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Related-Party Transactions: (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Related party transactions |  |  |
Interest expense, related party | $ 15,016 | $ 15,386 | $ 16,743
Loans to unconsolidated joint ventures | 2,756 | 3,345 |
Due from affiliates | 30,132 | 17,068 |
Related Parties Note Receivable, AWE Talisman Company |  |  |
Related party transactions |  |  |
Interest income, related party | 625 | 478 |
Notes receivable interest rate | 5.00% | 5.00% |
Number of notes receivable | 2 | 2,000 |
Carrying value of term loan | 13,603 | 12,500 |
Related Parties Note Receivable, RED Consolidated Holdings, LLC |  |  |
Related party transactions |  |  |
Interest income, related party | 525 |  |
Due from affiliates | 12,707 |  |
Notes receivable interest rate | 5.25% |  |
Unconsolidated joint ventures |  |  |
Related party transactions |  |  |
Interest income, related party | 281 | 254 | 276
Due from affiliates | 3,822 | 4,568 |
Northwestern Mutual Life (NML) |  |  |
Related party transactions |  |  |
Interest expense payable, related party | 1,240 | 1,264 |
Unconsolidated joint ventures and third-party managed properties |  |  |
Related party transactions |  |  |
Management Fees | 21,993 | 24,007 | 26,838
Development and Leasing Fees | 10,859 | 13,165 | 9,955
Fees charged to unconsolidated joint ventures and third-party managed properties | $ 32,852 | $ 37,172 | $ 36,793

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