Property, Plant And Equipment (Components Of Property, Plant And Equipment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Land	$ 13,082	$ 12,441
Buildings and improvements	70,979	66,076
Manufacturing machinery and equipment	134,149	135,885
Computer equipment and software	23,982	23,495
Furniture and fixtures	9,930	10,604
Motor vehicles	1,027	633
Construction in progress	5,699	4,235
Property, Plant and Equipment, Gross, Total	258,848	253,369
Accumulated depreciation	(159,135)	(166,340)
PROPERTY, PLANT AND EQUIPMENT, NET	99,713	87,029
Depreciation expense	13,304	14,254	$ 16,446
Capital Expenditures Incurred but Not yet Paid	$ 1,300	$ 1,800