Common and Common Equivalent Shares

6 Months Ended

Jun. 30, 2021

8. Common and Common Equivalent Shares:

Basic net income per common share is calculated by dividing net income by the weighted average number of common shares outstanding during the period. Diluted net income per common share is calculated by dividing net income by the weighted average number of common and potential common shares outstanding during the period. Potential common shares consist of outstanding restricted stock and stock options and is calculated using the treasury stock method.

The calculation of shares used in the basic and diluted net income per common share calculation for the three and six months ended June 30, 2021 and 2020 is as follows (in thousands):


	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
Weighted average number of common shares outstanding		84,912		83,490		84,660		83,061
Weighted average number of dilutive common share equivalents		1,021		254		993		—
Weighted average number of common and common equivalent shares outstanding (a)		85,933		83,744		85,653		83,061
Antidilutive securities not included in the diluted net income per common share calculation		13		1,335		15		1,092

(a)

Due to a loss from continuing operations for the six months ended June 30, 2020, no incremental shares are included because the effect would be antidilutive.