| Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract] | Period [Axis] |
|---|
2016-01-04 - 2017-01-01 |
|---|
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 1, 2017 and January 3, 2016: | | | | | | | | | | January 1, 2017 | | January 3, 2016 | Change in benefit obligation: | | | | Benefit obligation at beginning of year | $ | 3,060 |
| | $ | 3,121 |
| Service cost | 150 |
| | 127 |
| Interest cost | 165 |
| | 114 |
| Plan participants' contributions | 98 |
| | 101 |
| Actuarial loss (gain) | 1,251 |
| | (214 | ) | Benefits paid | (164 | ) | | (220 | ) | Medicare part D prescription drug subsidy | 6 |
| | 31 |
| Benefit obligation at end of year | $ | 4,566 |
| | $ | 3,060 |
| Change in plan assets: | |
| | |
| Fair value of plan assets at beginning of year | $ | — |
| | $ | — |
| Employer contributions | 60 |
| | 88 |
| Plan participants' contributions | 98 |
| | 101 |
| Benefits paid | (164 | ) | | (220 | ) | Medicare part D prescription drug subsidy | 6 |
| | 31 |
| Fair value of plan assets at end of year | — |
| | — |
| Funded status | $ | (4,566 | ) | | $ | (3,060 | ) | Weighted average assumptions: | |
| | |
| Discount rate used to determine benefit obligations | 4.11 | % | | 4.25 | % | Discount rate used to determine net periodic benefit cost | 4.25 | % | | 3.83 | % |
|
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 1, 2017 | | January 3, 2016 | | December 28, 2014 | Service cost | $ | 150 |
| | $ | 127 |
| | $ | 85 |
| Interest cost | 165 |
| | 114 |
| | 92 |
| Amortization of net gains and losses | 197 |
| | 163 |
| | 104 |
| Amortization of prior service credit | (355 | ) | | (355 | ) | | (355 | ) | Net periodic postretirement benefit expense (income) | $ | 157 |
| | $ | 49 |
| | $ | (74 | ) |
|
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 1, 2017 | | January 3, 2016 | Prior service credit | $ | 1,972 |
| | $ | 2,327 |
| Net loss | (3,272 | ) | | (2,218 | ) | Deferred income taxes | 97 |
| | (444 | ) | Accumulated other comprehensive loss | $ | (1,203 | ) | | $ | (335 | ) |
|
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 1, 2017 and January 3, 2016: | | | | | | | | | | Year ended | | January 1, 2017 | | January 3, 2016 | Net actuarial loss (gain) | $ | 1,251 |
| | $ | (214 | ) | Amortization of net loss | (197 | ) | | (163 | ) | Amortization of prior service credit | 355 |
| | 355 |
| Deferred income taxes | (541 | ) | | — |
| Total recognized in accumulated other comprehensive loss | $ | 868 |
| | $ | (22 | ) |
|
Schedule of Health Care Cost Trend Rates [Table Text Block] | Assumed health care cost trend rates at year end were as follows: | | | | | | | | | | | January 1, 2017 | | January 3, 2016 | | December 28, 2014 | Medical benefits cost trend rate assumed for the following year pre-65 | 7.50 | % | | 7.75 | % | | 8.00 | % | Medical benefits cost trend rate assumed for the following year post-65 | 6.50 | % | | 6.75 | % | | 7.00 | % | Prescription drug benefit cost trend rate assumed for the following year | 10.50 | % | | 11.00 | % | | 9.00 | % | Rate to which the cost trend rate is assumed to decline (the ultimate trend rate) | 3.89 | % | | 3.89 | % | | 3.89 | % | Year that the rate reaches the ultimate trend rate | 2075 |
| | 2075 |
| | 2075 |
|
|
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 | $ | 89 |
| | $ | 64 |
| Effect on postretirement benefit obligation | 966 |
| | 731 |
|
|