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Leases - Ground Leases (Details) ft² in Millions, $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 USD ($) property lease | Jun. 30, 2021 USD ($) | Jun. 30, 2022 USD ($) ft² property lease | Jun. 30, 2021 USD ($)
Lessee, Lease, Description [Line Items] |  |  |  |
Number of properties subject to ground leases | property | 108 |  | 108 |
Square feet subject to ground leases | ft² |  |  | 8.9 |
Number of prepaid ground leases |  |  | 41 |
Amortization of prepaid rent | $ | $ 0.1 | $ 0.2 | $ 0.3 | $ 0.3
Number of non-prepaid ground leases | 67 |  | 67 |
Minimum |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |
Ground lease, initial term | 40 years |  | 40 years |
Maximum |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |
Ground lease, initial term | 99 years |  | 99 years |

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- Definition Amortization of Prepaid Rent + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition Number of Ground Leases, Excluding Prepaid Leases + References No definition available. + Details
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- Definition Number of Ground Leases Prepaid + References No definition available. + Details
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- Definition Square Feet Subject to Ground Leases + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918673-209980 + Details
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- Definition Number of separate real estate development properties located on land subject to ground leases. + References No definition available. + Details
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- Details
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