Shares Used In Computing Diluted Net Income Per Share - Shares Used in Computing Diluted Net Income Per Share (Detail) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2015	Oct. 03, 2014	Sep. 30, 2015	Oct. 03, 2014
Earnings Per Share [Abstract]
Weighted average common shares outstanding used in calculating basic net income per share attributable to ViaSat, Inc. common stockholders	48,205	46,863	48,052	46,694
Weighted average options to purchase common stock as determined by application of the treasury stock method	317	528	332	563
Weighted average restricted stock units to acquire common stock as determined by application of the treasury stock method	520	545	469	507
Weighted average potentially issuable shares in connection with certain terms of the ViaSat 401(k) Profit Sharing Plan and Employee Stock Purchase Plan	83	80	142	135
Weighted average shares used in computing diluted net income per share attributable to ViaSat, Inc. common stockholders	49,125	48,016	48,995	47,899