Pension (detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013
General Discussion Of Pension And Other Postretirement Benefits [Abstract]
Defined Benefit Plan, Service Cost	$ 1,868	$ 1,863	$ 3,736	$ 3,726
Defined Benefit Plan, Interest Cost	2,032	1,890	4,064	3,780
Defined Benefit Plan, Expected Return on Plan Assets	(2,740)	(2,373)	(5,480)	(4,745)
Defined Benefit Plan, Actuarial Net (Gains) Losses	31	584	61	1,167
Defined Benefit Plan, Net Periodic Benefit Cost	$ 1,191	$ 1,964	$ 2,381	$ 3,928