Real Estate Investments and Related Intangibles - Property Dispositions and Real Estate Assets Held for Sale (Details)	3 Months Ended
Mar. 31, 2021 USD ($) property	Mar. 31, 2020 USD ($) property
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds after debt assumptions and closing costs	$ 253,503,000	$ 140,428,000
Gain on disposition of real estate and real estate assets held for sale, net	$ 76,074,000	25,249,000
Number of properties classified held for sale \| property	4
Carrying value of properties classified as held for sale	$ 4,900,000
Gain (loss) related to held for sale	$ (100,000)	$ 0
Consolidated Property Dispositions, 2021 [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of real estate properties disposed \| property	30
Aggregate proceeds	$ 261,000,000.0
Proceeds after debt assumptions and closing costs	253,500,000
Gain on disposition of real estate and real estate assets held for sale, net	76,100,000
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		2
Consolidated Property Dispositions, 2020 [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of real estate properties disposed \| property		30
Aggregate proceeds		$ 152,200,000
Proceeds after debt assumptions and closing costs		140,400,000
Gain on disposition of real estate and real estate assets held for sale, net		$ 25,200,000
Number of consolidated properties sold \| property		2
Company's share of proceeds		$ 150,500,000
Land [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Carrying value of properties classified as held for sale	1,800,000
Building Fixtures and Improvements [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Carrying value of properties classified as held for sale	$ 3,000,000.0

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

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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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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 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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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 Real Estate Properties Disposed

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