Shareholders' Equity - Summary of Activity Impacting Shareholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2023	Jan. 01, 2023	Dec. 31, 2023	Jan. 01, 2023
Summary of activity impacting shareholders' equity
Beginning balance	$ 215,301	$ 219,409	$ 211,024	$ 219,947
Net income (loss)	780	(2,515)	5,235	(2,578)
Dividend declared - non- controlling Interests of subsidiaries				(600)
Translation adjustments	1,014	429	365	(253)
Purchase of SPA non-controlling interest			(97)
Stock based compensation	479	263	984	874
Pension and postretirement adjustment, net of tax	47	70	93	140
Stock option exercises				109
Employee stock purchases	20	20	37	37
Ending balance	217,641	217,676	217,641	217,676
Common Stock
Summary of activity impacting shareholders' equity
Beginning balance	76	75	75	75
Employee stock purchases			1
Ending balance	76	75	76	75
Capital in Excess of Par Value
Summary of activity impacting shareholders' equity
Beginning balance	100,721	102,250	100,309	101,524
Purchase of SPA non-controlling interest			(97)
Stock based compensation	479	263	984	874
Stock option exercises				109
Employee stock purchases	7	7	11	13
Ending balance	101,207	102,520	101,207	102,520
Retained Earnings
Summary of activity impacting shareholders' equity
Beginning balance	238,464	241,094	234,299	240,969
Net income (loss)	1,022	(1,839)	5,187	(1,714)
Ending balance	239,486	239,255	239,486	239,255
Accumulated Other Comprehensive Loss
Summary of activity impacting shareholders' equity
Beginning balance	(14,527)	(19,256)	(14,194)	(18,588)
Translation adjustments	602	(40)	223	(778)
Pension and postretirement adjustment, net of tax	47	70	93	140
Ending balance	(13,878)	(19,226)	(13,878)	(19,226)
Treasury Stock
Summary of activity impacting shareholders' equity
Beginning balance	(135,514)	(135,569)	(135,526)	(135,580)
Employee stock purchases	13	13	25	24
Ending balance	(135,501)	(135,556)	(135,501)	(135,556)
Non-Controlling Interest
Summary of activity impacting shareholders' equity
Beginning balance	26,081	30,815	26,061	31,547
Net income (loss)	(242)	(676)	48	(864)
Dividend declared - non- controlling Interests of subsidiaries				(600)
Translation adjustments	412	469	142	525
Ending balance	$ 26,251	$ 30,608	$ 26,251	$ 30,608