSat, Inc. common stockholders	43,182	43,749

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.

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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.

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