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Related Party Transactions Related Party Transactions - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Related Party Transaction [Line Items]
Interest expense, related party	$ 2,224	$ 2,690	$ 6,752	$ 8,128
Due from affiliates	69,481		69,481		$ 83,928
Related parties note receivable, RED Consolidated Holdings, LLC
Related Party Transaction [Line Items]
Due from affiliates	$ 5,822		$ 5,822		9,252
Note receivable, interest rate (percent)	5.25%		5.25%
Interest income, related party	$ 81	128	$ 294	397
Northwestern Mutual Life (NML)
Related Party Transaction [Line Items]
Interest expense payable, related party	742		742		756
Unconsolidated Joint Ventures
Related Party Transaction [Line Items]
Due from affiliates	5,179		5,179
Due to affiliates					7,467
Affiliated Entity | Notes Receivable | Fashion Outlets of San Francisco
Related Party Transaction [Line Items]
Interest income, related party	583	$ 468	1,629	$ 1,351
Note receivable	$ 68,838		$ 68,838		$ 67,209
Affiliated Entity | Notes Receivable | LIBOR | Fashion Outlets of San Francisco
Related Party Transaction [Line Items]
Note receivable, interest rate (percent)	2.00%		2.00%

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