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Earnings Per Share (Details) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Earnings Per Share Disclosure [Line Items]        
Accretion of discount on preferred stock       $ 0
Antidilutive shares excluded from EPS calculation 23,310 27,421    
Dividends on preferred stock 0 1,087,000 0 2,104,000
Stock Options [Member]
       
Earnings Per Share Disclosure [Line Items]        
Antidilutive shares excluded from EPS calculation 1,238 5,349    
Preferred stock Series A [Member]
       
Earnings Per Share Disclosure [Line Items]        
Unpaid cumulative dividends       3,500,000
Accretion of discount on preferred stock   200,000   300,000
Dividends on preferred stock   $ 1,000,000   $ 2,100,000