Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2022	Jul. 02, 2021	Jul. 01, 2022	Jul. 02, 2021
Income Statement [Abstract]
Net sales	$ 160,766	$ 182,394	$ 318,814	$ 354,010
Cost of sales	108,659	120,448	216,120	239,159
Gross profit	52,107	61,946	102,694	114,851
Selling, general and administrative expenses	39,250	38,719	78,971	76,847
Research and Development Expense	5,215	3,238	10,328	7,464
Amortization of Intangible Assets	2,439	2,637	4,906	5,274
Costs of Transaction Services Agreement	0	999	0	1,704
Restructuring and severance costs	2,927	1,516	3,096	2,868
Gain (Loss) on Disposition of Business	0	0	0	234
Net (gain) loss on sale of assets	(4)	5	56	15
Operating income	2,280	14,832	5,337	20,445
Interest expense, net	1,993	4,335	4,474	8,586
Non-service pension and post-retirement benefit income	(5,024)	(6,577)	(10,287)	(13,220)
Income from Transaction Services Agreement	0	(442)	0	(917)
Other expense, net	690	158	1,194	447
Earnings before income taxes	4,621	17,358	9,956	25,549
Income tax expense	557	5,502	1,864	5,709
Net earnings	$ 4,064	$ 11,856	$ 8,092	$ 19,840
Earnings per share:
Basic earnings per share (in usd per share)	$ 0.15	$ 0.43	$ 0.29	$ 0.71
Diluted earnings per share (in usd per share)	$ 0.14	$ 0.42	$ 0.29	$ 0.71
Average shares outstanding:
Basic (in shares)	28,005	27,867	27,977	27,841
Diluted (in shares)	28,059	27,913	28,071	27,890