Accumulated Other Comprehensive Income Components of Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2011	Jan. 31, 2010
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation adjustment	$ 25,146	$ 28,200	$ 31,222	$ 29,627
Unrealized loss on derivatives, net of tax	(12)	(205)	(2)	(1,587)
Pension liability, net of tax	265	685	473	(1,876)
Accumulated Other Comprehensive Income (Loss), Net of Tax	25,399	28,680	31,693	26,164
Change in unrealized gain (loss) on derivative instruments	193	(203)	1,585
Change in pension liability	(420)	212	2,349
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(3,281)	(3,013)	5,529
Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Change in foreign currency translation	(3,054)	(3,022)	1,595
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	$ (3,281)	$ (3,013)	$ 5,529