CERTAIN RELATIONSHIPS AND RELATED PARTY TRANSACTIONS (Fees From Unconsolidated Investment Entities) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Commercial Finance, Four Investment Entities [Member]
Related Party Transaction [Line Items]
Amount waived of the fund management fees from commercial finance investment entities	$ 1,800,000	$ 3,900,000	$ 7,200,000
Real estate [Member]
Related Party Transaction [Line Items]
Fees from unconsolidated investment entities	23,356,000	17,550,000	13,555,000
Discounts recorded	179,000	678,000	475,000
Financial fund management [Member]
Related Party Transaction [Line Items]
Fees from unconsolidated investment entities	3,115,000	3,093,000	3,647,000
Commercial Finance [Member]
Related Party Transaction [Line Items]
Fees from unconsolidated investment entities	0	0	0
CVC Credit Partners, L.P. [Member]
Related Party Transaction [Line Items]
Reimbursement of related party costs	1,195,000	2,082,000	0
RRE Opportunity REIT [Member]
Related Party Transaction [Line Items]
Reimbursement of related party costs	1,633,000	844,000	1,515,000
Dividends paid	114,000	14,000	0
LEAF [Member]
Related Party Transaction [Line Items]
Reimbursement of related party costs	213,000	287,000	60,000
Payment for sub-servicing the commercial finance investment partnerships	(898,000)	(2,149,000)	(405,000)
Payment for rent and related costs	(543,000)	(763,000)	(120,000)
1845 Walnut Associates Ltd. [Member]
Related Party Transaction [Line Items]
Payment for rent and operating expenses	(702,000)	(685,000)	(651,000)
Property management fees	122,000	0	0
Brandywine Construction & Management, Inc. [Member]
Related Party Transaction [Line Items]
Payment for property management of hotel property	(226,000)	(211,000)	(215,000)
Atlas Energy, L.P. [Member]
Related Party Transaction [Line Items]
Reimbursement of related party costs	240,000	609,000	1,049,000
Ledgewood P.C. [Member]
Related Party Transaction [Line Items]
Payment for legal services	(240,000)	(462,000)	(669,000)
Graphic Images, LLC [Member]
Related Party Transaction [Line Items]
Payment for printing services	(179,000)	(235,000)	(119,000)
The Bancorp, Inc. [Member]
Related Party Transaction [Line Items]
Reimbursement of related party costs	114,000	118,000	79,000
9 Henmar LLC [Member]
Related Party Transaction [Line Items]
Payment of broker/consulting fees	$ (41,000)	$ (47,000)	$ (47,000)