Iron Mountain (IRM) 10-K 24 Feb 21 2020 FY Annual report Financial data

Cover Page

Cover Page - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2020	Feb. 19, 2021	Jun. 30, 2020
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
Document Transition Report	false
Entity File Number	1-13045
Entity Registrant Name	IRON MOUNTAIN INC
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	23-2588479
Entity Address, Address Line One	One Federal Street
Entity Address, City or Town	Boston
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	02110
City Area Code	617
Local Phone Number	535-4766
Title of 12(b) Security	Common Stock, $.01 par value per share
Trading Symbol	IRM
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Emerging Growth Company	false
Entity Shell Company	false
ICFR Auditor Attestation Flag	true
Entity Public Float			$ 7.4
Entity Common Stock, Shares Outstanding		288,421,215
Documents Incorporated by Reference	DOCUMENTS INCORPORATED BY REFERENCECertain information required in Items 10, 11, 12, 13 and 14 of Part III of this Annual Report on Form 10-K (the “Annual Report”) is incorporated by reference from our definitive Proxy Statement for our 2021 Annual Meeting of Stockholders (our “Proxy Statement”) to be filed with the Securities and Exchange Commission (the “SEC”) within 120 days after the close of the fiscal year ended December 31, 2020.
Entity Central Index Key	0001020569
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Amendment Flag	false

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current Assets:
Cash and cash equivalents	$ 205,063	$ 193,555
Accounts receivable (less allowances of $56,981 and $42,856 as of December 31, 2020 and 2019, respectively)	859,344	850,701
Prepaid expenses and other	205,380	192,083
Total Current Assets	1,269,787	1,236,339
Property, Plant and Equipment:
Property, plant and equipment	8,246,337	8,048,906
Less—Accumulated depreciation	(3,743,894)	(3,425,869)
Property, Plant and Equipment, net	4,502,443	4,623,037
Other Assets, Net:
Goodwill	4,557,609	4,485,209
Customer relationships, customer inducements and data center lease-based intangibles	1,326,977	1,393,183
Operating lease right-of-use assets	2,196,502	1,869,101
Other	295,949	209,947
Total Other Assets, Net	8,377,037	7,957,440
Total Assets	14,149,267	13,816,816
Current Liabilities:
Current portion of long-term debt	193,759	389,013
Accounts payable	359,863	324,708
Accrued expenses and other current liabilities (includes current portion of operating lease liabilities)	1,146,288	961,752
Deferred revenue	295,785	274,036
Total Current Liabilities	1,995,695	1,949,509
Long-term Debt, net of current portion	8,509,555	8,275,566
Long-term Operating Lease Liabilities, net of current portion	2,044,598	1,728,686
Other Long-term Liabilities	204,508	143,018
Deferred Income Taxes	198,377	188,128
Commitments and Contingencies
Redeemable Noncontrolling Interests	59,805	67,682
Iron Mountain Incorporated Stockholders’ Equity:
Preferred stock (par value $0.01; authorized 10,000,000 shares; none issued and outstanding)	0	0
Common stock (par value $0.01; authorized 400,000,000 shares; issued and outstanding 288,273,049 shares and 287,299,645 shares as of December 31, 2020 and 2019, respectively)	2,883	2,873
Additional paid-in capital	4,340,078	4,298,566
(Distributions in excess of earnings) Earnings in excess of distributions	(2,950,339)	(2,574,896)
Accumulated other comprehensive items, net	(255,893)	(262,581)
Total Iron Mountain Incorporated Stockholders’ Equity	1,136,729	1,463,962
Noncontrolling Interests	0	265
Total Equity	1,136,729	1,464,227
Total Liabilities and Equity	$ 14,149,267	$ 13,816,816

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Allowance for credit loss	$ 56,981	$ 42,856
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred Stock, Shares Authorized	10,000,000	10,000,000
Preferred Stock, Shares Issued	0	0
Preferred Stock, Shares Outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, Shares Authorized	400,000,000	400,000,000
Common Stock, Shares, Issued	288,273,049	287,299,645
Common Stock, Shares, Outstanding	288,273,049	287,299,645

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues:
Storage rental	$ 2,754,091	$ 2,681,087	$ 2,622,455
Service	1,393,179	1,581,497	1,603,306
Total Revenues	4,147,270	4,262,584	4,225,761
Operating Expenses:
Cost of sales (excluding depreciation and amortization)	1,757,342	1,833,315	1,793,954
Selling, general and administrative	949,215	991,664	1,006,983
Depreciation and amortization	652,069	658,201	639,514
Significant Acquisition Costs	0	13,293	50,665
Restructuring Charges	194,396	48,597	0
Intangible impairments	23,000	0	0
(Gain) loss on disposal/write-down of property, plant and equipment, net	(363,537)	(63,824)	(73,622)
Total Operating Expenses	3,212,485	3,481,246	3,417,494
Operating (Loss) Income	934,785	781,338	808,267
Interest Expense, Net (includes Interest Income of $8,312, $6,559 and $6,553 in 2020, 2019 and 2018, respectively)	418,535	419,298	409,648
Other expense (income), net, excluding our share of losses (gains) from our unconsolidated joint ventures(1)	143,545	33,898	(11,692)
Income (Loss) from Continuing Operations Before Provision (Benefit) for Income Taxes	372,705	328,142	410,311
Provision (Benefit) for Income Taxes	29,609	59,931	42,753
Income (Loss) from Continuing Operations	343,096	268,211	367,558
Income (Loss) from Discontinued Operations, Net of Tax	0	104	(12,427)
Net Income (Loss)	343,096	268,315	355,131
Less: Net Income (Loss) Attributable to Noncontrolling Interests	403	938	1,198
Net Income (Loss) Attributable to Iron Mountain Incorporated	$ 342,693	$ 267,377	$ 353,933
Earnings (Losses) per Share—Basic:
Income (loss) from continuing operations (in dollars per share)	$ 1.19	$ 0.93	$ 1.28
Total (loss) income from discontinued operations, net of tax (in dollars per share)	0	0	(0.04)
Net income (loss) attributable to iron mountain incorporated (in dollars per share)	1.19	0.93	1.24
Earnings (Losses) per Share—Diluted:
Income (loss) from continuing operations (in dollars per share)	1.19	0.93	1.28
Total (loss) income from discontinued operations, net of tax (in dollars per share)	0	0	(0.04)
Net Income (Loss) Attributable to Iron Mountain Incorporated (in dollars per share)	$ 1.19	$ 0.93	$ 1.23
Weighted average common shares outstanding-basic (in shares)	288,183,000	286,971,000	285,913,000
Weighted average common shares outstanding-diluted (in shares)	288,643,190	287,686,944	286,652,588

CONSOLIDATED STATEMENTS OF OP_2

CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Statement [Abstract]
Interest Income	$ 8,312	$ 6,559	$ 6,553

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 343,096	$ 268,315	$ 355,131
Other Comprehensive Income (Loss):
Foreign Currency Translation Adjustment	45,779	11,994	(164,107)
Change in Fair Value of Derivative Instruments	(39,947)	(8,783)	(973)
Total Other Comprehensive Income (Loss)	5,832	3,211	(165,080)
Comprehensive Income (Loss)	348,928	271,526	190,051
Comprehensive (Loss) Income Attributable to Noncontrolling Interests	(453)	1,066	(2,207)
Comprehensive Income (Loss) Attributable to Iron Mountain Incorporated	$ 349,381	$ 270,460	$ 192,258

CONSOLIDATED STATEMENTS OF EQUI

CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Adjustment	COMMON STOCK	ADDITIONAL PAID-IN CAPITAL	EARNINGS IN EXCESS OF DISTRIBUTIONS (DISTRIBUTIONS IN EXCESS OF EARNINGS)	EARNINGS IN EXCESS OF DISTRIBUTIONS (DISTRIBUTIONS IN EXCESS OF EARNINGS)Adjustment	ACCUMULATED OTHER COMPREHENSIVE ITEMS, NET	NONCONTROLLING INTERESTS	REDEEMABLE NONCONTROLLING INTERESTS	Over-Allotment Option	Over-Allotment OptionCOMMON STOCK	Over-Allotment OptionADDITIONAL PAID-IN CAPITAL	At The Market (ATM) Equity Program	At The Market (ATM) Equity ProgramCOMMON STOCK	At The Market (ATM) Equity ProgramADDITIONAL PAID-IN CAPITAL
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201602Member
Stockholders' equity, beginning balance at Dec. 31, 2017	$ 2,285,134	$ (30,233)	$ 2,831	$ 4,164,562	$ (1,779,674)	$ (30,233)	$ (103,989)	$ 1,404
Balance (in shares) at Dec. 31, 2017			283,110,183
Increase (Decrease) in Stockholders' Equity
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation	30,020		$ 8	30,012
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation (in shares)			762,340
Issuance of shares										$ 76,192	$ 22	$ 76,170	$ 8,716	$ 2	$ 8,714
Issuance of shares (in shares)											2,175,000			273,486
Changes in equity related redeemable noncontrolling interests	(16,110)			(16,110)					$ (16,151)
Parent cash dividends declared	(683,519)				(683,519)
Foreign currency translation adjustment	(160,548)						(160,702)	154
Change in fair value of derivative instruments	(973)						(973)
Net income (loss)	353,784				353,933			(149)
Stockholders' equity, ending balance at Dec. 31, 2018	1,862,463	$ 5,781	$ 2,863	4,263,348	(2,139,493)	$ 5,781	(265,664)	1,409
Balance (in shares) at Dec. 31, 2018			286,321,009
Balance at Dec. 31, 2017									91,418
Increase (Decrease) in Temporary Equity [Roll Forward]
Foreign currency translation adjustment									(3,559)
Net income (loss)									1,347
Noncontrolling interests dividends									(2,523)
Balance at Dec. 31, 2018									70,532
Increase (Decrease) in Stockholders' Equity
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation	36,682		$ 10	36,672
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation (in shares)			978,636
Changes in equity related redeemable noncontrolling interests	(1,454)			(1,454)					(3,136)
Parent cash dividends declared	(708,561)				(708,561)
Foreign currency translation adjustment	11,866						11,866
Change in fair value of derivative instruments	(8,783)						(8,783)
Net income (loss)	266,233				267,377			(1,144)
Stockholders' equity, ending balance at Dec. 31, 2019	$ 1,464,227		$ 2,873	4,298,566	(2,574,896)		(262,581)	265
Balance (in shares) at Dec. 31, 2019	287,299,645		287,299,645
Increase (Decrease) in Temporary Equity [Roll Forward]
Foreign currency translation adjustment									128
Net income (loss)									2,082
Noncontrolling interests dividends									(1,924)
Balance at Dec. 31, 2019	$ 67,682								67,682
Increase (Decrease) in Stockholders' Equity
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation	37,995		$ 10	37,985
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation (in shares)			973,404
Changes in equity related redeemable noncontrolling interests	3,527			3,527					(4,924)
Parent cash dividends declared	(718,136)				(718,136)
Foreign currency translation adjustment	46,748						46,635	113
Change in fair value of derivative instruments	(39,947)						(39,947)
Net income (loss)	342,315				342,693			(378)
Stockholders' equity, ending balance at Dec. 31, 2020	$ 1,136,729		$ 2,883	$ 4,340,078	$ (2,950,339)		$ (255,893)	$ 0
Balance (in shares) at Dec. 31, 2020	288,273,049		288,273,049
Increase (Decrease) in Temporary Equity [Roll Forward]
Foreign currency translation adjustment									(969)
Net income (loss)									781
Noncontrolling interests dividends									(2,765)
Balance at Dec. 31, 2020	$ 59,805								$ 59,805

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash Flows from Operating Activities:
Net Income (Loss)	$ 343,096	$ 268,315	$ 355,131
(Income) loss from discontinued operations	0	(104)	12,427
Adjustments to reconcile net income (loss) to cash flows from operating activities:
Depreciation	447,562	456,323	452,740
Amortization (includes amortization of deferred financing costs and discounts of $17,376, $16,740 and $15,675 in 2020, 2019 and 2018, respectively)	221,883	218,618	202,449
Intangible impairments	23,000	0	0
Revenue reduction associated with amortization of permanent withdrawal fees and data center above- and below-market leases	9,878	13,703	16,281
Stock-based compensation expense	37,674	35,654	31,167
(Benefit) provision for deferred income taxes	(12,986)	(624)	(4,239)
Loss on early extinguishment of debt	68,300	0	0
(Gain) loss on disposal/write-down of property, plant and equipment, net	(363,537)	(63,824)	(74,134)
Foreign currency transactions and other, net	78,437	29,838	(16,395)
(Increase) decrease in assets	(15,443)	5,404	(36,054)
Increase (decrease) in liabilities	149,793	3,352	(2,829)
Cash Flows from Operating Activities-Continuing Operations	987,657	966,655	936,544
Cash Flows from Operating Activities-Discontinued Operations	0	0	(995)
Cash Flows from Operating Activities	987,657	966,655	935,549
Cash Flows from Investing Activities:
Capital expenditures	(438,263)	(692,983)	(460,062)
Cash paid for acquisitions, net of cash acquired	(118,581)	(58,237)	(1,758,557)
Acquisition of customer relationships	(4,346)	(46,105)	(63,577)
Customer inducements	(10,644)	(9,371)	(8,902)
Contract fulfillment costs and third party commissions	(60,020)	(76,171)	(26,208)
Net proceeds from divestments	0	0	1,019
Investments in Joint Ventures and other investments	(18,250)	(19,222)	0
Proceeds from sales of property and equipment and other, net (including real estate)	564,664	166,143	86,159
Cash Flows from Investing Activities-Continuing Operations	(85,440)	(735,946)	(2,230,128)
Cash Flows from Investing Activities-Discontinued Operations	0	5,061	8,250
Cash Flows from Investing Activities	(85,440)	(730,885)	(2,221,878)
Cash Flows from Financing Activities:
Repayment of revolving credit facilities, term loan facilities and other debt	(8,604,394)	(14,535,115)	(14,192,139)
Proceeds from revolving credit facilities, term loan facilities and other debt	7,939,458	14,059,818	15,351,614
Early redemption of senior subordinated and senior notes, including call premiums	(2,942,554)	0	0
Net proceeds from sales of senior notes	3,465,000	987,500	0
Debt repayment and equity distribution to noncontrolling interests	(2,765)	(1,924)	(2,523)
Parent cash dividends	(716,290)	(704,526)	(673,635)
Net proceeds associated with the Equity Offering, including Over-Allotment Option	0	0	76,192
Net proceeds associated with the At The Market (ATM) Program	0	0	8,716
Net proceeds (payments) associated with employee stock-based awards	321	1,027
Net proceeds (payments) associated with employee stock-based awards			(1,142)
Payment of debt financing and stock issuance costs and other	(25,475)	(5,753)	(16,405)
Cash Flows from Financing Activities-Continuing Operations	(886,699)	(198,973)	550,678
Cash Flows from Financing Activities-Discontinued Operations	0	0	0
Cash Flows from Financing Activities	(886,699)	(198,973)	550,678
Effect of Exchange Rates on Cash and Cash Equivalents	(4,010)	(8,727)	(24,563)
Increase (decrease) in Cash and Cash Equivalents	11,508	28,070	(760,214)
Cash and cash equivalents, including Restricted Cash, beginning of year	193,555	165,485	925,699
Cash and cash equivalents, including Restricted Cash, end of year	205,063	193,555	165,485
Supplemental Information:
Cash Paid for Interest	390,332	394,984	388,440
Cash Paid for Income Taxes, Net	43,468	61,691	64,493
Non-Cash Investing and Financing Activities:
Financing Leases	55,782	32,742	83,948
Accrued Capital Expenditures	91,528	82,345	84,143
Accrued Purchase Price and Other Holdbacks	0	4,135	35,218
Dividends Payable	$ 187,867	$ 186,021	$ 181,986

