Note 7 - Net Income Per Share (Tables)

9 Months Ended

May. 30, 2015

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 30,		May 31,		May 30,		May 31,
	2015		2014		2015		2014
Net income	$	32,499	$	30,944	$	95,358	$	91,053
Allocation of net income for Basic:
Common Stock	$	25,817	$	24,493	$	75,650	$	71,971
Class B Common Stock		6,483		6,127		18,954		17,962
Unvested participating shares		199		324		754		1,120
	$	32,499	$	30,944	$	95,358	$	91,053
Weighted average number of shares for Basic:
Common Stock		15,207		15,102		15,173		15,069
Class B Common Stock		4,773		4,722		4,752		4,701
Unvested participating shares		134		229		173		268
		20,114		20,053		20,098		20,038
Earnings per share for Basic:
Common Stock	$	1.70	$	1.62	$	4.99	$	4.78
Class B Common Stock	$	1.36	$	1.30	$	3.99	$	3.82

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

	Thirteen weeks							Thirty-nine weeks
	ended May 30, 2015							ended May 30, 2015
	Earnings							Earnings
	to Common			Common				to Common			Common
	Shareholders			Shares		EPS		Shareholders			Shares		EPS
As reported - Basic	$	25,817			15,207	$	1.70	$	75,650			15,173	$	4.99
Add: effect of dilutive potential common shares
Share-based awards		—			138				—			132
Class B Common Stock		6,483			4,773				18,954			4,752
Add: Undistributed earnings allocated to unvested participating shares		194			—				737			—
Less: Undistributed earnings reallocated tounvested participating shares		(184	)		—				(697	)		—
Diluted EPS – Common Stock	$	32,310			20,118	$	1.61	$	94,644			20,057	$	4.72

	Thirteen weeks							Thirty-nine weeks
	ended May 31, 2014							ended May 31, 2014
	Earnings							Earnings
	to Common			Common				to Common			Common
	Shareholders			Shares		EPS		Shareholders			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