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Postretirement Benefits (Tables)
 12 Months Ended
Jan. 03, 2016
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]  
Schedule of Net Funded Status [Table Text Block]
The following was the plan status and accumulated postretirement benefit obligation (APBO) at January 3, 2016 and December 28, 2014:
 
 
January 3, 2016
 
December 28, 2014
Change in benefit obligation:
 
 
 
Benefit obligation at beginning of year
$
3,121

 
$
2,370

Service cost
127

 
85

Interest cost
114

 
92

Plan participants' contributions
101

 
89

Actuarial loss (gain)
(214
)
 
808

Benefits paid
(220
)
 
(342
)
Medicare part D prescription drug subsidy
31

 
19

Benefit obligation at end of year
$
3,060

 
$
3,121

Change in plan assets:
 

 
 

Fair value of plan assets at beginning of year
$
—

 
$
—

Employer contributions
88

 
234

Plan participants' contributions
101

 
89

Benefits paid
(220
)
 
(342
)
Medicare part D prescription drug subsidy
31

 
19

Fair value of plan assets at end of year
—

 
—

Funded status
$
(3,060
)
 
$
(3,121
)
Weighted average assumptions:
 

 
 

Discount rate used to determine benefit obligations
4.25
%
 
3.83
%
Discount rate used to determine net periodic benefit cost
3.83
%
 
4.48
%
Schedule of Net Benefit Costs [Table Text Block]
Components of net periodic postretirement benefit income recognized in the consolidated statements of operations were:
 
Year ended
 
January 3, 2016
 
December 28, 2014
 
December 29, 2013
Service cost
$
127

 
$
85

 
$
89

Interest cost
114

 
92

 
91

Amortization of net gains and losses
163

 
104

 
135

Amortization of prior service credit
(355
)
 
(355
)
 
(357
)
Net periodic postretirement benefit expense (income)
$
49

 
$
(74
)
 
$
(42
)
Schedule of Net Periodic Benefit Cost Not yet Recognized [Table Text Block]
Amounts recognized in accumulated other comprehensive income that have not yet been recognized as components of net periodic benefit income, consisted of:
 
Year ended
 
January 3, 2016
 
December 28, 2014
Prior service credit
$
2,327

 
$
2,682

Net loss
(2,218
)
 
(2,595
)
Deferred income taxes
(444
)
 
(444
)
Accumulated other comprehensive loss
$
(335
)
 
$
(357
)
Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]
The following table reflects the changes in accumulated other comprehensive income for the years ended January 3, 2016 and December 28, 2014:  
 
Year ended
 
January 3, 2016
 
December 28, 2014
Net actuarial loss (gain)
$
(214
)
 
$
808

Amortization of net loss
(163
)
 
(104
)
Amortization of prior service credit
355

 
355

Total recognized in accumulated other comprehensive loss
$
(22
)
 
$
1,059
Schedule of Health Care Cost Trend Rates [Table Text Block]
Assumed health care cost trend rates at year end were as follows:      
 
January 3, 2016
 
December 28, 2014
 
December 29, 2013
Medical benefits cost trend rate assumed for the following year pre-65
7.75
%
 
8.00
%
 
7.50
%
Medical benefits cost trend rate assumed for the following year post-65
6.75
%
 
7.00
%
 
5.88
%
Prescription drug benefit cost trend rate assumed for the following year
11.00
%
 
9.00
%
 
6.75
%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)
3.89
%
 
3.89
%
 
5.00
%
Year that the rate reaches the ultimate trend rate
2075

 
2075

 
2021
Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block]
A one-percentage-point change in the health care cost trend rates would have the following effects:  
 
1% Point Increase
 
1% Point Decrease
Effect on total of service and interest cost components
$
66

 
$
47

Effect on postretirement benefit obligation
584

 
434