Nature of Business and Financial Statement Presentation - Non-cash Investing and Financing Activities (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Other Significant Noncash Transactions [Line Items]
Accounts payable related to construction in progress	$ 8,200	$ 11,400
Receivable and reduction of real estate assets, net - related to hurricane	7,800	59,700
Dividends declared	45,406	78,400	$ 78,549
Conversion of Operating Partnership Units	900	0
Retail Value Inc. [Member]
Other Significant Noncash Transactions [Line Items]
Contribution of net assets to RVI	663,400	0
Building [Member]
Other Significant Noncash Transactions [Line Items]
Assumption of building due to ground lease termination	$ 2,200	$ 8,600