CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member] Common Class A [Member]	Common Stock [Member] Common Class B [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock [Member]
Balance (in shares) at Jul. 28, 2018		10,575	4,304			496
Balance at Jul. 28, 2018	$ 303,145	$ 61,678	$ 699	$ 258,104	$ (8,185)	$ (9,151)
Net income	13,839			13,839
Other comprehensive income, net of tax	204				204
Dividends	(6,435)			(6,435)
Treasury stock purchases (in shares)						28
Restricted shares forfeited	(729)					$ (729)
Restricted shares forfeited (in shares)		(9)
Restricted shares forfeited	(127)	$ (127)
Share-based compensation expense (in shares)		8
Share-based compensation expense	1,643	$ 1,643
Balance (in shares) at Jan. 26, 2019		10,574	4,304			524
Balance at Jan. 26, 2019	311,540	$ 63,194	$ 699	265,508	(7,981)	$ (9,880)
Balance (in shares) at Oct. 27, 2018		10,583	4,304			518
Balance at Oct. 27, 2018	306,550	$ 62,499	$ 699	261,151	(8,083)	$ (9,716)
Net income	7,571			7,571
Other comprehensive income, net of tax	102				102
Dividends	(3,214)			(3,214)
Treasury stock purchases (in shares)						6
Restricted shares forfeited	(164)					$ (164)
Restricted shares forfeited (in shares)		(9)
Restricted shares forfeited	(127)	$ (127)
Share-based compensation expense (in shares)		0
Share-based compensation expense	822	$ 822
Balance (in shares) at Jan. 26, 2019		10,574	4,304			524
Balance at Jan. 26, 2019	311,540	$ 63,194	$ 699	265,508	(7,981)	$ (9,880)
Balance (in shares) at Jul. 27, 2019		10,593	4,294			502
Balance at Jul. 27, 2019	318,672	$ 65,114	$ 697	270,753	(8,342)	$ (9,550)
Net income	4,572			4,572
Other comprehensive income, net of tax	370				370
Dividends	(6,438)			(6,438)
Treasury stock purchases (in shares)						11
Restricted shares forfeited	(249)					$ (249)
Restricted shares forfeited (in shares)		(9)
Restricted shares forfeited	(180)	$ (180)
Share-based compensation expense (in shares)		2
Share-based compensation expense	1,721	$ 1,721
Balance (in shares) at Jan. 25, 2020		10,586	4,294			513
Balance at Jan. 25, 2020	321,982	$ 66,655	$ 697	272,401	(7,972)	$ (9,799)
Balance (in shares) at Oct. 26, 2019		10,593	4,294			503
Balance at Oct. 26, 2019	322,447	$ 65,947	$ 697	273,614	(8,241)	$ (9,570)
Net income	2,005			2,005
Other comprehensive income, net of tax	269				269
Dividends	(3,218)			(3,218)
Treasury stock purchases (in shares)						10
Restricted shares forfeited	(229)					$ (229)
Restricted shares forfeited (in shares)		(7)
Restricted shares forfeited	(150)	$ (150)
Share-based compensation expense (in shares)		0
Share-based compensation expense	858	$ 858
Balance (in shares) at Jan. 25, 2020		10,586	4,294			513
Balance at Jan. 25, 2020	$ 321,982	$ 66,655	$ 697	$ 272,401	$ (7,972)	$ (9,799)