CONSOLIDATED STATEMENTS OF CA_2

CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Cash Flows [Abstract]
Deferred financing costs and discount included in Amortization	$ 17,376	$ 16,740	$ 15,675

Nature of Business

Nature of Business	12 Months Ended
	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Business	NATURE OF BUSINESS The accompanying financial statements represent the consolidated accounts of Iron Mountain Incorporated, a Delaware corporation (“IMI”), and its subsidiaries (“we” or “us”). We help organizations around the world protect their information, reduce storage costs, comply with regulations, facilitate corporate disaster recovery, and better use their information and information technology (“IT”) infrastructure for business advantages, regardless of its format, location or life cycle stage. We do this by storing physical records and data backup media, offering information management solutions, and providing data center space for enterprise-class colocation and opportunistic hyperscale deployments. We offer comprehensive records and information management services and data management services, along with the expertise and experience to address complex storage and information management challenges such as rising storage rental costs, legal and regulatory compliance, and disaster recovery requirements. We provide secure and reliable data center facilities to protect digital information and ensure the continued operation of our customers’ IT infrastructure, with reliable and flexible deployment options. In March 2020, the World Health Organization declared a novel strain of coronavirus (“COVID-19”) a pandemic. This resulted in U.S. federal, state and local and foreign governments and private entities mandating various restrictions, including travel restrictions, restrictions on public gatherings and stay-at-home orders and advisories. In response, we temporarily closed certain of our offices and facilities across the world and implemented certain travel restrictions for our employees. The preventative and protective actions that governments have ordered, or we or our customers have implemented, have resulted in a period of reduced service operations and business disruption for us, our customers and other third parties with which we do business. Currently, certain of the restrictions have been lifted; however, other restrictions still remain and the broader impacts of the COVID-19 pandemic on our financial position, results of operations and cash flows, including impacts to the estimates we use in the preparation of our financial statements, remain uncertain and difficult to predict as information continues to evolve, and the severity and duration of the pandemic remains unknown, as is our visibility of its effect on the markets we serve and our customers within those markets. In October 2019, we announced a global program designed to better position us for future growth and achievement of our strategic objectives (“Project Summit”). See Note 2.k. and Note 12. On January 10, 2018, we completed the acquisition of IO Data Centers, LLC (“IODC”). See Note 3. We have been organized and have operated as a real estate investment trust for United States federal income tax purposes (“REIT”) beginning with our taxable year ended December 31, 2014.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIESPRINCIPLES OF CONSOLIDATIONThe accompanying financial statements reflect our financial position, results of operations, comprehensive income (loss), equity and cash flows on a consolidated basis. All intercompany transactions and account balances have been eliminated.USE OF ESTIMATESThe preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires us to make estimates, judgments and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities at the date of the financial statements and for the period then ended. On an ongoing basis, we evaluate the estimates used. We base our estimates on historical experience, actuarial estimates, current conditions and various other assumptions that we believe to be reasonable under the circumstances. These estimates form the basis for making judgments about the carrying values of assets and liabilities and are not readily apparent from other sources. Actual results may differ from these estimates. C. FOREIGN CURRENCY Local currencies are the functional currencies for our operations outside the United States, with the exception of certain foreign holding companies, whose functional currency is the United States dollar. In those instances where the local currency is the functional currency, assets and liabilities are translated at period-end exchange rates, and revenues and expenses are translated at average exchange rates for the applicable period. See Note 2.q. D. CASH, CASH EQUIVALENTS AND RESTRICTED CASH Cash and cash equivalents include cash on hand and cash invested in highly liquid short-term securities, which have remaining maturities at the date of purchase of less than 90 days. Cash and cash equivalents are carried at cost, which approximates fair value. E. ALLOWANCE FOR DOUBTFUL ACCOUNTS AND CREDIT MEMO RESERVES We maintain an allowance for doubtful accounts and a credit memo reserve for estimated losses resulting from the potential inability of our customers to make required payments and potential disputes regarding billing and service issues. In June 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update ("ASU") No. 2016-13, Financial Instruments-Credit Losses-Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”). ASU 2016-13 changes how entities will measure credit losses on most financial assets. The standard eliminates the probable initial recognition of estimated losses and provides a forward-looking expected credit loss model for accounts receivable, loans and other financial instruments. On January 1, 2020 we adopted ASU 2016-13 on a modified retrospective basis for all financial assets measured at amortized cost. The adoption of ASU 2016-13 did not result in a material impact on our consolidated financial statements. Under ASU 2016-13, we calculate and monitor our allowance considering future potential economic and macroeconomic conditions and reasonable and supportable forecasts for expected future collectability of our outstanding receivables, in addition to considering our past loss experience, current and prior trends in our aged receivables and credit memo activity. Our considerations when calculating our allowance include, but are not limited to, the following: the location of our businesses, the composition of our customer base, our product and service lines, potential future economic unrest, and potential future macroeconomic factors, including natural disasters and any impacts associated with the COVID-19 pandemic. Continued adjustments will be made should there be any material change to reasonable and supportable forecasts that may impact our likelihood of collection, as it becomes evident. Our highly diverse global customer base, with no single customer accounting for more than 1% of revenue during the years ended December 31, 2020, 2019 and 2018, limits our exposure to concentration of credit risk. Additionally, we write off uncollectible balances as circumstances warrant, generally, no later than one year past due. Prior to our adoption of ASU 2016-13, we maintained an allowance for doubtful accounts for estimated losses resulting from the potential inability of our customers to make required payments and potential disputes regarding billing and service issues. When calculating the allowance, we considered our past loss experience, current and prior trends in our aged receivables and credit memo activity, current economic conditions, and specific circumstances of individual receivable balances. If the financial condition of our customers were to significantly change, resulting in a significant improvement or impairment of their ability to make payments, an adjustment of the allowance might have been required. Rollforward of allowance for doubtful accounts and credit memo reserves is as follows: YEAR ENDED DECEMBER 31, BALANCE AT BEGINNING OF THE YEAR CREDIT MEMOS CHARGED TO REVENUE ALLOWANCE FOR BAD DEBTS CHARGED TO EXPENSE DEDUCTIONS AND OTHER (1) BALANCE AT 2020 $ 42,856 $ 55,118 $ 34,411 $ (75,404) $ 56,981 2019 43,584 51,846 19,389 (71,963) 42,856 2018 46,648 36,329 18,625 (58,018) 43,584 (1) Primarily consists of the issuance of credit memos, the write-off of accounts receivable and the impact associated with currency translation adjustments. F. CONCENTRATIONS OF CREDIT RISK Financial instruments that potentially subject us to credit risk consist principally of cash and cash equivalents (including money market funds and time deposits) and accounts receivable. The only significant concentrations of liquid investments as of December 31, 2020 and 2019 related to cash and cash equivalents. At December 31, 2020, we had money market funds with four “Triple A” rated money market funds and time deposits with one global bank. At December 31, 2019, we had money market funds with seven “Triple A” rated money market funds. As per our risk management investment policy, we limit exposure to concentration of credit risk by limiting the amount invested in any one mutual fund to a maximum of 1% of the fund's total assets or in any one financial institution to a maximum of $75,000. See Note 2.o. G. PREPAID EXPENSES AND ACCRUED EXPENSES There are no prepaid expenses with items greater than 5% of total current assets as of December 31, 2020 and 2019. Accrued expenses, with items greater than 5% of total current liabilities are shown separately, and consist of the following: DECEMBER 31, DESCRIPTION 2020 2019 Interest $ 131,448 $ 97,987 Sales tax and VAT payable 131,780 115,352 Dividends 187,867 186,021 Operating lease liabilities 250,239 223,249 Other 444,954 339,143 Accrued expenses $ 1,146,288 $ 961,752 H. PROPERTY, PLANT AND EQUIPMENT Property, plant and equipment are stated at cost and depreciated using the straight-line method with the following useful lives (in years): DESCRIPTION RANGE Buildings and building improvements 5 to 40 Leasehold improvements 5 to 10 or life of the lease (whichever is shorter) Racking 1 to 20 or life of the lease (whichever is shorter) Warehouse equipment/vehicles 1 to 10 Furniture and fixtures 1 to 10 Computer hardware and software 2 to 5 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED) Property, plant and equipment (including financing leases in the respective category), at cost, consist of the following: DECEMBER 31, DESCRIPTION 2020 2019 Land $ 354,395 $ 448,566 Buildings and building improvements 3,040,253 3,029,309 Leasehold improvements 969,273 852,022 Racking 2,083,199 2,040,832 Warehouse equipment/vehicles 499,787 483,218 Furniture and fixtures 52,978 54,275 Computer hardware and software 746,993 689,261 Construction in progress 499,459 451,423 Property, plant and equipment $ 8,246,337 $ 8,048,906 Minor maintenance costs are expensed as incurred. Major improvements which extend the life, increase the capacity or improve the safety or the efficiency of property owned are capitalized and depreciated. Major improvements to leased buildings are capitalized as leasehold improvements and depreciated. We capitalize interest expense during the active construction period of major capital projects. Capitalized interest is added to the cost of the underlying assets and is amortized over the useful lives of the assets. During the years ended December 31, 2020, 2019 and 2018, capitalized interest is as follows: YEAR ENDED DECEMBER 31, 2020 2019 2018 Capitalized interest $ 14,321 $ 15,980 $ 3,732 We develop various software applications for internal use. Computer software costs associated with internal use software are expensed as incurred until certain capitalization criteria are met. Third party consulting costs, as well as payroll and related costs for employees directly associated with, and devoting time to, the development of internal use computer software projects (to the extent time is spent directly on the project) are capitalized. Capitalization begins when the design stage of the application has been completed and it is probable that the project will be completed and used to perform the function intended. Capitalization ends when the asset is ready for its intended use. Depreciation begins when the software is placed in service. Computer software costs that are capitalized are periodically evaluated for impairment. During the years ended December 31, 2020, 2019 and 2018, capitalized costs associated with the development of internal use computer software projects are as follows: YEAR ENDED DECEMBER 31, 2020 2019 2018 Capitalized costs associated with the development of internal use computer software projects $ 38,329 $ 34,650 $ 29,407 Entities are required to record the fair value of a liability for an asset retirement obligation in the period in which it is incurred. Asset retirement obligations represent the costs to replace or remove tangible long-lived assets required by law, regulatory rule or contractual agreement. Our asset retirement obligations are primarily the result of requirements under our facility lease agreements which generally have “return to original condition” clauses which would require us to remove or restore items such as shred pits, vaults, demising walls and office build-outs, among others. The significant assumptions used in estimating our aggregate asset retirement obligations are the timing of removals, the probability of a requirement to perform, estimated cost and associated expected inflation rates that are consistent with historical rates and credit-adjusted risk-free rates that approximate our incremental borrowing rate. Our asset retirement obligations at December 31, 2020 and 2019 were $34,537 and $30,831, respectively. I. LEASES We lease facilities for certain warehouses, data centers and office space. We also have land leases, including those on which certain facilities are located. The majority of our leased facilities are classified as operating leases that, on average, have initial lease terms of five one one We account for all leases, both operating and financing, in accordance with ASU No. 2016-02 Leases (Topic 842) , as amended ("ASU 2016-02") which we adopted on January 1, 2019 on a modified retrospective basis. We also adopted an accounting policy which provides that leases with an initial term of 12 months or less will not be included within the lease right-of-use assets and lease liabilities recognized on our Consolidated Balance Sheets after the adoption of ASU 2016-02. We will continue to recognize the lease payments for those leases with an initial term of 12 months or less in our Consolidated Statements of Operations on a straight-line basis over the lease term. The lease right-of-use assets and related lease liabilities are classified as either operating or financing. Lease right-of-use assets are calculated as the net present value of future payments plus any capitalized initial direct costs less any tenant improvements or lease incentives. Lease liabilities are calculated as the net present value of future payments. In calculating the present value of the lease payments, we utilize the rate stated in the lease (in the limited circumstances when such rate is explicitly stated) or, if no rate is explicitly stated, we utilize a rate that reflects our securitized incremental borrowing rate by geography for the lease term. We account for nonlease components (which include common area maintenance, taxes, and insurance) with the related lease component. Any variable nonlease components are not included within the lease right-of-use asset and lease liability on our Consolidated Balance Sheets, and instead, are reflected as an expense in the period incurred. At January 1, 2019, we recognized the cumulative effect of initially applying ASU 2016-02 as an adjustment to the opening balance of (Distributions in excess of earnings) Earnings in excess of distributions, resulting in an increase of approximately $5,800 to stockholders’ equity due to certain build to suit leases that were accounted for as financing leases under Accounting Standards Codification (“ASC”) 840, Leases (“ASC 840”) but are accounted for as operating leases under ASU 2016-02. Operating and financing lease right-of-use assets and lease liabilities as of December 31, 2020 and 2019 are as follows: DECEMBER 31, DESCRIPTION 2020 2019 Assets: Operating lease right-of-use assets (1) $ 2,196,502 $ 1,869,101 Financing lease right-of-use assets, net of accumulated depreciation (2)(3) 310,534 327,215 Liabilities: Current Operating lease liabilities $ 250,239 $ 223,249 Financing lease liabilities (3) 43,149 46,582 Long-term Operating lease liabilities 2,044,598 1,728,686 Financing lease liabilities (3) 323,162 320,600 (1) At December 31, 2020 and 2019, these assets are comprised of approximately 99% real estate related assets (which include land, buildings and racking) and 1% non-real estate related assets (which include warehouse equipment, vehicles, furniture and fixtures and computer hardware and software). (2) At December 31, 2020, these assets are comprised of approximately 72% real estate related assets and 28% non-real estate related assets. At December 31, 2019, these assets are comprised of approximately 69% real estate related assets and 31% non-real estate related assets. (3) 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 Consolidated Balance Sheets. 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED) The components of the lease expense for the years ended December 31, 2020 and 2019 are as follows: YEAR ENDED DECEMBER 31, DESCRIPTION 2020 2019 Operating lease cost (1) $ 499,464 $ 459,619 Financing lease cost: Depreciation of financing lease right-of-use assets $ 51,629 $ 59,258 Interest expense for financing lease liabilities 19,942 21,031 (1) Operating lease cost, the majority of which is included in Cost of sales, includes variable lease costs of $111,501 and $105,922 for the years ended December 31, 2020 and 2019, respectively. Weighted average remaining lease terms and discount rates as of December 31, 2020 and 2019 are as follows: DECEMBER 31, 2020 DECEMBER 31, 2019 OPERATING LEASES FINANCING LEASES OPERATING LEASES FINANCING LEASES Remaining Lease Term 11.1 years 11.5 years 11.0 years 11.6 years Discount Rate 6.9 % 5.9 % 7.1 % 5.7 % The estimated minimum future lease payments as of December 31, 2020, are as follows: YEAR OPERATING LEASES (1) SUBLEASE INCOME FINANCING LEASES (1) 2021 $ 380,607 $ (6,208) $ 62,669 2022 362,970 (5,752) 54,499 2023 334,893 (5,222) 45,557 2024 307,039 (3,771) 38,051 2025 281,487 (1,661) 32,261 Thereafter 1,687,706 (6,229) 268,542 Total minimum lease payments 3,354,702 $ (28,843) 501,579 Less amounts representing interest or imputed interest (1,059,865) (135,268) Present value of lease obligations $ 2,294,837 $ 366,311 (1) Estimated minimum future lease payments exclude variable common area maintenance charges, insurance and taxes. At December 31, 2020, we had seven leases which we have signed but which have not yet commenced and are not included in our lease obligation table above. The total undiscounted minimum lease payments for these leases are approximately $236,200 and have lease terms that range from 10 to 25 years. Each of these leases is expected to commence during 2021, with the exception of one lease where the lease commencement date will be driven by the completion of the building construction, which is expected to occur by the end of 2021 or in early 2022. 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED) Other information: Supplemental cash flow information relating to our leases for the years ended December 31, 2020 and 2019 is as follows: YEAR ENDED DECEMBER 31, CASH PAID FOR AMOUNTS INCLUDED IN MEASUREMENT OF LEASE LIABILITIES: 2020 2019 Operating cash flows used in operating leases $ 360,088 $ 338,059 Operating cash flows used in financing leases (interest) 19,942 21,031 Financing cash flows used in financing leases 47,829 58,033 NON-CASH ITEMS: Operating lease modifications and reassessments $ 143,382 $ 108,023 New operating leases (including acquisitions and sale-leaseback transactions) 370,011 170,464 J. LONG-LIVED ASSETS We review long-lived assets, including all finite-lived intangible assets, for impairment whenever events or changes in circumstances indicate the carrying amount of such assets may not be recoverable. Recoverability of these assets is determined by comparing the sum of the forecasted undiscounted net cash flows of the operation to which the assets relate to their carrying amount. The operations are generally distinguished by the business segment and geographic region in which they operate. If it is determined that we are unable to recover the carrying amount of the assets, the long-lived assets are written down, on a pro rata basis, to fair value. Fair value is determined based on discounted cash flows or appraised values, depending upon the nature of the assets. Long-lived assets, including finite-lived intangible assets, are amortized over their useful lives. Annually, or more frequently if events or circumstances warrant, we assess whether a change in the lives over which long-lived assets, including finite-lived intangible assets, are amortized is necessary. YEAR ENDED DECEMBER 31, 2020 2019 2018 Consolidated gain on disposal/write-down of property, plant and equipment, net $ 363,537 $ 63,824 $ 73,622 The gains primarily consisted of: • Gains associated with sale-leaseback transactions of approximately $342,100, of which (i) approximately $265,600 relates to the sale-leaseback transactions of 14 facilities in the United States during the fourth quarter of 2020 and (ii) approximately $76,400 relates to the sale-leaseback transactions of two facilities in the United States during the third quarter of 2020, each as part of our program to monetize a small portion of our industrial real estate assets. The terms for these leases are consistent with the terms of our lease portfolio, which are disclosed in Note 2.i. • Gains of approximately $24,100 associated with the Frankfurt JV Transaction (as defined in Note 3) • Gains associated with sale and sale-leaseback transactions of approximately $67,800 in the United States • The sale of certain land and buildings of approximately $36,000 in the United Kingdom Partially offset by losses from: • The impairment charge on the assets associated with the select offerings within our Iron Mountain Iron Cloud ("Iron Cloud") portfolio and loss on the subsequent sale of certain IT infrastructure assets and rights to certain hardware and maintenance contracts used to deliver these Iron Cloud offerings of approximately $25,000. • The write-down of certain property, plant and equipment of approximately $15,700 in the United States. • Gain on sale of real estate of approximately $63,800 in the United Kingdom • Gains associated with the involuntary conversion of assets included in a facility that we own in Argentina partially destroyed in a fire in 2014, of approximately $8,800 during the fourth quarter of 2018 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED) K. GOODWILL AND OTHER INDEFINITE-LIVED INTANGIBLE ASSETS Goodwill and intangible assets with indefinite lives are not amortized but are reviewed annually for impairment or more frequently if impairment indicators arise. Other than goodwill, we currently have no intangible assets that have indefinite lives and which are not amortized. We have selected October 1 as our annual goodwill impairment review date. We have performed our annual goodwill impairment review as of October 1, 2020, 2019 and 2018. We concluded that as of October 1, 2020, 2019 and 2018, goodwill was not impaired. During the first quarter of 2020, as discussed in greater detail below, we concluded that we had a triggering event related to our Fine Arts reporting unit, requiring us to perform an interim goodwill impairment test. We concluded that the fair value of our Fine Arts reporting unit was less than its carrying value, and, therefore, we recorded a $23,000 impairment charge on the goodwill associated with this reporting unit during the first quarter of 2020. The following is a discussion regarding (i) the reporting units at which level we tested goodwill for impairment as of October 1, 2019, (ii) changes to the composition of our reporting units between October 1, 2019 and December 31, 2019, (iii) interim goodwill impairment review for our Fine Arts reporting unit during the first quarter of 2020 and (iv) the reporting units at which level we tested goodwill for impairment as of October 1, 2020 and the composition of these reporting units at December 31, 2020 (including the amount of goodwill associated with each reporting unit). When changes occur in the composition of one or more reporting units, the goodwill is reassigned to the reporting units affected based upon their relative fair values. GOODWILL IMPAIRMENT ANALYSIS - 2019 I. REPORTING UNITS AS OF OCTOBER 1, 2019 Our reporting units at which level we performed our goodwill impairment analysis as of October 1, 2019 were as follows: • North American Records and Information Management • North American Data Management • Fine Arts • Entertainment Services • Western Europe • Northern/Eastern Europe and Middle East and India (“NEE and MEI”) • Latin America • Australia, New Zealand and South Africa (“ANZ SA”) • Asia • Global Data Center We concluded that the goodwill associated with each of our reporting units was not impaired as of such date. II. CHANGES TO COMPOSITION OF REPORTING UNITS BETWEEN OCTOBER 1, 2019 AND DECEMBER 31, 2019 During the fourth quarter of 2019, as a result of the realignment of our global managerial structure and changes to our internal financial reporting associated with Project Summit, we reassessed the composition of our reportable operating segments (see Note 10 for a description and definitions of our reporting operating segments) as well as our reporting units. We noted the following changes to our reporting units: • our former North American Records and Information Management (excluding our technology escrow services business) and North American Data Management reporting units are now being managed as our “North America RIM” reporting unit; • our former Western Europe and NEE and MEI reporting units (excluding India) and our business in Africa, which was previously managed as a component of our former ANZ SA reporting unit, is now being managed together as our “Europe RIM” reporting unit; • our business in India, which was previously managed as a component of our former NEE and MEI reporting unit, is now being managed in conjunction with our businesses in Asia as our “Asia RIM” reporting unit; • our former ANZ SA reporting unit will no longer include South Africa and will be referred to as our “Australia and New Zealand RIM” (“ANZ RIM”) reporting unit; and • our technology escrow services business is now being managed separately as our “Technology Escrow Services” reporting unit. 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED) There were no changes to our Global Data Center, Fine Arts, Entertainment Services and Latin America RIM reporting units. We concluded that the goodwill associated with our North America RIM, Europe RIM, ANZ RIM, Asia RIM and Technology Escrow Services reporting units were not impaired following this change in reporting units. GOODWILL BY REPORTING UNIT AS OF DECEMBER 31, 2019 The carrying value of goodwill, net for each of our reporting units described above as of December 31, 2019 is as follows: SEGMENT REPORTING UNIT CARRYING VALUE AS OF DECEMBER 31, 2019 Global RIM (as defined in Note 10) Business North America RIM $ 2,715,550 Europe RIM 572,482 Latin America RIM 140,897 ANZ RIM 274,913 Asia RIM 239,059 Global Data Center Business Global Data Center 424,568 Corporate and Other Business Fine Arts 37,533 Entertainment Services 34,102 Technology Escrow Services 46,105 Total $ 4,485,209 GOODWILL IMPAIRMENT ANALYSIS - 2020 I. INTERIM GOODWILL IMPAIRMENT REVIEW - FINE ARTS During the first quarter of 2020, we concluded that we had a triggering event related to our Fine Arts reporting unit, requiring us to perform an interim goodwill impairment test. The primary factor contributing to our conclusion was the expected impact of the COVID-19 pandemic to this particular business and its customers and revenue sources, which caused us to believe it was more likely than not that the carrying value of our Fine Arts reporting unit exceeded its fair value. During the first quarter of 2020, we performed an interim goodwill impairment test for our Fine Arts reporting unit utilizing a discounted cash flow model, with updated assumptions on future revenues, operating expenditures and capital expenditures. We concluded that the fair value of our Fine Arts reporting unit was less than its carrying value, and, therefore, we recorded a $23,000 impairment charge on the goodwill associated with this reporting unit during the first quarter of 2020. Factors that may impact these assumptions include, but are not limited to: (i) our ability to maintain, or grow, storage and retail service revenues in this reporting unit in line with current expectations and (ii) our ability to manage our fixed and variable costs in this reporting unit in line with potential future revenue declines. II. REPORTING UNITS AS OF OCTOBER 1, 2020 Our reporting units at which level we performed our goodwill impairment analysis as of October 1, 2020 were as follows: • North America RIM • Europe RIM • Latin America RIM • ANZ RIM • Asia RIM • Global Data Center • Fine Arts • Entertainment Services • Technology Escrow Services We concluded that the goodwill associated with each of our reporting units was not impaired as of such date. There were no changes to the composition of our reporting units between October 1, 2020 and December 31, 2020. 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED) GOODWILL BY REPORTING UNIT AS OF DECEMBER 31, 2020 The carrying value of goodwill, net for each of our reporting units described above as of December 31, 2020 is as follows: SEGMENT REPORTING UNIT CARRYING VALUE AS OF DECEMBER 31, 2020 Global RIM Business North America RIM $ 2,719,182 Europe RIM 641,621 Latin America RIM 117,834 ANZ RIM 301,251 Asia RIM 244,294 Global Data Center Business Global Data Center 436,987 Corporate and Other Business Fine Arts 15,176 Entertainment Services 35,159 Technology Escrow Services 46,105 Total $ 4,557,609 Reporting unit valuations have generally been determined using a combined approach based on the present value of future cash flows (the “Discounted Cash Flow Model”) and market multiples (the “Market Approach”). The Discounted Cash Flow Model incorporates significant assumptions including future revenue growth rates, operating margins, discount rates and capital expenditures. The Market Approach requires us to make assumptions related to Adjusted EBITDA (as defined in Note 10) multiples. Changes in economic and operating conditions impacting these assumptions or changes in multiples could result in goodwill impairments in future periods. In conjunction with our annual goodwill impairment reviews, we reconcile the sum of the valuations of all of our reporting units to our market capitalization as of such dates. The changes in the carrying value of goodwill attributable to each reportable operating segment for the years ended December 31, 2020 and 2019 are as follows: GLOBAL RIM GLOBAL DATA CENTER BUSINESS CORPORATE AND OTHER BUSINESS TOTAL CONSOLIDATED Goodwill balance, net of accumulated amortization, as of December 31, 2018 $ 3,899,210 $ 425,956 $ 115,864 $ 4,441,030 Tax deductible goodwill acquired during the year 16,450 — — 16,450 Non-tax deductible goodwill acquired during the year 11,228 — 1,904 13,132 Fair value and other adjustments 4,439 258 (417) 4,280 Currency effects 11,574 (1,646) 389 10,317 Goodwill balance, net of accumulated amortization, as of December 31, 2019 3,942,901 424,568 117,740 4,485,209 Non-tax deductible goodwill acquired during the year 54,258 — — 54,258 Goodwill impairment — — (23,000) (23,000) Fair value and other adjustments (3,815) — 403 (3,412) Currency effects 30,838 12,419 1,297 44,554 Goodwill balance, net of accumulated amortization, as of December 31, 2020 $ 4,024,182 $ 436,987 $ 96,440 $ 4,557,609 Accumulated Goodwill Impairment Balance as of December 31, 2019 $ 132,409 $ — $ 3,011 $ 135,420 Accumulated Goodwill Impairment Balance as of December 31, 2020 $ 132,409 $ — $ 26,011 $ 158,420 L. FINITE-LIVED INTANGIBLE ASSETS AND LIABILITIES I. CUSTOMER RELATIONSHIP INTANGIBLE ASSETS Customer relationship intangible assets, which are acquired through either business combinations or acquisitions of customer relationships, are amortized over periods ranging from 10 to 30 years. Customer relationship intangible assets are recorded based upon estimates of their fair value. II. CUSTOMER INDUCEMENTS Payments that are made to a customer’s current records management vendor in order to terminate the customer’s existing contract with that vendor (“Permanent Withdrawal Fees”), or direct payments to a customer for which no distinct benefit is received in return, are collectively referred to as "Customer Inducements". Customer Inducements are treated as a reduction of the transaction price over periods ranging from one III. DATA CENTER INTANGIBLE ASSETS AND LIABILITIES Finite-lived intangible assets associated with our Global Data Center Business consist of the following: DATA CENTER IN-PLACE LEASE INTANGIBLE ASSETS AND DATA CENTER TENANT RELATIONSHIP INTANGIBLE ASSETS Data Center In-Place Lease Intangible Assets (“Data Center In-Place Leases”) and Data Center Tenant Relationship Intangible Assets (“Data Center Tenant Relationships”) reflect the value associated with acquiring a data center operation with active tenants as of the date of acquisition. The value of Data Center In-Place Leases is determined based upon an estimate of the economic costs (such as lost revenues, tenant improvement costs, commissions, legal expenses and other costs to acquire new data center leases) avoided by acquiring a data center operation with active tenants that would have otherwise been incurred if the data center operation was purchased vacant. Data Center In-Place Leases are amortized over the weighted average remaining term of the acquired data center leases. The value of Data Center Tenant Relationships is determined based upon an estimate of the economic costs avoided upon lease renewal of the acquired tenants, based upon expectations of lease renewal. Data Center Tenant Relationships are amortized over the weighted average remaining anticipated life of the relationship with the acquired tenant. DATA CENTER ABOVE-MARKET AND BELOW-MARKET IN-PLACE LEASE INTANGIBLE ASSETS We record Data Center Above-Market In-Place Lease Intangible Assets (“Data Center Above-Market Leases”) and Data Center Below-Market In-Place Lease Intangible Assets (“Data Center Below-Market Leases”) at the net present value of the difference between (i) the contractual amounts to be paid pursuant to each in-place lease and (ii) management’s estimate of the fair market lease rates for each corresponding in-place lease. Data Center Above-Market Leases and Data Center Below-Market Leases are amortized over the remaining non-canc

