Quarterly report pursuant to Section 13 or 15(d)

Real Estate and Intangible Assets - Summary of Lease on Property (Detail)

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Real Estate and Intangible Assets - Summary of Lease on Property (Detail)
$ in Thousands
9 Months Ended
Sep. 30, 2018
USD ($)
ft²
Sep. 30, 2017
USD ($)
ft²
Real Estate Properties [Line Items]    
Aggregate Square Footage | ft² 184,441 577,471
Aggregate Annualized GAAP Rent $ 391 $ 4,062
Aggregate Tenant Improvement 0 1,181
Aggregate Leasing Commissions $ 14 $ 475
Weighted average    
Real Estate Properties [Line Items]    
Lease Term 1 year 7 months 23 days 8 years 10 months 24 days