Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2012

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

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