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Derivative Financial Instruments (Summary Of Derivative Financial Instruments Notional Amounts On Outstanding Positions) (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
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Derivatives, Fair Value [Line Items] |  |
Total notional value | $ 194,582 | $ 224,680
Derivative fair value | (1,313) | (406)
Euro |  |
Derivatives, Fair Value [Line Items] |  |
Total notional value | 34,959 | 37,718
Derivative fair value | (92) | (122)
Singapore Dollar |  |
Derivatives, Fair Value [Line Items] |  |
Total notional value | 34,584 | 73,455
Derivative fair value | 254 | 364
Japanese Yen |  |
Derivatives, Fair Value [Line Items] |  |
Total notional value | 25,561 | 30,688
Derivative fair value | (178) | (89)
British Pound Sterling |  |
Derivatives, Fair Value [Line Items] |  |
Total notional value | 22,185 | 13,233
Derivative fair value | 183 | 80
South Korean Won |  |
Derivatives, Fair Value [Line Items] |  |
Total notional value | 9,408 | 15,888
Derivative fair value | 63 | (134)
Other currencies |  |
Derivatives, Fair Value [Line Items] |  |
Total notional value | 67,885 | 53,698
Derivative fair value | $ (1,543) | $ (505)

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- Definition Nominal or face amount used to calculate payments on the derivative asset. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959 + Details
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- Definition Fair value of the assets less the liabilities of a derivative or group of derivatives. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13433-108611 + Details
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