Investment in Real Estate - Summary of Intangible Assets (Liabilities) Subject to Amortization in the Period of Acquisition (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014
In-Place Leases
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired finite lived intangible asset, fair value	$ 2,660
Acquired finite lived intangible asset, weighted average life	71 months
Tenant Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired finite lived intangible asset, fair value	1,620
Acquired finite lived intangible asset, weighted average life	130 months
Above Market Leases
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired finite lived intangible asset, fair value	219
Acquired finite lived intangible asset, weighted average life	83 months
Below Market Ground Lease
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired finite lived intangible asset, fair value	1,854
Acquired finite lived intangible asset, weighted average life	480 months
Below Market Leases
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired finite lived intangible asset, fair value	$ (790)
Acquired finite lived intangible asset, weighted average life	71 months