Quarterly report pursuant to Section 13 or 15(d)

Non-Controlling Interest (Details)

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Non-Controlling Interest (Details) - USD ($)
9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Noncontrolling Interest [Line Items]    
Exchange of operating partnership units to common stock (in shares) 3,703 0
Payment in cash for redemption of operating partnership units   $ 0
Maximum [Member]    
Noncontrolling Interest [Line Items]    
Outstanding OP units held by outside limited partners 1.00%