Inventories, Net (Schedule Of Inventories) (Details) (USD $) In Thousands, unless otherwise specified	Oct. 31, 2011	Jan. 31, 2011
Inventories, Net [Abstract]
Raw materials	$ 47,360	$ 51,783
Work in process	23,472	30,986
Finished goods	8,116	10,252
Total inventories	78,948	93,021
Less: reserves for excess and obsolete inventories	(25,065)	(26,409)
Inventories, net	$ 53,883	$ 66,612