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Earnings Per Share (Details Textual) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 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) 681,600 218,075 681,600 218,075
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) $ 27.74 $ 27.50 $ 27.74 $ 27.50