Condensed Consolidated Statements of Stockholders' Equity (USD $)	Total	Class A voting Common Stock	Capital in Excess of Par Value	Deferred Directors' Compensation	Retained Earnings	Treasury Stock
Balance at Sep. 30, 2009	$ 64,122,343	$ 140,524	$ 1,922,053	$ 1,862,499	$ 64,507,547	$ (4,310,280)
Balance, shares at Sep. 30, 2009		8,431,502				(119,866)
Net income	8,383,244				8,383,244
Dividends ($.21 per share)	(1,745,444)				(1,745,444)
Increase in deferred directors' compensation charged to expense	319,151			319,151
Balance at Jun. 30, 2010	71,079,294	140,524	1,922,053	2,181,650	71,145,347	(4,310,280)
Balance, shares at Jun. 30, 2010		8,431,502				(119,866)
Balance at Sep. 30, 2010	73,581,996	140,524	1,816,365	2,222,127	73,599,733	(4,196,753)
Balance, shares at Sep. 30, 2010		8,431,502				(120,560)
Purchase of treasury stock	(1,851,290)					(1,851,290)
Purchase of treasury stock, shares						(65,481)
Restricted stock awards	105,664		105,664
Net income	5,849,531				5,849,531
Dividends ($.21 per share)	(1,743,075)				(1,743,075)
Increase in deferred directors' compensation charged to expense	330,332			330,332
Balance at Jun. 30, 2011	$ 76,273,158	$ 140,524	$ 1,922,029	$ 2,552,459	$ 77,706,189	$ (6,048,043)
Balance, shares at Jun. 30, 2011		8,431,502				(186,041)