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Debt
 9 Months Ended
Sep. 30, 2023
Debt Disclosure [Abstract]  
Debt DEBT
Long-term debt is as follows:
 SEPTEMBER 30, 2023DECEMBER 31, 2022
 
DEBT
(INCLUSIVE OF
DISCOUNT)
UNAMORTIZED
DEFERRED
FINANCING
COSTS
CARRYING
AMOUNT
FAIR
VALUE
DEBT
(INCLUSIVE OF
DISCOUNT)
UNAMORTIZED
DEFERRED
FINANCING
COSTS
CARRYING
AMOUNT
FAIR
VALUE
Revolving Credit Facility(1)
$1,049,500 $(4,976)$1,044,524 $1,049,500 $1,072,200 $(6,790)$1,065,410 $1,072,200 
Term Loan A(1)
231,250 — 231,250 231,250 240,625 — 240,625 240,625 
Term Loan B(1)(3)
660,992 (2,810)658,182 661,500 666,073 (3,747)662,326 666,750 
Virginia 3 Term Loans26,134 (3,915)22,219 26,134 — — — — 
Australian Dollar Term Loan187,853 (491)187,362 189,349 202,641 (633)202,008 204,623 
UK Bilateral Revolving Credit Facility170,858 — 170,858 170,858 169,361 — 169,361 169,361 
37/8% GBP Senior Notes due 2025 (the "GBP Notes")
488,166 (1,920)486,246 458,959 483,888 (2,589)481,299 445,206 
47/8% Senior Notes due 2027 (the "47/8% Notes due 2027")(2)
1,000,000 (5,688)994,312 913,750 1,000,000 (6,754)993,246 917,500 
51/4% Senior Notes due 2028 (the "51/4% Notes due 2028")(2)
825,000 (5,314)819,686 755,906 825,000 (6,200)818,800 754,875 
5% Senior Notes due 2028 (the "5% Notes due 2028")(2)
500,000 (3,497)496,503 451,250 500,000 (4,039)495,961 450,000 
7% Senior Notes due 2029 (the "7% Notes due 2029")(2)
1,000,000 (11,253)988,747 972,500 — — — — 
47/8% Senior Notes due 2029 (the "47/8% Notes due 2029")(2)
1,000,000 (8,679)991,321 872,500 1,000,000 (9,764)990,236 865,000 
51/4% Senior Notes due 2030 (the "51/4% Notes due 2030")(2)
1,300,000 (10,279)1,289,721 1,124,500 1,300,000 (11,407)1,288,593 1,111,500 
41/2% Senior Notes due 2031 (the "41/2% Notes")(2)
1,100,000 (9,228)1,090,772 902,000 1,100,000 (10,161)1,089,839 891,000 
5% Senior Notes due 2032 (the "5% Notes due 2032")750,000 (11,532)738,468 615,000 750,000 (12,511)737,489 622,500 
55/8% Senior Notes due 2032 (the "55/8% Notes")(2)
600,000 (5,130)594,870 513,000  600,000 (5,566)594,434 520,500 
Real Estate Mortgages, Financing Lease Liabilities and Other502,787 (443)502,344 502,787 425,777 (578)425,199 425,777 
Accounts Receivable Securitization Program349,200 (372)348,828 349,200 314,700 (531)314,169 314,700 
Total Long-term Debt11,741,740 (85,527)11,656,213  10,650,265 (81,270)10,568,995 
Less Current Portion(107,984)— (107,984) (87,546)— (87,546) 
Long-term Debt, Net of Current Portion$11,633,756 $(85,527)$11,548,229  $10,562,719 $(81,270)$10,481,449  
(1)Collectively, the “Credit Agreement”. The Credit Agreement consists of a revolving credit facility (the “Revolving Credit Facility”), a term loan A (the “Term Loan A”) and a term loan B (the "Term Loan B"). The Revolving Credit Facility and the Term Loan A are scheduled to mature on March 18, 2027. The Term Loan B is scheduled to mature on January 2, 2026. The remaining amount available for borrowing under the Revolving Credit Facility as of September 30, 2023 was $1,196,037 (which amount represents the maximum availability as of such date). The weighted average interest rate in effect under the Revolving Credit Facility was 7.2% and 6.2% as of September 30, 2023 and December 31, 2022, respectively.
(2)Collectively, the "Parent Notes". IMI is the direct obligor on the Parent Notes, which are fully and unconditionally guaranteed, on a senior basis, by IMI’s United States subsidiaries that represent the substantial majority of our United States operations (the "Note Guarantors"). These guarantees are joint and several obligations of the Note Guarantors. The remainder of our subsidiaries do not guarantee the Parent Notes.
(3)Due to the discontinuance of the LIBOR reference rate on June 30, 2023, we transitioned the Term Loan B from an interest rate of LIBOR plus 1.75% to a synthetic LIBOR rate plus 1.75%, effective July 1, 2023. All other terms remain the same as what was disclosed in Note 7 to Notes to Consolidated Financial Statements included in our Annual Report.
See Note 7 to Notes to Consolidated Financial Statements included in our Annual Report for additional information regarding our long-term debt, including the direct obligors of each of our debt instruments as well as information regarding the fair value of our debt instruments (including the levels of the fair value hierarchy used to determine the fair value of our debt instruments, which are consistent with the levels of the fair value hierarchy used to determine the fair value of our debt as of September 30, 2023.)
VIRGINIA 3 CREDIT AGREEMENT
On August 31, 2023, Iron Mountain Data Centers Virginia 3, LLC, a wholly owned subsidiary of IMI, entered into a credit agreement (the "Virginia 3 Credit Agreement") in order to partially fund the construction of a data center facility in Virginia. The Virginia 3 Credit Agreement consists of a term loan and a letter of credit facility. We have the option to borrow, in the form of term loans, an aggregate outstanding amount not to exceed $275,000 (the "Virginia 3 Term Loans"). The Virginia 3 Credit Agreement requires the payment of a commitment fee on any unused commitments at a rate of 0.75%. The Virginia 3 Term Loans bear interest at SOFR plus 2.50%. The Virginia 3 Credit Agreement is scheduled to mature on August 31, 2026, at which point all obligations will become due. We have two one-year options that allow us to extend the maturity date beyond August 31, 2026, subject to the conditions specified in the Virginia 3 Credit Agreement. As of September 30, 2023, we have $26,134 in outstanding borrowings in Virginia 3 Term Loans.
MAXIMUM AMOUNT
$275,000

OUTSTANDING BORROWING
$26,134

INTEREST RATE
7.8%
As of September 30, 2023
MAY 2023 OFFERING
On May 15, 2023, IMI completed a private offering of:
SERIES OF NOTESAGGREGATE PRINCIPAL AMOUNTMATURITY DATEINTEREST PAYMENT DUE
PAR CALL DATE(1)
7% Notes due 2029
$1,000,000 February 15, 2029February 15 and August 15August 15, 2025
(1)We may redeem the 7% Notes due 2029 at any time, at our option, in whole or in part. Prior to the par call date, we may redeem the 7% Notes due 2029 at the redemption price or make-whole premium specified in the indenture governing the 7% Notes due 2029, together with accrued and unpaid interest to, but excluding, the redemption date. On or after the par call date, we may redeem the 7% Notes due 2029 at a price equal to 100% of the principal amount being redeemed, together with accrued and unpaid interest to, but excluding, the redemption date.
The 7% Notes due 2029 were issued at 100% of par. The total net proceeds of approximately $990,000 from the issuance of the 7% Notes due 2029, after deducting the initial purchasers' commissions, were used to repay a portion of the outstanding borrowings under our Revolving Credit Facility.
UK BILATERAL REVOLVING CREDIT FACILITY
MAXIMUM AMOUNT
£140,000
OPTIONAL ADDITIONAL COMMITMENTS
£125,000
INTEREST RATE
7.2%
As of September 30, 2023
Iron Mountain (UK) PLC and Iron Mountain (UK) Data Centre Limited (collectively, the "UK Borrowers") have a British pounds sterling Revolving Credit Facility (the "UK Bilateral Revolving Credit Facility") with Barclays Bank PLC. The maximum amount permitted to be borrowed under the UK Bilateral Revolving Credit Facility is 140,000 British pounds sterling, which was fully drawn as of September 30, 2023. We have the option to request additional commitments of up to 125,000 British pounds sterling, subject to conditions specified in the UK Bilateral Revolving Credit Facility.

On September 19, 2023, the UK Borrowers amended the UK Bilateral Revolving Credit Facility to extend the maturity date from September 24, 2024 to September 24, 2025. All other material terms of the UK Bilateral Revolving Credit Facility remain consistent with what was disclosed in Note 7 to Notes to Consolidated Financial Statements included in our Annual Report.
ACCOUNTS RECEIVABLE SECURITIZATION PROGRAM
On June 8, 2023, we amended the Accounts Receivable Securitization Program (as defined in Note 7 to Notes to Consolidated Financial Statements included in our Annual Report) to increase the maximum borrowing capacity from $325,000 to $360,000. All other material terms of the Accounts Receivable Securitization Program remain the same as what was disclosed in Note 7 to Notes to Consolidated Financial Statements included in our Annual Report.
MAXIMUM AMOUNT
$360,000

OUTSTANDING BORROWING
$349,200

INTEREST RATE
6.4%
As of September 30, 2023
LETTERS OF CREDIT
As of September 30, 2023, we had outstanding letters of credit totaling $38,434, of which $4,463 reduce our borrowing capacity under the Revolving Credit Facility. The letters of credit expire at various dates between October 2023 and July 2025.
DEBT COVENANTS
The Credit Agreement, our bond indentures and other agreements governing our indebtedness contain certain restrictive financial and operating covenants, including covenants that restrict our ability to complete acquisitions, pay cash dividends, incur indebtedness, make investments, sell assets and take other specified corporate actions. The covenants do not contain a rating trigger. Therefore, a change in our debt rating would not trigger a default under the Credit Agreement, our bond indentures or other agreements governing our indebtedness. The Credit Agreement requires that we satisfy a net total lease adjusted leverage ratio and a fixed charge coverage ratio on a quarterly basis and our bond indentures require that, among other things, we satisfy a leverage ratio (not lease adjusted) or a fixed charge coverage ratio (not lease adjusted) as a condition to taking actions such as paying dividends and incurring indebtedness.
The Credit Agreement uses earnings before interest, taxes, depreciation and amortization and rent expense ("EBITDAR") based calculations and the bond indentures use earnings before interest, taxes, depreciation and amortization ("EBITDA") based calculations as the primary measures of financial performance for purposes of calculating leverage and fixed charge coverage ratios. The EBITDAR- and EBITDA-based leverage calculations include our consolidated subsidiaries, other than those we have designated as "Unrestricted Subsidiaries" as defined in the Credit Agreement and bond indentures. Generally, the Credit Agreement and the bond indentures use a trailing four fiscal quarter basis for purposes of the relevant calculations and require certain adjustments and exclusions for purposes of those calculations, which make the calculation of financial performance for purposes of those calculations under the Credit Agreement and bond indentures not directly comparable to Adjusted EBITDA as presented herein. We are in compliance with our leverage and fixed charge coverage ratios under the Credit Agreement, our bond indentures and other agreements governing our indebtedness as of September 30, 2023. Noncompliance with these leverage and fixed charge coverage ratios would have a material adverse effect on our financial condition and liquidity.