Goodwill And Intangible Assets (Schedule Of Changes In Carrying Amount Of Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 31, 2012	Jan. 31, 2010
Goodwill [Line Items]
Balance as of February 1, 2011	$ 70,426	$ 17,019
Goodwill acquired during the year	31,011
Foreign currency translation adjustment	(4,156)
Balance as of February 1, 2012	97,281	17,019
Americas [Member]
Goodwill [Line Items]
Balance as of February 1, 2011	2,966
Goodwill acquired during the year	0
Foreign currency translation adjustment	0
Balance as of February 1, 2012	2,966
Europe [Member]
Goodwill [Line Items]
Balance as of February 1, 2011	67,460
Goodwill acquired during the year	31,011
Foreign currency translation adjustment	(4,156)
Balance as of February 1, 2012	$ 94,315