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Earnings per Share Data (Details Textual)
3 Months Ended 6 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2013
Mar. 31, 2012
Earnings per Share Data (Textual) [Abstract]        
Number of potentially anti-dilutive common stock equivalents (stock options) excluded 325,500 325,500 325,500 325,500