Real Estate Portfolio - Schedule of Components of Direct Financing and Operating Leases (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Real Estate [Abstract]
Income from sales-type and direct financing leases, excluding contingent rent	$ 270,188	$ 206,001	$ 718,192	$ 603,300
Income from operating leases	3,638	10,913	25,464	32,740
Income from lease financing receivables	49,799	0	77,743	0
Total revenue, excluding contingent rent	323,625	216,914	821,399	636,040
Contingent rent	86	0	229	0
Total lease revenue	323,711	216,914	821,628	636,040
Non-cash adjustment	(18,942)	2,494	(11,879)	(2,295)
Total contractual lease revenue	$ 304,769	$ 219,408	$ 809,749	$ 633,745