SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Accounting for Income Taxes) (Details) (Minimum [Member])	Sep. 30, 2012
Minimum [Member]
Income Tax Contingency [Line Items]
Percentage of benefit from tax position that will be realized upon settlment	0.00%

Percentage of benefit from tax position that will be realized upon settlment.

No definition available.

Name:	rexi_PercentageOfBenefitFromTaxPositionThatWillBeRealizedUponSettlment
Namespace Prefix:	rexi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant