Amount of interest expense payable as of the balance sheet date on a debt or other obligation to a related party.

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Amount of interest income earned from interest-bearing assets owed to the entity by related party.

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For an unclassified balance sheet, amounts due from parties associated with the reporting entity as evidenced by a written promise to pay.

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Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Related Party Transactions - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Related Party Transaction [Line Items]
Related parties	$ 1,074	$ 2,175	$ 8,481	$ 6,567
Due from affiliates	87,670		87,670		$ 82,162
Related parties note receivable, RED Consolidated Holdings, LLC
Related Party Transaction [Line Items]
Due from affiliates	$ 3,903		$ 3,903		4,796
Note receivable, interest rate	5.25%		5.25%
Interest income, related party	$ 55	66	$ 172	204
Northwestern Mutual Life (NML)
Related Party Transaction [Line Items]
Interest expense, related party	2,102	2,175	6,380	6,567
Interest expense payable, related party	699		699		716
Joint Venture \| Financing Arrangement
Related Party Transaction [Line Items]
Related parties	(1,028)	0	2,101	0
Unconsolidated Joint Ventures
Related Party Transaction [Line Items]
Due from affiliates	9,482		9,482		5,411
Affiliated Entity \| Notes Receivable \| Fashion Outlets of San Francisco
Related Party Transaction [Line Items]
Interest income, related party	808	$ 621	2,330	$ 1,839
Note receivable	$ 74,285		$ 74,285		$ 71,955
Affiliated Entity \| Notes Receivable \| Fashion Outlets of San Francisco \| LIBOR
Related Party Transaction [Line Items]
Note receivable, interest rate	2.00%		2.00%