Basic earnings per common unit is computed using the two-class method by dividing net income available for common unitholders by the weighted average number of OP Units outstanding during the period. All outstanding unvested restricted unit awards contain rights to non-forfeitable distributions and participate in undistributed earnings with common unitholders and, accordingly, are considered participating securities that are included in the two-class method of computing basic earnings per common unit. Diluted earnings per common unit reflects the potential dilution that could occur if securities or other contracts to issue OP Units were exercised or converted into OP Units. Both the unvested restricted unit awards and other potentially dilutive common units, and the related impact to earnings, are considered when calculating earnings per common unit on a diluted basis with diluted earnings per common unit being the more dilutive of the treasury stock or two-class methods.

For the years ended December 31, 2021, 2020 and 2019, MAALP’s diluted earnings per common unit was computed using the treasury stock method as presented below (dollars and units in thousands, except per unit amounts):


Calculation of Earnings per common unit – basic	2021			2020			2019
Net income	$	550,702		$	264,015		$	366,618
Net income attributable to noncontrolling interests		—			—			(136	)
Unvested restricted units (allocation of earnings)		(539	)		(338	)		(519	)
Preferred unit distributions		(3,688	)		(3,688	)		(3,688	)
Net income available for MAALP common unitholders, adjusted	$	546,475		$	259,989		$	362,275

Weighted average common units – basic		118,400			118,248			117,944
Earnings per common unit – basic	$	4.62		$	2.20		$	3.07

Calculation of Earnings per common unit – diluted
Net income	$	550,702		$	264,015		$	366,618
Net income attributable to noncontrolling interests		—			—			(136	)
Preferred unit distributions		(3,688	)		(3,688	)		(3,688	)
Net income available for MAALP common unitholders, adjusted	$	547,014		$	260,327		$	362,794

Weighted average common units – basic		118,400			118,248			117,944
Effect of dilutive securities		322			312			259
Weighted average common units – diluted		118,722			118,560			118,203
Earnings per common unit – diluted	$	4.61		$	2.20		$	3.07