CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2017	Jan. 01, 2017	Dec. 31, 2017	Jan. 01, 2017
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (68,241)	$ 34,735	$ (32,847)	$ 80,273
Other comprehensive income (loss), net of taxes:
Currency translation adjustments	597	(1,949)	3,229	(3,091)
Change in net unrealized loss on investments, net of tax	(893)	(1,418)	(682)	(1,451)
Total other comprehensive gain (loss)	(296)	(3,367)	2,547	(4,542)
Comprehensive income (loss)	$ (68,537)	$ 31,368	$ (30,300)	$ 75,731