Acquisitions and Joint Ventures

Acquisitions and Joint Ventures	12 Months Ended
	Dec. 31, 2020
Business Combinations [Abstract]
Acquisitions and Joint Ventures	ACQUISITIONS AND JOINT VENTURES ACQUISITIONS We account for acquisitions using the acquisition method of accounting, and, accordingly, the assets and liabilities acquired are recorded at their estimated fair values and the results of operations for each acquisition have been included in our consolidated results from their respective acquisition dates. A. ACQUISITIONS COMPLETED DURING THE YEAR ENDED DECEMBER 31, 2020 Prior to January 9, 2020, we owned a 25% equity interest in OSG Records Management (Europe) Limited ("OSG"). On January 9, 2020, we acquired the remaining 75% equity interest in OSG for cash consideration of approximately $95,500 (the "OSG Acquisition"). The OSG Acquisition enabled us to extend our Global RIM Business in Russia, Ukraine, Kazakhstan, Belarus, and Armenia. The results of OSG are fully consolidated within our consolidated financial statements from the closing date of the OSG Acquisition. In connection with the OSG Acquisition, our previously held 25% equity investment in OSG was remeasured to fair value at the closing date of the OSG Acquisition; as a result, we recorded a gain of approximately $10,000 during the first quarter of 2020, which is included as a component of Other expense (income), net on our Consolidated Statements of Operations. The fair value of the 25% equity investment in OSG was determined based on the purchase price of the OSG Acquisition. On February 17, 2020, in order to enhance our existing operations in the United Arab Emirates, we acquired Glenbeigh Records Management DWC-LLC, a storage and records management company, for total cash consideration of approximately $29,100. B. ACQUISITIONS COMPLETED DURING THE YEAR ENDED DECEMBER 31, 2019 During the year ended December 31, 2019, in order to enhance our existing operations in the United States, Colombia, Germany, Hong Kong, Latvia, Slovakia, Switzerland, Thailand and the United Kingdom and to expand our operations into Bulgaria, we completed the acquisition of 10 storage and records management companies and one art storage company for total cash consideration of approximately $51,000. The individual purchase prices of these acquisitions ranged from approximately $700 to $12,500. 3. ACQUISITIONS AND JOINT VENTURES (CONTINUED) C. ACQUISITIONS COMPLETED DURING THE YEAR ENDED DECEMBER 31, 2018 ACQUISITION OF IO DATA CENTERS On January 10, 2018, we completed the acquisition of the United States operations of IODC, a leading data center colocation space and solutions provider based in Phoenix, Arizona, including the land and buildings associated with four data centers in Phoenix and Scottsdale, Arizona; Edison, New Jersey; and Columbus, Ohio (the “IODC Transaction”). At the closing of the IODC Transaction, we paid approximately $1,347,000. In February 2019, we paid approximately $31,000 in additional purchase price associated with the execution of customer contracts from the closing through the one-year anniversary of the IODC Transaction, which, net of amortization, is reported as a third-party commissions asset as a component of Other within Other assets, net in our Consolidated Balance Sheets at December 31, 2020 and 2019. OTHER 2018 NOTEWORTHY ACQUISITIONS On May 25, 2018, in order to further expand our data center operations in Europe, we acquired EvoSwitch Netherlands B.V. and EvoSwitch Global Services B.V., a data center colocation space and solutions provider with a data center in Amsterdam (the “EvoSwitch Transaction”), for (i) cash consideration of 189,000 Euros (or approximately $222,000, based upon the exchange rate between the Euro and the United States dollar on the closing date of the EvoSwitch Transaction) and (ii) $25,000 of additional consideration in the form of future services we will provide to the seller, which is included in purchase price holdbacks and other in the allocation of the purchase price paid table below. On March 8, 2018, in order to expand our data center operations into Europe and Asia, we acquired the operations of two data centers in London and Singapore from Credit Suisse International and Credit Suisse AG (together, “Credit Suisse”) for a total of (i) 34,600 British pounds sterling and (ii) 81,000 Singapore dollars (or collectively, approximately $111,400, based upon the exchange rates between the United States dollar and the British pound sterling and Singapore dollar on the closing date of the Credit Suisse transaction) (the “Credit Suisse Transaction”). As part of the Credit Suisse Transaction, Credit Suisse entered into a long-term lease with us to maintain existing data center operations. In addition to the transactions noted above, during 2018, in order to enhance our existing operations in the United States, Brazil, China, India, Ireland, Philippines, South Korea and the United Kingdom and to expand our operations into Croatia, we completed the acquisition of 11 storage and records management companies and three art storage companies for total consideration of approximately $98,100. The individual purchase prices of these acquisitions ranged from approximately $1,000 to $34,100. 3. ACQUISITIONS AND JOINT VENTURES (CONTINUED) D. PURCHASE PRICE ALLOCATION A summary of the cumulative consideration paid and the allocation of the purchase price paid for all of our acquisitions in each respective year is as follows: 2020 2019 2018 TOTAL TOTAL IODC OTHER FISCAL TOTAL Cash Paid (gross of cash acquired) (1) $ 124,614 $ 53,230 $ 1,347,046 $ 432,078 $ 1,779,124 Purchase Price Holdbacks and Other (2) — 4,135 — 35,218 35,218 Fair Value of Investments Applied to Acquisitions 27,276 — — — — Total Consideration 151,890 57,365 1,347,046 467,296 1,814,342 Fair Value of Identifiable Assets Acquired: Cash 6,545 2,260 34,307 10,227 44,534 Accounts Receivable, Prepaid Expenses and Other Assets 16,559 3,102 7,070 17,662 24,732 Property, Plant and Equipment (3) 52,021 5,396 863,027 225,848 1,088,875 Customer Relationship Intangible Assets (4) 79,065 22,071 — 44,622 44,622 Operating Lease Right-of-Use Assets 100,040 16,956 — — — Data Center In-Place Leases (5) — — 104,340 36,130 140,470 Data Center Tenant Relationships (6) — — 77,362 18,410 95,772 Data Center Above-Market Leases (7) — — 16,439 2,381 18,820 Debt Assumed (27,363) — — (12,312) (12,312) Accounts Payable, Accrued Expenses and Other Liabilities (19,564) (3,233) (36,230) (17,206) (53,436) Operating Lease Liabilities (100,040) (16,956) — — — Deferred Income Taxes (9,631) (1,813) — (43,218) (43,218) Data Center Below-Market Leases (7) — — (11,421) (694) (12,115) Total Fair Value of Identifiable Net Assets Acquired 97,632 27,783 1,054,894 281,850 1,336,744 Goodwill Initially Recorded (8) $ 54,258 $ 29,582 $ 292,152 $ 185,446 $ 477,598 (1) Cash paid for acquisitions, net of cash acquired in our Consolidated Statement of Cash Flows includes contingent and other payments of $512, $7,267 and $23,967 for the years ended December 31, 2020, 2019 and 2018, respectively, related to acquisitions made in the years prior to 2020, 2019 and 2018, respectively. (2) Purchase price holdbacks and other includes $18,824 purchase price accrued for the EvoSwitch Transaction in 2018. (3) Consists primarily of buildings, building improvements, leasehold improvements, data center infrastructure, racking structures, warehouse equipment and computer hardware and software. (4) The weighted average lives of Customer Relationship Intangible Assets associated with acquisitions in 2020, 2019 and 2018 was 14 years, 16 years and 10 years, respectively. (5) The weighted average lives of Data Center In-Place Leases associated with acquisitions in 2018 was six years. (6) The weighted average lives of Data Center Tenant Relationships associated with acquisitions in 2018 was nine years. (7) The weighted average lives of Data Center Above-Market Leases associated with acquisitions in 2018 was three years and the weighted average lives of data center below-market leases associated with acquisitions in 2018 was seven years. (8) The goodwill associated with acquisitions, including IODC, is primarily attributable to the assembled workforce, expanded market opportunities and costs and other operating synergies anticipated upon the integration of the operations of our business and the acquired businesses. 3. ACQUISITIONS AND JOINT VENTURES (CONTINUED) Allocations of the purchase price for acquisitions are based on estimates of the fair value of the net assets acquired and are subject to adjustment upon the finalization of the purchase price allocations. The accounting for business combinations requires estimates and judgments regarding expectations for future cash flows of the acquired business, and the allocations of those cash flows to identifiable tangible and intangible assets, in determining the assets acquired and liabilities assumed. The fair values assigned to tangible and intangible assets acquired and liabilities assumed, including contingent consideration, are based on management’s best estimates and assumptions, as well as other information compiled by management, including valuations that utilize customary valuation procedures and techniques. The estimates and assumptions underlying the initial valuations are subject to the collection of information necessary to complete the valuations within the measurement periods, which are up to one year from the respective acquisition dates. As the valuation of certain assets and liabilities for purposes of purchase price allocations are preliminary in nature, they are subject to adjustment as additional information is obtained about the facts and circumstances regarding these assets and liabilities that existed at the acquisition date. Any adjustments to our estimates of purchase price allocation will be made in the periods in which the adjustments are determined and the cumulative effect of such adjustments will be calculated as if the adjustments had been completed as of the acquisition dates. Adjustments recorded during the fourth quarter of 2020 and year ended December 31, 2020 were not material to our results from operations. JOINT VENTURES A. FRANKFURT DATA CENTER JOINT VENTURE In October 2020, we formed a joint venture (the “Frankfurt JV”) with AGC Equity Partners (“AGC”) to design and develop a 280,000 square foot, 27 megawatt, hyperscale data center currently under development in Frankfurt, Germany (the “Frankfurt JV Transaction”). AGC acquired an 80% equity interest in the Frankfurt JV, while we retained a 20% equity interest (the "Frankfurt JV Investment"). The total cash consideration for the 80% equity interest sold to AGC was approximately $105,000. We received approximately $93,300 (gross of certain transaction expenses) upon the closing of the Frankfurt JV, and we are entitled to receive an additional approximately $11,700 upon the completion of development of the data center, which we expect to occur in the second quarter of 2021. In connection with the Frankfurt JV Transaction, we also entered into agreements whereby we will earn various fees, including property management and construction and development fees, for services we are providing to the Frankfurt JV. As a result of the Frankfurt JV Transaction, we recognized a gain of approximately $24,100, representing the excess of the fair value of the consideration received over the carrying value of the assets, which consisted primarily of land and land development assets which were previously included within our Global Data Center Business segment. We account for our Frankfurt JV Investment as an equity method investment. At the closing date of the Frankfurt JV Transaction, the fair value of the Frankfurt JV Investment was approximately $23,300. The carrying value of our Frankfurt JV Investment at December 31, 2020 was $26,500, which is presented as a component of Other within Other assets, net in our Consolidated Balance Sheet. B. MAKESPACE JOINT VENTURE In March 2019, we formed a joint venture entity (the “MakeSpace JV”) with MakeSpace Labs, Inc., a consumer storage provider (“MakeSpace”). In the second quarter of 2020, we committed to participate in a round of equity funding for the MakeSpace JV whereby we agreed to contribute $36,000 of the $45,000 being raised in installments beginning in May 2020 through October 2021. We account for our investment in the MakeSpace JV as an equity method investment. At December 31, 2020 and 2019, we owned approximately 39% and 34%, respectively, of the outstanding equity in the MakeSpace JV, and the carrying value of our investment in the MakeSpace JV at December 31, 2020 and 2019 was $16,924 and $18,570, respectively, which is presented as a component of Other within Other assets, net in our Consolidated Balance Sheets. See Note 4 for additional detail on the divestment of our consumer storage business that was completed in conjunction with the formation of the MakeSpace JV.

