Earnings Per Share (Details)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Reconciliation between basic and diluted earnings per share
Weighted average number of common shares outstanding	32,000,000	31,500,000
Dilutive impact of stock based compensation	311,864	476,464
Weighted average number of common and common equivalent shares outstanding for the period	32,300,000	32,000,000
Number of common shares outstanding at the end of the period	31,891,418	31,466,023
Weighted average anti-dilutive shares excluded from the computation of diluted earnings per share	591,028	122,822