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Earnings Per Share (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Earnings (Loss) Per Share [Abstract]        
Shares of common stock excluded from computation of diluted earnings per share (in shares) 130,000 90,000 130,000 90,000