Shares Used In Computing Diluted Net Income Per Share - Shares Used in Computing Diluted Net Income Per Share (Detail) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Oct. 03, 2014	Oct. 04, 2013	Oct. 03, 2014	Oct. 04, 2013
Earnings Per Share [Abstract]
Weighted average common shares outstanding used in calculating basic net income per share attributable to ViaSat, Inc. common stockholders	46,863	45,484	46,694	45,304
Weighted average options to purchase common stock as determined by application of the treasury stock method	528	831	563	838
Weighted average restricted stock units to acquire common stock as determined by application of the treasury stock method	545	696	507	635
Weighted average potentially issuable shares in connection with certain terms of the ViaSat 401(k) Profit Sharing Plan and Employee Stock Purchase Plan equivalents	80	56	135	121
Weighted average shares used in computing diluted net income per share attributable to ViaSat, Inc. common stockholders	48,016	47,067	47,899	46,898