Accounting Changes and Error Corrections (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jul. 01, 2022	Jun. 30, 2023	Jul. 01, 2022	Dec. 31, 2022
Change in Accounting Estimate [Line Items]
Income tax refunds receivable	$ 4,514		$ 4,514		$ 14,843
Total Revision to Assets					187,226
Retained earnings	678,456		678,456		685,234
Cost of sales	122,320	$ 109,027	250,269	$ 216,682
Income tax expense	2,115	479	1,909	1,745
Net earnings	$ 5,255	$ 3,774	$ 4,486	$ 7,649
Basic earnings per share (in usd per share)	$ 0.19	$ 0.13	$ 0.16	$ 0.27
Diluted earnings per share from continuing operations	$ 0.19	$ 0.13	$ 0.16	$ 0.27
Comprehensive income (loss)	$ 9,584	$ (5,587)	$ 12,443	$ (6,168)
Inventories			(21,094)	(23,849)
Income tax refunds receivable			10,332	(2,484)
Net cash provided by operating activities			18,806	(26,954)
Inventories	$ 192,785		$ 192,785		172,383
Revision of Prior Period, Adjustment
Change in Accounting Estimate [Line Items]
Income tax refunds receivable					862
Total Revision to Assets					(3,223)
Retained earnings					(3,223)
Cost of sales		368		562
Income tax expense		(78)		(119)
Net earnings		$ (290)		$ (443)
Basic earnings per share (in usd per share)		$ (0.02)		$ (0.02)
Diluted earnings per share from continuing operations		$ (0.01)		$ (0.02)
Comprehensive income (loss)		$ (290)		$ (443)
Inventories				562
Income tax refunds receivable				(119)
Net cash provided by operating activities				0
Inventories					(4,085)
Revision of Prior Period, Adjustment | Precision Products
Change in Accounting Estimate [Line Items]
Inventories					2,500
Revision of Prior Period, Adjustment | Structures
Change in Accounting Estimate [Line Items]
Inventories					1,600
Previously Reported
Change in Accounting Estimate [Line Items]
Income tax refunds receivable					13,981
Total Revision to Assets					190,449
Retained earnings					688,457
Cost of sales		108,659		216,120
Income tax expense		557		1,864
Net earnings		$ 4,064		$ 8,092
Basic earnings per share (in usd per share)		$ 0.15		$ 0.29
Diluted earnings per share from continuing operations		$ 0.14		$ 0.29
Comprehensive income (loss)		$ (5,297)		$ (5,725)
Inventories				(24,411)
Income tax refunds receivable				(2,365)
Net cash provided by operating activities				$ (26,954)
Inventories					$ 176,468