SCHEDULE II SCHEDULE OF VALUATION AND QUALIFYING ACCOUNTS (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2012
Allowance for Bad Debt [Member]
Movement In Valuation Allowances And Reserves [Rollforward]
Balance at Beginning of Period	$ 1,474	$ 1,283	$ 1,165
Charged to Statements of Income	72	324	171
Write-Offs, Net of Recoveries	(313)	(131)	(32)
Impact of Foreign Currency Translation	(12)	(2)	(21)
Balance at End of Period	1,221	1,474	1,283
Allowance for Sales Returns [Member]
Movement In Valuation Allowances And Reserves [Rollforward]
Balance at Beginning of Period	1,036	1,184	1,496
Charged to Statements of Income	982	413	989
Write-Offs, Net of Recoveries	(729)	(548)	(1,303)
Impact of Foreign Currency Translation	(60)	(13)	2
Balance at End of Period	1,229	1,036	1,184
Total Allowance for Doubtful Accounts [Member]
Movement In Valuation Allowances And Reserves [Rollforward]
Balance at Beginning of Period	2,510	2,467	2,661
Charged to Statements of Income	1,054	737	1,160
Write-Offs, Net of Recoveries	(1,042)	(679)	(1,335)
Impact of Foreign Currency Translation	(72)	(15)	(19)
Balance at End of Period	$ 2,450	$ 2,510	$ 2,467