15.Net Income per Common Share

Basic net income per common share is computed by dividing net income available to common stockholders by the weighted average number of common shares outstanding during each period. Diluted net income per common share is computed by dividing net income available to common stockholders, plus income attributable to dilutive shares and convertible common units, for the period by the weighted average number of common shares that would have been outstanding assuming the issuance of common shares for all potentially dilutive common shares outstanding during the reporting period.

The following is a reconciliation of the denominator of the basic net income per common share computation to the denominator of the diluted net income per common share computation.

	Three months ended
	March 31,
	2018	2017
Weighted average shares used for the basic net income per share computation	283,917,418	263,340,491
Incremental shares from share-based compensation	110,888	276,791
Weighted average partnership common units convertible to common shares that were dilutive	317,022	317,022

Weighted average shares used for diluted net income per share computation	284,345,328	263,934,304

Unvested shares from share-based compensation that were anti-dilutive	24,329	58,887

Weighted average partnership common units convertible to common shares that were anti-dilutive	54,227	88,182