Summary of Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2019 USD ($) segment properties	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Current Expected Credit Loss Amount, Minimum	$ 2,000,000.0
Deferred financing costs, net	$ 37,165,000	$ 33,941,000
Number of Reportable Operating Segments | segment	2
Accounting for Acquisitions [Abstract]
Transaction costs	$ 23,789,000	3,698,000	$ 523,000
Goodwill	693,000	693,000
Intangible Assets, Net (Including Goodwill)	44,692,000	42,491,000
Amortization of above/below market leases and tenant allowances, net	343,000	581,000	107,000
Below Market Lease, Net	8,934,000	8,100,000
Revenue Recognition [Abstract]
Straight Line Rent	13,600,000	10,200,000	4,300,000
Percentage rents	15,000,000.0	10,700,000	7,800,000
Participating interest income	600,000	0	700,000
prepayment fee	$ 2,700,000	74,700,000	800,000
Income Tax Disclosure [Abstract]
Percent of taxable income distributed to shareholders annually	90.00%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	35.00%
Current Federal Tax Expense (Benefit)	$ 0
Deferred TRS Income Tax Expense (Benefit)	$ (3,719,000)	$ (319,000)	$ (137,000)
Effective Income Tax Rate Reconciliation, Percent	1.50%	0.80%	0.90%
Other	$ 15,390,000	$ 10,760,000
Enacted Corporate tax rate, percent	21.00%
Deferred Tax Assets, Gross	$ 19,253,000	14,111,000
Deferred Tax Liabilities, Gross	3,863,000	3,351,000
Deferred Tax Liabilities	4,500,000
Current Income and Withholding Tax Expense	(1,100,000)	1,700,000	$ 1,600,000
Provision for income tax expense	0	0	0
Concentration Risks, Types, No Concentration Percentage [Abstract]
Rental revenue	593,022,000	509,086,000	441,187,000
Share-based Payment Arrangement, Noncash Expense [Abstract]
Share based compensation	13,180,000	15,111,000	14,142,000
Share-based compensation expense included in severance expense	580,000	3,218,000	0
Severance expense	$ 2,364,000	$ 5,938,000	$ 0
Impaired notes receivable	0	0	0
Current Expected Credit Loss Amount, Maximum	$ 2,500,000
Straight line rent write off	1,400,000	$ 0	$ 9,000,000.0
Recovery of Direct Costs	16,000,000.0	15,300,000	15,500,000
American Multi-Cinema, Inc. [Member]
Concentration Risks, Types, No Concentration Percentage [Abstract]
Rental revenue	$ 123,792,000	$ 115,805,000	$ 114,374,000
Percentage of lease revenue in total revenue	17.60%	16.50%	19.90%
TopGolf [Member]
Concentration Risks, Types, No Concentration Percentage [Abstract]
Rental revenue	$ 78,962,000	$ 64,459,000	$ 53,369,000
Percentage of lease revenue in total revenue	11.20%	9.20%	9.30%
Regal [Member]
Concentration Risks, Types, No Concentration Percentage [Abstract]
Rental revenue	$ 75,784,000	$ 57,614,000	$ 49,433,000
Percentage of lease revenue in total revenue	10.80%	8.20%	8.60%
Leases, Acquired-in-Place [Member]
Accounting for Acquisitions [Abstract]
Intangible assets, accumulated amortization	$ 10,800,000	$ 7,700,000
Weighted average useful life for in-place leases	11 years 10 months 24 days
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
2020	$ 3,348,000
2021	2,959,000
2022	2,334,000
2023	2,305,000
2024	2,247,000
Thereafter	11,335,000
Total	24,528,000	21,749,000
Lease Agreements [Member]
Accounting for Acquisitions [Abstract]
Amortization	3,700,000	2,900,000	$ 2,000,000.0
Above Market Leases [Member]
Accounting for Acquisitions [Abstract]
Intangible assets, accumulated amortization	$ 1,100,000	1,000,000
Weighted average useful life for in-place leases	6 years 10 months 24 days
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
2020	$ 20,000
2021	10,000
2022	6,000
2023	6,000
2024	6,000
Thereafter	23,000
Total	71,000	154,000
Trade Names [Member]
Accounting for Acquisitions [Abstract]
Intangible assets, accumulated amortization	184,000	53,000
Non-amortizing indefinite lived trade names	$ 5,400,000	5,400,000
Weighted average useful life for in-place leases	28 years 2 months 12 days
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
2020	$ 133,000
2021	133,000
2022	133,000
2023	133,000
2024	133,000
