Summary of Significant Accounting Policies and Concentrations of Risk (Tables)

12 Months Ended

Mar. 31, 2012

Summary of Significant Accounting Policies and Concentrations of Risk [Abstract]

Estimated net realizable value of inventories

(In thousands)	March 31, 2012		April 2, 2011
Raw materials	$	11,707	$	15,465
Work-in-process		164,438		214,023
Finished goods		28,721		35,257
	$	204,866	$	264,745