Quarterly Financial Information - Unaudited (Tables)

12 Months Ended

Jan. 31, 2012

Summary of Quarterly Financial Information

A summary of quarterly financial information follows:

Quarter ended	April 30			July 31			October 31		January 31
Fiscal 2012
Total revenues	$	230,035		$	213,740		$	250,508	$	320,355
Gross margin	$	185,390		$	169,848		$	210,262	$	275,680
Operating income	$	16,173		$	4,844		$	25,405	$	65,770
Net income (loss) attributable to Mentor Graphics shareholders	$	(2,353	)	$	4,334		$	24,071	$	57,820
Net income (loss) per share, basic	$	(0.02	)	$	0.04		$	0.22	$	0.53
Net income (loss) per share, diluted	$	(0.02	)	$	0.04		$	0.22	$	0.52
Quarter ended	April 30			July 31			October 31		January 31
Fiscal 2011
Total revenues	$	180,577		$	187,934		$	238,937	$	307,305
Gross margin	$	147,198		$	152,764		$	195,947	$	262,596
Operating income (loss)	$	(14,994	)	$	(10,491	)	$	20,641	$	57,383
Net income (loss) attributable to Mentor Graphics shareholders	$	(23,025	)	$	(14,247	)	$	15,257	$	50,599
Net income (loss) per share, basic	$	(0.22	)	$	(0.13	)	$	0.14	$	0.46
Net income (loss) per share, diluted	$	(0.22	)	$	(0.13	)	$	0.14	$	0.45