Thereafter	2,960,000
Total	3,625,000
Indefinite and Finite-lived Intangible Assets, net	8,980,000	9,110,000
Below market leases [Member]
Accounting for Acquisitions [Abstract]
Intangible assets, accumulated amortization	$ 1,100,000	700,000
Weighted average useful life for in-place leases	30 years 3 months 18 days
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
2020	$ 503,000
2021	473,000
2022	438,000
2023	415,000
2024	400,000
Thereafter	6,705,000
Total	8,934,000
Contract Value, intangible [Member]
Accounting for Acquisitions [Abstract]
Intangible assets, accumulated amortization	$ 500,000	183,000
Weighted average useful life for in-place leases	28 years 6 months
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
2020	$ 365,000
2021	365,000
2022	365,000
2023	365,000
2024	365,000
Thereafter	8,595,000
Total	10,420,000	10,785,000
CANADA
Income Tax Disclosure [Abstract]
Other	10,900,000
Segment, Continuing Operations [Member]
Accounting for Acquisitions [Abstract]
Amortization of above/below market leases and tenant allowances, net	400,000	600,000	100,000
Discontinued Operations, Disposed of by Sale [Member]
Revenue Recognition [Abstract]
Straight Line Rent	3,000,000.0	5,500,000	6,700,000
prepayment fee	1,800,000
Share-based Payment Arrangement, Noncash Expense [Abstract]
Straight line rent write off	$ 1,200,000
Minimum [Member] | Building [Member]
Rental Properties [Abstract]
Estimated useful live of buildings (in years)	30 years
Minimum [Member] | Furniture and Fixtures [Member]
Rental Properties [Abstract]
Estimated useful live of buildings (in years)	3 years
Minimum [Member] | Building Improvements [Member]
Rental Properties [Abstract]
Estimated useful live of buildings (in years)	10 years
Maximum [Member] | Building [Member]
Rental Properties [Abstract]
Estimated useful live of buildings (in years)	40 years
Maximum [Member] | Furniture and Fixtures [Member]
Rental Properties [Abstract]
Estimated useful live of buildings (in years)	25 years
Maximum [Member] | Building Improvements [Member]
Rental Properties [Abstract]
Estimated useful live of buildings (in years)	20 years
Stock Options [Member]
Share-based Payment Arrangement, Noncash Expense [Abstract]
Share based compensation, future vesting period minimum (in years)	4 years
Stock or Unit Option Plan Expense	$ 10,000	300,000	700,000
Restricted Stock [Member] | Employee [Member]
Share-based Payment Arrangement, Noncash Expense [Abstract]
Share based compensation expense related to employees and trustees	$ 11,300,000	13,500,000	12,200,000
Restricted Stock [Member] | Minimum [Member] | Employee [Member]
Share-based Payment Arrangement, Noncash Expense [Abstract]
Share based compensation, future vesting period minimum (in years)	3 years
Restricted Stock [Member] | Maximum [Member] | Employee [Member]
Share-based Payment Arrangement, Noncash Expense [Abstract]
Share based compensation, future vesting period minimum (in years)	4 years
Restricted Stock Units (RSUs) [Member] | Non-Employee Trustees [Member]
Share-based Payment Arrangement, Noncash Expense [Abstract]
Share based compensation expense related to employees and trustees	$ 1,900,000	1,300,000	$ 1,300,000
Employee Severance [Member] | Accelerated Vesting of Shares [Member] | Nonvested Shares [Member]
Share-based Payment Arrangement, Noncash Expense [Abstract]
Severance expense	$ 600,000
Employee Severance [Member] | Accelerated Vesting of Shares [Member] | Chief Investment Officer [Member] | Nonvested Shares [Member]
Share-based Payment Arrangement, Noncash Expense [Abstract]
Severance expense		3,200,000
Theatre Project China Member | CHINA
Income Tax Disclosure [Abstract]
Number of Real Estate Properties | properties	4
Payments Related to Tax Withholding for Repatriation of Foreign Earnings	$ 13,000	62,000
Revolving Credit Facility [Member]
Deferred financing costs, net	3,500,000	$ 5,000,000.0
triple-net lessor costs [Member]
Share-based Payment Arrangement, Noncash Expense [Abstract]
Recovery of Direct Costs	$ 6,900,000