Retirement Plans (Funded Status and Net Periodic Cost) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016
Reconciliation of Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	$ 362,899
Service cost	2	$ 2
Interest cost	14,196	14,061
Actuarial loss (gain)	9,956	8,877
Benefit obligation at end of year	357,569	362,899
Pensions [Member]
Reconciliation of Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	345,901	365,326
Plan changes	0	0
Service cost	0	0
Interest cost	13,495	13,341
Actuarial loss (gain)	304	(14,715)
Benefits paid	(19,152)	(18,051)
Benefit obligation at end of year	340,548	345,901
Supplemental Employee Retirement Plans [Member]
Reconciliation of Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	16,998	18,508
Plan changes	1,822	0
Service cost	0	0
Interest cost	640	656
Actuarial loss (gain)	(531)	(94)
Benefits paid	(1,908)	(2,072)
Benefit obligation at end of year	17,021	16,998
Other Postretirement Benefit Plans [Member]
Reconciliation of Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	1,504	1,789
Plan changes	0	0
Service cost	2	2
Interest cost	58	63
Actuarial loss (gain)	60	(274)
Benefits paid	(68)	(76)
Benefit obligation at end of year	$ 1,556	$ 1,504