Equity Incentive Plans (Schedule of Stock-option Expense to be Recognized in the Future) (Details) $ in Thousands	Dec. 31, 2016 USD ($)
Share-based Compensation [Abstract]
Stock option expense to be recognized in 2017	$ 692
Stock option expense to be recognized in 2018	287
Stock option expense to be recognized in 2019	0
Stock option expense to be recognized in 2020	0
Total Compensation Cost To Be Recognized, Stock Options	$ 979

Share-based Compensation, Stock Option Expense, Recognized in Year Three

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Share-based Compensation, Stock Option Expense, Recognized in Year Two

No definition available.

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Share-based Compensation, Stock Option Expense, To Be Recognized in One Year

No definition available.

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epr_ShareBasedCompensationStockOptionExpenseRecognizedInYearFour

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Unrecognized cost of unvested options awarded to employees as compensation.

No definition available.

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No definition available.

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