FAIR VALUE OF FINANCIAL INSTRUMENTS (Fair Value, by Balance Sheet Grouping) (Details) RSO (Resource Capital Corp [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Sep. 30, 2012
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held-for-investment	$ 1,793,780	$ 1,699,798
Loans receivable-related party	8,324	9,116
CDO notes	1,614,883	1,505,114
Junior subordinated notes	50,814	50,767
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held-for-investment	1,848,617	1,746,421
Loans receivable-related party	8,324	9,116
CDO notes	1,405,124	1,235,358
Junior subordinated notes	17,308	17,261
Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held-for-investment	0	0
Loans receivable-related party	0	0
CDO notes	0	0
Junior subordinated notes	0	0
Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held-for-investment	1,186,642	1,113,128
Loans receivable-related party	0	0
CDO notes	1,405,124	1,235,358
Junior subordinated notes	0	0
Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held-for-investment	661,975	633,293
Loans receivable-related party	8,324	9,116
CDO notes	0	0
Junior subordinated notes	$ 17,308	$ 17,261