Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Oct. 01, 2021	Sep. 30, 2022	Oct. 01, 2021
Income Statement [Abstract]
Net sales	$ 172,004	$ 179,836	$ 490,818	$ 533,846
Cost of sales	116,179	116,771	332,299	355,930
Gross profit	55,825	63,065	158,519	177,916
Selling, general and administrative expenses	49,009	39,335	127,980	116,182
Research and Development Expense	3,937	2,540	14,265	10,004
Amortization of Intangible Assets	3,118	2,624	8,024	7,898
Costs of Transaction Services Agreement	0	24	0	1,728
Restructuring and severance costs	(243)	2,611	2,853	5,479
Gain (Loss) on Disposition of Business	(457)	0	(457)	234
Net loss (gain) on sale of assets	15	(31)	71	(16)
Operating income	446	15,962	5,783	36,407
Interest expense, net	3,614	3,646	8,088	12,232
Non-service pension and post-retirement benefit income	(5,142)	(6,612)	(15,429)	(19,832)
Income from Transaction Services Agreement	0	(14)	0	(931)
Other expense (income), net	1,221	(172)	2,415	275
Earnings before income taxes	753	19,114	10,709	44,663
Income tax expense	128	4,447	1,992	10,156
Net earnings	$ 625	$ 14,667	$ 8,717	$ 34,507
Earnings per share:
Basic earnings per share (in usd per share)	$ 0.02	$ 0.53	$ 0.31	$ 1.24
Diluted earnings per share (in usd per share)	$ 0.02	$ 0.53	$ 0.31	$ 1.24
Average shares outstanding:
Basic (in shares)	28,037	27,882	27,997	27,855
Diluted (in shares)	28,088	27,888	28,076	27,889