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Earnings Per Share (Details Textual) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 330,200 773,150 330,200 773,150
Antidilutive Securities [Member]
       
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Weighted Average Price Of Antidilutive Securities Excluded From Computation Of Earnings Per Share (in dollars per share) $ 28.50 $ 24.99 $ 28.50 $ 24.99