CONSOLIDATED CONDENSED STATMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jan. 24, 2015	Jan. 25, 2014	Jan. 24, 2015	Jan. 25, 2014
Sales	$ 411,191	$ 392,241	$ 790,935	$ 749,287
Cost of sales	300,065	286,883	577,006	550,223
Gross profit	111,126	105,358	213,929	199,064
Operating and administrative expense	92,471	94,085	181,459	176,437
Depreciation and amortization	5,994	5,416	11,897	10,521
Operating income	12,661	5,857	20,573	12,106
Interest expense	(1,138)	(1,016)	(2,272)	(1,756)
Interest income	611	653	1,226	1,349
Income before income taxes	12,134	5,494	19,527	11,699
Income taxes	5,531	2,676	9,046	15,711
Net income (loss)	$ 6,603	$ 2,818	$ 10,481	$ (4,012)
Common Class A [Member]
Net income (loss) per share:
Basic (in dollars per share)	$ 0.53	$ 0.23	$ 0.84	$ (0.32)
Diluted (in dollars per share)	$ 0.47	$ 0.20	$ 0.74	$ (0.32)
Common Class B [Member]
Net income (loss) per share:
Basic (in dollars per share)	$ 0.34	$ 0.15	$ 0.54	$ (0.21)
Diluted (in dollars per share)	$ 0.34	$ 0.15	$ 0.54	$ (0.21)