Equity Method Investment Additional Ownership Percentage Acquired

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Gain (Loss) From Change Of Control

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Gain (Loss) From Change Of Control, Net Of Tax

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Number Of Adjacent Sites Currently Held

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Number Of Properties Acquired

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Area of land held.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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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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Cash outflow related to amounts given in advance to show or confirm an intention to complete an acquisition of land, buildings, other structures, or any item classified as real estate.

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The cash outflow from the acquisition of real estate intended to generate income for the owner; excludes land acquired for use by the owner.

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The cash outflow from the acquisition of a piece of land, anything permanently fixed to it, including buildings, structures on it and so forth; includes real estate intended to generate income for the owner; excludes real estate acquired for use by the owner.

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The cash outflow associated with the purchase of real estate held-for-investment and real estate joint ventures.

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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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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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Real Estate Transactions - 2020 Real Estate Investments (Details) $ in Thousands		1 Months Ended						3 Months Ended	12 Months Ended
	Nov. 03, 2020 USD ($)	Dec. 31, 2020 USD ($) property	Nov. 30, 2020 USD ($) property	Oct. 31, 2020 USD ($) a property	Jul. 31, 2020 USD ($) property	Apr. 30, 2020 USD ($)	Jun. 30, 2019 USD ($) property	Mar. 31, 2019 USD ($)	Dec. 31, 2020 USD ($) asset	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Real Estate [Line Items]
Proceeds from divestiture of interest in joint venture									$ 0	$ 89,868	$ 393,997
Loss (gain) upon change of control, net			$ 16,000						159,973	$ 168,023	$ 9,154
Long-term debt, gross		$ 6,346,370							$ 6,346,370
Land
Real Estate [Line Items]
Number of properties acquired \| property			1
Life Science JVs
Real Estate [Line Items]
Investment ownership percentage		49.00%							49.00%
Waldwick
Real Estate [Line Items]
Number of properties acquired \| property				1
Investment ownership percentage				100.00%
Additional ownership percentage acquired				15.00%
Payments to acquire real estate joint ventures				$ 4,000
Gain on consolidation				$ 6,000
MBK JV
Real Estate [Line Items]
Proceeds from divestiture of interest in joint venture			$ 11,000
Long-term debt, gross			$ 36,000
Massachusetts
Real Estate [Line Items]
Payments to acquire real estate		$ 54,000
Massachusetts \| Life Science JVs
Real Estate [Line Items]
Investment ownership percentage		49.00%							49.00%
San Francisco, California
Real Estate [Line Items]
Area of Land \| a				12
Payments to acquire land				$ 128,000
Number of adjacent sites currently held \| property				2
Payments for deposits on real estate acquisitions	$ 10,000
Life Science
Real Estate [Line Items]
Number of properties acquired \| asset									3
Life Science \| Land
Real Estate [Line Items]
Payments to acquire real estate								$ 27,000
Life Science \| Massachusetts
Real Estate [Line Items]
Payments to acquire real estate		$ 610,000				$ 320,000
Number of properties acquired \| property		3
Medical Office
Real Estate [Line Items]
Number of properties acquired					1				7
Medical Office \| ARIZONA
Real Estate [Line Items]
Payments to acquire real estate					$ 27,000
Medical Office \| Indiana, Missouri, Illinois
Real Estate [Line Items]
Payments to acquire real estate				$ 169,000
Number of properties acquired \| property				7
Medical Office \| Texas
Real Estate [Line Items]
Payments to acquire real estate		$ 34,000
Number of properties acquired \| property		1
Senior Housing
Real Estate [Line Items]
Number of properties acquired \| property							1
Investment ownership percentage							100.00%
Gain on consolidation							$ 12,000
Land parcel
Real Estate [Line Items]
Number of properties acquired \| property			1