Business Segments (Schedule Of Net Sales By Geographic Area) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Net Sales by Geographic Area, Total	$ 677,892	$ 903,582	$ 798,223
United States
Segment Reporting Information [Line Items]
Net Sales by Geographic Area, Total	537,818	717,049	614,987
Exports From The United States | Asia
Segment Reporting Information [Line Items]
Net Sales by Geographic Area, Total	26,239	41,995	59,242
Exports From The United States | Canada
Segment Reporting Information [Line Items]
Net Sales by Geographic Area, Total	15,597	15,264	17,776
Exports From The United States | Europe
Segment Reporting Information [Line Items]
Net Sales by Geographic Area, Total	1,905	3,885	4,489
Exports From The United States | Latin America
Segment Reporting Information [Line Items]
Net Sales by Geographic Area, Total	6,704	6,867	4,937
Operations Outside The United States | Asia
Segment Reporting Information [Line Items]
Net Sales by Geographic Area, Total	552	626	0
Operations Outside The United States | Brazil
Segment Reporting Information [Line Items]
Net Sales by Geographic Area, Total	$ 89,077	$ 117,896	$ 96,792