Name:	rexi_ImpairedFinancingReceivablesAbstract
Namespace Prefix:	rexi_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5212-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 17

-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5258-111524

+ Details

Name:	us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 14A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953550-111524

+ Details

Name:	us-gaap_ImpairedFinancingReceivableRecordedInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of allowance for credit losses related to recorded investment.

+ References

+ Details

Name:	us-gaap_ImpairedFinancingReceivableRelatedAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of unpaid principal balance of impaired financing receivables with related allowance for credit losses and without related allowance for credit losses.

+ References

+ Details

Name:	us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	rexi_FinancingReceivablesSpecificValuationAllowanceAxis=rexi_FinancingReceivablesWithoutSpecificValuationAllowanceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=rexi_RealEstateLimitedPartnershipMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=rexi_ReceivablesFromManagedEntitiesCommercialFinanceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=rexi_RentReceivablesRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

FINANCING RECEIVABLES (Impaired Financing Receivables) (Details) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2013	Dec. 31, 2014
Financing Receivables Without a Specific Valuation Allowance [Member]
Impaired financing receivables [Abstract]
Specific Allowance	$ 0		$ 0
Receivables from Managed Entities - Commercial Finance [Member] \| Financing Receivables With a Specific Valuation Allowance [Member]
Impaired financing receivables [Abstract]
Net Balance	1,327,000		1,295,000
Unpaid Balance	18,573,000		18,285,000
Specific Allowance	17,246,000		16,990,000
Average Investment in Impaired Assets	19,561,000	18,882,000
Real Estate Limited Partnership [Member] \| Financing Receivables With a Specific Valuation Allowance [Member]
Impaired financing receivables [Abstract]
Net Balance	831,000
Unpaid Balance	944,000
Specific Allowance	113,000
Average Investment in Impaired Assets	596,000
Rent receivables - real estate [Member] \| Financing Receivables With a Specific Valuation Allowance [Member]
Impaired financing receivables [Abstract]
Net Balance	0
Unpaid Balance	0
Specific Allowance	1,000
Average Investment in Impaired Assets	$ 0