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SALES OF SUBSIDIARY AND BUSINESS UNITS - Summary of gain on sale of disposal group (Details) - USD ($)
$ in Thousands
3 Months Ended
Jun. 30, 2016
Mar. 31, 2017
Dec. 31, 2016
May 05, 2016
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)   $ (432,805) $ (482,494)  
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 2,370     $ 2,400
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 $ 3,694