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Real Estate (Summary of Real Estate Subject to Operating Leases) (Details) - USD ($) | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Property, Plant and Equipment [Line Items] |  |  |
Land and improvements | [1] | $ 2,765,263,000 | $ 2,669,498,000
Buildings and improvements |  | 7,166,833,000 | 6,985,394,000
Leasehold interests |  | 355,000 | 355,000
Real estate subject to operating leases, gross |  | 9,932,451,000 | 9,655,247,000
Less accumulated depreciation and amortization |  | (1,766,177,000) | (1,660,308,000)
Real estate subject to operating leases, net, before work in progress |  | 8,166,274,000 | 7,994,939,000
Work in progress and improvements |  | 49,823,000 | 21,737,000
Accounted for using the operating method |  | 8,216,097,000 | 8,016,676,000
Accounted for using the direct financing method |  | 3,191,000 | 3,352,000
Classified as held for sale |  | 1,904,000 | 786,000
Accounted for using the operating method, net of accumulated depreciation and amortization |  | 8,221,192,000 | 8,020,814,000
Asset under construction |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Land and improvements |  | $ 63,991,000 | $ 22,356,000
[1] |
(1) | Includes $63,991 and $22,356 in land for Properties under construction at June 30, 2023 and December 31, 2022, respectively.

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- Definition The current amount of expenditures for a real estate project that has not yet been completed. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.10) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 + Details
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- Definition Amount, before allowance for credit loss, of net investment in direct financing lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=124258985&loc=SL77919379-209981 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953401-111524 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 14 -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919253-210447 + Details
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