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Investments In Direct Financing Leases (Narrative) (Details) (USD $)
0 Months Ended 9 Months Ended 12 Months Ended
Apr. 02, 2014
properties
Jul. 13, 2012
Sep. 30, 2014
Dec. 31, 2014
Dec. 31, 2013
properties
Dec. 31, 2012
properties
Apr. 03, 2014
Initial direct costs       $ 1,500,000us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeasesInitialDirectCosts $ 1,700,000us-gaap_CapitalLeasesNetInvestmentInDirectFinancingLeasesInitialDirectCosts    
Allowance for lease losses       0us-gaap_ProvisionForLeaseLosses 0us-gaap_ProvisionForLeaseLosses    
Investment in a direct financing lease, net       199,332,000us-gaap_NetInvestmentInDirectFinancingAndSalesTypeLeases 242,212,000us-gaap_NetInvestmentInDirectFinancingAndSalesTypeLeases   45,900,000us-gaap_NetInvestmentInDirectFinancingAndSalesTypeLeases
Proceeds from Sale of Lease Receivables       46,092,000us-gaap_ProceedsFromSaleOfLeaseReceivables 0us-gaap_ProceedsFromSaleOfLeaseReceivables 4,494,000us-gaap_ProceedsFromSaleOfLeaseReceivables  
Payments to Acquire Lease Receivables       0us-gaap_PaymentsToAcquireLeaseReceivables 3,262,000us-gaap_PaymentsToAcquireLeaseReceivables 0us-gaap_PaymentsToAcquireLeaseReceivables  
number of properties sold 4epr_Numberofpropertiessold       5epr_Numberofpropertiessold 2epr_Numberofpropertiessold  
Proceeds from Sale of Property, Plant, and Equipment 46,100,000us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment     4,100,000us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment      
originalacquisitioncost             41,500,000epr_Originalacquisitioncost
Gain (Loss) on Disposition of Property Plant Equipment   $ 0us-gaap_GainLossOnSaleOfPropertyPlantEquipment $ 200,000us-gaap_GainLossOnSaleOfPropertyPlantEquipment        
Maximum [Member]              
Length of lease (in years)       20epr_LengthOfLeaseInYears
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
     
Minimum [Member]              
Length of lease (in years)       17epr_LengthOfLeaseInYears
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
     
Imagine Schools [Member]              
Number of public charter school properties       23us-gaap_NumberOfRealEstateProperties
/ us-gaap_LeaseArrangementTypeAxis
= epr_ImagineSchoolsMember
27us-gaap_NumberOfRealEstateProperties
/ us-gaap_LeaseArrangementTypeAxis
= epr_ImagineSchoolsMember