Condensed Consolidated Statements of Income and Retained Earnings - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Oct. 31, 2015	Oct. 31, 2014
Net Sales	$ 67,795	$ 66,044
Cost of Sales	(47,142)	(52,275)
Gross Profit	20,653	13,769
Selling, General and Administrative Expenses	(12,877)	(10,609)
Income from Operations	7,776	3,160
Other Income (Expense)
Interest Expense	(259)	(382)
Interest Income	3	3
Other, Net	20	84
Total Other Expense, Net	(236)	(295)
Income Before Income Taxes	7,540	2,865
Income Taxes	(2,117)	(745)
Net Income	5,423	2,120
Retained Earnings:
Balance at Beginning of Period	142,095	136,039
Cash Dividends Declared and Treasury Stock Issuances	(1,438)	(1,313)
Balance at End of Period	$ 146,080	$ 136,846
Net Income Per Share
Diluted (in dollars per share)	$ 0.75	$ 0.30
Average Shares Outstanding
Diluted (in shares)	7,063	7,016
Common Stock
Net Income Per Share
Basic Common (in dollars per share)	$ 0.82	$ 0.32
Average Shares Outstanding
Basic Common (in shares)	4,975	4,948
Dividends Declared Per Share (in dollars per share)	$ 0.2100	$ 0.2000
Common Class B
Net Income Per Share
Basic Common (in dollars per share)	$ 0.61	$ 0.24
Average Shares Outstanding
Basic Common (in shares)	2,037	2,009
Dividends Declared Per Share (in dollars per share)	$ 0.1575	$ 0.1500