Derivative Instruments and Hedging Activities (Schedule Of Derivative Instrument Fair Value) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Derivatives Designated As Hedging Instruments Under ASC Topic 815
Derivatives, Fair Value [Line Items]
Notional Value	$ 555,543	$ 437,320
Derivatives Designated As Hedging Instruments Under ASC Topic 815 \| Other Current Assets
Derivatives, Fair Value [Line Items]
Asset, Fair Value	28,705	16,167
Derivatives Designated As Hedging Instruments Under ASC Topic 815 \| Accrued Liabilities
Derivatives, Fair Value [Line Items]
Liability, Fair Value	142	340
Derivatives Designated As Hedging Instruments Under ASC Topic 815 \| Foreign currency contracts \| Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Notional Value	554,551	436,352
Derivatives Designated As Hedging Instruments Under ASC Topic 815 \| Foreign currency contracts \| Other Current Assets \| Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Asset, Fair Value	28,528	16,167
Derivatives Designated As Hedging Instruments Under ASC Topic 815 \| Foreign currency contracts \| Accrued Liabilities \| Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Liability, Fair Value	142	181
Derivatives Designated As Hedging Instruments Under ASC Topic 815 \| Commodities contracts \| Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Notional Value	992	968
Derivatives Designated As Hedging Instruments Under ASC Topic 815 \| Commodities contracts \| Other Current Assets \| Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Asset, Fair Value	177	0
Derivatives Designated As Hedging Instruments Under ASC Topic 815 \| Commodities contracts \| Accrued Liabilities \| Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Liability, Fair Value	0	159
Derivatives Not Designated As Hedging Instruments Under ASC Topic 815
Derivatives, Fair Value [Line Items]
Notional Value	5,025	6,510
Derivatives Not Designated As Hedging Instruments Under ASC Topic 815 \| Other Current Assets
Derivatives, Fair Value [Line Items]
Asset, Fair Value	329	68
Derivatives Not Designated As Hedging Instruments Under ASC Topic 815 \| Accrued Liabilities
Derivatives, Fair Value [Line Items]
Liability, Fair Value	0	960
Derivatives Not Designated As Hedging Instruments Under ASC Topic 815 \| Commodities contracts
Derivatives, Fair Value [Line Items]
Notional Value	5,025	6,510
Derivatives Not Designated As Hedging Instruments Under ASC Topic 815 \| Commodities contracts \| Other Current Assets
Derivatives, Fair Value [Line Items]
Asset, Fair Value	329	68
Derivatives Not Designated As Hedging Instruments Under ASC Topic 815 \| Commodities contracts \| Accrued Liabilities
Derivatives, Fair Value [Line Items]
Liability, Fair Value	$ 0	$ 960

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

+ Details

Name:	invest_DerivativeNotionalAmount
Namespace Prefix:	invest_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Definition

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (a),(c)
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624163-113959

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226000-175313

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 4D
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=64830801&loc=SL51823488-111719

+ Details

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

- Definition

Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 4D
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=64830801&loc=SL51823488-111719

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (a),(c)
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624163-113959

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226000-175313

+ Details

Name:	us-gaap_DerivativeFairValueOfDerivativeLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativesFairValueLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_HedgingDesignationAxis=us-gaap_DesignatedAsHedgingInstrumentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BalanceSheetLocationAxis=us-gaap_OtherCurrentAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BalanceSheetLocationAxis=us-gaap_AccruedLiabilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_CashFlowHedgingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_CommodityContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_HedgingDesignationAxis=us-gaap_NondesignatedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: