Retirement Plans (Components of Net Periodic Pension Cost) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2016	Dec. 27, 2014	Dec. 28, 2013
Net Periodic Benefit Cost [Abstract]
Service cost	$ 2	$ 2	$ 0
Interest cost	14,061	14,870	13,716
Expected return on plan assets	(20,976)	(20,792)	(18,455)
Net amortization and deferral	0	0	(6)
Recognized net actuarial loss	8,877	3,220	7,779
Net periodic expense (benefit)	$ 1,964	$ (2,700)	$ 3,034