Inventories (Tables)

6 Months Ended

Oct. 31, 2014

Inventory, Net [Abstract]

Components Of Inventories

The components of inventories were: 

	October 31,			April 30,
(in thousands)	2014			2014
Raw materials	$	17,056		$	13,756
Work-in-process	18,887			19,179
Finished goods	14,262			13,439
Total FIFO inventories	50,205			46,374
Reserve to adjust inventories to LIFO value	(14,870		)	(14,851		)
Total LIFO inventories	$	35,335		$	31,523