Divestments

Divestments	12 Months Ended
	Dec. 31, 2020
Discontinued Operations and Disposal Groups [Abstract]
Divestments	DIVESTMENTS In March 2019, we contributed our customer contracts and certain intellectual property and other assets used by us to operate our consumer storage business in the United States and Canada (the “IM Consumer Storage Assets”) and approximately $20,000 in cash (gross of certain transaction expenses) (the “Cash Contribution”) to the MakeSpace JV (the "Consumer Storage Transaction"), established by us and MakeSpace. Upon the closing of the Consumer Storage Transaction on March 19, 2019, the MakeSpace JV owned (i) the IM Consumer Storage Assets, (ii) the Cash Contribution and (iii) the customer contracts, intellectual property and certain other assets used by MakeSpace to operate its consumer storage business in the United States. As part of the Consumer Storage Transaction, we received an initial equity interest of approximately 34% in the MakeSpace JV (the "MakeSpace Investment"). In connection with the Consumer Storage Transaction and the investment in the MakeSpace JV, we also entered into a storage and service agreement with the MakeSpace JV to provide certain storage and related services to the MakeSpace JV (see Note 11). We have concluded that the divestment of the IM Consumer Storage Assets in the Consumer Storage Transaction does not meet the criteria to be reported as discontinued operations in our consolidated financial statements, as our decision to divest this business does not represent a strategic shift that will have a major effect on our operations and financial results. Accordingly, the revenues and expenses associated with this business are presented as a component of Income (loss) from continuing operations in our Consolidated Statements of Operations for the year ended December 31, 2019 through the closing date of the Consumer Storage Transaction and for the year ended December 31, 2018 and the cash flows associated with this business are presented as a component of cash flows from continuing operations in our Consolidated Statements of Cash Flows for the year ended December 31, 2019 through the closing date of the Consumer Storage Transaction and for the year ended December 31, 2018. As a result of the Consumer Storage Transaction, we recorded a gain on sale of approximately $4,200 to Other expense (income), net, in the first quarter of 2019, representing the excess of the fair value of the consideration received over the sum of (i) the carrying value of our consumer storage operations and (ii) the Cash Contribution.

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	12 Months Ended
	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities	DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES Derivative instruments we are party to include: (i) interest rate swap agreements (which are designated as cash flow hedges), (ii) cross-currency swap agreements (which are designated as net investment hedges) and (iii) foreign exchange currency forward contracts (which are not designated as hedges). INTEREST RATE SWAP AGREEMENTS DESIGNATED AS CASH FLOW HEDGES In March 2018, we entered into interest rate swap agreements to limit our exposure to changes in interest rates on a portion of our floating rate indebtedness. As of December 31, 2020 and 2019, we had $350,000 in notional value of interest rate swap agreements outstanding, which expire in March 2022. Under the interest rate swap agreements, we receive variable rate interest payments associated with the notional amount of each interest rate swap, based upon one-month LIBOR, in exchange for the payment of fixed interest rates as specified in the interest rate swap agreements. In July 2019, we entered into forward-starting interest rate swap agreements to limit our exposure to changes in interest rates on a portion of our floating rate indebtedness once our current interest rate swap agreements expire in March 2022. The forward-starting interest rate swap agreements have $350,000 in notional value, commence in March 2022 and expire in March 2024. Under the swap agreements, we will receive variable rate interest payments based upon one-month LIBOR, in exchange for the payment of fixed interest rates as specified in the interest rate swap agreements. We have designated these interest rate swap agreements, including the forward-starting interest rate swap agreements, as cash flow hedges. Unrealized gains are recognized as assets, while unrealized losses are recognized as liabilities. 5. DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (CONTINUED) CROSS-CURRENCY SWAP AGREEMENTS DESIGNATED AS A HEDGE OF NET INVESTMENT In August 2019, we entered into cross-currency swap agreements to hedge the variability of exchange rate impacts between the United States dollar and the Euro. Under the terms of the cross-currency swap agreements we notionally exchanged approximately $110,000 at an interest rate of 6.0% for approximately 99,055 Euros at a weighted average interest rate of approximately 3.65%. These cross-currency swap agreements expire in August 2023 (“August 2023 Cross Currency Swap Agreements”). In September 2020, we entered into cross-currency swap agreements to hedge the variability of exchange rates impacts between the United States dollar and the Euro. Under the terms of the cross-currency swap agreements, we notionally exchanged approximately $359,200 at an interest rate of 4.5% for approximately 300,000 Euros at a weighted average interest rate of approximately 3.4%. These cross-currency swap agreements expire in February 2026 (“February 2026 Cross Currency Swap Agreements”). We have designated these cross-currency swap agreements as hedge of net investments against certain of our Euro denominated subsidiaries and they require an exchange of the notional amounts at maturity. These cross-currency swap agreements are marked to market at each reporting period, representing the fair values of the cross-currency swap agreements, and any changes in fair value are recognized as a component of Accumulated other comprehensive items, net. Unrealized gains are recognized as assets while unrealized losses are recognized as liabilities. FOREIGN EXCHANGE CURRENCY FORWARD CONTRACTS NOT DESIGNATED AS HEDGING INSTRUMENTS On occasion, we enter into forward contracts to hedge our exposures associated with certain foreign currencies. We have not designated any of these forward contracts as hedges. Our policy is to record the fair value of each derivative instrument on a gross basis. As of December 31, 2020 and 2019, we had no outstanding forward contracts. (Liabilities) assets recognized in our Consolidated Balance Sheets as of December 31, 2020 and 2019 by derivative instrument are as follows: DERIVATIVE INSTRUMENT (1) DECEMBER 31, 2020 DECEMBER 31, 2019 Cash Flow Hedges (2) Interest Rate Swap Agreements $ (21,062) $ (8,774) Net Investment Hedges (3) August 2023 Cross Currency Swap Agreements (8,229) (982) February 2026 Cross Currency Swap Agreements (20,412) — (1) Our derivative assets are included as a component of Other within Other assets, net and our derivative liabilities are included as a component of Other long-term liabilities in our Consolidated Balance Sheets. (2) As of December 31, 2020, cumulative net losses of $21,062 are recorded within Accumulated other comprehensive items, net associated with these interest rate swap agreements. (3) As of December 31, 2020, cumulative net losses of $28,641 are recorded within Accumulated other comprehensive items, net associated with these cross currency swap agreements. 5. DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (CONTINUED) Losses (gains) recognized during the years ending December 31, 2020, 2019 and 2018, by derivative instrument, are as follows: YEAR ENDED DECEMBER 31, DERIVATIVE INSTRUMENT 2020 2019 2018 Derivative Instruments Designated as Hedging Instruments (1) Cash Flow Hedges Interest Rate Swap Agreements $ 12,288 $ 7,801 $ 973 Net Investment Hedges August 2023 Cross Currency Swap Agreements 7,247 982 — February 2026 Cross Currency Swap Agreements 20,412 — — Derivative Instruments Not Designated as Hedging Instruments (2) Foreign Exchange Currency Forward Contracts — 737 4,954 (1) These amounts are recognized as unrealized losses (gains), a component of Accumulated other comprehensive items, net. (2) These amounts are recognized as foreign exchange losses (gains), a component of Other expense (income), net. Net cash payments (receipts) included in cash from operating activities related to settlements associated with foreign currency forward contracts for the years ended December 31, 2020, 2019 and 2018 are $0, $737 and $5,797, respectively. EURO NOTES DESIGNATED AS A HEDGE OF NET INVESTMENT Prior to their redemption in August 2020, we designated a portion of our Euro Notes as a hedge of net investment of certain of our Euro denominated subsidiaries. From January 1, 2020 through the date of redemption and for the years ended December 31, 2019 and 2018 we designated, on average, 300,000, 284,986 and 224,424 Euros, respectively, of our Euro Notes as a hedge of net investment of certain of our Euro denominated subsidiaries. As a result, we recorded the following foreign exchange losses (gains) related to the change in fair value of such debt due to currency translation adjustments as a component of Accumulated other comprehensive items, net: YEAR ENDED DECEMBER 31, 2020 2019 2018 Foreign exchange losses (gains) associated with net investment hedge $ 17,005 $ 6,003 $ 11,070

