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Related Party Transactions - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2017
Related Party Transaction [Line Items] |  |  |
Interest expense, related party | $ 10,169 | $ 2,211 |
Due from affiliates | 84,674 |  | $ 82,162
Related parties note receivable, RED Consolidated Holdings, LLC |  |  |
Related Party Transaction [Line Items] |  |  |
Due from affiliates | $ 4,590 |  | 4,796
Note receivable, interest rate | 5.25% |  |
Interest income, related party | $ 60 | 70 |
Northwestern Mutual Life (NML) |  |  |
Related Party Transaction [Line Items] |  |  |
Interest expense, related party | 2,147 | 2,211 |
Interest expense payable, related party | 710 |  | 716
Unconsolidated Joint Ventures |  |  |
Related Party Transaction [Line Items] |  |  |
Due from affiliates | 7,380 |  |
Due to affiliates |  |  | 5,411
Affiliated Entity | Notes Receivable | Fashion Outlets of San Francisco |  |  |
Related Party Transaction [Line Items] |  |  |
Interest income, related party | 749 | $ 611 |
Note receivable | $ 72,704 |  | $ 71,955
Affiliated Entity | Notes Receivable | Fashion Outlets of San Francisco | LIBOR |  |  |
Related Party Transaction [Line Items] |  |  |
Note receivable, interest rate | 2.00% |  |

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