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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