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Income Taxes (Changes In Gross Liability For Unrecognized Tax Benefits Excluding Interest And Penalties) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]    
Unrecognized tax benefits, beginning of period $ 63,057us-gaap_UnrecognizedTaxBenefits $ 48,752us-gaap_UnrecognizedTaxBenefits
Increase in unrecognized tax benefits for tax positions taken in a prior period 900us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions 9,713us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions
Decrease in unrecognized tax benefits for tax positions taken in a prior period (4,989)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions (4,335)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions
Increase in unrecognized tax benefits for tax positions taken in the current period 5,876us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions 11,142us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions
Statute lapses 0us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations (336)us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations
Settlements with taxing authorities (644)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities (1,879)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities
Unrecognized tax benefits, end of period $ 64,200us-gaap_UnrecognizedTaxBenefits $ 63,057us-gaap_UnrecognizedTaxBenefits