RESTATEMENT (Restatement - Balance Sheets) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011
ASSETS
Cash and cash equivalents	$ 19,439,000	$ 11,899,000	$ 19,393,000	$ 12,803,000
Receivables from managed entities and related parties, net	30,288,000	30,618,000
Investments in real estate, net	17,128,000	18,041,000
Investment securities, at fair value	9,758,000	10,576,000
Investments In Affiliates Subsidiaries Associates And Joint Ventures Excluding Advances	13,899,000	13,156,000
Assets of consolidated variable interest entity (VIE) - RSO:
Investment securities, at fair value	9,758,000	10,576,000
Total assets of consolidated VIE - RSO	2,271,468,000	2,476,557,000
Total assets	2,443,511,000	2,636,764,000	2,488,458,000
Liabilities:
Payables to managed entities and related parties	3,037,000	3,536,000
Borrowings	20,380,000
Liabilities of consolidated VIE - RSO:
Total liabilities of consolidated VIE - RSO	1,485,385,000	1,856,839,000
Liabilities	1,536,415,000	1,902,974,000
Commitments and contingencies
Equity:
Preferred stock	0	0
Common stock	299,000	295,000
Additional paid-in capital	288,238,000	286,048,000
Accumulated deficit	(26,420,000)	(29,486,000)
Treasury stock, at cost	(104,869,000)	(103,472,000)
Accumulated other comprehensive loss	(2,310,000)	(2,197,000)
Total stockholders’ equity	154,938,000	151,188,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	907,096,000	733,790,000
Liabilities and equity	2,443,511,000	2,636,764,000
As Previously Reported [Member]
ASSETS
Cash and cash equivalents			19,393,000	12,803,000
Assets of consolidated variable interest entity (VIE) - RSO:
Total assets of consolidated VIE - RSO		0
Total assets		190,330,000
Liabilities of consolidated VIE - RSO:
Liabilities		47,733,000
Equity:
Preferred stock		0
Common stock		295,000
Additional paid-in capital		286,048,000
Accumulated deficit		(27,137,000)
Treasury stock, at cost		(103,472,000)
Accumulated other comprehensive loss		(13,416,000)
Total stockholders’ equity		142,318,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		142,597,000
Liabilities and equity		190,330,000
Restatement Adjustments - RSO [Member]
Assets of consolidated variable interest entity (VIE) - RSO:
Total assets of consolidated VIE - RSO		2,478,251,000
Total assets		2,478,251,000
Liabilities of consolidated VIE - RSO:
Total liabilities of consolidated VIE - RSO		1,864,906,000
Liabilities		1,864,906,000
Equity:
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		613,345,000
Liabilities and equity		2,478,251,000
Restatement Adjustment - Intercompany Elimination [Member]
Assets of consolidated variable interest entity (VIE) - RSO:
Total assets of consolidated VIE - RSO		(1,694,000)
Total assets		(31,817,000)
Liabilities of consolidated VIE - RSO:
Total liabilities of consolidated VIE - RSO		(8,067,000)
Liabilities		(9,665,000)
Equity:
Preferred stock		0
Common stock		0
Additional paid-in capital		0
Accumulated deficit		(2,349,000)
Treasury stock, at cost		0
Accumulated other comprehensive loss		11,219,000
Total stockholders’ equity		8,870,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		(22,152,000)
Liabilities and equity		(31,817,000)
Consolidated Entity Excluding RSO [Member]
ASSETS
Cash and cash equivalents	19,439,000	11,899,000
Restricted cash	558,000	638,000
Receivables	3,348,000	468,000
Receivables from managed entities and related parties, net	30,288,000	30,618,000
Investments in real estate, net	17,128,000	18,041,000
Investment securities, at fair value	9,758,000	10,576,000
Investments in unconsolidated loan manager	37,345,000	37,221,000
Investments In Affiliates Subsidiaries Associates And Joint Ventures Excluding Advances	13,899,000	13,156,000
Assets of consolidated variable interest entity (VIE) - RSO:
Investment securities, at fair value	9,758,000	10,576,000
