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Summary of Significant Accounting Policies (Tables)
9 Months Ended
Sep. 30, 2021
Accounting Policies [Abstract]  
Schedule of allowance for credit loss . The rollforward of the allowance for doubtful accounts and credit memo reserves for the nine months ended September 30, 2021 is as follows:
Balance as of December 31, 2020$56,981 
Credit memos charged to revenue29,996 
Allowance for bad debts charged to expense16,371 
Deductions and other(1)
(43,134)
Balance as of September 30, 2021$60,214 
(1)Primarily consists of the issuance of credit memos, the write-off of accounts receivable, allowances associated with businesses acquired and the impact associated with currency translation adjustments.
Schedule of operating and financing lease right-of-use assets and lease liabilities Operating and financing lease right-of-use assets and lease liabilities as of September 30, 2021 and December 31, 2020 are as follows:
DESCRIPTIONSEPTEMBER 30, 2021DECEMBER 31, 2020
Assets:
Operating lease right-of-use assets$2,308,047 $2,196,502 
Financing lease right-of-use assets, net of accumulated depreciation(1)
307,032 310,534 
Liabilities:
Current
Operating lease liabilities$257,884 $250,239 
Financing lease liabilities(1)
42,442 43,149 
Long-term
Operating lease liabilities$2,164,449 $2,044,598 
Financing lease liabilities(1)
321,682 323,162 
(1)Financing lease right-of-use assets, current financing lease liabilities and long-term financing lease liabilities are included within Property, Plant and Equipment, Net, Current portion of long-term debt and Long-term Debt, net of current portion, respectively, within our Condensed Consolidated Balance Sheets.
Schedule of lease, cost
The components of the lease expense for the three and nine months ended September 30, 2021 and 2020 are as follows:
THREE MONTHS ENDED SEPTEMBER 30,NINE MONTHS ENDED SEPTEMBER 30,
DESCRIPTION2021202020212020
Operating lease cost(1)
$140,551 $122,737 $408,312 $365,303 
Financing lease cost:
Depreciation of financing lease right-of-use assets$14,006 $12,973 $39,062 $38,495 
Interest expense for financing lease liabilities5,055 4,891 14,940 14,664 
(1)Operating lease cost, the majority of which is included in Cost of sales, includes variable lease costs of $28,835 and $86,422 for the three and nine months ended September 30, 2021, respectively, and $27,486 and $82,287 for the three and nine months ended September 30, 2020, respectively.
Supplemental cash flow information relating to our leases for the nine months ended September 30, 2021 and 2020 is as follows:
NINE MONTHS ENDED SEPTEMBER 30,
CASH PAID FOR AMOUNTS INCLUDED IN MEASUREMENT OF LEASE LIABILITIES:20212020
Operating cash flows used in operating leases$291,535 $266,619 
Operating cash flows used in financing leases (interest)14,940 14,664 
Financing cash flows used in financing leases35,360 36,008 
NON-CASH ITEMS:
Operating lease modifications and reassessments$103,158 $89,727 
New operating leases (including acquisitions and sale-leaseback transactions)240,822 173,635 
Schedule of changes in the carrying value of goodwill attributable to each reportable operating segment
The changes in the carrying value of goodwill attributable to each reportable operating segment for the nine months ended September 30, 2021 are as follows:
GLOBAL RIM BUSINESSGLOBAL DATA CENTER BUSINESSCORPORATE AND OTHER BUSINESSTOTAL CONSOLIDATED
