Statements Of Stockholders' Equity - USD ($)	Class A voting Common Stock [Member]	Capital in Excess of Par Value [Member]	Deferred Directors' Compensation [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Total
Balances, shares at Sep. 30, 2012	16,863,004
Balances, Treasury shares at Sep. 30, 2013					(400,496)
Balances at Sep. 30, 2012	$ 280,938	$ 1,879,815	$ 2,676,160	$ 84,821,395	$ (5,806,162)	$ 83,852,146
Purchase of treasury stock					$ (1,214,638)	(1,214,638)
Purchase of treasury stock, shares					(84,412)
Issuance of treasury shares to ESOP		(33,812)			$ 342,262	$ 308,450
Issuance of treasury shares to ESOP, shares					21,814	21,814
Restricted stock awards		683,968				$ 683,968
Distribution of deferred directors' compensation		(82,547)	(297,154)		$ 394,687	14,986
Distribution of deferred directors' compensation, shares					24,722
Common shares to be issued to directors for services			377,520			377,520
Dividends declared				(2,326,995)		(2,326,995)
Net income				13,960,049		13,960,049
Balances, shares at Sep. 30, 2013	16,863,004
Balances, Treasury shares at Sep. 30, 2012					(362,620)
Balances at Sep. 30, 2013	$ 280,938	2,447,424	2,756,526	96,454,449	$ (6,283,851)	$ 95,655,486
Balances, Treasury shares at Sep. 30, 2014					(372,364)	(372,364)
Purchase of treasury stock					$ (122,044)	$ (122,044)
Purchase of treasury stock, shares					(7,444)
Issuance of treasury shares to ESOP		161,363			$ 179,762	$ 341,125
Issuance of treasury shares to ESOP, shares					11,428	11,428
Restricted stock awards		659,320				$ 659,320
Distribution of deferred directors' compensation		(406,764)			$ 367,966	(38,798)
Distribution of deferred directors' compensation, shares					24,148
Common shares to be issued to directors for services			353,825			353,825
Dividends declared				(2,661,723)		(2,661,723)
Net income				25,001,462		25,001,462
Balances, shares at Sep. 30, 2014	16,863,004
Balances, Treasury shares at Sep. 30, 2013					(400,496)
Balances at Sep. 30, 2014	$ 280,938	2,861,343	3,110,351	118,794,188	$ (5,858,167)	$ 119,188,653
Balances, Treasury shares at Sep. 30, 2015					(302,623)	(302,623)
Purchase of treasury stock					$ (242,313)	$ (242,313)
Purchase of treasury stock, shares					(12,719)
Issuance of treasury shares to ESOP		3,437			$ 181,676	$ 185,113
Issuance of treasury shares to ESOP, shares					11,455	11,455
Restricted stock awards		895,127				$ 895,127
Distribution of deferred directors' compensation		16,044	(328,415)		$ 352,359	39,988
Distribution of deferred directors' compensation, shares					22,372
Distribution of restricted stock to officers and directors		(782,832)			$ 766,301	(16,531)
Distribution of restricted stock to officers and directors, shares					48,633
Common shares to be issued to directors for services			302,353			302,353
Dividends declared				(2,669,056)		(2,669,056)
Net income				9,321,341		$ 9,321,341
Balances, shares at Sep. 30, 2015	16,863,004
Balances, Treasury shares at Sep. 30, 2014					(372,364)	(372,364)
Balances at Sep. 30, 2015	$ 280,938	$ 2,993,119	$ 3,084,289	$ 125,446,473	$ (4,800,144)	$ 127,004,675