DISCONTINUED OPERATIONS - Assets and Liabilities (Details) - USD ($)	1 Months Ended	3 Months Ended		9 Months Ended
	Dec. 31, 2015	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Assets held for sale
Total assets held for sale, net	$ 22,062,000	$ 43,690,000		$ 43,690,000
Liabilities associated with assets held for sale
Total liabilities associated with assets held for sale	$ 10,252,000	$ 11,945,000		$ 11,945,000
Commercial real estate loan with variable rate
Liabilities associated with assets held for sale
Effective interest rate	9.77%	12.60%		12.60%
Lending division | Discontinued Operations, Held-for-sale or Disposed of by Sale
DISCONTINUED OPERATIONS
Transaction costs		$ 14,000	$ 111,000	$ 34,000	$ 335,000
Lending division | Held for sale
Assets held for sale
Loans receivable, net	$ 20,338,000	41,526,000		41,526,000
Cash and cash equivalents	1,471,000	546,000		546,000
Restricted cash	0	1,084,000		1,084,000
Accounts receivable and interest receivable, net	253,000	516,000		516,000
Other assets	0	18,000		18,000
Total assets held for sale, net	22,062,000	43,690,000		43,690,000
Liabilities associated with assets held for sale
Debt	10,000,000	9,897,000		9,897,000
Accounts payable and accrued expenses	230,000	166,000		166,000
Other liabilities	22,000	1,882,000		1,882,000
Total liabilities associated with assets held for sale	10,252,000	11,945,000		11,945,000
Principal balance of secured borrowings		9,967,000		9,967,000
Lending division | Held for sale | Commercial real estate loans
Assets held for sale
Loans receivable, net	20,338,000	$ 20,204,000		$ 20,204,000
Lending division | Commercial mortgage loans | Sold
DISCONTINUED OPERATIONS
Gain on disposition of assets held for sale	$ 5,151,000