Land, Buildings and Improvements and Assets Held for Sale - Assets Subject To Operating Leases (Details) - Operating real estate - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Real Estate Investment Property At Cost
Less: Accumulated depreciation	$ (1,497,655)	$ (1,448,020)
Net property subject to operating lease	10,450,573	10,343,714
Land
Real Estate Investment Property At Cost
Gross property subject to operating lease	2,168,530	2,151,327
Buildings and improvements
Real Estate Investment Property At Cost
Gross property subject to operating lease	9,664,500	9,525,858
Real estate under construction
Real Estate Investment Property At Cost
Gross property subject to operating lease	$ 115,198	$ 114,549

Amount of accumulated depreciation of lessor's underlying asset for which right to use has been conveyed to lessee under operating lease.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123405975&loc=d3e41551-112718

Reference 3: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=123422147&loc=d3e41460-112716

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 30
-Section 50
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=124258985&loc=SL77919398-209981

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant