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Real Estate and Lease Intangibles - Acquisitions and Dispositions - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) Building	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Net gain on sales of real estate properties	$ 256,810	$ 157,057	$ 4,044,055
Net gain on sales of land parcels	987	19,167	15,731
Non-cash asset impairment charge	$ 702	1,693	$ 0
Non-cash asset impairment charge		1,700
Real estate held-for-sale, value		$ 200
San Francisco
Number of buildings damaged due to fire | Building	1

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- Definition

The difference between the book value and the sale price of land parcels sold within the period.

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Number of buildings damaged due to fire.

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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The net gain (loss) resulting from sales and other disposals of real estate owned for investment purposes.

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The charge against earnings in the period to reduce the carrying amount of real property to fair value.

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Carrying amount as of the balance sheet date of investments in land and buildings held for sale, excluding real estate considered to be inventory of the entity.

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