Benefit Plans (Net Pension Costs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2016	Jan. 01, 2016
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]
Service cost	$ 431	$ 439
Interest cost	174	165
Expected return on assets	(18)	(11)
Recognized net actuarial loss	72	164
Net pension cost	$ 659	$ 757