Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Apr. 30, 2014	Apr. 30, 2013
Revenues:
System and software	$ 148,229	$ 123,284
Service and support	103,922	103,231
Total revenues	252,151	226,515
Cost of revenues:
System and software	26,971	8,899
Service and support	29,111	30,075
Amortization of purchased technology	1,361	1,207
Total cost of revenues	57,443	40,181
Gross profit	194,708	186,334
Operating expenses:
Research and development	84,451	79,717
Marketing and selling	84,634	79,107
General and administration	17,682	16,337
Equity in earnings of Frontline	(1,379)	(397)
Amortization of intangible assets	1,750	1,654
Special charges	5,926	4,023
Total operating expenses	193,064	180,441
Operating income	1,644	5,893
Other income (expense), net	(258)	(959)
Interest expense	(4,585)	(4,785)
Income (loss) before income tax	(3,199)	149
Income tax expense (benefit)	(174)	568
Net loss	(3,025)	(419)
Net loss attributable to noncontrolling interest	(474)	(624)
Net income (loss) attributable to Mentor Graphics shareholders	$ (2,551)	$ 205
Net income (loss) per share:
Basic	$ (0.02)	$ 0.01
Diluted	$ (0.02)	$ 0.01
Weighted average number of shares outstanding:
Basic	114,935	112,711
Diluted	114,935	115,751
Cash dividends declared per common share	$ 0.050	$ 0.045