CONSOLIDATED CONDENSED STATMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 23, 2016	Jan. 24, 2015	Jan. 23, 2016	Jan. 24, 2015
Sales	$ 420,170	$ 411,191	$ 809,699	$ 790,935
Cost of sales	307,444	300,065	591,487	577,006
Gross profit	112,726	111,126	218,212	213,929
Operating and administrative expense	95,243	92,471	186,581	181,459
Depreciation and amortization	6,060	5,994	12,018	11,897
Operating income	11,423	12,661	19,613	20,573
Interest expense	(1,125)	(1,138)	(2,252)	(2,272)
Interest income	565	611	1,128	1,226
Income before income taxes	10,863	12,134	18,489	19,527
Income taxes	4,579	5,531	7,775	9,046
Net income	$ 6,284	$ 6,603	$ 10,714	$ 10,481
Common Class A [Member]
Net income per share:
Basic (in dollars per share)	$ 0.50	$ 0.53	$ 0.85	$ 0.84
Diluted (in dollars per share)	0.44	0.47	0.76	0.74
Common Class B [Member]
Net income per share:
Basic (in dollars per share)	0.32	0.34	0.55	0.54
Diluted (in dollars per share)	$ 0.32	$ 0.34	$ 0.55	$ 0.54