Derivative Instruments (Effect Of Derivative Instruments Designated As Cash Flow Hedges On Statements Of Operations) (Details) (USD $) In Thousands	3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended
Jun. 30, 2010 Other Income (Expense) [Member] Currency Hedge Contracts [Member]	Jun. 30, 2010 Other Income (Expense) [Member] Currency Hedge Contracts [Member]	Jun. 30, 2011 Interest Rate Swap [Member] Interest (Expense) [Member]	Jun. 30, 2011 Interest Rate Swap [Member] Interest (Expense) [Member]
Amount of Gain (Loss) Recognized in AOCI Effective Portion	$ (1,018)	$ (1,734)	$ (2,958)	$ (2,781)
Amount of Gain (Loss) Reclassified from AOCI Into Earnings-Effective Portion	$ (1,009)	$ (1,718)	$ (570)	$ (1,143)

The income statement location of the effective portion of net gain or loss reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 205G

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44C
-Subparagraph b
-Clause 3

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Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration