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Stock-Based Compensation Plans (Tables)
 12 Months Ended
Aug. 27, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Annual Incentive Compensation [Table Text Block]
The following table shows the amount accrued each fiscal year for stock-based compensation under the annual incentive plan. The Human Resources Committee of the Board of Directors approved the awards of restricted stock to the officers on the dates shown.
 
August 27, 2016
 
August 29, 2015
 
August 30, 2014
Annual incentive accrual (in thousands)
$
1,467

 
$
454

 
$
2,600

Date of award
10/11/2016

 
10/13/2015

 
10/14/2014

Stock-based portion of annual incentive accrual (in thousands)
$
489

 
$
157

 
$
866

Restricted shares awarded
17,532

 
7,914

 
40,495

Shares repurchased for payroll taxes
(8,412
)
 
(3,511
)
 
(20,638
)
Restricted shares issued
9,120

 
4,403

 
19,857
Schedule of Long-Term Incentive Plans [Table Text Block]
The following table shows the amount accrued each fiscal year for stock-based compensation as a result of ROE targets being met. The Human Resources Committee of the Board of Directors approved the awards of restricted stock to the officers on the dates shown. We repurchase shares from employees who elect to pay their payroll tax via delivery of shares of common stock as opposed to cash.
 
August 27, 2016
 
August 29, 2015
 
August 30, 2014
LTIP accrual (in thousands)
$
318

 
$
360

 
$
540

LTIP plan year
2014-2016

 
2013-2015

 
2012-2014

Date of award
10/11/2016

 
10/13/2015

 
10/14/2014

Restricted shares awarded
11,419

 
18,156

 
25,529

Shares repurchased for payroll taxes
(5,539
)
 
(8,529
)
 
(13,011
)
Restricted shares issued
5,880

 
9,627

 
12,518
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]
Total stock-based compensation expense for the past three fiscal years consisted of the following components:
 
Year Ended
(In thousands)
August 27, 2016
 
August 29, 2015
 
August 30, 2014
Share awards:
 
 
 
 
 
Performance-based annual plan employee award expense
$
489

 
$
157

 
$
866

Performance-based LTIP employee award expense
318

 
360

 
540

Time-based employee award expense
1,583

 
2,060

 
1,472

Time-based directors award expense
743

 
412

 
410

Directors stock unit expense
149

 
108

 
98

Stock options
11

 
—

 
—

Total stock-based compensation
$
3,293

 
$
3,097

 
$
3,386
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
A summary of stock option activity for Fiscal 2016, 2015 and 2014 is as follows:
 
 
Year Ended
 
 
August 27, 2016
 
August 29, 2015
 
August 30, 2014
 
 
Shares
Price per Share
Wtd. Avg. Exercise Price/Share
 
Shares
Price per Share
Wtd. Avg. Exercise Price/Share
 
Shares
Price per Share
Wtd. Avg. Exercise Price/Share
Outstanding at beginning of year
 
167,394

$26 - $34

$
28.30

 
457,421

$26 - $36

$
30.38

 
664,994

$26 - $36

$
29.83

Options granted
 
10,000

$16 - $17

16.67

 
—

—

—

 
—

—

—

Options exercised
 
—

—

—

 
—

—

—

 
(77,833
)
$26 - $27

26.72

Options cancelled
 
(167,394
)
$26 - $34

28.30

 
(290,027
)
$26 - $36

31.58

 
(129,740
)
$26 - $35

29.75

Outstanding at end of year
 
10,000

$16 - $17

$
16.67

 
167,394

$26 - $34

$
28.30

 
457,421

$26 - $36

$
30.38

Exercisable at end of year
 
—

$
—

$
—

 
167,394

$26 - $34

$
28.30

 
457,421

$26 - $36

$
30.38

Vested and expected to vest at end of year
 
10,000

$16 - $17

$
16.67

 
167,394

$26 - $34

$
28.30

 
457,421

$26 - $36

$
30.38
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
The fair value of each option grant is estimated on the date of grant using the Black-Scholes option-pricing model with the following assumptions:
Valuation Assumptions(1)
Fiscal 2016
Expected dividend yield
2.40
%
Risk-free interest rate (2)
1.49
%
Expected life (in years) (3)
5

Expected volatility (4)
43.52
%
Weighted average fair value of options granted

$5.31

(1) Forfeitures are estimated based on historical experience.
(2) Risk-free interest rate is based on Treasury Securities constant maturity interest rate whose term is consistent with the expected life of our
stock options.
(3) Expected life of stock options is based on historical experience.
(4) Expected stock price volatility is based on historical experience over a term consistent with the expected life of our stock options.
Schedule of Share-based Compensation, Stock Options, Other Values [Table Text Block]
Other values related to options are as follows:
(In thousands)
Fiscal 2016
 
Fiscal 2015
 
Fiscal 2014
Aggregate intrinsic value of options exercised (1)
$
—

 
$
—

 
$
173

Net cash proceeds from the exercise of stock options
—

 
—

 
2,080

Actual income tax benefit realized from stock option exercises
—

 
—

 
63


(1) 
The amount by which the closing price of our stock on the date of exercise exceeded the exercise price.
Schedule of Nonvested Share Activity [Table Text Block]
A summary of share award activity for Fiscal 2016, 2015 and 2014 is as follows:
 
Year Ended
 
August 27, 2016
 
August 29, 2015
 
August 30, 2014
 
Shares
Weighted Average Grant Date
Fair Value
 
Shares
Weighted Average Grant Date
Fair Value
 
Shares
Weighted Average Grant Date
Fair Value
Beginning of year
163,420

$
20.83

 
198,523

$
18.98

 
190,962

$
12.46

Granted
240,270

19.72

 
165,624

21.70

 
138,345

27.44

Vested
(110,283
)
19.44

 
(198,693
)
19.71

 
(129,817
)
18.82

Canceled
(9,526
)
20.28

 
(2,034
)
20.58

 
(967
)
18.44

End of year
283,881

$
20.45

 
163,420

$
20.83

 
198,523

$
18.98