Deferred Compensation and Other Benefits - Schedule of Net Periodic Pension Cost (Details) - Deferred Compensation and Other Benefits [Member] - Executive Officer [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2018	Mar. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 80
Interest cost	148	$ 98
Expected return on assets	(164)	(69)
Amortization of actuarial loss	73	79
Net periodic pension cost	$ 137	$ 108