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Related Party Transactions Related Party Transactions - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Related Party Transaction [Line Items]
Interest expense, related party	$ 2,211	$ 2,272
Due from affiliates	80,195		$ 68,227
Related parties note receivable, RED Consolidated Holdings, LLC
Related Party Transaction [Line Items]
Due from affiliates	$ 5,397		5,593
Note receivable, interest rate (percent)	5.25%
Interest income, related party	$ 70	117
Northwestern Mutual Life (NML)
Related Party Transaction [Line Items]
Interest expense payable, related party	732		736
Unconsolidated Joint Ventures
Related Party Transaction [Line Items]
Due from affiliates	4,745
Due to affiliates			(6,809)
Affiliated Entity | Notes Receivable | Fashion Outlets of San Francisco
Related Party Transaction [Line Items]
Interest income, related party	611	$ 521
Note receivable	$ 70,053		$ 69,443
Affiliated Entity | Notes Receivable | LIBOR | Fashion Outlets of San Francisco
Related Party Transaction [Line Items]
Note receivable, interest rate (percent)	2.00%

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