Goodwill balance, net of accumulated amortization as of December 31, 2020$4,024,182 $436,987 $96,440 $4,557,609 
Non-tax deductible goodwill acquired during the period17,180 — 9,991 27,171 
Goodwill allocated to IPM Divestment — — (46,105)(46,105)
Fair value and other adjustments(6,091)— (1,268)(7,359)
Currency effects(49,737)(7,995)(943)(58,675)
Goodwill balance, net accumulated amortization as of September 30, 2021$3,985,534 $428,992 $58,115 $4,472,641 
Accumulated goodwill impairment balance as of September 30, 2021$132,409 $— $26,011 $158,420 
Schedule of equity method investments The carrying values and equity interests in our joint ventures at September 30, 2021 and December 31, 2020 are as follows:
SEPTEMBER 30, 2021DECEMBER 31, 2020
CARRYING VALUEEQUITY INTERESTCARRYING VALUEEQUITY INTEREST
Web Werks JV
$51,257 38 %$— — %
Joint venture with AGC Equity Partners (the “Frankfurt JV”)
26,272 20 %26,500 20 %
Joint venture with MakeSpace Labs, Inc. (the “MakeSpace JV”)
27,419 48 %16,924 39 %
Schedule of assets and liabilities carried at fair value measured on a recurring basis
The assets and liabilities carried at fair value measured on a recurring basis as of September 30, 2021 and December 31, 2020 are as follows:
  FAIR VALUE MEASUREMENTS AT SEPTEMBER 30, 2021 USING
DESCRIPTIONTOTAL CARRYING
VALUE AT
SEPTEMBER 30, 2021
QUOTED PRICES IN
ACTIVE MARKETS
(LEVEL 1)
SIGNIFICANT OTHER
OBSERVABLE INPUTS
(LEVEL 2)
SIGNIFICANT
UNOBSERVABLE
INPUTS (LEVEL 3)
Money Market Funds$9,186 $— $9,186 $— 
Time Deposits2,175 — 2,175 — 
Trading Securities11,713 11,572  141  — 
Derivative Assets1,214 — 1,214 — 
Derivative Liabilities15,412 — 15,412 — 
  FAIR VALUE MEASUREMENTS AT DECEMBER 31, 2020 USING
DESCRIPTIONTOTAL CARRYING
VALUE AT
DECEMBER 31, 2020
QUOTED PRICES IN
ACTIVE MARKETS
(LEVEL 1)
SIGNIFICANT OTHER
OBSERVABLE INPUTS
(LEVEL 2)
SIGNIFICANT
UNOBSERVABLE
INPUTS (LEVEL 3)
Money Market Funds$62,657 $— $62,657 $— 
Time Deposits2,121 — 2,121 — 
Trading Securities10,892 10,636  256  — 
Derivative Liabilities49,703 — 49,703 — 
Schedule of changes in accumulated other comprehensive items, net
The changes in accumulated other comprehensive items, net for the three and nine months ended September 30, 2021 and 2020 are as follows:
THREE MONTHS ENDED SEPTEMBER 30, 2021NINE MONTHS ENDED SEPTEMBER 30, 2021
 FOREIGN
CURRENCY
TRANSLATION AND OTHER
ADJUSTMENTS
CHANGE IN FAIR VALUE OF
DERIVATIVE
INSTRUMENTS
TOTALFOREIGN
CURRENCY
TRANSLATION AND OTHER
ADJUSTMENTS
CHANGE IN FAIR VALUE OF DERIVATIVE INSTRUMENTSTOTAL
Beginning of Period$(229,790)$(28,863)$(258,653)$(206,190)$(49,703)$(255,893)
Other comprehensive (loss) income):
Foreign currency translation and other adjustments(90,465)— (90,465)(114,065)— (114,065)
Change in fair value of derivative instruments— 14,665 14,665 — 35,505 35,505 
Total other comprehensive (loss) income (90,465)14,665 (75,800)(114,065)35,505 (78,560)
End of Period$(320,255)$(14,198)$(334,453)$(320,255)$(14,198)$(334,453)
THREE MONTHS ENDED SEPTEMBER 30, 2020NINE MONTHS ENDED SEPTEMBER 30, 2020
 FOREIGN
CURRENCY
TRANSLATION AND OTHER
ADJUSTMENTS
CHANGE IN FAIR VALUE OF
DERIVATIVE
INSTRUMENTS
TOTALFOREIGN
CURRENCY
TRANSLATION AND OTHER
ADJUSTMENTS
CHANGE IN FAIR VALUE OF DERIVATIVE INSTRUMENTSTOTAL
Beginning of Period$(406,444)$(21,079)$(427,523)$(252,825)$(9,756)$(262,581)
Other comprehensive income (loss):
Foreign currency translation and other adjustments44,529 — 44,529 (109,090)— (109,090)
Change in fair value of derivative instruments— (184)(184)— (11,507)(11,507)
Total other comprehensive income (loss) 44,529 (184)44,345 (109,090)(11,507)(120,597)
End of Period$(361,915)$(21,263)$(383,178)$(361,915)$(21,263)$(383,178)
Schedule of cost and accumulated amortization associated with contract fulfillment costs
The costs associated with the initial movement of customer records into physical storage and certain commissions are considered costs to obtain or fulfill customer contracts (collectively, “Contract Fulfillment Costs”). Contract Fulfillment Costs as of September 30, 2021 and December 31, 2020 are as follows:
SEPTEMBER 30, 2021DECEMBER 31, 2020
GROSS
CARRYING
AMOUNT
ACCUMULATED
AMORTIZATION
NET
CARRYING
AMOUNT
GROSS
CARRYING
AMOUNT
ACCUMULATED
AMORTIZATION
NET
CARRYING
AMOUNT
Intake Costs asset$71,540 $(41,246)$30,294 $63,721 $(33,352)$30,369 
Commissions asset107,298 (48,708)58,590 91,069 (38,787)52,282 
Schedule of deferred revenue liabilities
Deferred revenue liabilities are reflected in our Condensed Consolidated Balance Sheets as follows:
DESCRIPTIONLOCATION IN BALANCE SHEETSEPTEMBER 30, 2021DECEMBER 31, 2020
Deferred revenue - CurrentDeferred revenue$257,593 $295,785 
Deferred revenue - Long-termOther Long-term Liabilities34,342 35,612 
Schedule of revenue
Our Global Data Center Business features storage rental provided to customers at contractually specified rates over a fixed contractual period, which are accounted for in accordance with Accounting Standards Update ("ASU") No. 2016-02, Leases (Topic 842), as amended. Storage rental revenue, including revenue associated with power and connectivity, associated with our Global Data Center Business for the three and nine months ended September 30, 2021 and 2020 are as follows:
THREE MONTHS ENDED SEPTEMBER 30,NINE MONTHS ENDED
SEPTEMBER 30,
2021202020212020
Storage rental revenue(1)
$72,411 $68,416 $210,805 $196,823 
(1)Revenue associated with power and connectivity included within storage rental revenue was $14,639 and $42,333 for the three and nine months ended September 30, 2021, respectively, and $12,033 and $34,986 for the three and nine months ended September 30, 2020, respectively.
Schedule of stock-based compensation expense
Stock-based compensation expense for the cost of stock options, restricted stock units (“RSUs”), performance units (“PUs”) and shares of stock issued under our employee stock purchase plan (collectively, “Employee Stock-Based Awards”) for the three and nine months ended September 30, 2021 and 2020 is as follows:
THREE MONTHS ENDED SEPTEMBER 30,NINE MONTHS ENDED
SEPTEMBER 30,
2021202020212020
Stock-based compensation expense$13,200 $8,946 $46,852 $35,618 
Schedule of vested and expected to vest
The fair value of RSUs and earned PUs that vested during the three and nine months ended September 30, 2021 and 2020 is as follows:
THREE MONTHS ENDED SEPTEMBER 30,NINE MONTHS ENDED
SEPTEMBER 30,
 2021202020212020
Fair value of RSUs vested$8,425 $2,766 $31,404 $24,411 
Fair value of earned PUs that vested22,030 1,370 27,856 12,421 
Schedule of components of gain/loss on sale/disposal of property, plant and equipment
THREE MONTHS ENDED SEPTEMBER 30,NINE MONTHS ENDED
SEPTEMBER 30,
2021
2020(1)
2021(2)
2020(1)
(Gain) Loss on disposal/write-down of property, plant and equipment, net (3)
$(935)$(75,840)$(134,321)$(78,170)
(1) The gains for both the three and nine months ended September 30, 2020 primarily consisted of gains of approximately $76,400 associated with the sale-leaseback transactions of two facilities in the United States.
(2) The gains for the nine months ended September 30, 2021 primarily consisted of gains of approximately $127,400 associated with the sale-leaseback transactions of five facilities in the United Kingdom, which occurred during the second quarter of 2021.
(3) The gains recognized during both 2021 and 2020 are a result of our program to monetize a small portion of our industrial assets. The terms for these leases are consistent with the terms of our lease portfolio, which are disclosed in detail in Note 2.i. to Notes to Consolidated Financial Statements included in our Annual Report
Schedule of other (income) expense, net
Consolidated other (income) expense, net for the three and nine months ended September 30, 2021 and 2020 consists of the following:
 THREE MONTHS ENDED SEPTEMBER 30,NINE MONTHS ENDED
SEPTEMBER 30,
DESCRIPTION2021202020212020
Foreign currency transaction (gains) losses, net$(23,200)$29,635 $(16,157)$(6,293)
Debt extinguishment expense— 51,260 — 68,300 
Other, net(1)
4,699 2,570 (183,861)4,432 
Other (Income) Expense, Net$(18,501)$83,465 $(200,018)$66,439 
(1)Other, net for the nine months ended September 30, 2021 is primarily comprised of (a) a gain of approximately $180,600 associated with our IPM Divestment and (b) a gain of approximately $20,300 associated with the loss of control and related deconsolidation, as of May 18, 2021, of one of our wholly owned Netherlands subsidiaries, for which we had value-added tax liability exposure that was recorded in 2019.
Schedule of income taxes
Our effective tax rates for the three and nine months ended September 30, 2021 and 2020 are as follows:
 THREE MONTHS ENDED SEPTEMBER 30,NINE MONTHS ENDED
SEPTEMBER 30,
2021202020212020
Effective Tax Rate(1)
29.1 %26.5 %28.1 %25.7 %
(1)The primary reconciling items between the federal statutory tax rate of 21.0% and our overall effective tax rate for the three and nine months ended September 30, 2021 and 2020 were the impacts of differences in the tax rates at which our foreign earnings are subject, partially offset by the benefits derived from the dividends paid deduction. The costs associated with Project Summit (as defined in Note 11) are more heavily weighted to our United States qualified REIT subsidiaries ("QRSs"), and, therefore, provide no tax benefit. Additionally, the nine months ended September 30, 2021, reflects a discrete tax expense of approximately $12,000 primarily resulting from a tax law change in the United Kingdom.
Schedule of calculation of basic and diluted net income (loss) per share attributable to the entity
The calculation of basic and diluted income (loss) per share for the three and nine months ended September 30, 2021 and 2020 are as follows:
 
THREE MONTHS ENDED
SEPTEMBER 30,
NINE MONTHS ENDED
SEPTEMBER 30,
 2021202020212020
Net Income (Loss)$68,111 $38,562 $391,264 $96,341 
Less: Net Income (Loss) Attributable to Noncontrolling Interests428 168 2,693 1,058 
Net Income (Loss) Attributable to Iron Mountain Incorporated (utilized in numerator of Earnings Per Share calculation)$67,683 $38,394 $388,571 $95,283 
Weighted-average shares—basic289,762,000 288,403,000 289,255,000 288,105,000 
Effect of dilutive potential stock options869,600 14,758 522,642 28,723 
Effect of dilutive potential RSUs and PUs850,655 392,943 918,954 337,588 
Weighted-average shares—diluted291,482,255 288,810,701 290,696,596 288,471,311 
Net Income (Loss) Per Share Attributable to Iron Mountain Incorporated:    
 Basic$0.23 $0.13 $1.34 $0.33 
 Diluted$0.23 $0.13 $1.34 $0.33 
Antidilutive stock options, RSUs and PUs, excluded from the calculation351,673 5,529,126 1,813,880 5,959,693