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Income Taxes (Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
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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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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32621-109319 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32632-109319 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=115928272&loc=d3e28680-109314 + Details
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