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SALES OF BRANCH, SUBSIDIARY AND BUSINESS UNITS - Summary of Gain from Sale (Details) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
May 05, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Less: net assets sold (carrying amount of The Palisades Group) |  | $ (38,900) | $ (482,494) |
Gain on sale of The Palisades Group |  | $ 0 | 0 | $ 163
The Palisades Group | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Liabilities forgiven by The Palisades Group |  |  | 1,862 |
Liabilities assumed by the Company |  |  | (1,078) |
The Note | $ 2,400 |  | 2,370 |
Aggregate fair value of consideration received |  |  | 3,154 |
Less: net assets sold (carrying amount of The Palisades Group) |  |  | (540) |
Gain on sale of The Palisades Group | $ 3,700 |  | $ 3,694 |

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