Debt - Mortgage Loans Payable (Detail) (USD $)	3 Months Ended
Mar. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Mortgage loans payable	$ 296,174,000us-gaap_SecuredDebt	$ 296,954,000us-gaap_SecuredDebt
Lisle, IL [Member] \| Two Point Six Eight Percent Loan Due October Two Thousand And Fifteen [Member]
Debt Instrument [Line Items]
Maturity	Oct 2015
Loan bears interest, description of variable rate basis	Libor + 2.5 %
Interest Rate	2.68%
Mortgage loans payable	5,582,000	5,713,000
Lisle, IL [Member] \| 5.55% Loan Due in Mar 2017 [Member]
Debt Instrument [Line Items]
Maturity	Mar 2017
Loan bears interest, description of variable rate basis	-
Interest Rate	5.55%
Mortgage loans payable	5,371,000	5,392,000
Chicago, IL [Member] \| 5.75% Loan Due in Mar 2016 [Member]
Debt Instrument [Line Items]
Maturity	Mar 2016
Loan bears interest, description of variable rate basis	-
Interest Rate	5.75%
Mortgage loans payable	19,393,000	19,491,000
New York, NY [Member] \| 3.50% Loan Due in May 2016 [Member]
Debt Instrument [Line Items]
Maturity	May 2016
Loan bears interest, description of variable rate basis	Libor + 2.5 %
Interest Rate	3.50%
Mortgage loans payable	50,750,000	51,034,000
Greensboro, North Carolina Sale [Member] \| 6.22% Loan Due in Aug 2016 [Member]
Debt Instrument [Line Items]
Maturity	Aug 2016
Loan bears interest, description of variable rate basis	-
Interest Rate	6.22%
Mortgage loans payable	13,600,000	13,600,000
Phoenix Az [Member] \| 2.69% Loan Due in Oct 2016 [Member]
Debt Instrument [Line Items]
Maturity	Oct 2016
Loan bears interest, description of variable rate basis	Libor + 2.0 %
Interest Rate	2.69%
Mortgage loans payable	22,462,000	22,462,000
Stamford, CT [Member] \| 2.69% Loan Due in Oct 2016 [Member]
Debt Instrument [Line Items]
Maturity	Oct 2016
Loan bears interest, description of variable rate basis	Libor + 2.0 %
Interest Rate	2.69%
Mortgage loans payable	44,923,000	44,923,000
Houston, TX [Member] \| 2.69% Loan Due in Oct 2016 [Member]
Debt Instrument [Line Items]
Maturity	Oct 2016
Loan bears interest, description of variable rate basis	Libor + 2.0 %
Interest Rate	2.69%
Mortgage loans payable	59,524,000	59,524,000
Cerritos, CA [Member] \| 5.07% Loan Due in Jan 2017 [Member]
Debt Instrument [Line Items]
Maturity	Jan 2017
Loan bears interest, description of variable rate basis	-
Interest Rate	5.07%
Mortgage loans payable	23,000,000	23,000,000
Orlando, FL [Member] \| 6.40% Loan Due in Jul 2017 [Member]
Debt Instrument [Line Items]
Maturity	Jul 2017
Loan bears interest, description of variable rate basis	-
Interest Rate	6.40%
Mortgage loans payable	36,173,000	36,347,000
Plantation, FL [Member] \| 6.48% Loan Due in Apr 2018 [Member]
Debt Instrument [Line Items]
Maturity	Apr 2018
Loan bears interest, description of variable rate basis	-
Interest Rate	6.48%
Mortgage loans payable	10,513,000	10,550,000
Churchill [Member] \| 3.50% Loan Due in Aug 2024 [Member]
Debt Instrument [Line Items]
Maturity	Aug 2024
Loan bears interest, description of variable rate basis	-
Interest Rate	3.50%
Mortgage loans payable	$ 4,883,000	$ 4,918,000

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.

No definition available.

+ Details

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

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

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

+ Details

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

- Details

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

- Definition

Description of the maturity date of the debt instrument including whether the debt matures serially and, if so, a brief description of the serial maturities.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(2))

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

+ Details

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

- Definition

Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

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

+ Details

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

- Details

Name:	us-gaap_StatementGeographicalAxis=fur_CerritosCAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementGeographicalAxis=fur_ChicagoIlMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementGeographicalAxis=fur_ChurchillMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementGeographicalAxis=fur_GreensboroNcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementGeographicalAxis=fur_HoustonTxMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementGeographicalAxis=fur_LisleIlMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementGeographicalAxis=fur_OrlandoFlMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementGeographicalAxis=fur_PhoenixAzMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementGeographicalAxis=fur_PlantationFlMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementGeographicalAxis=fur_StamfordCtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementGeographicalAxis=stpr_NY
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: