Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 03, 2020	Jun. 28, 2019	Jul. 03, 2020	Jun. 28, 2019
Income Statement [Abstract]
Net sales	$ 177,890	$ 174,712	$ 385,212	$ 341,146
Cost of sales	121,222	122,123	260,842	234,036
Gross profit	56,668	52,589	124,370	107,110
Selling, general and administrative expenses	44,880	41,808	105,869	83,759
Costs of Transaction Services Agreement	4,373	0	8,513	0
Cost of Acquired Retention Plans	5,704	0	11,407	0
Restructuring costs	4,484	206	6,279	472
Gain (Loss) on Disposition of Business	0	0	(493)	0
Net gain on sale of assets	(3)	0	(13)	(65)
Operating (loss) income	(2,770)	10,575	(7,192)	22,944
Interest expense, net	5,808	5,236	9,055	10,537
Non-service pension and post retirement benefit income	(4,062)	(100)	(8,125)	(199)
Income from Transaction Services Agreement	(3,050)	0	(6,024)	0
Other (income) expense, net	(108)	(463)	110	(552)
(Loss) earnings from continuing operations before income taxes	(1,358)	5,902	(2,208)	13,158
Income tax (benefit) expense	(1,258)	(487)	(1,701)	947
Earnings from continuing operations	(100)	6,389	(507)	12,211
Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax	0	7,077	0	15,380
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax	0	0	692	0
Earnings from discontinued operations, net of tax	0	7,077	692	15,380
Net (loss) earnings	$ (100)	$ 13,466	$ 185	$ 27,591
Earnings per share:
Basic earnings per share from continuing operations	$ (0.00)	$ 0.23	$ (0.02)	$ 0.44
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	0.00	0.25	0.03	0.55
Basic earnings per share (in usd per share)	0.00	0.48	0.01	0.99
Diluted earnings per share from continuing operations	(0.00)	0.23	(0.02)	0.43
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	0.00	0.25	0.03	0.55
Diluted earnings per share (in usd per share)	$ 0.00	$ 0.48	$ 0.01	$ 0.98
Average shares outstanding:
Basic (in shares)	27,659	27,961	27,734	27,935
Diluted (in shares)	27,659	28,123	27,734	28,097