Leases Lessor (Details) $ in Thousands, ft² in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019 USD ($) ft²	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2019 USD ($) ft²	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Operating Lease
Land parcel subject to lease agreement that contains a purchase option	2								2
Rent Commence Date									Oct. 01, 2017
Lessee Option to Purchase Underlying Asset									30 years
Operating Leases, Future Minimum Payments Receivable [Abstract]
2020	$ 1,074,698								$ 1,074,698
2021	1,090,837								1,090,837
2022	1,076,898								1,076,898
2023	1,024,652								1,024,652
2024	948,223								948,223
2025	6,238,082								6,238,082
Total	11,453,390								$ 11,453,390
Direct Financing Lease
Remaining Lease Term									72 years 10 months 24 days
Lessee Option to Purchase Underlying Asset									30 years
Direct Financing Lease, Net Investment in Leases
Gross investment in direct financing lease	260,457				$ 262,111				$ 260,457	$ 262,111
Less: unearned income	(220,541)				(222,962)				(220,541)	(222,962)
Net investment in direct financing lease	39,916				39,149				39,916	39,149
Direct Financing Leases, Future Minimum Payments Receivable
2020	1,705								1,705
2021	1,756								1,756
2022	1,809								1,809
2023	1,863								1,863
2024	1,919								1,919
Thereafter	251,405								251,405
Income from rentals
Operating leases income									1,465,692
Direct financing lease income									2,421
Revenues subject to the new lease accounting standard									1,468,113
Revenues	408,114	$ 390,484	$ 373,856	$ 358,842	340,463	$ 341,823	$ 325,034	$ 320,139	1,531,296	1,327,459	$ 1,128,097
Deferred Costs, Leasing, Net
Deferred leasing costs	631,416				557,791				631,416	557,791
Accumulated amortization	(361,373)				(318,721)				(361,373)	(318,721)
Deferred leasing costs, net	$ 270,043				$ 239,070				$ 270,043	239,070
Minimum
Operating Lease
Lessee Option to Purchase Underlying Asset									15 years
Direct Financing Lease
Lessee Option to Purchase Underlying Asset									15 years
Maximum
Operating Lease
Lessee Option to Purchase Underlying Asset									74.5 years
Direct Financing Lease
Lessee Option to Purchase Underlying Asset									74.5 years
North America
Lessor, Lease, Description [Line Items]
Number of Real Estate Properties	291								291
Area of Real Estate Property | ft²	27.0								27.0
Land parcels subject to lease agreement that contains a purchase option
Operating Lease
Remaining Lease Term									72 years 10 months 24 days
Income from rentals
Income from rentals
Revenues									$ 1,516,864	$ 1,314,781	$ 1,122,325
Income from rentals | Accounting Standards Update 2014-09 - Revenue from Contract with Customers
Income from rentals
Revenues subject to the revenue recognition ASU									$ 48,751