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Related Party Transactions - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Related Party Transaction [Line Items] |  |  |  |
Interest (income) expense from related party transactions |  | $ (62,517) | $ 6,883 | $ 8,731
Due (to) from affiliates | $ 6,157 | 6,157 | 85,181 |
Related Parties Note Receivable, RED Consolidated Holdings, LLC |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Due (to) from affiliates |  |  | $ 3,689 |
Notes receivable interest rate |  |  | 5.25% |
Interest earned |  | 141 | $ 224 | 268
Joint venture | Financing arrangement |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Interest (income) expense from related party transactions | (62,517) | (62,517) | 230 |
Unconsolidated joint ventures |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Due (to) from affiliates | $ 6,157 | 6,157 | 6,385 |
Affiliated entity | Northwestern Mutual Life (NML) |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Interest expense, related party |  |  | 6,653 | 8,731
Affiliated entity | Notes receivable | Fashion Outlets of San Francisco |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Interest earned |  | $ 1,112 | 3,152 | $ 2,513
Note receivable |  |  | $ 75,107 |
Affiliated entity | Notes receivable | Fashion Outlets of San Francisco | LIBOR |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Notes receivable interest rate |  |  | 2.00% |

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