Segment And Geographic Information (Operating Segments) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Segment Reporting Information [Line Items]
Sales	$ 544,662	$ 490,966	$ 1,050,383	$ 1,005,930
Depreciation and amortization	10,939	12,339	21,994	24,531
Income from operations	10,699	(1,872)	22,633	4,618
Interest expense	(2,079)	(2,351)	(4,228)	(4,053)
Interest income	164	287	329	886
Other income (expense)	440	32	164	(630)
Income (loss) before income taxes	9,224	(3,904)	18,898	821
Capital expenditures	12,197	10,394	18,619	23,290
Total assets	1,818,791		1,818,791		$ 1,744,235
Elimination Of Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Sales	(21,767)	(26,437)	(42,068)	(44,478)
Corporate And Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Income from operations	(28,465)	(18,795)	(47,355)	(37,917)
Americas [Member]
Segment Reporting Information [Line Items]
Sales	292,270	288,800	569,108	603,196
Depreciation and amortization	5,252	5,762	10,547	11,347
Income from operations	11,995	(787)	20,229	11,638
Capital expenditures	6,923	6,598	11,842	15,858
Total assets	811,692		811,692		777,658
Asia [Member]
Segment Reporting Information [Line Items]
Sales	222,539	188,379	410,843	359,988
Depreciation and amortization	2,657	2,732	5,343	5,446
Income from operations	25,467	17,024	42,819	28,022
Capital expenditures	2,129	791	2,334	3,316
Total assets	609,269		609,269		532,793
Europe [Member]
Segment Reporting Information [Line Items]
Sales	51,620	40,224	112,500	87,224
Depreciation and amortization	692	700	1,404	1,425
Income from operations	1,702	686	6,940	2,875
Capital expenditures	2,433	196	2,719	1,042
Total assets	169,411		169,411		146,277
Corporate [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	2,338	3,145	4,700	6,313
Capital expenditures	712	$ 2,809	1,724	$ 3,074
Total assets	$ 228,419		$ 228,419		$ 287,507