Note 6 - Net Income Per Share (Tables)

9 Months Ended

May 31, 2014

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table Text Block]

	Thirteen weeks ended				Thirty-nine weeks ended
	May 31, 2014		May 25, 2013		May 31, 2014		May 25, 2013
Net income	$	30,944	$	28,722	$	91,053	$	86,124
Allocation of net income for Basic:
Common Stock	$	24,493	$	22,638	$	71,971	$	67,793
Class B Common Stock		6,127		5,647		17,962		16,880
Unvested participating shares		324		437		1,120		1,451
	$	30,944	$	28,722	$	91,053	$	86,124
Weighted average number of shares for Basic:
Common Stock		15,102		14,993		15,069		14,960
Class B Common Stock		4,722		4,675		4,701		4,656
Unvested participating shares		229		331		268		366
		20,053		19,999		20,038		19,982
Earnings per share for Basic:
Common Stock	$	1.62	$	1.51	$	4.78	$	4.53
Class B Common Stock	$	1.30	$	1.21	$	3.82	$	3.63

Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table Text Block]

	Thirteen weeks ended May 31, 2014							Thirty-nine weeks ended May 31, 2014
	Earnings to Common Shareholders			Common Shares		EPS		Earnings to Common Shareholders			Common Shares		EPS
As reported - Basic	$	24,493			15,102	$	1.62	$	71,971			15,069	$	4.78
Add: effect of dilutive potential common shares
Share-based awards		—			153				—			151
Class B Common Stock		6,127			4,722				17,962			4,701
Add: Undistributed earnings allocated to unvested participating shares		317			—				1,095			—
Less: Undistributed earnings reallocated to unvested participating shares		(300	)		—				(1,036	)		—
Diluted EPS – Common Stock	$	30,637			19,977	$	1.53	$	89,992			19,921	$	4.52

	Thirteen weeks ended May 25, 2013							Thirty-nine weeks ended May 25, 2013
	Earnings to Common Shareholders			Common Shares		EPS		Earnings to Common Shareholders			Common Shares		EPS
As reported - Basic	$	22,638			14,993	$	1.51	$	67,793			14,960	$	4.53
Add: effect of dilutive potential common shares
Share-based awards		—			152				—			135
Class B Common Stock		5,647			4,675				16,880			4,656
Add: Undistributed earnings allocated to unvested participating shares		426			—				1,415			—
Less: Undistributed earnings reallocated to unvested participating shares		(404	)		—				(1,341	)		—
Diluted EPS – Common Stock	$	28,307			19,820	$	1.43	$	84,747			19,751	$	4.29