Note 6 - Net Income Per Share (Tables)

6 Months Ended

Mar. 01, 2014

Earnings Per Share [Abstract]

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

	Thirteen weeks ended				Twenty-six weeks ended
	March 1, 2014		February 23, 2013		March 1, 2014		February 23, 2013
Net income	$	25,647	$	26,642	$	60,109	$	57,402
Allocation of net income for Basic:
Common Stock	$	20,267	$	20,963	$	47,479	$	45,155
Class B Common Stock		5,041		5,209		11,836		11,233
Unvested participating shares		339		470		794		1,014
	$	25,647	$	26,642	$	60,109	$	57,402
Weighted average number of shares for Basic:
Common Stock		15,077		14,962		15,053		14,943
Class B Common Stock		4,687		4,647		4,690		4,647
Unvested participating shares		288		383		288		383
		20,052		19,992		20,031		19,973
Earnings per share for Basic:
Common Stock	$	1.34	$	1.40	$	3.15	$	3.02
Class B Common Stock	$	1.08	$	1.12	$	2.52	$	2.42

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

	Thirteen weeks ended March 1, 2014							Twenty-six weeks ended March 1, 2014
	Earnings to Common Shareholders			Common Shares		EPS		Earnings to Common Shareholders			Common Shares		EPS
As reported - Basic	$	20,267			15,077	$	1.34	$	47,479			15,053	$	3.15
Add: effect of dilutive potential common shares
Share-based awards		—			160				—			154
Class B Common Stock		5,041			4,687				11,836			4,690
Add: Undistributed earnings allocated to unvested participating shares		329			—				776			—
Less: Undistributed earnings reallocated to unvested participating shares		(311	)		—				(734	)		—
Diluted EPS – Common Stock	$	25,326			19,924	$	1.27	$	59,357			19,897	$	2.98

	Thirteen weeks ended February 23, 2013							Twenty-six weeks ended February 23, 2013
	Earnings to Common Shareholders			Common Shares		EPS		Earnings to Common Shareholders			Common Shares		EPS
As reported - Basic	$	20,963			14,962	$	1.40	$	45,155			14,943	$	3.02
Add: effect of dilutive potential common shares
Share-based awards		—			138				—			124
Class B Common Stock		5,209			4,647				11,233			4,647
Add: Undistributed earnings allocated to unvested participating shares		457			—				989			—
Less: Undistributed earnings reallocated to unvested participating shares		(433	)		—				(937	)		—
Diluted EPS – Common Stock	$	26,196			19,747	$	1.33	$	56,440			19,714	$	2.86