Segment And Geographic Information (Operating Segments) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Segment Reporting Information [Line Items]
Sales	$ 505,721	$ 514,964
Depreciation and amortization	11,055	12,192
Income from operations	11,934	6,490
Interest expense	(2,149)	(1,702)
Interest income	165	599
Other income (expense)	(276)	(662)
Income before income taxes	9,674	4,725
Capital expenditures	6,422	12,896
Total assets	1,760,753		$ 1,744,235
Elimination Of Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Sales	(20,301)	(18,041)
Corporate And Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Income from operations	(18,890)	(19,122)
Americas [Member]
Segment Reporting Information [Line Items]
Sales	276,838	314,396
Depreciation and amortization	5,295	5,585
Income from operations	8,234	12,425
Capital expenditures	4,919	9,260
Total assets	778,104		777,658
Asia [Member]
Segment Reporting Information [Line Items]
Sales	188,304	171,609
Depreciation and amortization	2,686	2,714
Income from operations	17,352	10,998
Capital expenditures	205	2,525
Total assets	564,114		532,793
Europe [Member]
Segment Reporting Information [Line Items]
Sales	60,880	47,000
Depreciation and amortization	712	725
Income from operations	5,238	2,189
Capital expenditures	286	846
Total assets	168,880		146,277
Corporate [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	2,362	3,168
Capital expenditures	1,012	$ 265
Total assets	$ 249,655		$ 287,507