XML 59 R75.htm IDEA: XBRL DOCUMENT
v3.19.3

Stockholders' Equity Matters - Dividends Declared (Details) $ / shares in Units, $ in Thousands |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 02, 2019 USD ($) | Jul. 26, 2019 $ / shares | Jul. 02, 2019 USD ($) | May 22, 2019 $ / shares | Apr. 02, 2019 USD ($) | Feb. 07, 2019 $ / shares | Jan. 03, 2019 USD ($) | Oct. 25, 2018 $ / shares | Oct. 02, 2018 USD ($) | Jul. 24, 2018 $ / shares | Jul. 02, 2018 USD ($) | May 24, 2018 $ / shares | Apr. 02, 2018 USD ($) | Feb. 14, 2018 $ / shares | Oct. 31, 2017 USD ($) bank | Sep. 30, 2019 USD ($) | Sep. 30, 2018 USD ($) | Sep. 30, 2019 USD ($) shares | Sep. 30, 2018 USD ($)
Subsidiary or Equity Method Investee [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividend Per Share (in dollars per share) | $ / shares |  | $ 0.6110 |  | $ 0.6110 |  | $ 0.6110 |  | $ 0.6110 |  | $ 0.5875 |  | $ 0.5875 |  | $ 0.5875 |  |  |  |  |
Total Amount |  |  | $ 175,389 |  | $ 175,242 |  | $ 174,935 |  | $ 168,148 |  | $ 168,078 |  | $ 167,969 |  |  | $ 176,665 | $ 169,186 | $ 529,767 | $ 507,437
Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary or Equity Method Investee [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Amount | $ 175,434 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
At The Market (ATM) Equity Program |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary or Equity Method Investee [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of banks | bank |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 |  |  |  |
Aggregate sales price of common stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 500,000 |  |  |  |
Shares of common stock sold (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |
Remaining aggregate sale price of shares of common stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 431,200 |  | $ 431,200 |

X
- Definition Number Of Banks + References No definition available. + Details
Name: | irm_NumberOfBanks
Namespace Prefix: | irm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Sale of Stock, Authorized Amount + References No definition available. + Details
Name: | irm_SaleofStockAuthorizedAmount
Namespace Prefix: | irm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Sale of Stock, Remaining Aggregate Sale Price Of Stock Available For Distribution + References No definition available. + Details
Name: | irm_SaleofStockRemainingAggregateSalePriceOfStockAvailableForDistribution
Namespace Prefix: | irm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
Name: | us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of paid and unpaid common stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 405 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957935&loc=d3e64057-112817 + Details
Name: | us-gaap_DividendsCommonStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The number of shares issued or sold by the subsidiary or equity method investee per stock transaction. + References No definition available. + Details
Name: | us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_SubsidiaryOrEquityMethodInvesteeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=irm_AtTheMarketATMEquityProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |