Net Income Per Share (Tables)

12 Months Ended

Jan. 31, 2016

Earnings Per Share [Abstract]

Computation of basic and diluted net income (loss) per share

The following provides the computation of basic and diluted net income per share:

Year ended January 31,	2016		2015		2014
Net income attributable to Mentor Graphics shareholders	$	96,277	$	147,139	$	155,258
Adjustment to redemption value of noncontrolling interest with redemption feature	258		121		(4,486		)
Adjusted net income attributable to Mentor Graphics shareholders	$	96,535	$	147,260	$	150,772
Weighted average common shares used to calculate basic net income per share	116,701		114,635		113,671
Employee stock options, restricted stock units and employee stock purchase plan	2,562		2,443		3,031
Weighted average common and potential common shares used to calculate diluted net income per share	119,263		117,078		116,702
Net income per share attributable to Mentor Graphics shareholders:
Basic net income per share	$	0.83	$	1.28	$	1.33
Diluted net income per share	$	0.81	$	1.26	$	1.29

Adjustments to Net Income excluded from the computation of diluted EPS

The following details adjustments to net income excluded from the computation of diluted net income:

Year ended January 31,	2016		2015		2014
Adjustment for convertible debt interest, net of tax to be forfeited upon conversion of 4.00% Debentures	$	2,074	$	2,075	$	2,075

Schedule of antidilutive securities excluded from computation of EPS

The following details shares excluded from the computation of diluted net income:

Year ended January 31,	2016	2015	2014
Shares of common stock for restricted stock units	—	18	566
Shares of common stock for stock options	—	14	518
Shares of common stock for ESPP purchase rights	—	887	111
Shares of common stock for convertible debt	2,046	612	—
Total anti-dilutive shares excluded	2,046	1,531	1,195