Convertible Senior Notes, Warrants, and Hedges (Net Carrying Amount Rollforward) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
	Oct. 02, 2016	Oct. 02, 2016	Apr. 03, 2016
Convertible Debt Carrying Amount [Roll Forward]
Net carrying amount, beginning of period		$ 272,221
Net carrying amount, end of period	$ 278,798	278,798	$ 272,221
Convertible debt | 0.875% Convertible Senior Notes Due 2022
Convertible Debt Carrying Amount [Roll Forward]
Net carrying amount, beginning of period		272,221	266,867
Amortization of debt issuance costs during the period	270	540	450
Amortization of debt discount during the period	3,038	6,037	4,904
Net carrying amount, end of period	$ 278,798	278,798	$ 272,221
Interest paid		$ 1,700