Condensed Consolidated Statements of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 30, 2014	Apr. 30, 2013
Net loss	$ (3,025)	$ (419)
Other comprehensive income (loss), net of tax:
Change in unrealized gain (loss) on derivative instruments	83	(255)
Cash flow hedge reclassification adjustment for net gain (loss) included in net loss	155	(244)
Cash flow hedges change net of reclassifications	(72)	(11)
Change in accumulated translation adjustment	2,962	(5,317)
Change in pension liability	(2)	(2)
Other comprehensive income (loss)	2,888	(5,330)
Comprehensive loss	(137)	(5,749)
Net loss attributable to noncontrolling interest	(474)	(624)
Change in accumulated translation adjustment attributable to the noncontrolling interest	(10)	43
Comprehensive loss attributable to the noncontrolling interest	(484)	(581)
Comprehensive income (loss) attributable to Mentor Graphics shareholders	$ 347	$ (5,168)