Consolidated Statements of Stockholders Equity and Other Comprehensive Income Statement (USD $) In Thousands, except Share data	Total	Common & Class B Stock	Additional Paid-in Capital	Retained Earnings	Restricted Unearned Stock Compensation	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
Total, Beginning of Period at Jul. 31, 2009	$ 89,563	$ 971	$ 23,366	$ 111,593	$ (383)	$ (41,722)	$ (4,262)
Treasury Stock, Beginning of Period (in shares) at Jul. 31, 2009						(2,607,262)
Common & Class B Stock, Beginning of Period (in shares) at Jul. 31, 2009		9,715,372
Net Income	9,458	0	0	9,458	0	0	0
Cumulative Translation Adjustments	210	0	0	0	0	0	210
Unrealized gain (loss) on marketable securities	27	0	0	0	0	0	27
Unrecognized actuarial gain (loss), prior service cost and transition liability	(726)	0	0	0	0	0	(726)
Total Comprehensive Income	8,969
Dividends Declared	(4,041)	0	0	(4,041)	0	0	0
Purchases of Treasury Stock	(5,988)	0	0	0	0	(5,988)	0
Purchases of Treasury Stock (in shares)						(288,243)
Issuance of Stock Under Long-Term Incentive Plans	1,362	17	1,319	(93)	(78)	197	0
Issuance of Stock Under Long-Term Incentive Plans (in shares)		168,767				12,000
Share-based Compensation	419	0	419	0	0	0	0
Amortization of Restricted Stock	305	0	0	0	305	0	0
Total, End of Period at Jul. 31, 2010	90,589	988	25,104	116,917	(156)	(47,513)	(4,751)
Treasury Stock, End of Period (in shares) at Jul. 31, 2010						(2,883,505)
Common & Class B Stock, End of Period (in shares) at Jul. 31, 2010		9,884,139
Net Income	9,051	0	0	9,051	0	0	0
Cumulative Translation Adjustments	307	0	0	0	0	0	307
Unrealized gain (loss) on marketable securities	3	0	0	0	0	0	3
Unrecognized actuarial gain (loss), prior service cost and transition liability	(4)	0	0	0	0	0	(4)
Total Comprehensive Income	9,357
Dividends Declared	(4,305)	0	0	(4,305)	0	0	0
Purchases of Treasury Stock	(2,407)	0	0	0	0	(2,407)	0
Purchases of Treasury Stock (in shares)						(117,123)
Issuance of Stock Under Long-Term Incentive Plans	1,069	24	3,741	(275)	(2,917)	496	0
Issuance of Stock Under Long-Term Incentive Plans (in shares)		239,044				33,500
Share-based Compensation	368	0	368	0	0	0	0
Amortization of Restricted Stock	627	0	0	0	627	0	0
Total, End of Period at Jul. 31, 2011	95,298	1,012	29,213	121,388	(2,446)	(49,424)	(4,445)
Treasury Stock, End of Period (in shares) at Jul. 31, 2011						(2,967,128)
Common & Class B Stock, End of Period (in shares) at Jul. 31, 2011		10,123,183
Net Income	6,098	0	0	6,098	0	0	0
Cumulative Translation Adjustments	(226)	0	0	0	0	0	(226)
Unrealized gain (loss) on marketable securities	1	0	0	0	0	0	1
Unrecognized actuarial gain (loss), prior service cost and transition liability	(6,276)	0	0	0	0	0	(6,276)
Total Comprehensive Income	(403)
Dividends Declared	(4,511)	0	0	(4,511)	0	0	0
Purchases of Treasury Stock	(6,247)	0	0	0	0	(6,247)	0
Purchases of Treasury Stock (in shares)						(296,427)
Issuance of Stock Under Long-Term Incentive Plans	353	4	448	(74)	(488)	463	0
Issuance of Stock Under Long-Term Incentive Plans (in shares)		37,917				27,250
Share-based Compensation	98	0	98	0	0	0	0
Amortization of Restricted Stock	720	0	0	0	720	0	0
Total, End of Period at Jul. 31, 2012	$ 85,308	$ 1,016	$ 29,759	$ 122,901	$ (2,214)	$ (55,208)	$ (10,946)
Treasury Stock, End of Period (in shares) at Jul. 31, 2012						(3,236,305)
Common & Class B Stock, End of Period (in shares) at Jul. 31, 2012		10,161,100