Inventories, Net (Schedule Of Inventories) (Details) (USD $) In Thousands	Jul. 31, 2011	Jan. 31, 2011
Inventories, Net
Raw materials	$ 49,657	$ 51,783
Work in process	29,534	30,986
Finished goods	9,032	10,252
Total inventories	88,223	93,021
Less: reserves for excess and obsolete inventories	(24,741)	(26,409)
Inventories, net	$ 63,482	$ 66,612