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Earnings Per Share (Anti-dilutive Schedule of Diluted Earnings Per Share) (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Earnings Per Share        
Anti-dilutive stock options not included above 3,297 84,000 3,050 117,561