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Equity Method Investment, Partner's Ownership Percentage

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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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Gain (Loss) From Change Of Control, Tax

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Represents number of assets sold or transited per definitive agreements.

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Number Of Properties Acquired

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- Definition

Payments To Acquire Outstanding Equity Interests

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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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Fair value portion of investments in an entity not consolidated. Includes, but is not limited to, investments in an entity that is affiliated with the reporting entity by means of direct or indirect ownership, an entity in which the reporting entity shares control of the entity with another party or group, an entity which the company has significant influence, but does not have control and subsidiaries that are not required to be consolidated and are accounted for using the equity or cost method.

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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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Real Estate Transactions - Real Estate Investments (Details) $ in Thousands	1 Months Ended							3 Months Ended		12 Months Ended
	Apr. 30, 2020 USD ($)	Jan. 31, 2020 USD ($)	Dec. 31, 2019 USD ($) property asset	Jul. 31, 2019 USD ($) property facility	Jun. 30, 2019 USD ($) property	May 31, 2019 USD ($) property	Apr. 30, 2019 USD ($) property	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($) property	Dec. 31, 2019 USD ($) property
Real Estate [Line Items]
Debt assumed								$ 6,422,257
Loss (gain) upon change of control, net								167,434	$ 0
Life science joint ventures
Real Estate [Line Items]
Payments to acquire real estate					$ 245,000
Number of properties acquired \| property					2
Life science \| Life science facility
Real Estate [Line Items]
Payments to acquire real estate									71,000
Life science \| Land
Real Estate [Line Items]
Payments to acquire real estate									$ 27,000
Senior Housing
Real Estate [Line Items]
Number of properties acquired \| property					1
Payments to acquire outstanding equity interests					$ 24,000
Investment ownership percentage					100.00%
Gain (loss) from change of control, net					$ 12,000
Gain on consolidation, tax					$ 1,000
Senior Housing \| Senior Housing
Real Estate [Line Items]
Payments to acquire real estate				$ 284,000		$ 113,000	$ 445,000
Number of properties acquired \| property				5		3	9
Assets Leased to Others
Real Estate [Line Items]
Number of assets transitioned \| property									37
Assets Leased to Others \| Senior housing triple-net
Real Estate [Line Items]
Number of assets transitioned \| property									17
Assets Leased to Others \| SHOP
Real Estate [Line Items]
Number of assets transitioned \| property									20
Mortgage Debt
Real Estate [Line Items]
Debt assumed				$ 112,000		$ 50,000		$ 472,257
Massachusetts \| Life science
Real Estate [Line Items]
Deposit, nonrefundable		$ 20,000
San Diego \| Life science
Real Estate [Line Items]
Number of properties acquired \| property										1
San Diego \| Life science \| Life science facility
Real Estate [Line Items]
Payments to acquire real estate										$ 16,000
Boston \| Life science \| Life science facility
Real Estate [Line Items]
Payments to acquire real estate				$ 228,000
Number of properties acquired \| facility				4
Kansas \| Medical office
Real Estate [Line Items]
Payments to acquire real estate										$ 15,000
Number of properties acquired \| property										1
Texas \| Medical office
Real Estate [Line Items]
Payments to acquire real estate										$ 9,000
Number of properties acquired \| property										1
Cambridge \| Life science \| Life science facility
Real Estate [Line Items]
Payments to acquire real estate			$ 333,000
Number of properties acquired \| asset			1
SHOP JV
Real Estate [Line Items]
Investment ownership percentage								54.00%
Purchase cost			$ 367,000							$ 367,000
Partnership investment ownership percentage			46.50%							46.50%
SHOP JV \| SHOP
Real Estate [Line Items]
Investment ownership percentage			53.50%							53.50%
Purchase cost			$ 790,000							$ 790,000
SHOP JV \| Assets Leased to Others \| SHOP
Real Estate [Line Items]
Number of assets transitioned \| property			19
SHOP JV
Real Estate [Line Items]
Loss (gain) upon change of control, net			$ 161,000
Subsequent Event \| Massachusetts \| Life science
Real Estate [Line Items]
Payments to acquire real estate	$ 320,000