Summary of Significant Accounting Policies (Details) $ in Thousands	Mar. 31, 2020 USD ($) property	Jan. 31, 2020 property	Jan. 01, 2020 USD ($)	Dec. 31, 2019 USD ($)		Oct. 31, 2019 property	Jan. 01, 2019 USD ($)		Dec. 31, 2018 USD ($)	[2]
Schedule of Equity Method Investments [Line Items]
Cumulative effect of new accounting principle				$ (1,524)	[1]				$ 590
Present value of lease liabilities	$ 156,808			156,611
Right-of-use asset	171,843			172,486
Unamortized lease intangibles	(550,348)			(331,693)
Loans receivable, reserve	$ 9,314			0
ASU 2016-02
Schedule of Equity Method Investments [Line Items]
Present value of lease liabilities							$ 153,000
Right-of-use asset							166,000
Accrued straight-line rent liability							20,000
Unamortized lease intangibles							33,000
ASU 2016-13
Schedule of Equity Method Investments [Line Items]
Cumulative effect of new accounting principle			$ 2,000
Cumulative Dividends In Excess Of Earnings
Schedule of Equity Method Investments [Line Items]
Cumulative effect of new accounting principle				$ (1,524)	[1]		$ 1,000	[1]	$ 590
CCRC JV | Brookedale MTCA
Schedule of Equity Method Investments [Line Items]
Property count | property		15
Other non-reportable segments | Assets Leased to Others | CCRC JV
Schedule of Equity Method Investments [Line Items]
Property count | property		15				15
Other non-reportable segments | Assets Leased to Others | CCRC JV | Brookedale MTCA
Schedule of Equity Method Investments [Line Items]
Property count | property		13
SHOP
Schedule of Equity Method Investments [Line Items]
Number of deconsolidating assets | property	19

[1] On January 1, 2020, the Company adopted a series of Accounting Standards Updates (“ASUs”) related to accounting for credit losses and recognized the cumulative-effect of adoption to beginning retained earnings. Refer to Note 2 for a detailed impact of adoption.

[2] On January 1, 2019, the Company adopted a series of ASUs related to accounting for leases and recognized the cumulative-effect of adoption to beginning retained earnings. Refer to Note 2 for a detailed impact of adoption.