Derivative Instruments (Fair Values Of Derivative Instruments) (Details) (Prepaid Expenses And Other Assets [Member], USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010	Sep. 30, 2010
Interest Rate Contracts [Member] \| Derivatives Designated As Hedges [Member]
Asset derivatives, notional amount	$ 30,000	$ 30,000	$ 30,000
Asset derivatives, fair value	1	7	4
Forward Currency Exchange Contracts [Member] \| Non-Designated Derivatives [Member]
Asset derivatives, notional amount	64,767	46,392	44,548
Asset derivatives, fair value	$ 311	$ (577)	$ 42

Fair value of derivative asset, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

Reference 1: 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=6935481&loc=SL5624163-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 44C

-Subparagraph a

-Clause 1

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 205G

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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