FAIR VALUE OF FINANCIAL INSTRUMENTS (Unobservable Inputs Reconciliation) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Junior Subordinated Debt [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 113,621	$ 112,774	$ 114,091	$ 98,707
Liabilities (gains) losses	(204)	336	(674)	14,403
Ending balance	113,417	113,110	113,417	113,110
TPS Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	25,741	25,540
Assets gains (losses), including OTTI	(69)	86
Ending balance	25,672	25,626	25,672	25,626
TPS and TRUP CDOs [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance			25,896	22,058
Assets gains (losses), including OTTI			(224)	3,568
Ending balance	$ 25,672	$ 25,626	$ 25,672	$ 25,626