BORROWINGS, SUBORDINATED DEBENTURES AND BROKERED DEPOSITS (Details) (USD $)						9 Months Ended		9 Months Ended		9 Months Ended				9 Months Ended				9 Months Ended				9 Months Ended				9 Months Ended				9 Months Ended		9 Months Ended		1 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013 FHLB secured lines of credit	Sep. 30, 2013 Federal Reserve discount window	Sep. 30, 2013 Unsecured lines of credit	Sep. 30, 2013 Non-recourse notes	Dec. 31, 2012 Non-recourse notes	Sep. 30, 2013 Subordinated debentures	Mar. 31, 2012 Trust I and Trust CI	Sep. 30, 2013 Trust V	Oct. 28, 2013 Trust V	Jan. 28, 2013 Trust V	Dec. 31, 2012 Trust V	Sep. 30, 2013 Trust VI	Oct. 28, 2013 Trust VI	Jan. 28, 2013 Trust VI	Dec. 31, 2012 Trust VI	Sep. 30, 2013 Trust CII	Oct. 28, 2013 Trust CII	Jan. 28, 2013 Trust CII	Dec. 31, 2012 Trust CII	Sep. 30, 2013 Trust VII	Oct. 28, 2013 Trust VII	Jan. 28, 2013 Trust VII	Dec. 31, 2012 Trust VII	Sep. 30, 2013 Trust CIII	Oct. 28, 2013 Trust CIII	Jan. 28, 2013 Trust CIII	Dec. 31, 2012 Trust CIII	Sep. 30, 2013 Trust FCCI	Oct. 28, 2013 Trust FCCI	Sep. 30, 2013 Trust FCBI	Oct. 28, 2013 Trust FCBI	Mar. 31, 2012 FHLB advances	Sep. 30, 2013 FHLB advances	Dec. 31, 2012 FHLB advances	Sep. 30, 2013 Bank Federal Reserve discount window
Borrowings, subordinated debentures and brokered deposits
Weighted average interest rate on non-recourse debt (as a percent)						6.30%	6.28%
Weighted average remaining maturity of non-recourse debt						2 years
Outstanding FHLB advances																																			$ 0	$ 0
Remaining borrowing capacity			1,300,000,000
Carrying value of securities pledged	201,900,000																																		11,500,000
Borrowing capacity				467,800,000	80,000,000																																589,900,000
Gross subordinated debentures	135,055,000	108,250,000								10,310,000			10,310,000	10,310,000			10,310,000	5,155,000			5,155,000	61,856,000			61,856,000	20,619,000			20,619,000	16,495,000		10,310,000
Unamortized discount	(2,555,000)
Net subordinated debentures	132,500,000	108,250,000
Current Rate (as a percent)											3.35%	3.41%			3.30%	3.36%			3.20%	3.26%			2.99%	3.05%			1.94%	2.00%			1.85%		1.80%
Rate Index										3 month LIBOR				3 month LIBOR				3 month LIBOR				3 month LIBOR				3 month LIBOR				3 month LIBOR		3 month LIBOR
Spread on variable rate (as a percent)										3.10%				3.05%				2.95%				2.75%				1.69%				1.60%		1.55%
Number of months for which cumulative and among other requirements net earnings are not sufficient for dividend payments due for those periods, requiring prior notification to FRB								12 months
Debt termination expense related to prepayment of debt																																		22,600,000
Redemption of debt									18,600,000																									225,000,000
Brokered Deposits
Amount of customer deposits that were participated with other FDIC-insured financial institutions through the CDARS program as a means to provide FDIC deposit insurance coverage for the full amount of the entity's customer deposits	51,100,000	37,700,000
Noninterest-bearing brokered deposits amount included in liabilities of entity's discontinued operations	$ 104,800,000