Segment And Geographic Information (Operating Segments) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Segment Reporting Information [Line Items]
Sales to our largest customers	$ 608,136	$ 557,903
Depreciation and amortization	12,384	12,273
Income from operations	17,967	10,889
Interest expense	2,428	2,225
Interest income	1,933	1,074
Other Non operating Income Expense	43	(81)
Income before income taxes	17,515	9,657
Capital expenditures	20,877	7,578
Total assets	2,058,006		$ 2,109,304
Elimination Of Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Sales to our largest customers	(16,567)	(23,365)
Corporate And Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Income from operations	(19,414)	(17,481)
Americas [Member]
Segment Reporting Information [Line Items]
Sales to our largest customers	378,785	361,320
Depreciation and amortization	5,609	5,505
Income from operations	16,737	12,621
Capital expenditures	12,849	3,266
Total assets	786,480		812,187
Asia [Member]
Segment Reporting Information [Line Items]
Sales to our largest customers	195,122	179,304
Depreciation and amortization	2,822	3,166
Income from operations	17,649	13,379
Capital expenditures	5,713	2,410
Total assets	726,481		674,783
Europe [Member]
Segment Reporting Information [Line Items]
Sales to our largest customers	50,796	40,644
Depreciation and amortization	884	657
Income from operations	2,995	2,370
Capital expenditures	1,022	914
Total assets	206,237		470,786
Corporate And Other [Member]
Segment Reporting Information [Line Items]
Total assets	338,808		$ 151,548
Corporate [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	3,069	2,945
Capital expenditures	$ 1,293	$ 988