Net Assets in Liquidation - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended
Jan. 15, 2015	Mar. 31, 2015
Significant Acquisitions and Disposals [Line Items]
Increase due to estimated net realizable value of investments		$ 2,466,000
Decrease in estimated receipts during liquidation		(2,792,000)
Loan securities		918,000us-gaap_SecuritiesLoaned
Liquidation distribution per share	$ 2.25fur_LiquidationDistributionPerShare	$ 16.39fur_LiquidationDistributionPerShare
Liquidation date, expected completion		Mar. 31, 2015
Investments in Real Estate [Member]
Significant Acquisitions and Disposals [Line Items]
Increase due to estimated net realizable value of investments		3,975,000
Equity Investments [Member]
Significant Acquisitions and Disposals [Line Items]
Increase due to estimated net realizable value of investments		$ 2,733,000

Increase decrease in estimated receipts and costs during liquidation.

No definition available.

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- Definition

Liquidation distribution per share.

+ References

No definition available.

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- Definition

Amount of gain (loss) from remeasurement of an asset to reflect the change in value under liquidation basis.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 30

-Section 35

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35686333&loc=SL35686336-199416

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- Definition

Date the liquidation is expected to be completed, in CCYY-MM-DD format.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (b)(3)

-URI http://asc.fasb.org/extlink&oid=35686370&loc=SL35686388-199418

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- Definition

Amount, after the effects of master netting arrangements, of securities loaned to entities in exchange for collateral. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 20

-Section 50

-Paragraph 3

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=34720828&loc=SL20225862-175312

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 20

-Section 55

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-URI http://asc.fasb.org/extlink&oid=36459792&loc=SL20226008-175313

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 30

-Section 50

-Paragraph 1A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=34720971&loc=SL6224234-111729

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-Topic 940

-SubTopic 405

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-URI http://asc.fasb.org/extlink&oid=35710563&loc=d3e44140-110984

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