Debt and Credit Facility (Details 2) $ / shares in Units, shares in Millions	3 Months Ended		9 Months Ended		17 Months Ended
	Jan. 02, 2016 USD ($) $ / shares shares	Dec. 27, 2014 USD ($)	Jan. 02, 2016 USD ($) $ / shares shares	Dec. 27, 2014 USD ($)	Jun. 15, 2017	Mar. 28, 2015 USD ($)
Short-term Debt [Line Items]
Amortization of Debt Discount (Premium)			$ 9,033,000	$ 9,014,000
Two And Six Two Five Percent Senior Convertible Debentures [Member]
Short-term Debt [Line Items]
Maximum number of common shares to be purchased under call option | shares	20.5		20.5
Debt Instrument, Convertible, Remaining Discount Amortization Period					1 year 5 months 13 days
Debt Instrument, Face Amount	$ 600,000,000		$ 600,000,000			$ 600,000,000
Debt Instrument, Convertible, Conversion Ratio	34.1754
Debt Instrument, Unamortized Discount	$ 22,021,000		22,021,000			33,679,000
Hedge Accounting Adjustment - Sale Of Interest Rate Swap	6,364,000		6,364,000			9,732,000
Debt Instrument Carrying Amount Of Liability Component	584,343,000		584,343,000			576,053,000
Debt Instrument, Convertible, Carrying Amount of Equity Component	66,415,000		66,415,000			$ 66,415,000
Interest Expense, Debt, Excluding Amortization	3,938,000	$ 3,938,000	11,813,000	11,813,000
Amortization of Financing Costs	362,000	362,000	1,086,000	1,086,000
Amortization of Debt Discount (Premium)	2,763,000	2,763,000	8,289,000	8,289,000
Interest Expense, Debt	7,063,000	$ 7,063,000	$ 21,188,000	$ 21,188,000
Base conversion, block amount of senior convertible debenture	$ 1,000
Warrants, number of shares the holders have the right to purchase | shares	20.5		20.5
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares	$ 41.45		$ 41.45
Convertible debt, conversion price | $ / shares	$ 29.2608		$ 29.2608
Debt Instrument, Convertible, If-converted Value in Excess of Principal	$ 990,800,000		$ 990,800,000