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Redeemable Noncontrolling Interests Activity (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2015
Noncontrolling Interest [Abstract]    
Beginning balance $ 204,611us-gaap_RedeemableNoncontrollingInterestEquityCommonCarryingAmount $ 206,089us-gaap_RedeemableNoncontrollingInterestEquityCommonCarryingAmount
Net earnings 4,628us-gaap_TemporaryEquityIssuePeriodIncreaseOrDecrease  
Distributions (3,154)us-gaap_TemporaryEquityNetIncome  
Non-cash contributions 4us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment  
Ending balance $ 206,089us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests