Quarterly Financial Information - Unaudited

12 Months Ended

Jan. 31, 2013

Notes To Financial Statements [Abstract]

Quarterly Financial Information [Text Block]

Quarterly Financial Information – Unaudited

A summary of quarterly financial information follows:

Quarter ended	April 30			July 31		October 31		January 31
Fiscal 2013
Total revenues	$	247,918		$	240,811	$	268,760	$	331,238
Gross profit	$	202,535		$	194,235	$	218,497	$	283,770
Operating income	$	32,822		$	19,907	$	37,809	$	71,095
Net income attributable to Mentor Graphics shareholders	$	28,182		$	18,167	$	30,641	$	61,746
Net income per share, basic (1)	$	0.26		$	0.17	$	0.27	$	0.50
Net income per share, diluted (1)	$	0.25		$	0.16	$	0.27	$	0.49
Quarter ended	April 30			July 31		October 31		January 31
Fiscal 2012
Total revenues	$	230,035		$	213,740	$	250,508	$	320,355
Gross profit	$	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

(1) We have reduced the numerator of our basic and diluted earnings per share calculation by $5,272 for the quarter ended January 31, 2013 for the accumulated adjustment of the noncontrolling interest with redemption feature to its calculated redemption value at January 31, 2013, recorded directly to retained earnings.