Retirement Plans (Amounts Recognized in Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Jan. 02, 2016
Pensions [Member]
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), after Tax [Abstract]
Net actuarial loss (gain)	$ 119,450	$ 119,712
Prior service cost	0	0
Total	119,450	119,712
Supplemental Employee Retirement Plans [Member]
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), after Tax [Abstract]
Net actuarial loss (gain)	4,567	5,438
Prior service cost	0	0
Total	4,567	5,438
Other Postretirement Benefit Plans [Member]
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), after Tax [Abstract]
Net actuarial loss (gain)	(899)	(1,045)
Prior service cost	40	44
Total	$ (859)	$ (1,001)