INVESTMENT SECURITIES (Narrative) (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2013 Issuer	Mar. 31, 2012	Dec. 31, 2012 Issuer
Equity Securities [Abstract]
Payments to acquire investments	$ 1,526,000	$ 136,000
Trading Securities [Abstract]
Realized gain on trading securities	517,000
Unrealized gain on trading securities	745,000
Other-than-Temporary Impairment Losses [Abstract]
Other-than-temporary impairment on investments	214,000	74,000
CLO Securities [Member]
CDO securities [Abstract]
Number of CDO issuers that represent the retained equity interest	7		5
Other-than-Temporary Impairment Losses [Abstract]
Other-than-temporary impairment on investments	214,000	74,000
CLO Securities [Member] | Apidos CLO II [Member]
CDO securities [Abstract]
Minimum investment requirement	2,000,000.0
Equity Securities [Member] | The Bancorp, Inc. [Member]
Equity Securities [Abstract]
Number of shares held (in shares)	18,972
Equity Securities [Member] | Resource Real Estate Diversified Income Fund [Member]
Equity Securities [Abstract]
Number of shares held (in shares)	10,000
Payments to acquire investments	$ 100,000