Debt

Debt	12 Months Ended
	Dec. 31, 2020
Debt Disclosure [Abstract]
Debt	6. DEBT Long-term debt is as follows: DECEMBER 31, 2020 DECEMBER 31, 2019 DEBT (INCLUSIVE OF DISCOUNT) UNAMORTIZED DEFERRED FINANCING COSTS CARRYING AMOUNT FAIR DEBT (INCLUSIVE OF DISCOUNT) UNAMORTIZED DEFERRED FINANCING COSTS CARRYING AMOUNT FAIR Revolving Credit Facility (1) $ — $ (8,620) $ (8,620) $ — $ 348,808 $ (12,053) $ 336,755 $ 348,808 Term Loan A (1) 215,625 — 215,625 215,625 228,125 — 228,125 228,125 Term Loan B (1)(2) 679,621 (6,244) 673,377 680,750 686,395 (7,493) 678,902 686,890 Australian Dollar Term Loan (the “AUD Term Loan”) (3)(4) 243,152 (1,624) 241,528 244,014 226,924 (2,313) 224,611 228,156 UK Bilateral Revolving Credit Facility (4) 191,101 (1,307) 189,794 191,101 184,601 (1,801) 182,800 184,601 4 3 / 8 % Senior Notes due 2021 (the “4 3 / 8 % Notes”) (5)(6)(7) — — — — 500,000 (2,436) 497,564 503,450 6% Senior Notes due 2023 (the “6% Notes”) (5)(6) — — — — 600,000 (4,027) 595,973 613,500 5 3 / 8 % CAD Senior Notes due 2023 (the “CAD Notes”) (5)(7)(8) — — — — 192,058 (2,071) 189,987 199,380 5 3 / 4 % Senior Subordinated Notes due 2024 (the “5 3 / 4 % Notes”) (5)(6) — — — — 1,000,000 (6,409) 993,591 1,010,625 3% Euro Senior Notes due 2025 (the “Euro Notes”) (5)(6)(7) — — — — 336,468 (3,462) 333,006 345,660 3 7 / 8 % GBP Senior Notes due 2025 (the “GBP Notes “) (5)(7)(9) 546,003 (4,983) 541,020 553,101 527,432 (5,809) 521,623 539,892 5 3 / 8 % Senior Notes due 2026 (the “5 3 / 8 % Notes”) (5)(7)(10) — — — — 250,000 (2,756) 247,244 261,641 4 7 / 8 % Senior Notes due 2027 (the “4 7 / 8 % Notes due 2027”) (5)(6)(7) 1,000,000 (9,598) 990,402 1,046,250 1,000,000 (11,020) 988,980 1,029,475 5 1 / 4 % Senior Notes due 2028 (the “5 1 / 4 % Notes due 2028”) (5)(6)(7) 825,000 (8,561) 816,439 868,313 825,000 (9,742) 815,258 859,598 5% Senior Notes due 2028 (the “5% Notes”) (5)(6)(7) 500,000 (5,486) 494,514 523,125 — — — — 4 7 / 8 % Senior Notes due 2029 (the “4 7 / 8 % Notes due 2029”) (5)(6)(7) 1,000,000 (12,658) 987,342 1,050,000 1,000,000 (14,104) 985,896 1,015,640 5 1 / 4 % Senior Notes due 2030 (the “5 1 / 4 % Notes due 2030”) (5)(6)(7) 1,300,000 (14,416) 1,285,584 1,400,750 — — — — 4 1 / 2 % Senior Notes due 2031 (the “4 1 / 2 % Notes”) (5)(6)(7) 1,100,000 (12,648) 1,087,352 1,138,500 — — — — 5 5 / 8 % Senior Notes due 2032 (the “5 5 / 8 % Notes”) (5)(6)(7) 600,000 (6,727) 593,273 660,000 — — — — Real Estate Mortgages, Financing Lease Liabilities and Other (11) 511,922 (1,086) 510,836 511,922 573,671 (1,388) 572,283 623,671 Accounts Receivable Securitization Program (12) 85,000 (152) 84,848 85,000 272,062 (81) 271,981 272,062 Total Long-term Debt 8,797,424 (94,110) 8,703,314 8,751,544 (86,965) 8,664,579 Less Current Portion (193,759) — (193,759) (389,013) — (389,013) Long-term Debt, Net of Current Portion $ 8,603,665 $ (94,110) $ 8,509,555 $ 8,362,531 $ (86,965) $ 8,275,566 6. DEBT (CONTINUED) (1) The capital stock or other equity interests of most of our United States subsidiaries, and up to 66% of the capital stock or other equity interests of most of our first-tier foreign subsidiaries, are pledged to secure these debt instruments, together with all intercompany obligations (including promissory notes) of subsidiaries owed to us or to one of our United States subsidiary guarantors. In addition, Iron Mountain Canada Operations ULC (“Canada Company”) has pledged 66% of the capital stock of its subsidiaries, and all intercompany obligations (including promissory notes) owed to or held by it, to secure the Canadian dollar subfacility under the Revolving Credit Facility. The fair value (Level 3 of fair value hierarchy described at Note 2.o.) of these debt instruments approximates the carrying value (as borrowings under these debt instruments are based on current variable market interest rates (plus a margin that is subject to change based on our consolidated leverage ratio)), as of December 31, 2020 and 2019. (2) The amount of debt for the Term Loan B (as defined below) reflects an unamortized original issue discount of $1,129 and $1,355 as of December 31, 2020 and 2019, respectively. (3) The amount of debt for the AUD Term Loan reflects an unamortized original issue discount of $862 and $1,232 as of December 31, 2020 and 2019, respectively. (4) The fair value (Level 3 of fair value hierarchy described at Note 2.o.) of this debt instrument approximates the carrying value as borrowings under this debt instrument are based on a current variable market interest rate. (5) The fair values (Level 1 of fair value hierarchy described at Note 2.o.) of these debt instruments are based on quoted market prices for these notes on December 31, 2020 and 2019, respectively. (6) 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 direct and indirect 100% owned United States subsidiaries that represent the substantial majority of our United States operations (the “Guarantors”). These guarantees are joint and several obligations of the Guarantors. The remainder of our subsidiaries do not guarantee the Parent Notes. (7) Collectively, the “Unregistered Notes". The Unregistered Notes have not been registered under the Securities Act of 1933, as amended (the “Securities Act”), or under the securities laws of any other jurisdiction. Unless they are registered, the Unregistered Notes may be offered only in transactions that are exempt from registration under the Securities Act or the securities laws of any other jurisdiction. (8) Canada Company was the direct obligor on the CAD Notes, which were fully and unconditionally guaranteed, on a senior basis, by IMI and the Guarantors. These guarantees were joint and several obligations of IMI and the Guarantors. (9) Iron Mountain (UK) PLC (“IM UK”) is the direct obligor on the GBP Notes, which are fully and unconditionally guaranteed, on a senior basis, by IMI and the Guarantors. These guarantees are joint and several obligations of IMI and the Guarantors. (10) Iron Mountain US Holdings, Inc., one of the Guarantors, was the direct obligor on the 5 3 / 8 % Notes, which were fully and unconditionally guaranteed, on a senior basis, by IMI and the other Guarantors. These guarantees were joint and several obligations of IMI and such Guarantors. (11) We believe the fair value (Level 3 of fair value hierarchy described at Note 2.o.) of this debt approximates its carrying value. This debt includes the following: DECEMBER 31, 2020 DECEMBER 31, 2019 Real estate mortgages (i) $ 71,673 $ 77,036 Financing lease liabilities (ii) 366,311 367,182 Other notes and other obligations (iii) 73,938 129,453 $ 511,922 $ 573,671 (i) Bear interest at approximately 3.3% and 3.9% at December 31, 2020 and 2019, respectively, and includes $50,000 outstanding under our Mortgage Securitization Program at both December 31, 2020 and 2019. (ii) Bear a weighted average interest rate of 5.9% and 5.7% at December 31, 2020 and 2019, respectively. (iii) These notes and other obligations, which were assumed by us as a result of certain acquisitions bear a weighted average interest rate of 10.7% and 10.8% at December 31, 2020 and 2019, respectively. (12) The Accounts Receivable Securitization Special Purpose Subsidiaries are the obligors under this program. We believe the fair value (Level 3 of fair value hierarchy described at Note 2.o.) of this debt approximates its carrying value. 6. DEBT (CONTINUED) A. CREDIT AGREEMENT Our credit agreement (the "Credit Agreement") consists of a revolving credit facility (the “Revolving Credit Facility”) and a term loan (the “Term Loan A”). The Revolving Credit Facility enables IMI and certain of its United States and foreign subsidiaries to borrow in United States dollars and (subject to sublimits) a variety of other currencies (including Canadian dollars, British pounds sterling and Euros, among other currencies) in an aggregate outstanding amount not to exceed $1,750,000. Under the Credit Agreement, we have the option to request additional commitments of up to $1,260,000, in the form of term loans or through increased commitments under the Revolving Credit Facility, subject to the conditions specified in the Credit Agreement. The Credit Agreement is scheduled to mature on June 4, 2023, at which point all obligations become due. The original principal amount of the Term Loan A was $250,000 and is to be paid in quarterly installments in an amount equal to $3,125 per quarter, with the remaining balance due on June 4, 2023. On December 20, 2019, we entered into an amendment to the Credit Agreement. This amendment amended the definition of EBITDA and certain other definitions and restrictive covenants contained in the Credit Agreement. IMI and the Guarantors guarantee all obligations under the Credit Agreement. The interest rate on borrowings under the Credit Agreement varies depending on our choice of interest rate and currency options, plus an applicable margin, which varies based on our consolidated leverage ratio. Additionally, the Credit Agreement requires the payment of a commitment fee on the unused portion of the Revolving Credit Facility, which fee ranges from between 0.25% to 0.4% based on our consolidated leverage ratio and fees associated with outstanding letters of credit. As of December 31, 2020, we had no outstanding borrowings under the Revolving Credit Facility and $215,625 aggregate outstanding principal amount under the Term Loan A. At December 31, 2020, we had various outstanding letters of credit totaling $3,232 under the Revolving Credit Facility. The remaining amount available for borrowing under the Revolving Credit Facility as of December 31, 2020, which is based on IMI’s leverage ratio, the last 12 months' earnings before interest, taxes, depreciation and amortization and rent expense (“EBITDAR”), other adjustments as defined in the Credit Agreement and current external debt, was $1,746,768 (which amount represents the maximum availability as of such date). Available borrowings under the Revolving Credit Facility are subject to compliance with our indenture covenants as discussed below. The average interest rate in effect for all outstanding borrowings under the Credit Agreement was 1.9% and 3.3% as of December 31, 2020 and 2019, respectively. The average interest rate in effect under the Revolving Credit Facility was 3.2% as of December 31, 2019, and the interest rate in effect under the Term Loan A as of December 31, 2020 and 2019 was 1.9% and 3.5%, respectively. IMI’s wholly owned subsidiary, Iron Mountain Information Management, LLC (“IMIM”), has an incremental term loan B with a principal amount of $700,000 (the “Term Loan B”). The Term Loan B, which matures on January 2, 2026, was issued at 99.75% of par. The Term Loan B holders benefit from the same security and guarantees as other borrowings under the Credit Agreement. The Term Loan B holders also benefit from the same affirmative and negative covenants as other borrowings under the Credit Agreement; however, the Term Loan B holders are not generally entitled to the benefits of the financial covenants under the Credit Agreement. Principal payments on the Term Loan B are to be paid in quarterly installments of $1,750 per quarter during the period June 30, 2018 through December 31, 2025, with the balance due on January 2, 2026. The Term Loan B may be prepaid without penalty at any time. The Term Loan B bears interest at a rate of LIBOR plus 1.75%. As of December 31, 2020, we had $679,621 aggregate outstanding principal amount under the Term Loan B. The interest rate in effect under Term Loan B as of December 31, 2020 and 2019 was 1.9% and 3.6%, respectively. REVOLVING CREDIT FACILITY $1,750,000 TERM LOAN A $250,000 TERM LOAN B $700,000 Outstanding borrowings $0 Aggregate outstanding principal amount $215,625 Aggregate outstanding principal amount $679,621 N/A Interest rate 1.9% Interest rate 1.9% Interest rate As of December 31, 2020 As of December 31, 2020 As of December 31, 2020 6. DEBT (CONTINUED) B. NOTES ISSUED UNDER INDENTURES Each series of notes shown below (i) is effectively subordinated to all of our secured indebtedness, including under the Credit Agreement, to the extent of the value of the collateral securing such indebtedness, (ii) ranks pari passu in right of payment with each other and with debt outstanding under the Credit Agreement, the senior notes shown below and other “senior debt” we incur from time to time, and (iii) is structurally subordinated to all liabilities of our subsidiaries that do not guarantee such series of notes. The key terms of our indentures are as follows: SENIOR NOTES AGGREGATE DIRECT MATURITY DATE CONTRACTUAL INTEREST RATE INTEREST PAYMENTS DUE PAR CALL DATE (1) GBP Notes £ 400,000 IM UK November 15, 2025 3 7 / 8 % May 15 and November 15 November 15, 2022 4 7 / 8 % Notes due 2027 $ 1,000,000 IMI September 15, 2027 4 7 / 8 % March 15 and September 15 September 15, 2025 5 1 / 4 % Notes due 2028 $ 825,000 IMI March 15, 2028 5 1 / 4 % March 15 and September 15 March 15, 2025 5% Notes $ 500,000 IMI July 15, 2028 5% January 15 and July 15 July 15, 2025 4 7 / 8 % Notes due 2029 $ 1,000,000 IMI September 15, 2029 4 7 /8 % March 15 and September 15 September 15, 2027 5 1 / 4 % Notes due 2030 $ 1,300,000 IMI July 15, 2030 5 1 /4 % January 15 and July 15 July 15, 2028 4 1 / 2 % Notes $ 1,100,000 IMI February 15, 2031 4 1 / 2 % February 15 and August 15 February 15, 2029 5 5 / 8 % Notes $ 600,000 IMI July 15, 2032 5 5 / 8 % January 15 and July 15 July 15, 2029 (1) We may redeem the notes at any time, at our option, in whole or in part. Prior to the par call date, we may redeem the notes at the redemption price or make-whole premium specified in the applicable indenture, together with accrued and unpaid interest to, but excluding, the redemption date. On or after the par call date, we may redeem the notes at a price equal to 100% of the principal amount being redeemed, together with accrued and unpaid interest to, but excluding, the redemption date. Each of the indentures for the notes provides that we must repurchase, at the option of the holders, the notes at 101% of their principal amount, plus accrued and unpaid interest, upon the occurrence of a “Change of Control,” which is defined in each respective indenture. Except for required repurchases upon the occurrence of a Change of Control or in the event of certain asset sales, each as described in the respective indenture, we are not required to make sinking fund or redemption payments with respect to any of the notes. JUNE 2020 OFFERINGS On June 22, 2020, IMI completed private offerings of the following series of notes in the amounts set forth below (collectively, the "June 2020 Offerings"): SERIES OF NOTES AGGREGATE PRINCIPAL AMOUNT 5% Notes $ 500,000 5 1 / 4 % Notes due 2030 1,300,000 5 5 / 8 % Notes 600,000 The 5% Notes, the 5 1 / 4 % Notes due 2030 and the 5 5 / 8 % Notes were issued at 100.000% of par. The total net proceeds of approximately $2,376,000 from the June 2020 Offerings, after deducting the initial purchasers’ commissions, were used to redeem all of the 4 3 / 8 % Notes, the 6% Notes and the 5 3 / 4 % Notes and to repay a portion of the outstanding borrowings under the Revolving Credit Facility. On June 29, 2020, we redeemed all of the $500,000 in aggregate principal outstanding of the 4 3 / 8 % Notes at 100.000% of par and all of the $600,000 in aggregate principal outstanding of the 6% Notes at 102.000% of par, plus, in each case, accrued and unpaid interest to, but excluding, the redemption date. We recorded a charge of $17,040 to Other expense (income), net during the second quarter of 2020 related to the early extinguishment of this debt, representing the call premium associated with the early redemption of the 6% Notes, as well as a write-off of unamortized deferred financing costs associated with the early redemption of the 4 3 / 8 % Notes and the 6% Notes. 6. DEBT (CONTINUED) On July 2, 2020, we redeemed all of the $1,000,000 in aggregate principal outstanding of the 5 3 / 4 % Notes at 100.958% of par, plus accrued and unpaid interest to, but excluding, the redemption date. We recorded a charge of $15,310 to Other expense (income), net during the third quarter of 2020 related to the early extinguishment of this debt, representing the call premium and write-off of unamortized deferred financing fees. AUGUST 2020 OFFERING On August 18, 2020, IMI completed a private offering of: SERIES OF NOTES AGGREGATE PRINCIPAL AMOUNT 4 1 / 2 % Notes $ 1,100,000 The 4 1 / 2 % Notes were issued at 100.000% of par. The total net proceeds of approximately $1,089,000 from the issuance of the 4 1 / 2 % Notes, after deducting the initial purchasers’ commissions, were used to redeem all of the CAD Notes, the Euro Notes, and the 5 3 / 8 % Notes and to repay a portion of the outstanding borrowings under the Revolving Credit Facility. On August 21, 2020, we redeemed all of the 250,000 CAD in aggregate principal outstanding of the CAD Notes at 104.031% of par, 300,000 Euro in aggregate principal outstanding of the Euro Notes at 101.500% of par and $250,000 in aggregate principal outstanding of the 5 3 / 8 % Notes at 106.628% of par, plus, in each case accrued and unpaid interest to, but excluding, the redemption date. We recorded a charge of $35,950 to Other expense (income), net during the third quarter of 2020 related to the early extinguishment of the CAD Notes, the Euro Notes and the 5 3 / 8 % Notes, representing the call premiums and write off unamortized deferred financing costs associated with the early redemption of these debt instruments. C. AUSTRALIAN DOLLAR TERM LOAN Iron Mountain Australia Group Pty, Ltd. (“IM Australia”), a wholly owned subsidiary of IMI, has an AUD term loan with an original principal balance of 350,000 Australian dollars (“AUD Term Loan”). All indebtedness associated with the AUD Term Loan was issued at 99% of par. Principal payments on the AUD Term Loan are to be paid in quarterly installments in an aggregate amount of 8,750 Australian dollars per year. The AUD Term Loan bears interest at BBSY (an Australian benchmark variable interest rate) plus 3.875%. The AUD Term Loan is scheduled to mature on September 22, 2022, at which point all obligations become due. As of December 31, 2020, we had 316,563 Australian dollars ($244,014 based upon the exchange rate between the United States dollar and the Australian dollar as of December 31, 2020) outstanding on the AUD Term Loan. As of December 31, 2019, we had 325,313 Australian dollars ($228,156 based upon the exchange rate between the United States dollar and the Australian dollar as of December 31, 2019) outstanding on the AUD Term Loan. The interest rate in effect under the AUD Term Loan was 3.9% and 4.8% as of December 31, 2020 and 2019, respectively. OUTSTANDING BORROWINGS AU$244,014 3.9% Interest Rate As of December 31, 2020 6. DEBT (CONTINUED) D. UK BILATERAL REVOLVING CREDIT FACILITY IM UK and Iron Mountain (UK) Data Centre Limited has a 140,000 British pounds sterling Revolving Credit Facility (the “UK Bilateral Facility”) with Barclays Bank PLC. The maximum amount permitted to be borrowed under the UK Bilateral Facility is 140,000 British pounds sterling, and we have the option to request additional commitments of up to 125,000 British pounds sterling, subject to the conditions specified in the UK Bilateral Facility. The UK Bilateral Facility is fully drawn. The UK Bilateral Facility is secured by certain properties in the United Kingdom. IMI and the Guarantors guarantee all obligations under the UK Bilateral Facility. The UK Bilateral Facility is scheduled to mature on September 23, 2022, at which point all obligations become due. The UK Bilateral Facility contains an option to extend the maturity date for an additional year, subject to the conditions specified in the UK Bilateral Facility, including the lender’s consent. The UK Bilateral Facility bears interest at a rate of LIBOR plus 2.25%. The interest rate in effect under the UK Bilateral Facility was 2.3% and 3.1% as of December 31, 2020 and 2019, respectively. MAXIMUM AMOUNT £140,000 OPTIONAL ADDITIONAL COMMITMENTS £125,000 2.3% Interest Rate As of December 31, 2020 E. ACCOUNTS RECEIVABLE SECURITIZATION PROGRAM We participate in an accounts receivable securitization program (the “Accounts Receivable Securitization Program”) involving several of our wholly owned subsidiaries and certain financial institutions. Under the Accounts Receivable Securitization Program, certain of our subsidiaries sell substantially all of their United States accounts receivable balances to our wholly owned special purpose entities, Iron Mountain Receivables QRS, LLC and Iron Mountain Receivables TRS, LLC (the “Accounts Receivable Securitization Special Purpose Subsidiaries”). The Accounts Receivable Securitization Special Purpose Subsidiaries use the accounts receivable balances to collateralize loans obtained from certain financial institutions. The Accounts Receivable Securitization Special Purpose Subsidiaries are consolidated subsidiaries of IMI. The Accounts Receivable Securitization Program is accounted for as a collateralized financing activity, rather than a sale of assets, and therefore: (i) accounts receivable balances pledged as collateral are presented as assets and borrowings are presented as liabilities on our Consolidated Balance Sheets, (ii) our Consolidated Statements of Operations reflect the associated charges for bad debt expense related to pledged accounts receivable (a component of selling, general and administrative expenses) and reductions to revenue due to billing and service related credit memos issued to customers and related reserves, as well as interest expense associated with the collateralized borrowings and (iii) receipts from customers related to the underlying accounts receivable are reflected as operating cash flows and borrowings and repayments under the collateralized loans are reflected as financing cash flows within our Consolidated Statements of Cash Flows. IMIM retains the responsibility of servicing the accounts receivable balances pledged as collateral for the Accounts Receivable Securitization Program and IMI provides a performance guaranty. The maximum availability allowed is limited by eligible accounts receivable, as defined under the terms of the Accounts Receivable Securitization Program. On March 31, 2020, we amended the Accounts Receivable Securitization Program to (i) increase the maximum amount available from $275,000 to $300,000 and (ii) extend the maturity date from July 30, 2020 to July 30, 2021, at which point all obligations become due. The full amount outstanding under the Accounts Receivable Securitization Program is classified within the current portion of long-term debt in our Consolidated Balance Sheet as of December 31, 2020 and 2019. As of December 31, 2020, the maximum availability allowed and amount outstanding under the Accounts Receivable Securitization Program was $274,100 and $85,000, respectively. At December 31, 2019, both the maximum availability and amount outstanding under the Accounts Receivable Securitization Program was $272,062. The interest rate in effect under the Accounts Receivable Securitization Program was 1.1% and 2.8% as of December 31, 2020 and 2019, respectively. Commitment fees at a rate of 40 basis points are charged on amounts made available but not borrowed under the Accounts Receivable Securitization Program. MAXIMUM AMOUNT $300,000 MAXIMUM AVAILABILITY ALLOWED $274,100 OUTSTANDING BORROWINGS $85,000 1.1% Interest rate As of December 31, 2020 6. DEBT (CONTINUED) F. CASH POOLING Certain of our subsidiaries participate in cash pooling arrangements (the “Cash Pools”) with Bank Mendes Gans (“BMG”), an independently operated wholly owned subsidiary of ING Group, in order to help manage global liquidity requirements. Under the Cash Pools, cash deposited by participating subsidiaries with BMG is pledged as security against the debit balances of other participating subsidiaries, and legal rights of offset are provided and, therefore, amounts are presented in our Consolidated Balance Sheets on a net basis. Each subsidiary receives interest on the cash balances held on deposit or pays interest on its debit balances based on an applicable rate as defined in the Cash Pools. We currently utilize two separate Cash Pools with BMG, one of which we utilize to manage global liquidity requirements for our qualified REIT subsidiaries (the “QRS Cash Pool”) and the other for our taxable REIT subsidiaries (the “TRS Cash Pool”). We have executed overdraft facility agreements for the QRS Cash Pool and TRS Cash Pool, each in an amount not to exceed $10,000. Each overdraft facility permits us to cover a temporary net debit position in the applicable pool. The approximate amount of the net cash position, gross position and outstanding debit balances for the QRS Cash Pool and TRS Cash Pool as of December 31, 2020 and 2019 were as follows: DECEMBER 31, 2020 DECEMBER 31, 2019 GROSS CASH POSITION OUTSTANDING DEBIT BALANCES NET CASH POSITION GROSS CASH POSITION OUTSTANDING DEBIT BALANCES NET CASH POSITION QRS Cash Pool $ 448,700 $ (447,400) $ 1,300 $ 372,100 $ (369,000) $ 3,100 TRS Cash Pool 555,500 (553,500) 2,000 319,800 (301,300) 18,500 The net cash position balances as of December 31, 2020 and 2019 are reflected as Cash and cash equivalents in our Consolidated Balance Sheets. G. LETTERS OF CREDIT As of December 31, 2020, we had outstanding letters of credit totaling $36,160, of which $3,232 reduce our borrowing capacity under the Revolving Credit Facility (as described above). The letters of credit expire at various dates between January 2021 and January 2033. H. 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 certain other 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 fixed charge coverage ratio, a net total lease adjusted leverage ratio and a net secured debt lease adjusted leverage 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 EBITDAR-based calculations and the bond indentures use EBITDA-based calculations as the primary measures of financial performance for purposes of calculating leverage and fixed charge coverage ratios. The bond indenture EBITDA-based calculations include our consolidated subsidiaries, other than those we have designated as “Unrestricted Subsidiaries” as defined in the 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 December 31, 2020 and 2019. Noncompliance with these leverage and fixed charge coverage ratios would have a material adverse effect on our financial condition. 6. DEBT (CONTINUED) I. MATURITIES OF LONG-TERM DEBT (GROSS OF DISCOUNTS) ARE AS FOLLOWS : YEAR AMOUNT 2021 $ 193,759 2022 536,811 2023 232,264 2024 45,680 2025 569,005 Thereafter 7,221,896 8,799,415 Net Discounts (1,991) Net Deferred Financing Costs (94,110) Total Long-term Debt (including current portion) $ 8,703,314

