Pension (detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 29, 2013	Jun. 30, 2012
General Discussion Of Pension And Other Postretirement Benefits [Abstract]
Defined Benefit Plan, Service Cost	$ 1,863	$ 2,221
Defined Benefit Plan, Interest Cost	1,890	1,764
Defined Benefit Plan, Expected Return on Plan Assets	(2,373)	(2,291)
Defined Benefit Plan, Actuarial Net (Gains) Losses	584	338
Defined Benefit Plan, Amortization of Transition Obligations (Assets)	0	(57)
Defined Benefit Plan, Net Periodic Benefit Cost	$ 1,964	$ 1,975