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Redeemable Noncontrolling Interest (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Redeemable Noncontrolling Interest [Roll Forward]    
Redeemable noncontrolling interest, beginning of period $ 3,113us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount  
Net income attributable to redeemable noncontrolling interest 14us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest 0us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest
Other comprehensive loss attributable to redeemable noncontrolling interest (216)us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToNoncontrollingInterest  
Redeemable noncontrolling interest, end of period $ 2,911us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount $ 0us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount