Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock, Common [Member]	Total
Balance at Dec. 31, 2022	$ 49,276	$ 687,218	$ 290,402	$ (40,012)	$ (58,043)	$ 928,841
Net income (loss)	0	0	15,685	0	0	15,685
Changes in cumulative translation adjustment	0	0	0	2,701	0	2,701
Adjustments related to postretirement benefits	0	0	0	29	0	29
Changes in unrealized gains and losses on investments, net of tax	0	0	0	273	0	273
Shares issued for restricted stock units vested	7	(18,067)	0	0	18,060	0
Repurchase and retirement of stock		(1,861)	0	0	(7,322)	(9,183)
Common stock repurchases	0	0	0	0	(3,481)	(3,481)
Share-based compensation expense	0	3,914	0	0	0	3,914
Balance at Apr. 01, 2023	49,283	671,204	306,087	(37,009)	(50,786)	938,779
Balance at Dec. 30, 2023	49,429	686,146	318,558	(34,779)	(69,184)	950,170	[1]
Net income (loss)	0	0	(14,635)	0	0	(14,635)
Changes in cumulative translation adjustment	0	0	0	(9,407)	0	(9,407)
Adjustments related to postretirement benefits	0	0	0	(5)	0	(5)
Changes in unrealized gains and losses on investments, net of tax	0	0	0	(96)	0	(96)
Shares issued for restricted stock units vested	0	(11,677)	0	0	11,677	0
Repurchase and retirement of stock		(85)	0	0	(4,449)	(4,534)
Common stock repurchases	0	0	0	0	(10,764)	(10,764)
Share-based compensation expense	0	4,628	0	0	0	4,628
Balance at Mar. 30, 2024	$ 49,429	$ 679,012	$ 303,923	$ (44,287)	$ (72,720)	$ 915,357

[1] Derived from December 30, 2023 audited financial statements