Shares Used In Computing Diluted Net Income (Loss) Per Share - Shares Used in Computing Diluted Net Income (Loss) Per Share (Detail) - shares shares in Thousands	3 Months Ended
	Jun. 30, 2015	Jul. 04, 2014
Earnings Per Share [Abstract]
Weighted average common shares outstanding used in calculating basic net income (loss) per share attributable to ViaSat, Inc. common stockholders	47,918	46,528
Weighted average options to purchase common stock as determined by application of the treasury stock method	346
Weighted average restricted stock units to acquire common stock as determined by application of the treasury stock method	402
Weighted average potentially issuable shares in connection with certain terms of the ViaSat 401(k) Profit Sharing Plan and Employee Stock Purchase Plan equivalents	174
Weighted average shares used in computing diluted net income (loss) per share attributable to ViaSat, Inc. common stockholders	48,840	46,528