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RETIREMENT BENEFIT PLANS, Assumptions Used to Determine the Projected Benefit Obligations and Estimated Benefit Payments (Details) | 12 Months Ended
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Dec. 28, 2019 USD ($) Plan | Dec. 29, 2018 USD ($) Plan
Estimated future benefit payments to participants [Abstract] |  |
Period of horizon for various asset classes used in calculating expected long term rates of return | 10 years |
Pension Benefit [Member] |  |
Assumptions used to determine net periodic benefit obligations [Abstract] |  |
Accumulated benefit obligation for all qualified and nonqualified defined benefit pension plans | $ 102,991,053 | $ 91,533,200
Pension plans with projected benefit obligation and accumulated benefit obligation in excess of plan assets [Abstract] |  |
Number of plans | Plan | 5 | 5
Projected benefit obligation | $ 102,991,043 | $ 91,533,200
Accumulated benefit obligation | 102,991,043 | 91,533,200
Fair value of plan assets | 74,359,558 | 66,170,875
Net amount recognized in accrued benefit liability | (28,631,485) | $ (25,362,325)
Estimated future benefit payments to participants [Abstract] |  |
2020 | 4,300,000 |
2021 | 4,500,000 |
2022 | 4,700,000 |
2023 | 4,900,000 |
2024 | 5,100,000 |
2025 through 2029 | 28,000,000 |
Contributions expected to be made by Company in next fiscal year | $ 2,700,000 |
Pension Benefit [Member] | Minimum [Member] |  |
Assumptions used to determine net periodic benefit obligations [Abstract] |  |
Discount rate | 3.18% | 4.20%
Pension Benefit [Member] | Maximum [Member] |  |
Assumptions used to determine net periodic benefit obligations [Abstract] |  |
Discount rate | 3.23% | 4.22%
Other Postretirement Benefit [Member] |  |
Assumptions used to determine net periodic benefit obligations [Abstract] |  |
Discount rate | 3.35% | 4.26%
Pension plans with projected benefit obligation and accumulated benefit obligation in excess of plan assets [Abstract] |  |
Net amount recognized in accrued benefit liability | $ (1,007,146) | $ (648,635)
Estimated future benefit payments to participants [Abstract] |  |
2020 | 50,000 |
2021 | 49,000 |
2022 | 50,000 |
2023 | 51,000 |
2024 | 52,000 |
2025 through 2029 | 293,000 |
Contributions expected to be made by Company in next fiscal year | $ 50,000 |
Supplemental Pension [Member] |  |
Assumptions used to determine net periodic benefit obligations [Abstract] |  |
Discount rate | 2.61% | 3.81%

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