Earnings Per Share

3 Months Ended

Mar. 31, 2012

Earnings Per Share [Abstract]

Earnings Per Share

EARNINGS PER SHARE

Earnings Per Share.  Basic income per share is computed based upon the weighted-average number of common shares outstanding, excluding unvested restricted stock.  Diluted income per share is computed based upon the weighted-average number of common shares outstanding, including the dilutive effect of common stock equivalents outstanding during the periods.  Potentially dilutive common stock equivalents primarily consist of employee stock options, unvested restricted stock, and restricted stock units (“Equity-based Incentive Awards”).

Potentially dilutive common shares from Equity-based Incentive Awards are determined by applying the treasury stock method to the assumed exercise of outstanding employee stock options, and the assumed vesting of outstanding unvested restricted stock and restricted stock units.  The following table presents the weighted-average number of common shares outstanding used in the calculation of basic and diluted income per share:

	Three Months Ended March 31,
	2012	2011
Weighted-average common shares outstanding - basic	44,367,499	35,182,811
Dilutive effect of Equity-based Incentive Awards	1,403,729	1,265,194
Weighted-average common shares outstanding - diluted	45,771,228	36,448,005
Anti-dilutive Equity-based Incentive Awards excluded from the computation of diluted income per share	7,000	7,760