Earnings Per Share Data - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Earnings Per Share [Abstract]
Number of potentially anti-dilutive common stock equivalents (stock options) excluded	345,500	345,500	345,500	345,500