Interest and Other Expense, Net (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 29, 2012	Oct. 01, 2011	Sep. 29, 2012	Oct. 01, 2011
Components of interest and other expense
Interest income	$ 6,271	$ 6,200	$ 12,063	$ 11,542
Interest expense	(13,717)	(13,634)	(27,412)	(27,248)
Other income (expense), net	(2,557)	(1,164)	(4,326)	(703)
Interest and other expense, net	$ (10,003)	$ (8,598)	$ (19,675)	$ (16,409)