Basic earnings per common share are computed by dividing income allocated to common stockholders by the weighted-average number of common shares outstanding during each period. The computation of diluted earnings per common share considers the number of shares issuable upon the assumed exercise of outstanding common stock options. Antidilutive common shares are not included in the calculation of diluted earnings per common share. For the three months ended March 31, 2020 and 2019, shares deemed to be antidilutive, and thus excluded from the computation of earnings per common share, were 269,000 and 396,000, respectively.

The table below shows earnings per common share and diluted earnings per common share, and reconciles the numerator and denominator of both earnings per common share calculations.


	Three Months Ended March 31,
	2020		2019
	(In thousands, except per share amounts)
Earnings per common share:
Net earnings	$	37,980	$	51,642
Less: Net earnings allocated to restricted stock		83		141

Net earnings allocated to common shareholders	$	37,897	$	51,501

Weighted average shares outstanding		139,107		139,615
Basic earnings per common share	$	0.27	$	0.37


Diluted earnings per common share:
Net income allocated to common shareholders		37,897		51,501

Weighted average shares outstanding		139,107		139,615
Incremental shares from assumed exercise of outstanding options		209		216

Diluted weighted average shares outstanding		139,316		139,831
Diluted earnings per common share	$	0.27	$	0.37