Investment Securities (Schedule of Trust Preferred Securities) (Details) (USD $) In Thousands, unless otherwise specified					3 Months Ended
	Mar. 31, 2014 Numberofloans	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2014 Preferred Term Securities IV [Member] Numberofloans	Mar. 31, 2014 Preferred Term Securities VII [Member] Numberofloans	Mar. 31, 2014 TPREF Funding II [Member] Numberofloans	Mar. 31, 2014 TPREF Funding III [Member] Numberofloans	Mar. 31, 2014 Trapeza CDO I, LLC [Member] Numberofloans	Mar. 31, 2014 ALESCO Preferred Funding IV [Member] Numberofloans	Mar. 31, 2014 ALESCO Preferred Funding V [Member] Numberofloans	Mar. 31, 2014 Trust Preferred Securities [Member]	Dec. 31, 2013 Trust Preferred Securities [Member]
Schedule of Investments [Line Items]
Class / Tranche					Mezzanine Notes	Mezzanine Notes	Class B Notes	Class B2 Notes	Class C1 Notes	Class B1 Notes	Class C1 Notes
Available-for-sale Securities, Amortized Cost	$ 203,618	$ 209,303			$ 49	$ 989	$ 739	$ 1,520	$ 556	$ 604	$ 820	$ 5,277	$ 5,277
Investment securities available for sale, at fair value	201,262	204,891			39	721	329	665	294	362	397	2,807	2,850
Unrealized Losses	(5,200)	(7,167)			(10)	(268)	(410)	(855)	(262)	(242)	(423)	(2,470)	(2,427)
Lowest Credit Rating Assigned					B	C	C	C	C	C	C
Number of banks currently performing	138				6	11	17	15	9	41	39
Deferrals / Defaults as % of Current Balance	32.00%				18.00%	54.00%	41.00%	35.00%	49.00%	8.00%	24.00%
Conditional Default Rates for 2014 and beyond					0.36%	0.38%	0.40%	0.31%	0.35%	0.34%	0.35%
Cumulative OTTI Life to Date	$ 3,959	$ 3,959	$ 3,959	$ 3,959	$ 0	$ 2,173	$ 260	$ 480	$ 470	$ 396	$ 180