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Investments in Real Estate - Investments in Existing Properties (Details) - Investments in existing properties - USD ($) $ in Thousands | 6 Months Ended
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Jun. 30, 2019 | Jun. 30, 2018
Investments in real estate properties |  |
Improvements | $ 6,100 | $ 5,600
Re-leasing costs | 1,000 | 2,500
Recurring capital expenditures | 172 | 147
Nonrecurring building improvements | $ 4,900 | $ 3,000

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- Definition Amount of nonrecurring building real estate improvements related to real estate investments during the period. + References No definition available. + Details
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Namespace Prefix: | o_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Amount of re-leasing costs related to real estate investments during the period. + References No definition available. + Details
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Namespace Prefix: | o_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Amount of recurring capital expenditures real estate improvements related to real estate investments during the period. + References No definition available. + Details
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Namespace Prefix: | o_
Data Type: | xbrli:monetaryItemType
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- Definition Amount of land and buildings and improvements made to real estate investments and capitalized after acquisition for entities with a substantial portion of business acquiring and holding investment real estate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 970 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-28(Column D)) -URI http://asc.fasb.org/extlink&oid=6590653&loc=d3e638233-123024 + 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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- Details
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