The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee.

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The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

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This element represents the amount of gain (loss) on sale of properties during the reporting period net of the applicable income taxes realized.

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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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No definition available.

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The cash inflow associated with the amount received from the sale of a business segment or subsidiary or sale of an entity that is related to it but not strictly controlled during the period (for example, an unconsolidated subsidiary, affiliate, joint venture or equity method investment).

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The cash inflow from the sale of an investment interest in a joint venture that the reporting entity has not previously accounted for using consolidation or the equity method of accounting.

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The cash inflow from the sale of real estate held-for-investment and real estate joint ventures.

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The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets.

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Cash received from the sale of real estate that is held for investment, that is, it is part of an investing activity during the period.

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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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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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Debt Instrument Number of Properties Secured by Each Non Recourse Loan

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Number Of Real Estate Properties, Held for Sale

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Number of Consolidated Real Estate Properties Sold

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Number of Joint Ventures Formed

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Number of Real Estate Properties Disposed

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Number of Unconsolidated Joint Ventures Disposed of

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Real Estate Investments and Related Intangibles - Property Dispositions and Real Estate Assets Held for Sale Narrative (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($) property	Jun. 30, 2018 USD ($) property	Jun. 30, 2019 USD ($) property joint_venture	Jun. 30, 2018 USD ($) property	Dec. 31, 2018 property
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership percentage					90.00%
Debt instrument, number of properties conveyed to lender \| property		1		1
Proceeds after debt assumptions and closing costs			$ 739,873	$ 180,723
Gain on disposition of real estate and real estate assets held for sale, net	$ 221,755	$ 5,821	232,586	23,156
Proceeds from disposition of discontinued operations			$ 0	123,925
Number of properties classified held for sale \| property	6		6		5
Carrying value of properties classified as held for sale	$ 22,600		$ 22,600
Gain (loss) related to held for sale			$ 800	$ (1,100)
Consolidated Property Dispositions, 2019 [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of real estate properties disposed \| property			75
Number of consolidated properties sold \| property			6
Number of joint ventures formed \| joint_venture			2
Aggregate proceeds			$ 809,200
Company's share of proceeds			796,400
Proceeds after debt assumptions and closing costs			739,900
Gain on disposition of real estate and real estate assets held for sale, net			$ 233,400
Consolidated Property Dispositions, 2018 [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of real estate properties disposed \| property				77
Aggregate proceeds				$ 181,600
Company's share of proceeds				175,500
Proceeds after debt assumptions and closing costs				175,100
Gain on disposition of real estate and real estate assets held for sale, net				$ 24,200
Red Lobster [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of real estate properties disposed \| property			23	11
Unconsolidated Property Dispositions, 2018 [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Company's share of proceeds				$ 17,100
Number of disposed properties owned by unconsolidated joint ventures \| property				1
Proceeds from disposition of discontinued operations				$ 34,100
Proceeds from after debt repayments and closing costs				5,600
Debt repayments				20,400
Net gain (loss) on sale of properties				$ 700
Industrial Partnership [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership percentage	20.00%		20.00%