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Equity (Stock Repurchase Program) (Details) - USD ($)
 6 Months Ended
Jun. 30, 2015
Sep. 30, 2013
Stock Repurchase Program    
Repurchase of common stock, authorized amount   $ 50,000,000
Treasury stock, shares, acquired 44,235.000  
Treasury stock value acquired including acquisition costs $ 600,000  
Treasury stock acquired, average cost per share $ 12.66  
Available repurchase of common stock, authorized amount $ 28,500,000