Segment And Geographic Information (Operating Segments) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Segment Reporting Information [Line Items]
Net sales	$ 603,550	$ 574,341	$ 1,786,955	$ 1,702,908
Depreciation and amortization	12,274	14,102	36,591	42,002
Income from operations	20,815	18,082	55,459	52,090
Capital expenditures	11,357	9,195	37,736	25,398
Total assets	2,076,706		2,076,706		$ 1,998,668
Elimination Of Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Net sales	(20,521)	(19,814)	(67,199)	(58,130)
Corporate And Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Income from operations	(18,171)	(18,126)	(54,651)	(51,642)
Americas [Member]
Segment Reporting Information [Line Items]
Net sales	378,129	387,827	1,158,290	1,135,995
Depreciation and amortization	5,679	6,031	16,599	17,639
Income from operations	15,463	21,481	49,270	60,960
Capital expenditures	8,548	7,102	17,584	16,698
Total assets	832,024		832,024		864,388
Asia [Member]
Segment Reporting Information [Line Items]
Net sales	202,149	169,215	568,247	505,410
Depreciation and amortization	2,882	4,055	9,021	12,304
Income from operations	20,963	12,337	53,328	34,894
Capital expenditures	1,696	1,372	12,820	5,945
Total assets	689,571		689,571		634,838
Europe [Member]
Segment Reporting Information [Line Items]
Net sales	43,793	37,113	127,617	119,633
Depreciation and amortization	705	702	2,041	2,098
Income from operations	2,560	2,390	7,512	7,878
Capital expenditures	638	532	4,018	1,204
Total assets	452,015		452,015		393,443
Corporate And Other [Member]
Segment Reporting Information [Line Items]
Total assets	103,096		103,096		$ 105,999
Corporate [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	3,008	3,314	8,930	9,961
Capital expenditures	$ 475	$ 189	$ 3,314	$ 1,551