Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2013
Net income	$ 13,769	$ 23,747	$ 10,744	$ 23,328
Other comprehensive income (loss), net of tax:
Change in unrealized loss on derivative instruments	(232)	(15)	(149)	(270)
Cash flow hedge reclassification adjustment for net loss included in net income	(238)	(23)	(83)	(267)
Cash flow hedges change net of reclassifications	6	8	(66)	(3)
Change in accumulated translation adjustment	(3,665)	(2,119)	(703)	(7,436)
Change in pension liability	(2)	(2)	(4)	(4)
Other comprehensive loss	(3,661)	(2,113)	(773)	(7,443)
Comprehensive income	10,108	21,634	9,971	15,885
Net loss attributable to noncontrolling interest	(403)	(235)	(877)	(859)
Change in accumulated translation adjustment attributable to the noncontrolling interest	15	5	5	48
Comprehensive loss attributable to the noncontrolling interest	(388)	(230)	(872)	(811)
Comprehensive income attributable to Mentor Graphics shareholders	$ 10,496	$ 21,864	$ 10,843	$ 16,696