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Derivative Financial Instruments (Schedule Of Derivative Instruments Fair Value And Balance Sheet Classification) (Details) - Forward exchange contracts [Member] - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Prepaid And Other Current Assets [Member]
Derivative instruments in asset positions, Forward exchange contracts	$ 69	$ 1,165
Other Long-Term Assets [Member]
Derivative instruments in asset positions, Forward exchange contracts	12	$ 116
Accounts Payable And Accrued Liabilities [Member]
Derivative instruments in liability positions, Forward exchange contracts	1,284
Other Long-Term Liabilities [Member]
Derivative instruments in liability positions, Forward exchange contracts	$ 150

X

- Definition

Fair value of all asset derivatives designated as cash flow hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624163-113959

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Fair value of all liability derivatives designated as cash flow hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624163-113959

+ Details

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Period Type:	instant

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- Details

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- Details

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X

- Details

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- Details

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