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Noncontrolling Interests (Effect Of Changes In Ownership Interest In Subsidiaries On Consolidated Equity) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Organization, Consolidation and Presentation of Financial Statements [Abstract]      
Net income adjusted for noncontrolling interests $ 288,008us-gaap_NetIncomeLoss $ 220,262us-gaap_NetIncomeLoss $ 146,640us-gaap_NetIncomeLoss
Transfers from the noncontrolling interests:      
Net increase (decrease) in equity for the acquisition of noncontrolling interests 11,015us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesPurchaseOfInterestByParent (16,177)us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesPurchaseOfInterestByParent 394us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesPurchaseOfInterestByParent
Change from net income adjusted for noncontrolling interests and transfers from the noncontrolling interests $ 299,023us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangeDueToNetIncomeAttributableToParentAndEffectsOfChangesNet $ 204,085us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangeDueToNetIncomeAttributableToParentAndEffectsOfChangesNet $ 147,034us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangeDueToNetIncomeAttributableToParentAndEffectsOfChangesNet