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Earnings per Common Share (Details)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Potential common shares excluded from diluted earnings per common share        
Shares excluded from diluted earnings per common share 5,545 34,412 5,622 47,472
Shares related to preferred stock [Member]
       
Potential common shares excluded from diluted earnings per common share        
Shares excluded from diluted earnings per common share   29,283   42,327
Stock options [Member]
       
Potential common shares excluded from diluted earnings per common share        
Shares excluded from diluted earnings per common share 5,045 5,101 5,200 5,117
Shares related to restricted stock and stock units [Member]
       
Potential common shares excluded from diluted earnings per common share        
Shares excluded from diluted earnings per common share 500 28 422 28