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RELATED-PARTY TRANSACTIONS (Details) $ in Thousands |  |  | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Apr. 10, 2017 USD ($) | Aug. 30, 2014 item | Jun. 30, 2017 USD ($) | Jun. 30, 2016 USD ($) | Jun. 30, 2017 USD ($) | Jun. 30, 2016 USD ($) | Dec. 31, 2016 USD ($) | Jun. 30, 2014 USD ($)
Related-party transactions |  |  |  |  |  |  |  |
Principal repayments |  |  |  |  | $ 403 |  |  |
Investment into the entity controlled by a related party |  |  | $ 28,425 |  | 28,425 |  | $ 20,873 |
Income (loss) from equity method investments |  |  | (1,330) | $ 266 | 1,774 | $ 2,335 |  |
Manager | Aircraft lease entered into during August 2014 |  |  |  |  |  |  |  |
Related-party transactions |  |  |  |  |  |  |  |
Expenses |  |  | 468 | 312 | 936 | 624 |  |
Number of other lessees | item |  | 2 |  |  |  |  |  |
Employees | Unsecured promissory notes |  |  |  |  |  |  |  |
Related-party transactions |  |  |  |  |  |  |  |
Unsecured promissory notes from employees |  |  | 928 |  | $ 928 |  | $ 922 |
Interest rates (as a percent) |  |  |  |  | 4.00% |  | 4.00% |
Principal repayments |  |  |  |  | $ 403 | 0 |  |
Interest income recognized |  |  |  |  | 13 | 8 |  |
Moelis Australia Holdings |  |  |  |  |  |  |  |
Related-party transactions |  |  |  |  |  |  |  |
Due to related party |  |  | 247 |  | 247 |  | $ 38 |
Income (loss) from equity method investments | $ (2,400) |  | (1,326) | 232 | 1,786 | 605 |  |
Moelis Asset Management LP |  |  |  |  |  |  |  |
Related-party transactions |  |  |  |  |  |  |  |
Fee for services |  |  | 291 | 349 | 604 | 711 |  |
Due from related party |  |  | 0 |  | 0 |  | $ 0 |
Investment into the entity controlled by a related party |  |  |  |  |  |  |  | $ 265
Income (loss) from equity method investments |  |  |  | 34 |  | 1,730 |  |
Cash distributions |  |  |  |  |  | 813 |  |
Revenue from related parties |  |  | $ 127 | $ 6,616 | $ 1,146 | $ 7,016 |  |

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