Weighted Average Shares Outstanding (Tables)

12 Months Ended

Dec. 31, 2011

Weighted Average Shares Outstanding [Abstract]

Schedule of Weighted Average Number of Shares

A reconciliation of the weighted average number of common shares outstanding used in the calculation of basic and diluted earnings per share follows:

	Weighted Average Common Shares Outstanding
	2011	2010	2009
Basic	55,214,586	55,259,732	53,879,976
Dilutive effect of:
Stock options	645,280	591,943	245,784
Restricted stock units	19,089	4,608	4,318
Non-Employee Director Deferred Stock Plan	52,927	68,904	76,348
Diluted	55,931,882	55,925,187	54,206,426