Property and equipment, net	4,955,000	2,590,000
Deferred tax assets, net	29,751,000	28,274,000
Other assets	5,574,000	6,726,000
Liabilities:
Accrued expenses and other liabilities	27,613,000	21,559,000
Payables to managed entities and related parties	3,037,000	3,536,000
Borrowings	20,380,000	21,040,000
Equity:
Accumulated other comprehensive loss	(2,310,000)	(2,197,000)
Noncontrolling interests	218,000	279,000
Consolidated Entity Excluding RSO [Member] | As Previously Reported [Member]
ASSETS
Cash and cash equivalents		11,899,000	19,393,000	12,803,000
Restricted cash		638,000
Receivables		468,000
Receivables from managed entities and related parties, net		38,685,000
Investments in real estate, net		18,041,000
Investment securities, at fair value		25,533,000
Investments in unconsolidated loan manager		37,221,000
Investments In Affiliates Subsidiaries Associates And Joint Ventures Excluding Advances		13,156,000
Assets of consolidated variable interest entity (VIE) - RSO:
Investment securities, at fair value		25,533,000
Property and equipment, net		2,590,000
Deferred tax assets, net		35,373,000
Other assets		6,726,000
Liabilities:
Accrued expenses and other liabilities		21,556,000
Payables to managed entities and related parties		3,567,000
Borrowings		22,610,000
Equity:
Noncontrolling interests		279,000
Consolidated Entity Excluding RSO [Member] | Restatement Adjustment - Intercompany Elimination [Member]
ASSETS
Cash and cash equivalents		0
Restricted cash		0
Receivables		0
Receivables from managed entities and related parties, net		(8,067,000)
Investments in real estate, net		0
Investment securities, at fair value		(14,957,000)
Investments in unconsolidated loan manager		0
Investments In Affiliates Subsidiaries Associates And Joint Ventures Excluding Advances		0
Assets of consolidated variable interest entity (VIE) - RSO:
Investment securities, at fair value		(14,957,000)
Property and equipment, net		0
Deferred tax assets, net		(7,099,000)
Other assets		0
Liabilities:
Accrued expenses and other liabilities		3,000
Payables to managed entities and related parties		(31,000)
Borrowings		(1,570,000)
VIE - RSO [Member]
ASSETS
Investment securities, at fair value	232,783,000	256,433,000
Assets of consolidated variable interest entity (VIE) - RSO:
Cash and cash equivalents (including restricted cash)	203,658,000	179,390,000
Investment securities, at fair value	232,783,000	256,433,000
Loans	1,644,587,000	1,849,428,000
Investments, at fair value	128,099,000	120,706,000
Other assets	62,341,000	70,600,000
Liabilities of consolidated VIE - RSO:
Borrowings	1,422,430,000	1,785,600,000
Other liabilities	62,955,000	71,239,000
Equity:
Noncontrolling interests	751,940,000	582,323,000
VIE - RSO [Member] | As Previously Reported [Member]
Equity:
Noncontrolling interests		0
VIE - RSO [Member] | Restatement Adjustments - RSO [Member]
ASSETS
Investment securities, at fair value		256,433,000
Assets of consolidated variable interest entity (VIE) - RSO:
Cash and cash equivalents (including restricted cash)		179,390,000
Investment securities, at fair value		256,433,000
Loans		1,850,998,000
Investments, at fair value		120,799,000
Other assets		70,631,000
Liabilities of consolidated VIE - RSO:
Borrowings		1,785,600,000
Other liabilities		79,306,000
Equity:
Noncontrolling interests		613,345,000
VIE - RSO [Member] | Restatement Adjustment - Intercompany Elimination [Member]
ASSETS
Investment securities, at fair value		0
Assets of consolidated variable interest entity (VIE) - RSO:
Cash and cash equivalents (including restricted cash)		0
Investment securities, at fair value		0
Loans		(1,570,000)
Investments, at fair value		(93,000)
Other assets		(31,000)
Liabilities of consolidated VIE - RSO:
Borrowings		0
Other liabilities		(8,067,000)
Equity:
Noncontrolling interests		$ (31,022,000)