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Variable Interest Entities (Narrative) (Details) (SVVI [Member], USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
SVVI [Member]
 
Investment in unconsolidated VIE $ 191.1us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= epr_SvviMember