Earnings per Share (Tables)

12 Months Ended

May 31, 2016

Earnings Per Share [Abstract]

Schedule of computations of basic and diluted earnings per share

The following table sets forth the computations of basic and diluted earnings per share:

	For the year ended May 31,
	2016		2015		2014
Basic earnings per share
Numerator:
Net income attributable to Mistras Group, Inc.	$	24,654	$	16,081	$	22,518
Denominator
Weighted average common shares outstanding	28,856		28,613		28,365
Basic earnings per share	$	0.85	$	0.56	$	0.79
Diluted earnings per share:
Numerator:
Net income attributable to Mistras Group, Inc.	$	24,654	$	16,081	$	22,518
Denominator
Weighted average common shares outstanding	28,856		28,613		28,365
Dilutive effect of stock options outstanding	712		719		775
Dilutive effect of restricted stock units outstanding	323		258		184
	29,891		29,590		29,324
Diluted earnings per share	$	0.82	$	0.54	$	0.77

Schedule of potential common shares that were excluded from the computation of diluted earnings per share

The following potential common shares were excluded from the computation of diluted earnings per share, as the effect would have been anti-dilutive:

	For the year ended May 31,
	2016	2015	2014
Potential common stock attributable to stock options outstanding	5	6	5
Potential common stock attributable to performance awards outstanding	24	1	121
Total	29	7	126