Convertible Debentures and Revolving Credit Facility (Details Textual) (USD $)	3 Months Ended	9 Months Ended
	Dec. 28, 2013	Dec. 28, 2013	Mar. 30, 2013	Mar. 31, 2007
Debt Instrument [Line Items]
Interest rate of debentures	3.125%	3.125%
3.125% Junior Convertible Debentures [Member]
Debt Instrument [Line Items]
Principal amount of Debentures	$ 689,635,000	$ 689,635,000	$ 689,635,000
Interest rate of debentures	3.125%	3.125%		3.125%
Conversion rate of convertible debentures per $1 thousand principal amount		34.2957
Base conversion block amount of junior convertible debenture		1,000
Effective conversion price of debentures	$ 29.16	$ 29.16
Maximum borrowing capacity of revolving credit facility	250,000,000	250,000,000
Line of Credit Facility, Average Outstanding Amount	0
2.625% Senior Convertible Debentures [Member]
Debt Instrument [Line Items]
Principal amount of Debentures	600,000,000	600,000,000	600,000,000
Interest rate of debentures	2.625%	2.625%
Conversion rate of convertible debentures per $1 thousand principal amount		33.3681
Base conversion block amount of senior convertible debenture		$ 1,000
Effective conversion price of debentures	$ 29.97	$ 29.97