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Stock Ownership Plans (Tables)
 12 Months Ended
Sep. 25, 2016
Stock Options [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
A summary of stock option activity is as follows:
(Thousands of Shares)
2016

 
2015

 
2014

 
 
 
 
 
 
Under option, beginning of year
1,871

 
2,333

 
2,769

Granted
—

 
—

 
15

Exercised
(74
)
 
(289
)
 
(342
)
Canceled
(99
)
 
(173
)
 
(109
)
Under option, end of year
1,698

 
1,871

 
2,333

Exercisable, end of year
1,692

 
1,840

 
1,786
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value [Table Text Block]
Weighted average prices of stock options are as follows:
(Dollars)
2016

 
2015

 
2014

 
 
 
 
 
 
Granted
—

 
—

 
2.99

Exercised
1.17

 
1.27

 
2.01

Cancelled
8.78

 
5.02

 
10.98

Under option, end of year
2.42

 
2.71

 
2.70
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
The following assumptions were used to estimate the fair value of option awards:
 
 
 
 
 
2014

 
 
 
 
 
 
Volatility (Percent)
 
 
 
 
91

Risk-free interest rate (Percent)
 
 
 
 
1.24

Expected term (Years)
 
 
 
 
4.5

Estimated fair value (Dollars)
 
 
 
 
2.02
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable [Table Text Block]
A summary of stock options outstanding at September 25, 2016 is as follows:
(Dollars)
Options Outstanding
 
 
Options Exercisable
 
Range of
Exercise
Prices
Number
Outstanding (Thousands)

Weighted Average
Remaining Contractual
Life (Years)
 
Weighted
Average
Exercise Price

 
Number
Exercisable  (Thousands)

 
Weighted
Average
Exercise Price

 
 
 
 
 
 
 
 
 
1 - 5 
1,659

4.5
 
1.80

 
1,653

 
1.80

25 - 50
39

0.1
 
28.72

 
39

 
28.72

 
1,698

4.4
 
2.42

 
1,692

 
2.42
Restricted Stock [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
A summary of restricted Common Stock activity follows:
(Thousands of Shares)
2016

 
2015

 
2014

 
 
 
 
 
 
Outstanding, beginning of year
1,546

 
1,291

 
500

Granted
1,018

 
786

 
817

Vested
(63
)
 
(500
)
 
—

Forfeited
(39
)
 
(31
)
 
(26
)
Outstanding, end of year
2,462

 
1,546

 
1,291
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value [Table Text Block]
Weighted average grant date fair values of restricted Common Stock are as follows:
(Dollars)
2016

 
2015

 
2014

 
 
 
 
 
 
Outstanding, beginning of year
3.62

 
2.72

 
1.31

Granted
1.49

 
3.62

 
3.61

Vested
3.39

 
1.31

 
—

Forfeited
3.31

 
3.62

 
3.61

Outstanding, end of year
2.74

 
3.62

 
2.72