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Lease Intangibles - Additional Information (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items] |  |
Below market rents, acquired | $ 7.9 | $ 10.9
Below market rents acquired, weighted average useful life | 20 years 6 months | 12 years 1 month 6 days
Above-market ground lease, acquired |  | $ 0.7
Above-market ground lease acquired, weighted average useful life |  | 11 years 6 months
In-place lease intangible assets |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets acquired | $ 24.2 | $ 41.6
Acquired intangible assets, weighted average useful life | 4 years 3 months 18 days | 4 years 1 month 6 days
Above-market rent |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets acquired | $ 2.5 | $ 2.7
Acquired intangible assets, weighted average useful life | 1 year 8 months 12 days | 4 years 9 months 18 days

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- Definition Above-market ground lease, acquired. + References No definition available. + Details
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- Definition Above-market ground lease acquired, weighted average useful life. + References No definition available. + Details
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- Definition Below market lease acquired weighted average useful life. + References No definition available. + Details
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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition Amount of acquired leases acquired as part of a real property acquisition at below market lease rate with a finite life. + References No definition available. + Details
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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. + Details
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- Definition Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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