Accumulated Other Comprehensive Income (Loss) and Shareholders' Equity (Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	$ 563,259	$ 514,577	$ 501,009
Other comprehensive income (loss) before reclassifications	(3,614)	1,984	1,194
Tax (expense) or benefit	942	(1,173)	(14)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax	(1,063)	(799)	209
Reclassification of stranded tax impact	0
Ending Balance	584,368	563,259	514,577
Accumulated Other Comprehensive Income (Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(3,599)	(3,611)	(5,000)
Reclassification of stranded tax impact	(739)
Ending Balance	(8,073)	(3,599)	(3,611)
Foreign Currency Translation Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(2,973)	31	(1,188)
Other comprehensive income (loss) before reclassifications	61	(3,004)	1,219
Tax (expense) or benefit	0	0	0
Amounts reclassified from accumulated other comprehensive income (loss), net of tax	0	0	0
Reclassification of stranded tax impact	0
Ending Balance	(2,912)	(2,973)	31
Unrealized Gains (Losses) on Debt Securities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(156)	(132)	(105)
Other comprehensive income (loss) before reclassifications	318	(31)	(6)
Tax (expense) or benefit	(67)	7	(21)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax	0	0	0
Reclassification of stranded tax impact	0
Ending Balance	95	(156)	(132)
Pension and Post-retirement Liabilities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(2,929)	(5,630)	(5,167)
Other comprehensive income (loss) before reclassifications	(2,254)	3,531	(733)
Tax (expense) or benefit	606	(830)	270
Amounts reclassified from accumulated other comprehensive income (loss), net of tax	0	0	0
Reclassification of stranded tax impact	(1,185)
Ending Balance	(5,762)	(2,929)	(5,630)
Derivative Financial Instruments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	2,459	2,120	1,460
Other comprehensive income (loss) before reclassifications		1,488	714
Tax (expense) or benefit		(350)	(263)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax		(799)	209
Ending Balance		$ 2,459	$ 2,120
Derivative Financial Instruments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Other comprehensive income (loss) before reclassifications	(1,739)
Tax (expense) or benefit	403
Amounts reclassified from accumulated other comprehensive income (loss), net of tax	(1,063)
Reclassification of stranded tax impact	446
Ending Balance	$ 506