Real Estate (Summary of Real Estate Subject to Operating Leases) (Details) - USD ($)	Sep. 30, 2022	Dec. 31, 2021
Property Subject to or Available for Operating Lease [Line Items]
Land and improvements	$ 2,616,920,000	$ 2,527,483,000
Buildings and improvements	6,779,242,000	6,375,583,000
Leasehold interests	355,000	355,000
Real estate subject to operating leases, gross	9,396,517,000	8,903,421,000
Less accumulated depreciation and amortization	(1,610,018,000)	(1,470,062,000)
Real estate subject to operating leases, net, before work in progress	7,786,499,000	7,433,359,000
Work in progress for buildings and improvements	32,183,000	7,277,000
Accounted for using the operating method	7,818,682,000	7,440,636,000
Accounted for using the direct financing method	3,429,000	3,653,000
Real estate held for sale	4,181,000	5,557,000
Real estate portfolio	7,826,292,000	7,449,846,000
Asset under construction
Property Subject to or Available for Operating Lease [Line Items]
Land and improvements	$ 21,543,000	$ 8,979,000