VARIABLE INTEREST ENTITIES LOANS HELD FOR INVESTMENT RSO (Details) - RSO [Member] - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Variable Interest Entity [Line Items]
Loans held for sale ($113.0 million and $113.4 million at fair value)	$ 116,001	$ 113,675
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	149,633	330,648
Loans Receivable Held-for-sale, Amount	116,001	113,675
Loans and Leases Receivable, Gross	152,627	330,930
Allowance for loan loss	47,284	4,613
Commercial Real Estate Loans [Member]
Variable Interest Entity [Line Items]
Amortized Cost	1,664,736	1,347,030
Allowance for loan loss	1,100	570
First Lien [Member]
Variable Interest Entity [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	146,651	325,726
Loans Receivable Held-for-sale, Amount	2,994	282
Second Lien [Member]
Variable Interest Entity [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	2,508	3,572
Third Lien [Member]
Variable Interest Entity [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	0	0
Defaulted First Lien [Member]
Variable Interest Entity [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	215	0
Defaulted Second Lien [Member]
Variable Interest Entity [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	259	1,350
Apidos Cinco CDO Ltd [Member]
Variable Interest Entity [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	149,633	249,328
Loans and Leases Receivable, Gross	152,474	249,610
Apidos Cinco CDO Ltd [Member] | First Lien [Member]
Variable Interest Entity [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	146,651	245,377
Loans Receivable Held-for-sale, Amount	2,841	282
Apidos Cinco CDO Ltd [Member] | Second Lien [Member]
Variable Interest Entity [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	2,508	3,572
Apidos Cinco CDO Ltd [Member] | Third Lien [Member]
Variable Interest Entity [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	0	0
Apidos Cinco CDO Ltd [Member] | Defaulted First Lien [Member]
Variable Interest Entity [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	215	0
Apidos Cinco CDO Ltd [Member] | Defaulted Second Lien [Member]
Variable Interest Entity [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	259	379
Apidos CDO III Ltd. [Member]
Variable Interest Entity [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	0	81,167
Loans and Leases Receivable, Gross	0	81,167
Apidos CDO III Ltd. [Member] | First Lien [Member]
Variable Interest Entity [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	0	80,196
Loans Receivable Held-for-sale, Amount	0	0
Apidos CDO III Ltd. [Member] | Second Lien [Member]
Variable Interest Entity [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	0	0
Apidos CDO III Ltd. [Member] | Third Lien [Member]
Variable Interest Entity [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	0	0
Apidos CDO III Ltd. [Member] | Defaulted First Lien [Member]
Variable Interest Entity [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	0	0
Apidos CDO III Ltd. [Member] | Defaulted Second Lien [Member]
Variable Interest Entity [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	0	971
Apidos CDO I Ltd. [Member]
Variable Interest Entity [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	0	153
Loans and Leases Receivable, Gross	153	153
Apidos CDO I Ltd. [Member] | First Lien [Member]
Variable Interest Entity [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	0	153
Loans Receivable Held-for-sale, Amount	153	0
Apidos CDO I Ltd. [Member] | Second Lien [Member]
Variable Interest Entity [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	0	0
Apidos CDO I Ltd. [Member] | Third Lien [Member]
Variable Interest Entity [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	0	0
Apidos CDO I Ltd. [Member] | Defaulted First Lien [Member]
Variable Interest Entity [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	0	0
Apidos CDO I Ltd. [Member] | Defaulted Second Lien [Member]
Variable Interest Entity [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Commercial	$ 0	$ 0
FLORIDA | Residential Mortgage Loans [Member]
Variable Interest Entity [Line Items]
Concentration of loan portfolio risk (in hundredths)	5.20%
Industry Grouping of Diversified/conglomerate Service [Member] | Commercial Real Estate Loans [Member]
Variable Interest Entity [Line Items]
Concentration of loan portfolio risk (in hundredths)	13.20%	8.50%
Industry Grouping of Automobile and Healthcare [Member] | Commercial Real Estate Loans [Member]
Variable Interest Entity [Line Items]
Concentration of loan portfolio risk (in hundredths)	12.50%	11.70%
Industry Grouping of Healthcare, Education and Childcare [Member] | Commercial Real Estate Loans [Member]
Variable Interest Entity [Line Items]
Concentration of loan portfolio risk (in hundredths)	9.60%	17.50%
NORTH CAROLINA | Residential Mortgage Loans [Member]
Variable Interest Entity [Line Items]
Concentration of loan portfolio risk (in hundredths)	4.10%
Middle-market Loans [Member]
Variable Interest Entity [Line Items]
Amortized Cost	$ 349,471	$ 250,113
Middle-market Loans [Member] | First Lien [Member]
Variable Interest Entity [Line Items]
Amortized Cost	221,961	149,287
Middle-market Loans [Member] | Second Lien [Member]
Variable Interest Entity [Line Items]
Amortized Cost	122,554	100,826
Middle-market Loans [Member] | Defaulted First Lien [Member]
Variable Interest Entity [Line Items]
Amortized Cost	0	0
Middle-market Loans [Member] | Defaulted Second Lien [Member]
Variable Interest Entity [Line Items]
Amortized Cost	4,956	0
Middle-market Loans [Member]
Variable Interest Entity [Line Items]
Loans held for sale ($113.0 million and $113.4 million at fair value)	345,400	$ 250,100
Allowance for loan loss	$ 4,086