Loans Receivable - Activity Related to Loans Receivable (Detail) (USD $) In Thousands, unless otherwise specified	5 Months Ended	7 Months Ended	12 Months Ended
Dec. 31, 2014	Jul. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Receivables [Abstract]
Balance at beginning of year		$ 101,100	$ 101,100	$ 211,250
Purchase and advances			35,992fur_LoansReceivablePurchasesAndAdvances	22,314fur_LoansReceivablePurchasesAndAdvances
Interest received, net			(283)	(514)
Repayments / sale proceeds / forgiveness			(120,194)	(75,407)	(68,824)
Elimination of 1515 Market Street in consolidation				(60,279)
Loan discount accretion		2,086	2,086	4,121	8,333
Discount accretion received in cash		(5,865)us-gaap_AccretionOfDiscount	(5,865)us-gaap_AccretionOfDiscount	(37)us-gaap_AccretionOfDiscount	(15,720)us-gaap_AccretionOfDiscount
Provision for loss on loans receivable		0us-gaap_ProvisionForLoanLossesExpensed		(348)us-gaap_ProvisionForLoanLossesExpensed
Liquidation adjustment			6,071
Change in liquidation value	5,098fur_IncreaseDecreaseInLoansReceivable		5,098fur_IncreaseDecreaseInLoansReceivable
Balance at end of year	$ 24,005		$ 24,005	$ 101,100	$ 211,250

Increase decrease in loans receivable.

No definition available.

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Definition

Liquidation adjustment related to loan receivable activity.

+ References

No definition available.

+ Details

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Namespace Prefix:	fur_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Loans receivable amount of interest received accrued.

+ References

No definition available.

+ Details

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Namespace Prefix:	fur_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Loans receivable purchases and advances.

+ References

No definition available.

+ Details

Name:	fur_LoansReceivablePurchasesAndAdvances
Namespace Prefix:	fur_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Mortgage loans on real estate commercial and consumer elimination of Isis market.

+ References

No definition available.

+ Details

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- Definition

The sum of the periodic adjustments of the differences between securities' face values and purchase prices that are charged against earnings. This is called accretion if the security was purchased at a discount and amortization if it was purchased at premium. As a noncash item, this element is an adjustment to net income when calculating cash provided by or used in operations using the indirect method.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

+ Details

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

- Definition

Amount of increase (decrease) in standardized measure of discounted future net cash flow as a result of passage of time.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 932

-SubTopic 235

-Section 50

-Paragraph 35

-Subparagraph (h)

-URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e62500-109447

+ Details

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Balance Type:	debit
Period Type:	duration

- Definition

The balance represents the amount of loans that are secured by real estate mortgages, offset by the reserve to cover probable credit losses on the loan portfolio.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.1(c))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Subparagraph c

-Article 7

+ Details

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

- Definition

The net amount paid or received by the reporting entity associated with purchase (sale or collection) of loans receivable arising from the financing of goods and services.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3095-108585

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 9

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3098-108585

+ Details

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

- Definition

Amount of expense related to loss from loan transactions.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 11

-Article 9

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-04.11)

-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

+ Details

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Balance Type:	debit
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- Details

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