13. Earnings Per Share

The Company computes earnings per share attributable to MYR Group Inc. using the treasury stock method. Under the treasury stock method, basic earnings per share attributable to MYR Group Inc. are computed by dividing net income available to stockholders by the weighted average number of common shares outstanding during the period, and diluted earnings per share are computed by dividing net income available to stockholders by the weighted average number of common shares outstanding during the period plus all potentially dilutive common stock equivalents, except in cases where the effect of the common stock equivalent would be anti-dilutive.

Net income attributable to MYR Group Inc. and the weighted average number of common shares used to compute basic and diluted earnings per share were as follows:


	Three months ended				Nine months ended
	September 30,				September 30,
(in thousands, except per share data)	2019		2018		2019		2018

Numerator:
Net income attributable to MYR Group Inc.	$	10,355	$	7,957	$	24,915	$	20,436

Denominator:
Weighted average common shares outstanding		16,614		16,492		16,576		16,423
Weighted average dilutive securities		100		138		116		157
Weighted average common shares outstanding, diluted		16,714		16,630		16,692		16,580

Income per common share attributable to MYR Group Inc.:
Basic	$	0.62	$	0.48	$	1.50	$	1.24
Diluted	$	0.62	$	0.48	$	1.49	$	1.23

For the three and nine months ended September 30, 2019 and 2018, certain common stock equivalents were excluded from the calculation of dilutive securities because their inclusion would either have been anti-dilutive or, for stock options, the exercise prices of those stock options were greater than the average market price of the Company’s common stock for the period. All of the Company’s unvested time-vested stock awards were included in the computation of weighted average dilutive securities.

The following table summarizes the shares of common stock underlying the Company’s unexercised stock options, unvested time-vested stock awards and unvested performance awards that were excluded from the calculation of dilutive securities:


	Three months ended		Nine months ended
	September 30,		September 30,
(in thousands)	2019	2018	2019	2018

Time-vested stock awards	—	1	—	1
Performance awards	30	2	73	68