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Real Estate and Intangibles Assets - Carrying Value of Lease Intangibles and Accumulated Amortization for Each Intangible Asset or Liability Class (Detail) - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Finite-Lived Intangible Assets [Line Items] |  |
Lease intangibles, net | $ 5,796 | $ 2,000
Lease intangibles, at cost |  |
Finite-Lived Intangible Assets [Line Items] |  |
Lease intangibles, at cost | 6,971 | 3,273
Accumulated amortization | (1,175) | (1,273)
Lease intangibles, net | 5,796 | 2,000
Leasehold interest – land |  |
Finite-Lived Intangible Assets [Line Items] |  |
Lease intangibles, at cost | 3,498 | 0
In-place leases |  |
Finite-Lived Intangible Assets [Line Items] |  |
Lease intangibles, at cost | 1,523 | 1,481
Leasing costs |  |
Finite-Lived Intangible Assets [Line Items] |  |
Lease intangibles, at cost | 1,511 | 1,086
Tenant relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Lease intangibles, at cost | 439 | 706
Below-Market Leases |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets (liability) gross | (777) | (766)
Finite-lived intangible asset, accumulated (amortization) accretion | 87 | 47
Above-market lease values and lease incentives |  |
Finite-Lived Intangible Assets [Line Items] |  |
Lease intangibles, at cost | 46 | 19
Accumulated amortization | (21) | (14)
Below-market lease values and deferred revenue |  |
Finite-Lived Intangible Assets [Line Items] |  |
Below-market lease values, gross | (823) | (785)
Below-market lease values, accumulated (amortization) accretion | $ 108 | $ 61

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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