Commitments and Contingencies - Additional Information (Detail) - USD ($)	1 Months Ended	3 Months Ended	6 Months Ended
Jul. 31, 2016	Jun. 30, 2016	Jun. 30, 2016
Property, Plant and Equipment [Line Items]
Future funding commitments		$ 2,235,000	$ 2,235,000
Additional capital calls funded		125,000,000	$ 125,000,000
701 Seventh WRT Investor LLC [Member]
Property, Plant and Equipment [Line Items]
Additional capital contributions		2,079,000
Subsequent Event [Member] \| 701 Seventh WRT Investor LLC [Member]
Property, Plant and Equipment [Line Items]
Additional capital contributions	$ 2,201,000
FLORIDA
Property, Plant and Equipment [Line Items]
Expiration date			Dec. 31, 2017
Ground lease, rent expense			$ 2.00
New York, NY [Member] \| Ground Lease [Member]
Property, Plant and Equipment [Line Items]
Ground lease commitments, 2016		806,000	806,000
Ground lease commitments, 2017		1,656,000	1,656,000
Ground lease commitments, 2018		1,791,000	1,791,000
Ground lease commitments, 2019		1,844,000	1,844,000
Ground lease commitments, 2020		1,900,000	1,900,000
Ground lease commitments, Thereafter		103,884,000	$ 103,884,000
Expiration date			Jun. 01, 2053
Chicago, IL [Member] \| Ground Lease [Member]
Property, Plant and Equipment [Line Items]
Ground lease commitments, 2016		440,000	$ 440,000
Ground lease commitments, 2017		440,000	440,000
Ground lease commitments, 2018		440,000	440,000
Ground lease commitments, 2019		440,000	440,000
Ground lease commitments, 2020		440,000	440,000
Ground lease commitments, Thereafter		$ 6,047,000	$ 6,047,000
Expiration date			Sep. 30, 2034

Additional capital calls funded.

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- Definition

Additional capital contributed by parent.

+ References

No definition available.

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- Definition

Future funding commitments.

+ References

No definition available.

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- Definition

Date which lease or group of leases is set to expire, in CCYY-MM-DD format.

+ References

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- Definition

Future rental payments receivable within the fifth year from the balance sheet date under an operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6454179&loc=d3e41551-112718

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- Definition

Future rental payments receivable within the fourth year from the balance sheet date under an operating lease.

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- Definition

Future rental payments receivable within the third year from the balance sheet date under an operating lease.

+ References

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Future rental payments receivable within the second year from the balance sheet date under an operating lease.

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Amount of required minimum rental payments receivable in the remainder of the fiscal year following the latest fiscal year ended for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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- Definition

Future minimum lease payments receivable under operating leases for periods greater than five years following the balance sheet date.

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- Definition

Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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