CONSOLIDATING FINANCIAL INFORMATION (Consolidating Statements of Cash Flows) (Details) (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 68,374,000us-gaap_ProfitLoss	$ 52,027,000us-gaap_ProfitLoss	$ 87,145,000us-gaap_ProfitLoss
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	1,937,000
Provision for credit losses	3,058,000us-gaap_ProvisionForDoubtfulAccounts	4,265,000us-gaap_ProvisionForDoubtfulAccounts	20,148,000us-gaap_ProvisionForDoubtfulAccounts
Unrealized loss (gain) on trading securities	210,000
Equity in earnings of unconsolidated entities	(4,199,000)	(5,389,000)	(4,083,000)
Distributions from unconsolidated entities	6,759,000
Impairment loss recognized in earnings	(12,000)us-gaap_GainLossOnSaleOfLoansAndLeases
Gain on sale of loans and investment securities, net	(1,850,000)us-gaap_GainLossOnSaleOfInvestments
Gain on sale of assets	(445,000)us-gaap_GainLossOnDispositionOfAssets
Deferred income tax provision	5,388,000
Equity-based compensation expense	2,003,000us-gaap_ShareBasedCompensation
Trading securities purchases and sales, net	1,588,000
Changes in operating assets and liabilities	(5,547,000)
Net cash provided by (used in) operating activities	127,836,000	(109,627,000)	17,484,000
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(430,000)
Principal payments received on real estate loans and real estate	25,000
Investments in unconsolidated real estate entities	(1,709,000)
Principal payments on leases and loans	22,000
Principal payments and proceeds from sales received by consolidated VIE - RSO	858,751,000
Proceeds From Sale Of Loans And Investment Securities	796,000
(Decrease) increase in restricted cash of consolidated VIE - RSO	(23,568,000)
Other investing activity of consolidated VIE - RSO	(24,082,000)
Net cash (used in) provided by investing activities	(399,128,000)	486,256,000	89,641,000
CASH FLOWS FROM FINANCING ACTIVITIES:
Increase in borrowings	2,520,000us-gaap_ProceedsFromIssuanceOfDebt
Principal payments on borrowings	(2,929,000)
Net borrowings (repayments) of debt by consolidated VIE - RSO	207,604,000us-gaap_ProceedsFromRepaymentsOfDebt
Dividends paid	(4,272,000)us-gaap_PaymentsOfDividendsCommonStock
Dividends paid on common stock by consolidated VIE - RSO	(101,936,000)us-gaap_PaymentsOfDividends
Proceeds from issuance of common stock	15,584,000
Repurchases of common stock	(10,591,000)
Proceeds from (Repayments of) Restricted Cash, Financing Activities	(154,000)
Net cash provided by (used in) financing activities	278,981,000	(368,304,000)	(106,752,000)
Increase in cash	7,689,000	7,954,000	(904,000)
Cash	27,542,000	19,853,000	11,899,000
Reportable Legal Entities [Member]
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Net cash provided by (used in) operating activities	50,604,000
Consolidation, Eliminations [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	(2,901,000)
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Unrealized loss (gain) on trading securities	(22,000)
Equity in earnings of unconsolidated entities	483,000
Gain on sale of loans and investment securities, net	95,000
Net cash provided by (used in) operating activities	(2,377,000)
CASH FLOWS FROM INVESTING ACTIVITIES:
Other investing activity of consolidated VIE - RSO	(479,000)
Net cash (used in) provided by investing activities	(479,000)
CASH FLOWS FROM FINANCING ACTIVITIES:
Principal payments on borrowings	392,000
Dividends paid on common stock by consolidated VIE - RSO	2,289,000
Other	175,000
Net cash provided by (used in) financing activities	2,856,000
RAI [Member]
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	1,937,000	2,140,000	2,338,000
Provision for credit losses	3,058,000	4,265,000	20,148,000
Unrealized loss (gain) on trading securities	210,000	(1,054,000)	(1,272,000)
Equity in earnings of unconsolidated entities	(4,199,000)	(5,389,000)	(4,083,000)
Distributions from unconsolidated entities	6,759,000	4,647,000	3,311,000
Impairment loss recognized in earnings	(12,000)	0	0
Gain on sale of loans and investment securities, net	(1,850,000)	(6,293,000)	(1,221,000)
Gain on sale of assets	(445,000)	(1,734,000)	(915,000)
Deferred income tax provision	5,388,000	25,000	11,836,000
Equity-based compensation expense	2,003,000	1,257,000	993,000
Trading securities purchases and sales, net	1,588,000	10,287,000	(2,876,000)
Changes in operating assets and liabilities	(5,547,000)	2,840,000	(4,983,000)
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(430,000)	(2,730,000)	(196,000)
Principal payments received on real estate loans and real estate	25,000	2,049,000	888,000
Investments in unconsolidated real estate entities	(1,709,000)	(1,545,000)	(2,493,000)
Principal payments on leases and loans	22,000	17,000	15,000
Purchase of loans and investments	(8,222,000)	(3,213,000)	(2,597,000)
Proceeds From Sale Of Loans And Investment Securities	0	0	55,000
CASH FLOWS FROM FINANCING ACTIVITIES:
Increase in borrowings	2,520,000	2,001,000	0
Principal payments on borrowings	(2,929,000)	(2,486,000)	(5,715,000)
Dividends paid	(4,272,000)	(1,988,000)	(2,334,000)
Proceeds from issuance of common stock	15,584,000	1,252,000	2,131,000
Repurchases of common stock	(10,591,000)	(4,607,000)	(2,463,000)
Other	0	67,000	(203,000)
Cash	27,542,000	19,853,000
RAI [Member] \| Reportable Legal Entities [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	9,107,000
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	1,937,000
Provision for credit losses	3,058,000	4,265,000	20,148,000
Unrealized loss (gain) on trading securities	232,000
Equity in earnings of unconsolidated entities	(4,682,000)	(5,389,000)	(4,083,000)
Distributions from unconsolidated entities	6,759,000
Impairment loss recognized in earnings	(12,000)
Gain on sale of loans and investment securities, net	(1,945,000)
Gain on sale of assets	(445,000)
Deferred income tax provision	5,388,000
Equity-based compensation expense	2,003,000
Trading securities purchases and sales, net	1,588,000
Changes in operating assets and liabilities	(5,547,000)
Net cash provided by (used in) operating activities	17,441,000
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(430,000)
Principal payments received on real estate loans and real estate	25,000
Investments in unconsolidated real estate entities	(1,709,000)
Principal payments on leases and loans	22,000
Purchase of loans and investments	(8,222,000)
Proceeds From Sale Of Loans And Investment Securities	796,000
Net cash (used in) provided by investing activities	(9,518,000)
CASH FLOWS FROM FINANCING ACTIVITIES:
Increase in borrowings	2,520,000
Principal payments on borrowings	(3,321,000)
Dividends paid	(4,272,000)
Proceeds from issuance of common stock	15,584,000
Repurchases of common stock	(10,591,000)
Proceeds from (Repayments of) Restricted Cash, Financing Activities	(154,000)
Net cash provided by (used in) financing activities	(234,000)
Increase in cash	7,689,000
Cash	27,542,000	19,853,000
RAI [Member] \| Consolidation, Eliminations [Member]
CASH FLOWS FROM FINANCING ACTIVITIES:
Cash	0
RSO [Member]
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Net cash provided by (used in) operating activities	50,572,000
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of loans and investments	(1,200,711,000)	(861,939,000)	(769,762,000)
Principal payments and proceeds from sales received by consolidated VIE - RSO	858,751,000	1,367,346,000	797,011,000
(Decrease) increase in restricted cash of consolidated VIE - RSO	(23,568,000)	22,248,000	50,756,000
Other investing activity of consolidated VIE - RSO	(24,082,000)	(35,977,000)	(1,896,000)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net borrowings (repayments) of debt by consolidated VIE - RSO	207,604,000	(420,107,000)	(192,783,000)
Dividends paid on common stock by consolidated VIE - RSO	(101,936,000)	(91,255,000)	(71,876,000)
Proceeds from issuance of common stock	196,198,000	189,991,000	171,056,000
Other	(23,043,000)	(41,172,000)	(4,565,000)
RSO [Member] \| Reportable Legal Entities [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	62,168,000
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Net cash provided by (used in) operating activities	112,772,000
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of loans and investments	(1,200,711,000)
Principal payments and proceeds from sales received by consolidated VIE - RSO	858,751,000
(Decrease) increase in restricted cash of consolidated VIE - RSO	(23,568,000)
Other investing activity of consolidated VIE - RSO	(23,603,000)
Net cash (used in) provided by investing activities	(389,131,000)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net borrowings (repayments) of debt by consolidated VIE - RSO	207,604,000
Dividends paid on common stock by consolidated VIE - RSO	(104,225,000)
Proceeds from issuance of common stock	196,198,000
Other	(23,218,000)
Net cash provided by (used in) financing activities	276,359,000
RSO [Member] \| Consolidation, Eliminations [Member]
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Net cash provided by (used in) operating activities	$ (32,000)

