SCHEDULE II SCHEDULE OF VALUATION AND QUALIFYING ACCOUNTS (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2011
Allowance for Bad Debt [Member]
Movement In Valuation Allowances And Reserves [Rollforward]
Balance at Beginning of Period	$ 1,283	$ 1,165	$ 1,657
Charged (Credited) to Statements of Income	324	171	(186)
Write-Offs, Net of Recoveries	(131)	(32)	(328)
Impact of Foreign Currency Translation	(2)	(21)	22
Balance at End of Period	1,474	1,283	1,165
Allowance for Sales Returns [Member]
Movement In Valuation Allowances And Reserves [Rollforward]
Balance at Beginning of Period	1,184	1,496	1,785
Charged (Credited) to Statements of Income	413	989	654
Write-Offs, Net of Recoveries	(548)	(1,303)	(968)
Impact of Foreign Currency Translation	(13)	2	25
Balance at End of Period	1,036	1,184	1,496
Total Allowance for Doubtful Accounts [Member]
Movement In Valuation Allowances And Reserves [Rollforward]
Balance at Beginning of Period	2,467	2,661	3,442
Charged (Credited) to Statements of Income	737	1,160	468
Write-Offs, Net of Recoveries	(679)	(1,335)	(1,296)
Impact of Foreign Currency Translation	(15)	(19)	47
Balance at End of Period	$ 2,510	$ 2,467	$ 2,661