Revenue Recognition - Additional Information (Detail) - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2018	Dec. 31, 2017
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Contract asset, explanation of change	The portion of payments retained by the customer until the second contingent event is not considered a significant financing component because the right to payment is expected to become unconditional within one year or less. Contract assets are transferred to receivables when the right to payment becomes unconditional.
Accounts receivable, net	$ 74,253	$ 108,695
Revenue performance obligation payment description	There is no fixed consideration included in the transaction price for any of these revenues.
Retail Value Inc. [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Disposition fees equal to percentage of gross sale price	1.00%
Tenant [Member] \| Minimum [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Rental revenue recognition period	1 month
Tenant [Member] \| Maximum [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Rental revenue recognition period	30 years
Adoption of Topic 606 [Member]
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Revenue recognized percentage upon lease execution	50.00%
Revenue recognized percentage upon tenant rent commencement	50.00%
Accounts receivable, net	$ 1,600	$ 1,900

Disposition fees equal to percentage of sale price.

No definition available.

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- Definition

Percentage of lease commission recognized upon lease execution prior to adoption.

+ References

No definition available.

+ Details

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- Definition

Percentage of lease commission recognized upon tenant rent commencement prior to adoption.

+ References

No definition available.

+ Details

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- Definition

Rental revenue recognition period.

+ References

No definition available.

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- Definition

For an unclassified balance sheet, the amount due from customers or clients for goods or services that have been delivered or sold in the normal course of business, reduced to their estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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- Definition

Explanation of change in right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130551-203045

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- Definition

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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- Definition

Description of payment terms in contract with customer. Includes, but is not limited to, timing of payment, existence of financing component, variability of consideration and constraint on variable consideration.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130554-203045

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