Investments in Real Estate - Acquisitions Allocation (Details) $ in Thousands, € in Millions, £ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 31, 2022 GBP (£)	Dec. 31, 2022 EUR (€)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 GBP (£)	Dec. 31, 2021 EUR (€)	Dec. 31, 2022 GBP (£)
Acquisitions
Weighted average amortization period for acquired lease intangible assets	11 years 7 months 6 days	11 years 7 months 6 days	11 years 7 months 6 days	12 years 8 months 12 days	12 years 8 months 12 days	12 years 8 months 12 days
Right of use asset - operating leases, net	$ 603,097			$ 631,515
Weighted average amortization period for acquired lease intangible liabilities	14 years 2 months 12 days	14 years 2 months 12 days	14 years 2 months 12 days	15 years 10 months 24 days	15 years 10 months 24 days	15 years 10 months 24 days
Allocated to other liabilities, lease liabilities under operating leases | £		£ 2.4
Real Estate Investment
Acquisitions
Land	$ 1,568,600	640.5	€ 118.0	$ 1,054,400	£ 438.9	€ 106.2
Buildings and improvements	3,853,600	663.0	156.8	1,802,600	888.0	173.4
Lease intangible assets	458,600	247.8	51.1	547,800	248.9	34.9
Other assets	634,100	203.0	5.4	530,200	40.4	21.9
Lease intangible liabilities	(94,900)	(60.1)	0.0	(91,600)	(7.1)	0.0
Other liabilities	(46,000)	(4.9)	0.0	(127,600)	(0.3)	(16.0)
Net	6,374,000	1,689.3	€ 331.3	3,715,800	1,608.9	€ 320.4
Allocated to land, right of use assets under long-term ground leases | £		42.5			8.2
Allocated to other assets, financing receivables with above-market terms	585,700	12.2		179,700	7.2
Allocated to other assets, finance lease right-of-use assets	32,800	188.4		85,000	£ 33.2
Allocated to other assets, right-of-use assets under ground leases	15,600
Right of use asset - operating leases, net | £							£ 2.4
Allocated to other assets, investments in sales-type leases				5,800
Allocated to other assets, right-of-use assets under ground leases accounted for as operating leases				259,700
Deferred rent on below market leases	28,000	£ 2.5		26,900
Allocated to other liabilities, lease liabilities under operating leases	11,500
Lease liabilities under finance leases	8,600			33,300
Allocated to other liabilities, lease liabilities under ground leases accounted for as operating leases				$ 67,400
Single Gaming Property | Real Estate Investment
Acquisitions
Land	419,500
Buildings and improvements	1,280,000
Net	1,700,000
Allocated in acquisition, operating lease, right-of-use asset	13,200
Allocated in acquisition, operating lease, liabilities	$ 9,300