Pension (detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
General Discussion Of Pension And Other Postretirement Benefits [Abstract]
Defined Benefit Plan, Service Cost	$ 1,863	$ 2,223	$ 3,726	$ 4,444
Defined Benefit Plan, Interest Cost	1,890	1,763	3,780	3,527
Defined Benefit Plan, Expected Return on Plan Assets	(2,372)	(2,291)	(4,745)	(4,582)
Defined Benefit Plan, Actuarial Net (Gains) Losses	583	337	1,167	675
Defined Benefit Plan, Amortization of Transition Obligations (Assets)	0	(57)	0	(114)
Defined Benefit Plan, Net Periodic Benefit Cost	$ 1,964	$ 1,975	$ 3,928	$ 3,950