Net Income Per Common Share

6 Months Ended

Jun. 30, 2011

Net Income Per Common Share [Abstract]

Net Income Per Common Share

12.    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 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		Six months ended
	June 30, 2011	June 30, 2010	June 30, 2011	June 30, 2010
Weighted average shares used for the basic net income per share computation	125,999,323	103,612,454	122,547,027	103,653,250
Incremental shares from share-based compensation	202,724	153,374	144,391	125,359
Adjusted weighted average shares used for diluted net income per share computation	126,202,047	103,765,828	122,691,418	103,778,609
Unvested shares from share-based compensation that were anti-dilutive	12,600	87,000	12,600	87,200