Shareholders' Equity (Accumulated Other Comprehensive Loss) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 03, 2015	Dec. 28, 2013	Dec. 29, 2012
Accumulated Other Comprehensive (Loss) Income, Net of Tax [Roll Forward]
Ending Balance	$ (5,375)	$ 965
Foreign Currency Translation Adjustment [Member]
Accumulated Other Comprehensive (Loss) Income, Net of Tax [Roll Forward]
Beginning Balance	2,913	5,475	5,211
Changes during the year	(690)	(2,562)	264
Less: Taxes	0	0	0
Amounts reclassified from accumulated other comprehensive income, net of tax	0	0
Ending Balance	2,223	2,913	5,475
Unrealized Gains (Losses) on Marketable Securities [Member]
Accumulated Other Comprehensive (Loss) Income, Net of Tax [Roll Forward]
Beginning Balance	81	205	143
Changes during the year	(67)	(191)	95
Less: Taxes	(23)	(67)	33
Amounts reclassified from accumulated other comprehensive income, net of tax	0	0
Ending Balance	37	81	205
Pension Postretirement Liability [Member]
Accumulated Other Comprehensive (Loss) Income, Net of Tax [Roll Forward]
Beginning Balance	(2,140)	(4,291)	(3,583)
Changes during the year	(7,280)	3,389	(1,132)
Less: Taxes	(2,657)	1,312	(424)
Amounts reclassified from accumulated other comprehensive income, net of tax	0	74
Ending Balance	(6,763)	(2,140)	(4,291)
Derivative Financial Instruments [Member]
Accumulated Other Comprehensive (Loss) Income, Net of Tax [Roll Forward]
Beginning Balance	111	(76)	(56)
Changes during the year	(1,728)	538	(30)
Less: Taxes	(631)	197	(10)
Amounts reclassified from accumulated other comprehensive income, net of tax	114	(154)
Ending Balance	(872)	111	(76)
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive (Loss) Income, Net of Tax [Roll Forward]
Beginning Balance	965	1,313	1,715
Changes during the year	(9,765)	1,174	(803)
Less: Taxes	(3,311)	1,442	(401)
Amounts reclassified from accumulated other comprehensive income, net of tax	114	(80)
Ending Balance	$ (5,375)	$ 965	$ 1,313