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Leases - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Lessee, Lease, Description [Line Items] |  |
Straight line rent adjustment |  | $ 49,241
Rental and other revenues related to operating lease payments | $ 356,390 | 302,843
Rental and other revenues related to operating lease payments, variable leases | 48,074 | 46,026
Resident fees and services |  |
Lessee, Lease, Description [Line Items] |  |
Revenue from contract with customer | 994,335 | 723,464
Resident fees and services | Seniors Housing Operating |  |
Lessee, Lease, Description [Line Items] |  |
Revenue from contract with customer | $ 94,827 | $ 15,771
Minimum |  |
Lessee, Lease, Description [Line Items] |  |
Lease term extension period | 1 year |
Maximum |  |
Lessee, Lease, Description [Line Items] |  |
Lease term extension period | 25 years |

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- Definition Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=124258985&loc=SL77919372-209981 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123420820&loc=SL77919311-209978 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 6A -URI http://asc.fasb.org/extlink&oid=124502072&loc=SL77927221-108306 + Details
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