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		9 Months Ended
	Dec. 31, 2015	Jan. 02, 2015	Dec. 31, 2015	Jan. 02, 2015
Earnings Per Share [Abstract]
Weighted average common shares outstanding used in calculating basic net income per share attributable to ViaSat, Inc. common stockholders	48,712	47,375	48,275	46,920
Weighted average options to purchase common stock as determined by application of the treasury stock method	229	426	297	518
Weighted average restricted stock units to acquire common stock as determined by application of the treasury stock method	529	503	502	521
Weighted average potentially issuable shares in connection with certain terms of the ViaSat 401(k) Profit Sharing Plan and Employee Stock Purchase Plan	160	135	156	138
Weighted average shares used in computing diluted net income per share attributable to ViaSat, Inc. common stockholders	49,630	48,439	49,230	48,097