Discontinued Operations (Narrative) (Details) - USD ($)			12 Months Ended
	Apr. 01, 2023	Feb. 23, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations before taxes			$ 0	$ 0	$ 1,479,000
Discontinued Operation Gain Loss On Disposal Statement Of Income Or Comprehensive Income Extensible Enumeration Not Disclosed Flag					adjustment to loss on disposal
Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations before taxes			$ 0	$ 0	$ 1,500,000
Net sales					20,400,000
Operating expenses					17,500,000
Adjustment to loss on disposal					$ 1,400,000
Discontinued Operations, Disposed of by Sale | Industrial Business Segment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net proceeds of sale of business		$ 38,000,000
Seller note principal amount		13,000,000
Estimated pre-tax loss		30,000,000
Held for sale valuation allowance		$ 29,600,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Japan-Based Solar Racking Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Held for sale valuation allowance	$ 600,000
Proceeds from divestiture	$ 8,000,000