Note 6 - Net Income Per Share (Tables)

3 Months Ended

Nov. 30, 2013

Earnings Per Share [Abstract]

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

	Thirteen weeks ended
	November 30, 2013		November 24, 2012
Net income available to shareholders	$	34,462	$	30,760
Allocation of net income for Basic:
Common Stock	$	27,208	$	24,191
Class B Common Stock		6,798		6,025
Unvested participating shares		456		544
	$	34,462	$	30,760
Weighted average number of shares for Basic:
Common Stock		15,029		14,925
Class B Common Stock		4,693		4,647
Unvested participating shares		288		383
		20,010		19,955
Earnings per share for Basic:
Common Stock	$	1.81	$	1.62
Class B Common Stock	$	1.45	$	1.30

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

	Thirteen weeks ended November 30, 2013							Thirteen weeks ended November 24, 2012
	Earnings to Common shareholders			Common Shares		EPS		Earnings to Common shareholders			Common Shares		EPS
As reported - Basic	$	27,208			15,029	$	1.81	$	24,191			14,925	$	1.62
Add: effect of dilutive potential common shares
Share-Based Awards		—			169				—			121
Class B Common Stock		6,798			4,693				6,025			4,647
Add: Undistributed earnings allocated to unvested participating shares		447			—				531			—
Less: Undistributed earnings reallocated to unvested participating shares		(422	)		—				(503	)		—
Diluted EPS – Common Stock		34,031			19,891	$	1.71		30,244			19,693	$	1.54