Inventories Inventories (Tables)

6 Months Ended

Sep. 30, 2017

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories are stated at the lower of actual cost (determined using the first-in, first-out method) or market (estimated net realizable value) and are comprised of the following:

(In thousands)	September 30, 2017		April 1, 2017
Raw materials	$	16,699	$	14,517
Work-in-process	152,252		161,120
Finished goods	46,446		51,396
	$	215,397	$	227,033