Note 7 - Employee Benefit Plans (Tables)

12 Months Ended

Aug. 29, 2015

Compensation and Retirement Disclosure [Abstract]

Schedule of Net Benefit Costs [Table Text Block]

	Pension Plans									SERP
	2015			2014			2013			2015		2014		2013
Service cost	$	192		$	172		$	178		$	821	$	615	$	547
Interest cost		294			328			268			1,133		942		912
Expected return on assets		(182	)		(183	)		(198	)		—		—		—
Amortization of prior service cost		62			62			62			368		368		368
Amortization of unrecognized loss		152			113			138			461		151		104
Other events		174			72			44			—		—		—
Net periodic benefit cost	$	692		$	564		$	492		$	2,783	$	2,076	$	1,931

Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan [Table Text Block]

	Pension Plans						SERP
	2015			2014			2015			2014
Change in benefit obligation:
Projected benefit obligation, beginning of year	$	8,755		$	7,954		$	21,284		$	18,110
Service cost		192			172			821			615
Interest cost		294			328			1,133			942
Amendments		263			—			—			—
Actuarial (gain) loss		(228	)		708			290			1,889
Benefits paid		(314	)		(198	)		(243	)		(272	)
Settlements		(483	)		(209	)		—			—
Projected benefit obligation, end of year	$	8,479		$	8,755		$	23,285		$	21,284
Change in plan assets:
Fair value of plan assets, beginning of year	$	5,008		$	4,939		$	—		$	—
Actual return on plan assets		153			154			—			—
Employer contributions		394			322			—			—
Benefits paid		(314	)		(198	)		—			—
Settlements		(484	)		(209	)		—			—
Fair value of plan assets, end of year	$	4,757		$	5,008		$	—		$	—
Funded status (net amount recognized):	$	(3,722	)	$	(3,747	)	$	(23,285	)	$	(21,284	)

Schedule of Amounts Recognized in Balance Sheet [Table Text Block]

	Pension Plans						SERP
	2015			2014			2015			2014
Deferred tax assets	$	988		$	1,097		$	1,975		$	2,193
Accrued liabilities	$	3,722		$	3,747		$	23,285		$	21,284
Accumulated other comprehensive loss	$	(1,538	)	$	(1,753	)	$	(3,181	)	$	(3,491	)

Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]

	Pension Plans						SERP
	2015			2014			2015			2014
Net actuarial loss	$	(1,199	)	$	(1,534	)	$	(2,918	)	$	(3,006	)
Unrecognized prior service cost		(339	)		(219	)		(263	)		(485	)
	$	(1,538	)	$	(1,753	)	$	(3,181	)	$	(3,491	)

Schedule of Assumptions Used [Table Text Block]

	Pension Plans						SERP
	2015			2014			2015			2014
Discount rate		3.8	%		3.6	%		4.1	%		3.8	%
Rate of compensation increase	N/A			N/A				5.0	%		5.0	%

Schedule of Assumptions Used in Calculating Net Periodic Service Cost [Table Text Block]

	Pension Plans									SERP
	2015			2014			2013			2015			2014			2013
Discount rate		3.6	%		4.3	%		3.3	%		3.8	%		4.6	%		3.6	%
Expected return on plan assets		3.9	%		4.0	%		4.0	%	N/A			N/A			N/A
Rate of compensation increase	N/A			N/A			N/A				5.0	%		5.0	%		5.0	%

Schedule of Expected Benefit Payments [Table Text Block]

	Pension Plans		SERP
2016	$	459	$	875
2017		307		879
2018		423		898
2019		818		950
2020		622		1,013
Thereafter		5,850		18,670
	$	8,479	$	23,285