Debt and Credit Facility (Details) - USD ($)	12 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Apr. 02, 2016	Jul. 01, 2017
Long Term Debt [Line Items]
New carrying value	$ 996,882,000	$ 995,247,000
Amortization of debt discount	2,548,000	11,692,000	$ 12,048,000
Line of Credit Facility, Maximum Borrowing Capacity	400,000,000
Additional borrowing capacity from Revolving Credit Facility	$ 150,000,000
Line of Credit Facility, Expiration Date	Dec. 31, 2021
Line of Credit Facility, Average Outstanding Amount	$ 0
2019 and 2021 Notes Payable [Member]
Long Term Debt [Line Items]
Contractual coupon interest (net of interest rate swap)	25,625,000	25,625,000	25,625,000
Amortization of debt issuance costs	586,000	586,000	586,000
Amortization of debt discount	1,049,000	1,022,000	995,000
Total interest expense related to the 2024 Notes	27,260,000	27,233,000	27,206,000
2019 Notes Payable [Member]
Long Term Debt [Line Items]
Debt Instrument, Face Amount	500,000,000	500,000,000
Debt Instrument, Unamortized Discount	501,000	1,037,000
Unamortized Debt Issuance Expense	(313,000)	(654,000)
New carrying value	499,186,000	498,309,000
2021 Notes Payable [Member]
Long Term Debt [Line Items]
Debt Instrument, Face Amount	500,000,000	500,000,000
Debt Instrument, Unamortized Discount	1,593,000	2,107,000
Unamortized Debt Issuance Expense	(711,000)	(955,000)
New carrying value	497,696,000	496,938,000
2017 Convertible Notes
Long Term Debt [Line Items]
Debt Instrument, Face Amount	0	457,918,000		$ 0
Debt Instrument, Unamortized Discount	0	1,977,000
Contractual coupon interest (net of interest rate swap)	2,300,000	14,652,000	15,750,000
Amortization of debt issuance costs	184,000	1,398,000	1,448,000
Amortization of debt discount	1,406,000	10,670,000	11,052,000
Total interest expense related to the 2024 Notes	$ 3,890,000	$ 26,720,000	$ 28,250,000