Investment in Real Estate Investment in Real Estate - Summary of Purchase Price Allocation (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2018	Dec. 31, 2017
Real Estate [Line Items]
Land	$ 879,051	$ 864,813
Buildings and Improvements	2,507,087	$ 2,521,457
Acquisition Activity
Real Estate [Line Items]
Land	24,146
Buildings and Improvements	34,474
Other Assets	526
Purchase price of industrial properties acquired	60,965
Assumed Mortgage Loan (Note 4)	(11,654)
Purchase Price, Net	49,311
Acquisition Activity \| In-Place Leases
Real Estate [Line Items]
Acquired finite lived intangible assets, fair value	(2,483)
Acquisition Activity \| Above Market Leases
Real Estate [Line Items]
Acquired finite lived intangible assets, fair value	(73)
Acquisition Activity \| Below Market Leases
Real Estate [Line Items]
Acquired finite lived intangible liabilities, fair value	$ (737)

Finite-lived Intangible Liabilities Acquired

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The amount of assets acquired.

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Purchase Price, Net

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Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

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Aggregate of the carrying amounts as of the balance sheet date of investments in building and building improvements.

+ References

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-Publisher FASB
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Amount before accumulated depletion of real estate held for productive use, excluding land held for sale.

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Amount of assets classified as other.

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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.

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