UNSECURED BORROWINGS - Schedule of Subordinated Note Balances and Related Weighted Average Interest Rates (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Borrowings Outstanding	$ 98,216	$ 98,191
Effective interest rate	7.75%	7.75%
October 2035 [Member]
Debt Instrument [Line Items]
Borrowings Outstanding	$ 34,325	$ 34,315
Effective interest rate	7.89%	7.90%
Junior subordinated notes, maturity period	Oct. 31, 2035
Face amount of junior subordinated notes	$ 35,000
December 2035 [Member]
Debt Instrument [Line Items]
Borrowings Outstanding	$ 39,330	$ 39,320
Effective interest rate	7.66%	7.66%
Junior subordinated notes, maturity period	Dec. 31, 2035
Face amount of junior subordinated notes	$ 40,000
September 2036 [Member]
Debt Instrument [Line Items]
Borrowings Outstanding	$ 24,561	$ 24,556
Effective interest rate	7.70%	7.70%
Junior subordinated notes, maturity period	Sep. 30, 2036
Face amount of junior subordinated notes	$ 25,000