Income Taxes (Reconciliation Of The Total Amount Of Gross Unrecognized Tax Benefits) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2011
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Gross unrecognized tax benefits, beginning balance	$ 3,685	$ 5,075	$ 3,107
Increases in tax positions for prior years	2,890	1,590	2,742
Decreases in tax positions for prior years	(127)	(208)
Increases in tax positions for current year	171	56	86
Expiration of statutes of limitation	(38)	(791)	(860)
Settlements	(1,106)	(1,990)
Changes due to translation of foreign currencies	124	(47)
Gross unrecognized tax benefits, ending balance	$ 5,599	$ 3,685	$ 5,075