Condensed Consolidated Statements of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
Net income (loss)	$ (419)	$ 27,530
Other comprehensive income (loss), net of tax:
Change in unrealized gain (loss) on derivative instruments	(255)	800
Cash flow hedge reclassification adjustment for net loss included in net income	(244)	347
Cash flow hedges change net of reclassifications	(11)	453
Change in accumulated translation adjustment	(5,317)	(781)
Change in pension liability	(2)	(3)
Comprehensive income (loss)	(5,749)	27,199
Net loss attributable to noncontrolling interest	(624)	(652)
Change in accumulated translation adjustment	43	(21)
Less: comprehensive loss attributable to the noncontrolling interest	(581)	(673)
Comprehensive income (loss) attributable to Mentor	$ (5,168)	$ 27,872