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Earnings Per Share (Narrative) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Anitidlutive securities exluded from computation of earnings per share [Line Items]      
Exercise price range, lower limit $ 46.86us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit $ 45.20us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit $ 44.62us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit
Exercise price range, upper limit $ 65.50us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit $ 65.50us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit $ 65.50us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit
Series C Cumulative Convertible Preferred Share [Member]      
Anitidlutive securities exluded from computation of earnings per share [Line Items]      
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 1,900us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_StatementClassOfStockAxis
= epr_SeriesCCumulativeConvertiblePreferredShareMember
  1,900us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_StatementClassOfStockAxis
= epr_SeriesCCumulativeConvertiblePreferredShareMember
Series E Cumulative Convertible Preferred Share [Member]      
Anitidlutive securities exluded from computation of earnings per share [Line Items]      
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 1,600us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_StatementClassOfStockAxis
= epr_SeriesECumulativeConvertiblePreferredShareMember
  1,600us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_StatementClassOfStockAxis
= epr_SeriesECumulativeConvertiblePreferredShareMember
Stock Options [Member]      
Anitidlutive securities exluded from computation of earnings per share [Line Items]      
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 338us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
331us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
368us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember