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Summary of Significant Accounting Policies - Leases Narrative (Details) $ in Thousands | Mar. 31, 2023 USD ($)
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Accounting Policies [Abstract] |
Operating leases not yet commenced, term | 25 years
Operating leases not yet commenced | $ 170,100

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- Definition Lessee, Operating Lease, Leases Not Yet Commenced, Liability + References No definition available. + Details
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Namespace Prefix: | irm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Term of lessee's operating lease not yet commenced, 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 (b) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918673-209980 + Details
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Balance Type: | na
Period Type: | instant