Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2015	Jul. 31, 2014
Net income	$ 30,610	$ 13,769	$ 20,107	$ 10,744
Other comprehensive income (loss), net of tax:
Change in unrealized gain (loss) on derivative instruments	540	(232)	380	(149)
Less: Reclassification adjustment for net income (loss) included in net income	120	(238)	21	(83)
Net change	420	6	359	(66)
Change in accumulated translation adjustment	(4,777)	(3,665)	(4,160)	(703)
Change in pension liability	(2)	(2)	(4)	(4)
Other comprehensive loss	(4,359)	(3,661)	(3,805)	(773)
Comprehensive income	26,251	10,108	16,302	9,971
Net loss attributable to noncontrolling interest	(602)	(403)	(1,220)	(877)
Change in accumulated translation adjustment attributable to the noncontrolling interest	(8)	15	42	5
Comprehensive loss attributable to the noncontrolling interest	(610)	(388)	(1,178)	(872)
Comprehensive income attributable to Mentor Graphics shareholders	$ 26,861	$ 10,496	$ 17,480	$ 10,843