Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2015	Oct. 31, 2014
Net income	$ 13,889	$ 20,559	$ 33,996	$ 31,303
Other comprehensive income (loss), net of tax:
Change in unrealized gain (loss) on derivative instruments	89	(145)	469	(294)
Less: Reclassification adjustment for net income (loss) included in net income	497	(165)	518	(248)
Net change	(408)	20	(49)	(46)
Change in accumulated translation adjustment	(1,698)	(11,790)	(5,858)	(12,493)
Change in pension liability	(1)	(2)	(5)	(6)
Other comprehensive loss	(2,107)	(11,772)	(5,912)	(12,545)
Comprehensive income	11,782	8,787	28,084	18,758
Net loss attributable to noncontrolling interest	(790)	(471)	(2,010)	(1,348)
Change in accumulated translation adjustment attributable to the noncontrolling interest	(16)	3	26	8
Comprehensive loss attributable to the noncontrolling interest	(806)	(468)	(1,984)	(1,340)
Comprehensive income attributable to Mentor Graphics shareholders	$ 12,588	$ 9,255	$ 30,068	$ 20,098