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES A. PURCHASE COMMITMENTS We have certain contractual obligations related to purchase commitments which require minimum payments as follows: YEAR PURCHASE COMMITMENTS (1) 2021 $ 189,855 2022 45,339 2023 31,507 2024 28,269 2025 25,554 Thereafter 322 $ 320,846 (1) Purchase commitments (i) include obligations for future construction costs associated with the expansion of our Global Data Center Business, which represent a significant amount of the purchase commitments due in 2021 and (ii) exclude our operating and financing lease obligations (see Note 2.i.). B. SELF-INSURED LIABILITIES We are self-insured up to certain limits for costs associated with workers’ compensation claims, vehicle accidents, property and general business liabilities, and benefits paid under employee healthcare and short-term disability programs. At December 31, 2020 and 2019, there were $47,959 and $43,127, respectively, of self-insurance accruals reflected in Accrued expenses on our Consolidated Balance Sheets. The measurement of these costs requires the consideration of historical cost experience and judgments about the present and expected levels of cost per claim. We account for these costs primarily through actuarial methods, which develop estimates of the undiscounted liability for claims incurred, including those claims incurred but not reported. These methods provide estimates of future claim costs based on claims incurred as of the balance sheet date. 7. COMMITMENTS AND CONTINGENCIES (CONTINUED) C. LITIGATION—GENERAL We are involved in litigation from time to time in the ordinary course of business, including litigation arising from damage to customer assets in our facilities caused by fires and other natural disasters. A portion of the defense and/or settlement costs associated with such litigation is covered by various commercial liability insurance policies purchased by us and, in limited cases, indemnification from third parties. Our policy is to establish reserves for loss contingencies when the losses are both probable and reasonably estimable. We record legal costs associated with loss contingencies as expenses in the period in which they are incurred. While the outcome of litigation is inherently uncertain, we do not believe any current litigation will have a material adverse effect on our consolidated financial condition, results of operations or cash flows.

