Segment And Geographic Information (Operating Segments) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Segment Reporting Information [Line Items]
Net sales	$ 514,964	$ 602,820
Depreciation and amortization	12,192	12,172
Income from operations	6,490	16,087
Interest expense	(1,702)	(1,609)
Interest income	599	1,297
Other income (expense), net	(662)	1,604
Income before income taxes	4,725	17,379
Capital expenditures	12,896	10,074
Total assets	1,823,382		$ 1,759,874
Elimination Of Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Net sales	(18,041)	(20,607)
Corporate And Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Income from operations	(19,122)	(20,466)
Americas [Member]
Segment Reporting Information [Line Items]
Net sales	314,396	392,058
Depreciation and amortization	5,585	5,381
Income from operations	12,425	20,228
Capital expenditures	9,260	4,753
Total assets	820,673		792,180
Asia [Member]
Segment Reporting Information [Line Items]
Net sales	171,609	187,409
Depreciation and amortization	2,714	2,811
Income from operations	10,998	15,385
Capital expenditures	2,525	2,838
Total assets	534,810		533,508
Europe [Member]
Segment Reporting Information [Line Items]
Net sales	47,000	43,960
Depreciation and amortization	725	814
Income from operations	2,189	940
Capital expenditures	846	388
Total assets	133,359		139,977
Corporate And Other [Member]
Segment Reporting Information [Line Items]
Total assets	334,540		$ 294,209
Corporate [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	3,168	3,166
Capital expenditures	$ 265	$ 2,095