Participating interest income.

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Percentage of Lease Revenue in Total Revenue

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Prepaymentfee

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Share-based payment arrangement, noncash expense included in severance

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Straight line rent write off

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount of direct write-downs of accounts receivable charged against the allowance.

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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The carrying amount of deferred costs.

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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No definition available.

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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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This element represents the rental revenue earned during the period from lessee-operators based on revenues generated in their operations, generally in excess of a base amount. Such rental revenue is generally stipulated in the lease agreement, usually will provide for a fixed percentage of revenue to be paid as additional (or possibly only) rent due the lessor, and may be based on gross revenues, net revenues, or multiple variations thereof. Percentage rent is often required under leases with retail outlets located on premises owned by hoteliers, cruise lines, others in the hospitality industry, and shopping mall operators, among others.

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Return of or reimbursements received in relation to direct costs and expenses previously paid or incurred.

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Amount of noncash expense for share-based payment arrangement.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of noncash expense for option under share-based payment arrangement.

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

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Summary of Significant Accounting Policies (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) segment	Sep. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)
Operating Segments
Number of Reportable Operating Segments \| segment			4
Revenue Recognition [Abstract]
Straight Line Rent			$ 10,000	$ 7,000
Straight line rent write off			1,400	0
Percentage rents			8,500	5,700
Mortgage And Other Participating Interest Income			600	0
Concentrations of Risk [Abstract]
Rental revenue	$ 161,262	$ 140,905	469,315	410,848
Share-based Payment Arrangement, Noncash Expense [Abstract]
Share based compensation			$ 9,832	11,295
Range of settlement date for shares for non-employee trustee from grant date, minimum (in years)			1 year
Deferred Costs	38,400		$ 38,400		$ 33,900
Accounts Receivable, Allowance for Credit Loss, Writeoff			300
Prepaymentfee			2,700	67,300
Recovery of Direct Costs			11,400	11,400
Share-based payment arrangement, noncash expense included in severance			$ 521	0
American Multi-Cinema, Inc. [Member]
Concentrations of Risk [Abstract]
Percent of megaplex theatre rental leased by AMC			30.00%
Rental revenue			$ 92,400	$ 86,300
Percentage of lease revenue in total revenue			17.60%	16.20%
TopGolf [Member]
Concentrations of Risk [Abstract]
Percent of megaplex theatre rental leased by AMC			43.00%
Rental revenue			$ 57,600	$ 46,400
Percentage of lease revenue in total revenue			11.00%	8.70%
Regal [Member]
Concentrations of Risk [Abstract]
Percent of megaplex theatre rental leased by AMC			31.00%
Rental revenue			$ 53,800	$ 42,600
Percentage of lease revenue in total revenue			10.20%	8.00%
Share Options [Member]
Share-based Payment Arrangement, Noncash Expense [Abstract]
Share based compensation, future vesting period minimum (in years)			4 years
Stock-option expense			$ 7	$ 213
Restricted Stock [Member]
Share-based Payment Arrangement, Noncash Expense [Abstract]
Share based compensation expense related to employees and trustees			$ 8,500	10,200
Restricted Stock [Member] \| Minimum [Member]
Share-based Payment Arrangement, Noncash Expense [Abstract]
Share based compensation, future vesting period minimum (in years)			3 years
Restricted Stock [Member] \| Maximum [Member]
Share-based Payment Arrangement, Noncash Expense [Abstract]
Share based compensation, future vesting period minimum (in years)			4 years
Restricted Share Units [Member] \| Non-Employee Trustees [Member]
Share-based Payment Arrangement, Noncash Expense [Abstract]
Share based compensation expense related to employees and trustees			$ 1,400	$ 931
Revolving Credit Facility [Member]
Share-based Payment Arrangement, Noncash Expense [Abstract]
Deferred Costs	$ 3,900		3,900		$ 5,000
triple-net lessor costs [Member]
Share-based Payment Arrangement, Noncash Expense [Abstract]
Recovery of Direct Costs			$ 5,800