Debt and Credit Facility (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 29, 2014	Apr. 01, 2017	Apr. 02, 2016	Mar. 28, 2015	Mar. 12, 2014	Jul. 03, 2010
Long Term Debt [Line Items]
Long-term Debt, Excluding Current Maturities		$ 995,247,000	$ 993,639,000
Amortization of Debt Discount (Premium)		11,692,000	12,048,000	$ 12,022,000
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]
Proceeds from Issuance of Long-term Debt	$ 990,100,000
Interest Expense, Debt, Excluding Amortization		25,625,000	25,625,000	25,625,000
Amortization of Financing Costs		586,000	586,000	586,000
Amortization of Debt Discount (Premium)		1,022,000	995,000	970,000
Interest Expense, Debt		$ 27,233,000	27,206,000	27,181,000
2019 Notes Payable [Member]
Long Term Debt [Line Items]
Debt Instrument, Maturity Date		Mar. 15, 2019
Debt Instrument, Face Amount			500,000,000		$ 500,000,000
Debt Instrument, Interest Rate, Stated Percentage					2.125%
Debt Instrument, Unamortized Discount		$ 1,037,000	1,560,000
Unamortized Debt Issuance Expense		$ (654,000)	(996,000)
Discount Percent Of Par					99.477%
2021 Notes Payable [Member]
Long Term Debt [Line Items]
Debt Instrument, Maturity Date		Mar. 15, 2021
Debt Instrument, Face Amount			500,000,000		$ 500,000,000
Debt Instrument, Interest Rate, Stated Percentage					3.00%
Debt Instrument, Unamortized Discount		$ 2,107,000	2,605,000
Unamortized Debt Issuance Expense		$ (955,000)	(1,200,000)
Discount Percent Of Par					99.281%
2017 Convertible Notes
Long Term Debt [Line Items]
Debt Instrument, Maturity Date		Jun. 15, 2017
Debt Instrument, Face Amount		$ 457,918,000	600,000,000			$ 600,000,000
Debt Instrument, Interest Rate, Stated Percentage						2.625%
Debt Instrument, Unamortized Discount		1,977,000	18,135,000
Interest Expense, Debt, Excluding Amortization		14,652,000	15,750,000	15,750,000
Amortization of Financing Costs		1,398,000	1,448,000	1,448,000
Amortization of Debt Discount (Premium)		10,670,000	11,052,000	11,052,000
Interest Expense, Debt		$ 26,720,000	$ 28,250,000	$ 28,250,000