Amount of contingent rental income.

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The amount of deferred rent receivable written off.

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Number of operating seniors.

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Period following the option window for ending date.

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Reimbursement of tax based on the assessed value of real estate by the local government. The tax is usually based on the value of property (including the land).

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Amount of amortization of lease incentive costs incurred by the lessor for the benefit of the lessee.

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The number of real estate properties owned as of the balance sheet date.

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Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable.

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Amount of operating lease income from lease payments paid and payable to lessor. Excludes variable lease payments not included in measurement of lease receivable.

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Amount of operating lease income from variable lease payments paid and payable to lessor, excluding amount included in measurement of lease receivable.

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Amount of contingent rental revenue recognized for the period under lease, based on the occurrences of an event or condition.

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The total amount of revenue recognized for the period from operating leases, including minimum lease revenue, contingent revenue, percentage revenue and sublease revenue.

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The total amount of lease revenue recognized for the period for which the lessee was obligated under leasing arrangements regardless of any other events or conditions. This amount excludes contingent revenue and sublease revenue.

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Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

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Amount of real estate investment property, net of accumulated depreciation, which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments.

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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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Difference between actual rental income due and rental income recognized on a straight-line basis.

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Real Estate Investments - Lease (Details)	3 Months Ended	12 Months Ended
Real Estate Investments - Lease (Details)	Mar. 31, 2019 USD ($) item	Dec. 31, 2019 USD ($) property	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Real estate investments
Carrying value		$ 1,136,816,000	$ 1,106,581,000
Income and Expenses, Lessor [Abstract]
Base cash rental income		134,117,000
Base cash rental income previous			127,477,000	$ 128,715,000
Variable cash rental income		16,462,000
Variable cash rental income previous		464,000	470,000	457,000
Straight-Line Rent		4,487,000	9,550,000	10,694,000
Adjustment for collectability		(1,926,000)
Amortization of Lease Incentives		(385,000)	(2,092,000)	(2,209,000)
Total Rental Income		152,755,000
Total Rental Income previous			$ 135,405,000	$ 137,657,000
Reimbursement Of Real Estate Tax Expense		15,998,000
Contingent rental income		464,000
Number of operating seniors \| item	2
Rent receivable written off	$ 1,926,000
Purchase Option in Lease Arrangements
Real estate investments
Gross Investment		149,093,000
Carrying value		$ 128,343,000
ALF \| Purchase Option in Lease Arrangements \| California
Real estate investments
Number of properties \| property		2
Gross Investment		$ 28,926,000
Carrying value		$ 16,056,000
ALF \| Purchase Option in Lease Arrangements \| California \| Minimum
Real estate investments
Purchase option ending period		24 months
ALF \| Purchase Option in Lease Arrangements \| California \| Maximum
Real estate investments
Purchase option ending period		48 months
MC \| Purchase Option in Lease Arrangements \| Florida
Real estate investments
Number of properties \| property		1
Gross Investment		$ 14,201,000
Carrying value		$ 12,757,000
MC \| Purchase Option in Lease Arrangements \| Ohio and Kentucky
Real estate investments
Number of properties \| property		2
Gross Investment		$ 30,126,000
Carrying value		$ 27,859,000
MC \| Purchase Option in Lease Arrangements \| Texas
Real estate investments
Number of properties \| property		2
Gross Investment		$ 25,265,000
Carrying value		$ 24,335,000
ALF and MC \| Purchase Option in Lease Arrangements \| California
Real estate investments
Number of properties \| property		2
Gross Investment		$ 38,895,000
Carrying value		$ 36,542,000
ALF and MC \| Purchase Option in Lease Arrangements \| South Carolina
Real estate investments
Number of properties \| property		1
Gross Investment		$ 11,680,000
Carrying value		$ 10,794,000