RETIREMENT BENEFIT PLANS, Assumptions Used to Determine the Projected Benefit Obligations and Estimated Benefit Payments (Details)	12 Months Ended
	Dec. 31, 2016 USD ($) Plan	Jan. 02, 2016 USD ($) Plan
Assumptions used to determine the projected benefit obligations [Abstract]
Accumulated benefit obligation for all qualified and nonqualified defined benefit pension plans	$ 92,258,937	$ 83,433,339
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	$ 92,258,937	$ 87,427,769
Accumulated benefit obligation	92,258,937	83,433,339
Fair value of plan assets	65,627,499	63,122,843
Net amount recognized in accrued benefit liability	$ (26,631,438)	(24,304,926)
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 expense	$ 985,000
Reduction in pension expense	541,000
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	(26,631,438)	$ (24,304,926)
Estimated future benefit payments to participants [Abstract]
2017	3,800,000
2018	4,000,000
2019	4,200,000
2020	4,500,000
2021	4,700,000
2022 through 2026	26,200,000
Contributions expected to be made by Company in next fiscal year	$ 700,000
Pension Benefits [Member] | Minimum [Member]
Assumptions used to determine the projected benefit obligations [Abstract]
Discount rate	4.04%	4.24%
Pension Benefits [Member] | Maximum [Member]
Assumptions used to determine the projected benefit obligations [Abstract]
Discount rate	4.08%	4.28%
Other Postretirement Benefits [Member]
Assumptions used to determine the projected benefit obligations [Abstract]
Discount rate	4.12%	4.23%
Pension plans with projected benefit obligation and accumulated benefit obligation in excess of plan assets [Abstract]
Net amount recognized in accrued benefit liability	$ (1,051,700)	$ (793,055)
Estimated future benefit payments to participants [Abstract]
2017	103,000
2018	105,000
2019	108,000
2020	111,000
2021	113,000
2022 through 2026	597,000
Contributions expected to be made by Company in next fiscal year	$ 103,000
Supplemental Plans [Member]
Assumptions used to determine the projected benefit obligations [Abstract]
Discount rate	3.03%	3.53%