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Income Taxes (Schedule Of Gross Unrecognized Tax Benefits Reconciliation) (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2010
Income Tax Disclosure [Abstract]        
Undistributed Earnings of Foreign Subsidiaries $ 625,000,000us-gaap_UndistributedEarningsOfForeignSubsidiaries      
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]        
Balance of liability as of January 1 31,379,000us-gaap_UnrecognizedTaxBenefits 19,164,000us-gaap_UnrecognizedTaxBenefits   9,590,000us-gaap_UnrecognizedTaxBenefits
Increase as a result of tax positions taken during a prior year 2,014,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions 6,728,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions 5,941,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions  
Decrease as a result of tax positions taken during a prior year (1,153,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions (243,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions (25,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions  
Increase as a result of tax positions taken during the current year 11,155,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions 5,897,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions 3,893,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions  
Decrease as a result of settlements with taxing authorities (1,111,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities (28,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities 0us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities  
Reduction as a result of a lapse of the statute of limitations (1,583,000)us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations (139,000)us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations (235,000)us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations  
Balance of liability as of December 31 $ 40,701,000us-gaap_UnrecognizedTaxBenefits $ 31,379,000us-gaap_UnrecognizedTaxBenefits $ 19,164,000us-gaap_UnrecognizedTaxBenefits $ 9,590,000us-gaap_UnrecognizedTaxBenefits