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Income Taxes (Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Property, plant and equipment	$ (22,443)	$ (20,191)
Inventory provisions	12,963	13,437
Allowances and accrued liabilities	(2,599)
Allowances and accrued liabilities		3,588
Other tax credits	10,771	10,294
Deferred compensation	17,481
Deferred compensation		(5,223)
Net operating loss carryforwards	3,364	3,993
Valuation allowance	(7,910)	(284)
Net deferred tax assets	$ 11,627	$ 5,614

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