Accumulated Other Comprehensive Income (Loss) and Shareholders' Equity (Components) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ 584,368	$ 563,259
Other comprehensive income (loss) before reclassifications	(3,281)	550
Tax (expense) or benefit	632	100
Reclassification of stranded tax impact		0
Amounts reclassified from accumulated other comprehensive income (loss), net of tax	(108)	(352)
Ending balance	551,655	545,251
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(2,912)	(2,973)
Other comprehensive income (loss) before reclassifications	(600)	963
Tax (expense) or benefit	0	0
Reclassification of stranded tax impact		0
Amounts reclassified from accumulated other comprehensive income (loss), net of tax	0	0
Ending balance	(3,512)	(2,010)
Unrealized Gains (Losses) on Debt Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	95	(156)
Other comprehensive income (loss) before reclassifications	75	114
Tax (expense) or benefit	(16)	(24)
Reclassification of stranded tax impact		0
Amounts reclassified from accumulated other comprehensive income (loss), net of tax	0	0
Ending balance	154	(66)
Pension and Post-retirement Liabilities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(5,762)	(2,929)
Other comprehensive income (loss) before reclassifications	0	0
Tax (expense) or benefit	0	0
Reclassification of stranded tax impact		(1,185)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax	0	0
Ending balance	(5,762)	(4,114)
Derivative Financial Instruments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	506	2,459
Other comprehensive income (loss) before reclassifications	(2,756)	(527)
Tax (expense) or benefit	648	124
Reclassification of stranded tax impact		446
Amounts reclassified from accumulated other comprehensive income (loss), net of tax	(108)	(352)
Ending balance	(1,710)	2,150
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(8,073)	(3,599)
Reclassification of stranded tax impact		(739)
Ending balance	$ (10,830)	$ (4,040)