Basic earnings per share was computed by dividing net income attributable to SBA Communications Corporation by the weighted-average number of shares of Common Stock outstanding for each respective period. Diluted earnings per share was calculated by dividing net income attributable to SBA Communications Corporation by the weighted-average number of shares of Common Stock outstanding adjusted for any dilutive Common Stock equivalents, including unvested restricted stock and shares issuable upon exercise of stock options as determined under the “Treasury Stock” method.

The following table sets forth basic and diluted net income per common share attributable to common shareholders for the years ended December 31, 2019, 2018, and 2017 (in thousands, except per share data):


	For the year ended December 31,
	2019		2018		2017
Numerator:
Net income attributable to SBA
Communications Corporation	$	146,991	$	47,451	$	103,654
Denominator:
Basic weighted-average shares outstanding		112,809		114,909		119,860
Dilutive impact of stock options and restricted shares		1,884		1,606		1,162
Diluted weighted-average shares outstanding		114,693		116,515		121,022
Net income per common share attributable to SBA
Communications Corporation:
Basic	$	1.30	$	0.41	$	0.86
Diluted	$	1.28	$	0.41	$	0.86

For the year ended December 31, 2019, the diluted weighted average number of common shares outstanding excluded an additional 19,533 shares issuable upon exercise of the Company’s stock options because the impact would be anti-dilutive.

For the year ended December 31, 2018, the diluted weighted average number of common shares outstanding excluded an additional 0.8 million shares issuable upon exercise of the Company’s stock options because the impact would be anti-dilutive.