RETIREMENT BENEFIT PLANS, Assumptions Used to Determine the Projected Benefit Obligations and Estimated Benefit Payments (Details)	12 Months Ended
	Dec. 30, 2017 USD ($) Plan	Dec. 31, 2016 USD ($) Plan
Assumptions used to determine net periodic benefit obligations [Abstract]
Accumulated benefit obligation for all qualified and nonqualified defined benefit pension plans	$ 98,522,201	$ 92,258,937
Pension plans with projected benefit obligation and accumulated benefit obligation in excess of plan assets [Abstract]
Number of plans | Plan	6	6
Projected benefit obligation	$ 98,522,201	$ 92,258,937
Accumulated benefit obligation	98,522,201	92,258,937
Fair value of plan assets	72,098,722	65,627,499
Net amount recognized in accrued benefit liability	$ (26,423,429)	(26,631,438)
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 Benefits [Member]
Pension plans with projected benefit obligation and accumulated benefit obligation in excess of plan assets [Abstract]
Net amount recognized in accrued benefit liability	$ 26,423,429	$ 26,631,438
Estimated future benefit payments to participants [Abstract]
2018	3,800,000
2019	4,100,000
2020	4,300,000
2021	4,600,000
2022	4,800,000
2023 through 2027	26,800,000
Contributions expected to be made by Company in next fiscal year	$ 510,000
Pension Benefits [Member] | Minimum [Member]
Assumptions used to determine net periodic benefit obligations [Abstract]
Discount rate	3.54%	4.04%
Pension Benefits [Member] | Maximum [Member]
Assumptions used to determine net periodic benefit obligations [Abstract]
Discount rate	3.57%	4.08%
Other Postretirement Benefits [Member]
Assumptions used to determine net periodic benefit obligations [Abstract]
Discount rate	3.60%	4.12%
Pension plans with projected benefit obligation and accumulated benefit obligation in excess of plan assets [Abstract]
Net amount recognized in accrued benefit liability	$ 1,032,171	$ 1,051,700
Estimated future benefit payments to participants [Abstract]
2018	105,000
2019	106,000
2020	107,000
2021	109,000
2022	110,000
2023 through 2027	569,000
Contributions expected to be made by Company in next fiscal year	$ 105,000
Supplemental Pension [Member]
Assumptions used to determine net periodic benefit obligations [Abstract]
Discount rate	3.10%	3.03%