Name:	rexi_AmountAtRiskUnderFacilityAbstract
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Period Type:	duration

Weighted average date when the debt instrument is scheduled to be fully repaid, in free form syntax.

+ References

No definition available.

+ Details

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- Definition

Debt instrument, term, option to extend.

+ References

No definition available.

+ Details

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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Weighted Average Basis Spread on Variable Rate

+ References

No definition available.

+ Details

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Namespace Prefix:	rexi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Derivative, Description of Objective, Minimum Term of Securities To Be Covered

+ References

No definition available.

+ Details

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Data Type:	xbrli:durationItemType
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- Definition

The fee, expressed as a percentage of the line of credit facility, for the extension of credit facility.

+ References

No definition available.

+ Details

Name:	rexi_LineOfCreditFacilityExtensionFeePercentage
Namespace Prefix:	rexi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Carrying amount of assets sold under agreements to repurchase when the carrying amount (or market value, if higher than the carrying amount) of securities or other assets sold under repurchase agreements exceeds 10 percent of total assets.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(m)(1)(i)(A)(i))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph m

-Subparagraph 1

-Article 4

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13433-108611

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13476-108611

+ Details

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

- Details

Name:	us-gaap_DebtInstrumentLineItems
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtWeightedAverageInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount at risk under repurchase agreements is defined as the excess of carrying amount (or market value, if higher than the carrying amount or if there is no carrying amount) of the securities or other assets sold under agreement to repurchase, including accrued interest plus any cash or other assets on deposit to secure the repurchase obligation, over the amount of the repurchase liability (adjusted for accrued interest).

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph m

-Subparagraph 1

-Article 4

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(m)(1)(i)(B)(iii))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Definition

The carrying amount (fair value) as of the balance sheet date of securities held that had been pledged by counterparties under financing and lending arrangements, pursuant to which the entity has the right by agreement or custom to sell or re-pledge such securities.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5086-111524

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.17)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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RSO BORROWINGS (CMBS – Term Repurchase Facility) (Details) (CMBS - Term Repurchase Facilities [Member], USD $)	0 Months Ended	3 Months Ended	12 Months Ended
	Feb. 01, 2013	Mar. 31, 2013	Dec. 31, 2012
Wells Fargo Bank, National Association [Member] \| RCC Real Estate And RCC Commercial [Member]
Debt Instrument [Line Items]
Face amount of debt issued		$ 44,100,000
Debt instrument term		2 years
Debt instrument term, option to extend	1 year	1 year
Description of variable rate basis		one-month LIBOR
Basis spread on variable rate (in hundredths)		1.29%
Line of credit facility, extension fee percentage (in hundredths)		0.25%
Derivative, required securities average life (exceeds)		2 years
Weighted average basis spread on variable rate		1.30%
Unamortized debt issuance costs		117,000
Debt instrument, fair value		52,300,000
Weighted-average interest rate		1.48%	1.53%
Amount at Risk Under Facility [Abstract]
Amount at Risk		10,345,000	10,722,000
Weighted Average Maturity in Days		18 days	18 days
Weighted Average Interest Rate		1.48%	1.53%
Wells Fargo Bank, National Association [Member] \| RCC Real Estate [Member]
Debt Instrument [Line Items]
Face amount of debt issued			42,500,000
Basis spread on variable rate (in hundredths)			1.30%
Unamortized debt issuance costs			23,000
Debt instrument, fair value			51,400,000
Weighted-average interest rate			1.53%
Amount at Risk Under Facility [Abstract]
Weighted Average Interest Rate			1.53%
Wells Fargo Bank, National Association [Member] \| Maximum [Member] \| RCC Real Estate And RCC Commercial [Member]
Debt Instrument [Line Items]
Face amount of debt issued		100,000,000.0
Linked Transactions [Member] \| RCC Real Estate [Member]
Debt Instrument [Line Items]
CMBS Linked repurchase agreement		15,700,000	20,400,000
Linked Transactions [Member] \| Wells Fargo Bank, National Association [Member] \| RCC Real Estate [Member]
Debt Instrument [Line Items]
Description of variable rate basis			one-month LIBOR
Basis spread on variable rate (in hundredths)			1.42%
Weighted-average interest rate			1.60%
CMBS Linked repurchase agreement		13,300,000	12,200,000
Repurchase agreement, fair value of collateral securities			$ 14,600,000
Amount at Risk Under Facility [Abstract]
Weighted Average Interest Rate			1.60%