Retirement Benefit Plans (Details) - USD ($)			1 Months Ended	3 Months Ended		9 Months Ended
	Apr. 30, 2016	Dec. 31, 2015	Dec. 31, 2015	Oct. 01, 2016	Oct. 03, 2015	Oct. 01, 2016	Oct. 03, 2015
Additional information [Abstract]
Gain from reduction of accumulated plan benefits				$ 2,500,000		$ 2,500,000
Reduction in pension expense				917,000		1,529,000
Employer contributions made						799,000
Contributions required by the Company in defined benefit plan						594,000
Minimum [Member]
Additional information [Abstract]
Contributions required by the Company in defined benefit plan						$ 594,000
Plan 401K Plan Original [Member]
Defined Contribution Plan Disclosure [Line Items]
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%
Plan 401 K Plan Amendment [Member]
Defined Contribution Plan Disclosure [Line Items]
Percentage of voluntary contributions allowed to participants, maximum						100.00%
Increase in employer matching contribution on first of total employee contributions, percentage						6.00%
Non-discretionary contribution percentage for employees who were not eligible to participate in the salaried plan						3.00%
Accrued non-discretionary contribution				193,000		$ 193,000
Contributions made by the Company under Section 401(k)				189,000	$ 49,000	363,000	$ 157,000
Increase in contributions made by the employer				126,000		$ 181,000
U.S. Non Union Employees [Member] | Minimum [Member]
Defined Contribution Plan Disclosure [Line Items]
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]
Defined Contribution Plan Disclosure [Line Items]
Non-discretionary contribution percentage for certain employees who were eligible to participate in the salaried plan						4.00%
Pension Benefits [Member]
Assumptions used to determine net periodic benefit cost [Abstract]
Discount rate	3.69%	4.24%	4.24%
Expected rate of return	8.00%	8.00%
Rate of compensation increase	0.00%	3.25%
Change in benefit obligation [Roll Forward]
Discount rate	$ 4,383,159
Service cost	770,361			270,721	964,985	$ 1,612,278	2,894,960
Interest cost	818,565			767,625	859,239	2,541,968	2,577,715
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			270,721	964,985	1,612,278	2,894,960
Interest cost	$ 818,565			767,625	859,239	2,541,968	2,577,715
Expected return on plan assets				(1,121,311)	(1,287,914)	(3,603,483)	(3,863,742)
Amortization of prior service cost				50,143	54,647	150,427	163,940
Amortization of the net loss				277,469	472,726	1,319,617	1,418,182
Net periodic benefit cost				244,647	1,063,683	2,020,807	3,191,055
Postretirement Benefits [Member]
Change in benefit obligation [Roll Forward]
Service cost				7,325	54,393	21,975	163,178
Interest cost				23,718	38,728	71,154	116,186
Components of the net periodic benefit cost [Abstract]
Service cost				7,325	54,393	21,975	163,178
Interest cost				23,718	38,728	71,154	116,186
Expected return on plan assets				(11,883)	(22,984)	(35,649)	(68,952)
Amortization of prior service cost				(5,973)	(5,972)	(17,918)	(17,916)
Amortization of the net loss				(23,480)	4,701	(70,441)	14,103
Net periodic benefit cost				$ (10,293)	$ 68,866	(30,879)	$ 206,599
Additional information [Abstract]
Employer contributions made						116,000
Contributions required by the Company in defined benefit plan						$ 155,000