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- Definition

The net cash outflow or inflow from other investing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

-Section 45

-Paragraph 9

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3098-108585

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- Definition

The cash outflow to reacquire common stock during the period.

+ References

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- Definition

Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests.

+ References

+ Details

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- Definition

Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.

+ References

+ Details

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- Definition

The cash outflow associated with the purchase of all investments (debt, security, other) during the period.

+ References

+ Details

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- Definition

The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

+ References

+ Details

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- Definition

The cash inflow from the additional capital contribution to the entity.

+ References

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Data Type:	xbrli:monetaryItemType
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- Definition

The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

+ References

No definition available.

+ Details

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- Definition

The net cash inflow or outflow from other financing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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- Definition

Amount of cash inflow (outflow) from sales and purchases of trading securities.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-Topic 320

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- Definition

The cash inflow from repayments of the balance excluding interest (principal) on loans receivable and leases held for investment purposes.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Paragraph 12

-Subparagraph (a)

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Definition

The cash inflow from the sale of real estate held-for-investment and real estate joint ventures.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

The net cash inflow or outflow in aggregate debt due to repayments and proceeds from additional borrowings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

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- Definition

The net cash inflow or outflow from cash and cash items that are not available for withdrawal or usage.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Paragraph 15

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- Definition

The cash inflow associated with the sale and collection of loans receivables arising from the financing of goods and services.

+ References

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- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Paragraph 4J

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- Definition

Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable.

+ References

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- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt and payment of capital lease obligations.

+ References

No definition available.

+ Details

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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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