Fair Value Measurements (Details 1) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Jan. 02, 2016	Dec. 27, 2014	Jan. 02, 2016	Dec. 27, 2014
Changes in Level 3 instruments measured at fair value on a recurring basis
Balance as of beginning of period		$ 10,413	$ 20,608	$ 10,312	$ 20,160
Total realized and unrealized gains (losses) included in other comprehensive income		(302)	717	(201)	1,165
Sales and settlements, net	[1]	0	(11,000)	0	(11,000)
Balance as of end of period		$ 10,111	$ 10,325	$ 10,111	$ 10,325

[1] During the first nine months of fiscal 2015, the Company redeemed $11.0 million of student loan auction rate securities for cash at par value. There was no redemption during the first nine months of fiscal 2016.