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Earnings per Share and Dividends per Share	9 Months Ended
Earnings per Share and Dividends per Share	Jun. 30, 2015
Text Block [Abstract]
Earnings per Share and Dividends per Share	(6) Earnings per Share and Dividends per Share Basic earnings per share is determined by dividing net earnings by the weighted average number of shares of common stock outstanding, while diluted earnings per share is determined by dividing net earnings by the weighted average number of shares of common stock outstanding adjusted for the dilutive effect of common stock equivalents. All common stock equivalents were dilutive and therefore included in the diluted earnings per share calculation for the three and nine months ended June 30, 2015. Quarterly cash dividends of $0.05, $0.06 and $0.06 per share, respectively, were paid on December 8, 2014 to shareholders of record as of November 14, 2014; on March 9, 2015 to shareholders of record as of February 13, 2015; and on June 12, 2015 to shareholders of record as of May 20, 2015. A quarterly cash dividend of $0.06 per share will be paid on September 10, 2015 to shareholders of record as of August 18, 2015.