Retirement Benefit Plans (Details) - USD ($)			3 Months Ended		6 Months Ended
	Apr. 30, 2016	Dec. 31, 2015	Jul. 02, 2016	Jul. 04, 2015	Jul. 02, 2016	Jul. 04, 2015
Components of the net periodic benefit cost [Abstract]
Gain from reduction of accumulated plan benefits			$ 2,500,000		$ 2,500,000
Reduction in pension expense					612,000
Employer contributions made					266,000
Contributions required by the Company in defined benefit plan					$ 181,250
Percentage of voluntary contributions allowed to participants, maximum					100.00%
Contributions made by the Company under Section 401(k)			117,365	$ 55,660	$ 173,596	$ 107,926
Employer matching contribution percentage		50.00%
Employer matching contribution on first of total employee contributions, percentage		4.00%
Non-discretionary contribution percentage for employees who were not eligible to participate in the salaried plan		2.50%			3.00%
Increase in contributions made by the employer			60,000
Accrued non-discretionary contribution			80,000		$ 80,000
Minimum [Member]
Components of the net periodic benefit cost [Abstract]
Contributions required by the Company in defined benefit plan					594,000
Pension Benefits [Member]
Assumptions used to determine net periodic benefit cost [Abstract]
Discount rate	3.69%	4.24%
Expected rate of return	8.00%	8.00%
Rate of compensation increase	0.00%	3.25%
Change in benefit obligation [Roll Foward]
Discount rate	$ 4,383,159
Service cost	770,361		528,552	964,988	1,341,557	1,929,975
Interest cost	818,565		1,007,763	859,217	1,774,343	1,718,476
Actuarial loss	611,693
Benefits paid	(1,026,898)
Additional recognition due to significant event	(2,534,589)
Net increase in pension benefit obligation	3,022,291
Components of the net periodic benefit cost [Abstract]
Service cost	770,361		528,552	964,988	1,341,557	1,929,975
Interest cost	$ 818,565		1,007,763	859,217	1,774,343	1,718,476
Expected return on plan assets			(1,238,231)	(1,287,914)	(2,482,172)	(2,575,828)
Amortization of prior service cost			50,141	54,646	100,284	109,293
Amortization of the net loss			415,093	472,728	1,042,148	945,456
Net periodic benefit cost			763,318	1,063,665	1,776,160	2,127,372
Postretirement Benefits [Member]
Change in benefit obligation [Roll Foward]
Service cost			3,900	54,393	14,650	108,785
Interest cost			26,936	38,729	47,436	77,458
Components of the net periodic benefit cost [Abstract]
Service cost			3,900	54,393	14,650	108,785
Interest cost			26,936	38,729	47,436	77,458
Expected return on plan assets			(12,016)	(22,984)	(23,766)	(45,968)
Amortization of prior service cost			(5,945)	(5,972)	(11,945)	(11,944)
Amortization of the net loss			(33,461)	4,701	(46,961)	9,402
Net periodic benefit cost			$ (20,586)	$ 68,867	(20,586)	$ 137,733
Employer contributions made					79,000
Contributions required by the Company in defined benefit plan					$ 118,000
401 (K) Plan Amendment [Member]
Components of the net periodic benefit cost [Abstract]
Increase in employer matching contribution on first of total employee contributions, percentage					6.00%
U.S. Non Union Employees [Member] | Minimum [Member]
Components of the net periodic benefit cost [Abstract]
Non-discretionary contribution percentage for certain employees who were eligible to participate in the salaried plan					0.00%
U.S. Non Union Employees [Member] | Maximum [Member]
Components of the net periodic benefit cost [Abstract]
Non-discretionary contribution percentage for certain employees who were eligible to participate in the salaried plan					4.00%