FAIR VALUE (Fair Value of Financial Instruments) (Details) - Recurring Basis [Member] - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Carrying Amount [Member]
Liabilities:
Real estate debt	$ 9,932	$ 10,088
Senior Notes	10,000	10,000
Other debt	964	324
Total liabilities at fair value	20,896	20,412
Fair Value [Member]
Liabilities:
Real estate debt	10,932	11,197
Senior Notes	12,515	12,820
Other debt	964	324
Total liabilities at fair value	$ 24,411	$ 24,341

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This element represents the fair value of real estate debt.

No definition available.

Name:	rexi_RealEstateDebtFairValueDisclosure
Namespace Prefix:	rexi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant