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RETIREMENT BENEFIT PLANS, Net Periodic Benefit Cost and Assumptions (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 30, 2017 | Dec. 31, 2016 | Jan. 02, 2016 | Sep. 01, 2017
RETIREMENT BENEFIT PLANS [Abstract] |  |  |  |
Increase in expense of unrecognized prior service cost | $ 14,928 |  |  |
Modification of benefit multiplier |  |  |  | $ 0.50
Modification of benefit multiplier on each subsequent anniversary for the lifetime of the contract |  |  |  | $ 0.50
Modification of benefit multiplier at end of current contract | 45.00 |  |  |
Pension Benefits [Member] |  |  |  |
Components of the net periodic benefit cost [Abstract] |  |  |  |
Service cost | 1,276,608 | $ 1,977,295 | $ 3,770,191 |
Interest cost | 3,170,194 | 3,486,982 | 3,472,870 |
Expected return on plan assets | (4,783,531) | (4,995,858) | (5,151,654) |
Amortization of prior service cost | 178,874 | 200,568 | 218,585 |
Amortization of the net loss | 1,231,486 | 1,704,863 | 1,928,298 |
Net periodic benefit cost | $ 1,073,631 | $ 2,373,850 | $ 4,238,290 |
Assumptions used to determine net periodic benefit cost [Abstract] |  |  |  |
Discount rate |  |  | 3.90% |
Expected return on plan assets | 7.50% | 8.00% | 8.00% |
Rate of compensation increase | 0.00% | 3.25% | 3.25% |
Pension Benefits [Member] | Minimum [Member] |  |  |  |
Assumptions used to determine net periodic benefit cost [Abstract] |  |  |  |
Discount rate | 4.04% | 4.24% |  |
Pension Benefits [Member] | Maximum [Member] |  |  |  |
Assumptions used to determine net periodic benefit cost [Abstract] |  |  |  |
Discount rate | 4.08% | 4.28% |  |
Other Postretirement Benefits [Member] |  |  |  |
Components of the net periodic benefit cost [Abstract] |  |  |  |
Service cost | $ 27,389 | $ 29,300 | $ 217,570 |
Interest cost | 80,827 | 94,872 | 154,915 |
Expected return on plan assets | (51,494) | (47,532) | (91,936) |
Amortization of prior service cost | (21,444) | (23,890) | (23,889) |
Amortization of the net loss | (77,601) | (93,921) | 18,804 |
Net periodic benefit cost | $ (42,323) | $ (41,171) | $ 275,464 |
Assumptions used to determine net periodic benefit cost [Abstract] |  |  |  |
Discount rate | 4.12% | 4.23% | 3.90% |
Expected return on plan assets | 4.00% | 8.00% | 8.00% |
Supplemental Pension [Member] |  |  |  |
Assumptions used to determine net periodic benefit cost [Abstract] |  |  |  |
Discount rate | 3.03% | 3.53% | 3.90% |

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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(4) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(5) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(3) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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