Retirement Plans (Components of Net Periodic Pension Cost) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016
Net Periodic Benefit Cost [Abstract]
Service cost	$ 2	$ 2
Interest cost	14,196	14,061
Expected return on plan assets	(19,101)	(20,976)
Net amortization and deferral	0	0
Recognized net actuarial loss	9,956	8,877
Net periodic expense	$ 5,053	$ 1,964