Stockholders' Equity Matters

Stockholders' Equity Matters	12 Months Ended
	Dec. 31, 2020
Equity [Abstract]
Stockholders' Equity Matters	STOCKHOLDERS’ EQUITY MATTERS Our board of directors has adopted a dividend policy under which we have paid, and in the future intend to pay, quarterly cash dividends on our common stock. The amount and timing of future dividends will continue to be subject to the approval of our board of directors, in its sole discretion, and to applicable legal requirements. In 2018, 2019 and 2020, our board of directors declared the following dividends: DECLARATION DATE DIVIDEND RECORD DATE TOTAL AMOUNT PAYMENT DATE February 14, 2018 $ 0.5875 March 15, 2018 $ 167,969 April 2, 2018 May 24, 2018 0.5875 June 15, 2018 168,078 July 2, 2018 July 24, 2018 0.5875 September 17, 2018 168,148 October 2, 2018 October 25, 2018 0.6110 December 17, 2018 174,935 January 3, 2019 February 7, 2019 0.6110 March 15, 2019 175,242 April 2, 2019 May 22, 2019 0.6110 June 17, 2019 175,389 July 2, 2019 July 26, 2019 0.6110 September 16, 2019 175,434 October 2, 2019 October 31, 2019 0.6185 December 16, 2019 177,687 January 2, 2020 February 13, 2020 0.6185 March 16, 2020 178,047 April 6, 2020 May 5, 2020 0.6185 June 15, 2020 178,212 July 2, 2020 August 5, 2020 0.6185 September 15, 2020 178,224 October 2, 2020 November 4, 2020 0.6185 December 15, 2020 178,290 January 6, 2021 On February 24, 2021, we declared a dividend to our stockholders of record as of March 15, 2021 of $0.6185 per share, payable on April 6, 2021. During the years ended December 31, 2020, 2019 and 2018, we declared dividends in an aggregate and per share amount, based on the weighted average number of common shares outstanding during each respective year, as follows: YEAR ENDED DECEMBER 31, 2020 2019 2018 Declared distributions $ 712,773 $ 703,752 $ 679,130 Amount per share each distribution represents based on weighted average number of common shares outstanding 2.47 2.45 2.38 8. STOCKHOLDERS’ EQUITY MATTERS (CONTINUED) For federal income tax purposes, distributions to our stockholders are generally treated as nonqualified ordinary dividends (potentially eligible for the lower effective tax rates available for “qualified REIT dividends”), qualified ordinary dividends or return of capital. The United States Internal Revenue Service requires historical C corporation earnings and profits to be distributed prior to any REIT distributions, which may affect the character of each distribution to our stockholders, including whether and to what extent each distribution is characterized as a qualified or nonqualified ordinary dividend. In addition, certain of our distributions qualify as capital gain distributions. For the years ended December 31, 2020, 2019, and 2018, the dividends we paid on our common shares were classified as follows: YEAR ENDED DECEMBER 31, 2020 2019 2018 Nonqualified ordinary dividends 43.0 % 54.8 % 83.0 % Qualified ordinary dividends — % 4.5 % 4.8 % Capital gains 49.5 % 14.7 % 5.8 % Return of capital 7.5 % 26.0 % 6.4 % 100.0 % 100.0 % 100.0 % Dividends paid during the years ended December 31, 2020, 2019, and 2018 which were classified as qualified ordinary dividends for federal income tax purposes primarily related to the distribution of historical C corporation earnings and profits related to certain acquisitions completed during the years ended December 31, 2020, 2019, and 2018 . In 2020, the percentage of our dividend that was classified as a capital gain was 49.5% and primarily related to the sale of land and buildings in the United States. In 2019, the percentage of our dividend that was classified as a capital gain was 14.7% and primarily related to the sale of land and buildings in the United States and United Kingdom. In 2018, the percentage of our dividend that was classified as a capital gain was 5.8% and primarily related to the sale of land and buildings in the United Kingdom . EQUITY OFFERING In December 2017, we entered into an underwriting agreement (the “Underwriting Agreement”) with a syndicate of 16 banks (the “Underwriters”) related to the public offering by us of 14,500,000 shares of our common stock. In January 2018, the Underwriters, pursuant to the Underwriting Agreement, exercised an option to purchase an additional 2,175,000 shares of common stock, which after deducting underwriters’ commissions and the per share value of the dividend we declared on our common stock on October 24, 2017, resulted in net proceeds of approximately $76,200.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES We have been organized and have operated as a REIT effective beginning with our taxable year that ended on December 31, 2014. As a REIT, we are generally permitted to deduct from our federal taxable income the dividends we pay to our stockholders. The income represented by such dividends is not subject to federal taxation at the entity level but is taxed, if at all, at the stockholder level. The income of our domestic taxable REIT subsidiaries (“TRSs”), which hold our domestic operations that may not be REIT-compliant as currently operated and structured, is subject, as applicable, to federal and state corporate income tax. In addition, we and our subsidiaries continue to be subject to foreign income taxes in other jurisdictions in which we have business operations or a taxable presence, regardless of whether assets are held or operations are conducted through subsidiaries disregarded for federal income tax purposes or TRSs. We will also be subject to a separate corporate income tax on any gains recognized on the sale or disposition of any asset previously owned by a C corporation during a five-year period after the date we first owned the asset as a REIT asset that are attributable to “built-in gains” with respect to that asset on that date. We will also be subject to a built-in gains tax on our depreciation recapture recognized into income as a result of accounting method changes in connection with our acquisition activities. If we fail to remain qualified for taxation as a REIT, we will be subject to federal income tax at regular corporate income tax rates. Even if we remain qualified for taxation as a REIT, we may be subject to some federal, state, local and foreign taxes on our income and property in addition to taxes owed with respect to our TRS operations. In particular, while state income tax regimes often parallel the federal income tax regime for REITs, many states do not completely follow federal rules and some do not follow them at all. The significant components of our deferred tax assets and deferred tax liabilities as of December 31, 2020 and 2019 are presented below: DECEMBER 31, 2020 2019 Deferred Tax Assets: Accrued liabilities and other adjustments $ 52,527 $ 53,197 Net operating loss carryforwards 96,710 99,240 Federal benefit of unrecognized tax benefits — 3,039 Valuation allowance (46,938) (60,003) 102,299 95,473 Deferred Tax Liabilities: Other assets, principally due to differences in amortization (186,682) (177,645) Plant and equipment, principally due to differences in depreciation (59,711) (67,515) Other (29,265) (21,903) (275,658) (267,063) Net deferred tax liability $ (173,359) $ (171,590) The deferred tax assets and deferred tax liabilities as of December 31, 2020 and 2019 are presented below: DECEMBER 31, 2020 2019 Noncurrent deferred tax assets (Included in Other, a component of Other assets, net) $ 25,018 $ 16,538 Deferred income taxes (198,377) (188,128) At December 31, 2020, we have federal and state net operating loss carryforwards of which we are expecting an insignificant tax benefit to be realized. We have assets for foreign net operating losses of $92,142, with various expiration dates (and in some cases no expiration date), subject to a valuation allowance of approximately 43%. 9. INCOME TAXES (CONTINUED) Rollforward of the valuation allowance is as follows: YEAR ENDED DECEMBER 31, BALANCE AT BEGINNING OF CHARGED OTHER INCREASES/ (DECREASES) (1) BALANCE 2020 $ 60,003 $ (8,337) $ (4,728) $ 46,938 2019 55,666 6,211 (1,874) 60,003 2018 61,756 3,568 (9,658) 55,666 (1) Other increases and decreases in valuation allowances are primarily related to changes in foreign currency exchange rates. The components of income (loss) from continuing operations before provision (benefit) for income taxes for the years ended December 31, 2020, 2019 and 2018 are as follows: YEAR ENDED DECEMBER 31, 2020 2019 2018 United States $ 276,145 $ 203,225 $ 203,078 Canada 52,332 48,326 53,779 Other Foreign 44,228 76,591 153,454 $ 372,705 $ 328,142 $ 410,311 The provision (benefit) for income taxes for the years ended December 31, 2020, 2019 and 2018 consist of the following components: YEAR ENDED DECEMBER 31, 2020 2019 2018 Federal—current $ (10,424) $ 7,262 $ 703 Federal—deferred 8,834 (3,356) (4,162) State—current 2,956 3,943 918 State—deferred (625) (1,126) 627 Foreign—current 50,063 49,350 45,371 Foreign—deferred (21,195) 3,858 (704) Provision (Benefit) for Income Taxes $ 29,609 $ 59,931 $ 42,753 9. INCOME TAXES (CONTINUED) A reconciliation of total income tax expense and the amount computed by applying the current federal statutory tax rate of 21.0% to income (loss) from continuing operations before provision (benefit) for income taxes for the years ended December 31, 2020, 2019 and 2018, respectively, is as follows: YEAR ENDED DECEMBER 31, 2020 2019 2018 Computed "expected” tax provision $ 78,268 $ 68,910 $ 86,165 Changes in income taxes resulting from: Tax adjustment relating to REIT (60,378) (40,577) (35,165) State taxes (net of federal tax benefit) 2,258 2,115 1,599 (Decrease) increase in valuation allowance (net operating losses) (8,337) 6,211 3,568 (Reversal) reserve accrual and audit settlements (net of federal tax benefit) (7,409) 514 (13,985) Foreign tax rate differential 9,472 8,562 1,031 Disallowed foreign interest, Subpart F income, and other foreign taxes 20,242 14,241 903 Other, net (4,507) (45) (1,363) Provision (Benefit) for Income Taxes $ 29,609 $ 59,931 $ 42,753 Our effective tax rates for the years ended December 31, 2020, 2019 and 2018 were 7.9%, 18.3% and 10.4%, respectively. Our effective tax rate is subject to variability in the future due to, among other items: (1) changes in the mix of income between our qualified REIT subsidiaries (“QRSs”) and our TRSs, as well as among the jurisdictions in which we operate; (2) tax law changes; (3) volatility in foreign exchange gains and losses; (4) the timing of the establishment and reversal of tax reserves; and (5) our ability to utilize net operating losses that we generate. The primary reconciling items between the federal statutory tax rate of 21.0% and our overall effective tax rate were: YEAR ENDED DECEMBER 31, 2020 2019 2018 The benefit derived from the dividends paid deduction of $60,378 and the impact of differences in the tax rates at which our foreign earnings are subject to, resulting in a tax provision of $9,472. The benefit derived from the dividends paid deduction of $40,577 and the impact of differences in the tax rates at which our foreign earnings are subject to, resulting in a tax provision of $8,562. The benefit derived from the dividends paid deduction of $35,165, the impact of differences in the tax rates at which our foreign earnings are subject to, resulting in a tax provision of $1,031 and a discrete tax benefit of approximately $14,000 associated with the resolution of a tax matter (which was included as a component of Accrued expenses in our Consolidated Balance Sheet as of December 31, 2017). As a REIT, we are entitled to a deduction for dividends paid, resulting in a substantial reduction of federal income tax expense. As a REIT, substantially all of our income tax expense will be incurred based on the earnings generated by our foreign subsidiaries and our domestic TRSs. 9. INCOME TAXES (CONTINUED) Following our conversion to a REIT in 2014, we concluded that it was not our intent to reinvest our current and future undistributed earnings of our foreign subsidiaries indefinitely outside the United States. As of December 31, 2016, we concluded that it is our intent to indefinitely reinvest our current and future undistributed earnings of certain of our unconverted foreign TRSs outside the United States. With the exception of certain limited instances, we no longer provide incremental foreign withholding taxes on the retained book earnings of these unconverted foreign TRSs, which was approximately $262,379 as of December 31, 2020. As a REIT, future repatriation of incremental undistributed earnings of our foreign subsidiaries will not be subject to federal or state income tax, with the exception of foreign withholding taxes in limited instances; however, such future repatriations will require distribution in accordance with REIT distribution rules, and any such distribution may then be taxable, as appropriate, at the stockholder level. We continue, however, to provide for incremental foreign withholding taxes on net book over outside basis differences related to the earnings of our foreign QRSs and certain other foreign TRSs (excluding unconverted foreign TRSs). The evaluation of an uncertain tax position is a two-step process. The first step is a recognition process whereby we determine whether it is more likely than not that a tax position will be sustained upon examination, including resolution of any related appeals or litigation processes, based on the technical merits of the position. The second step is a measurement process whereby a tax position that meets the more likely than not recognition threshold is calculated to determine the amount of benefit to recognize in the financial statements. The tax position is measured as the largest amount of benefit that is greater than 50% likely of being realized upon ultimate settlement. We have elected to recognize interest and penalties associated with uncertain tax positions as a component of the provision (benefit) for income taxes in the accompanying Consolidated Statements of Operations. We recorded a decrease of $1,499 for gross interest and penalties for the year ended December 31, 2020. We recorded an increase of $1,780 and $1,961 for gross interest and penalties for the years ended December 31, 2019 and 2018, respectively. We had $6,212 and $9,282 accrued for the payment of interest and penalties as of December 31, 2020 and 2019, respectively. A summary of tax years that remain subject to examination by major tax jurisdictions is as follows: TAX YEARS TAX JURISDICTION See Below United States—Federal and State 2017 to present United Kingdom 2014 to present Canada The normal statute of limitations for United States federal tax purposes is three years from the date the tax return is filed; however, the statute of limitations may remain open for periods longer than three years in instances where a federal tax examination is in progress. The 2019, 2018 and 2017 tax years remain subject to examination for United States federal tax purposes as well as net operating loss carryforwards utilized in these years. We utilized net operating losses from 2002 through 2003 and 2010 through 2015 in our federal income tax returns for these tax years. The normal statute of limitations for state purposes is between three to five years. However, certain of our state statute of limitations remain open for periods longer than this when audits are in progress. We are subject to income taxes in the United States and numerous foreign jurisdictions. We are subject to examination by various tax authorities in jurisdictions in which we have business operations or a taxable presence. We regularly assess the likelihood of additional assessments by tax authorities and provide for these matters as appropriate. As of December 31, 2020, we had $25,969 of reserves related to uncertain tax positions, of which $23,402 and $2,567 is included in other long-term liabilities and deferred income taxes, respectively, in the accompanying Consolidated Balance Sheet. As of December 31, 2019, we had $35,068 of reserves related to uncertain tax positions, of which $31,992 and $3,076 is included in other long-term liabilities and deferred income taxes, respectively, in the accompanying Consolidated Balance Sheet. Although we believe our tax estimates are appropriate, the final determination of tax audits and any related litigation could result in changes in our estimates. 9. INCOME TAXES (CONTINUED) A rollforward of unrecognized tax benefits is as follows: Gross tax contingencies—December 31, 2017 $ 38,533 Gross additions based on tax positions related to the current year 3,147 Gross additions for tax positions of prior years 981 Gross reductions for tax positions of prior years (2,865) Lapses of statutes (4,462) Settlements (14) Gross tax contingencies—December 31, 2018 35,320 Gross additions based on tax positions related to the current year 2,914 Gross additions for tax positions of prior years 1,271 Gross reductions for tax positions of prior years (299) Lapses of statutes (4,034) Settlements (104) Gross tax contingencies—December 31, 2019 35,068 Gross additions based on tax positions related to the current year 2,907 Gross additions for tax positions of prior years 80 Gross reductions for tax positions of prior years (5,617) Lapses of statutes (4,480) Settlements (1,989) Gross tax contingencies—December 31, 2020 $ 25,969

Segment Information

Segment Information	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
Segment Information	SEGMENT INFORMATION As of December 31, 2020, our three reportable operating segments are described as follows: (1) Global Records and Information Management (“Global RIM”) Business includes five distinct offerings: (i) Records Management, which stores physical records and provides healthcare information services, vital records services, courier operations, and the collection, handling and disposal of sensitive documents (collectively, “Records Management”) for customers in 56 countries around the globe. (ii) Data Management, which provides storage and rotation of backup computer media as part of corporate disaster recovery plans, including service and courier operations (“Data Protection & Recovery”); server and computer backup services; and related services offerings, (collectively, “Data Management”). (iii) Global Digital Solutions, which develops, implements and supports comprehensive storage and information management solutions for the complete lifecycle of our customers’ information, including the management of physical records, conversion of documents to digital formats and digital storage of information, primarily in the United States and Canada. (iv) Secure Shredding, which includes the scheduled pick-up of office records that customers accumulate in specially designed secure containers we provide and is a natural extension of our hardcopy records management operations, completing the lifecycle of a record. Complementary to our shredding operations is the sale of the resultant waste paper to third-party recyclers. Through a combination of shredding facilities and mobile shredding units consisting of custom built trucks, we are able to offer secure shredding services to our customers throughout the United States, Canada and South Africa. (v) Consumer Storage, which provides on-demand, valet storage for consumers (“Consumer Storage”) across 31 markets in North America through the MakeSpace JV. The MakeSpace JV utilizes data analytics and machine learning to provide effective customer acquisition and a convenient and seamless consumer storage experience. (2) Global Data Center Business, which provides enterprise-class data center facilities and hyperscale-ready capacity to protect mission-critical assets and ensure the continued operation of our customers’ IT infrastructure, with secure, reliable and flexible data center options. As of December 31, 2020, our Global Data Center Business footprint spans nine markets in the United States and four international markets. UNITED STATES INTERNATIONAL MARKETS Denver, Colorado Amsterdam Kansas City, Missouri London Boston, Massachusetts Singapore Boyers, Pennsylvania Frankfurt (through an unconsolidated joint venture) Manassas, Virginia Edison, New Jersey Columbus, Ohio Phoenix and Scottsdale, Arizona (3) Corporate and Other Business, which consists primarily of Adjacent Businesses and other corporate items. Our Adjacent Businesses is comprised of: (i) entertainment and media which helps industry clients store, safeguard and deliver physical media of all types, and provides digital content repository systems that house, distribute, and archive key media assets, throughout the United States, Canada, France, China - Hong Kong S.A.R., the Netherlands and the United Kingdom (“Entertainment Services”) and (ii) technical expertise in the handling, installation and storing of art in the United States, Canada and Europe (“Fine Arts”). Our Corporate and Other Business segment also includes costs related to executive and staff functions, including finance, human resources and IT, which benefit the enterprise as a whole. 10. SEGMENT INFORMATION (CONTINUED) An analysis of our business segment information and reconciliation to the accompanying Consolidated Financial Statements is as follows: GLOBAL RIM BUSINESS GLOBAL CORPORATE TOTAL As of and for the Year Ended December 31, 2020 Total Revenues $ 3,699,280 $ 279,312 $ 168,678 $ 4,147,270 Storage Rental 2,373,783 263,695 116,613 2,754,091 Service 1,325,497 15,617 52,065 1,393,179 Depreciation and Amortization 455,567 134,844 61,658 652,069 Depreciation 309,969 83,106 54,487 447,562 Amortization 145,598 51,738 7,171 204,507 Adjusted EBITDA 1,574,069 126,576 (224,924) 1,475,721 Total Assets (1) 10,938,359 2,727,654 483,254 14,149,267 Expenditures for Segment Assets 338,006 249,459 44,389 631,854 Capital Expenditures 150,175 243,699 44,389 438,263 Cash Paid for Acquisitions, Net of Cash Acquired 118,581 — — 118,581 Acquisitions of Customer Relationships, Customer Inducements and Contract Fulfillment Costs 69,250 5,760 — 75,010 As of and for the Year Ended December 31, 2019 Total Revenues $ 3,812,433 $ 257,151 $ 193,000 $ 4,262,584 Storage Rental 2,320,076 246,925 114,086 2,681,087 Service 1,492,357 10,226 78,914 1,581,497 Depreciation and Amortization 454,652 133,927 69,622 658,201 Depreciation 330,534 78,939 46,850 456,323 Amortization 124,118 54,988 22,772 201,878 Adjusted EBITDA 1,566,065 121,517 (218,573) 1,469,009 Total Assets (1) 10,753,218 2,535,848 527,750 13,816,816 Expenditures for Segment Assets 398,690 427,935 56,242 882,867 Capital Expenditures 248,232 392,029 52,722 692,983 Cash Paid for Acquisitions, Net of Cash Acquired 54,717 — 3,520 58,237 Acquisitions of Customer Relationships, Customer Inducements, Contract Fulfillment Costs and third-party commissions 95,741 35,906 — 131,647 As of and for the Year Ended December 31, 2018 Total Revenues $ 3,842,600 $ 228,983 $ 154,178 $ 4,225,761 Storage Rental 2,301,344 218,675 102,436 2,622,455 Service 1,541,256 10,308 51,742 1,603,306 Depreciation and Amortization 472,155 105,680 61,679 639,514 Depreciation 341,384 58,707 52,649 452,740 Amortization 130,771 46,973 9,030 186,774 Adjusted EBITDA 1,572,438 99,575 (213,089) 1,458,924 Total Assets (1) 9,135,198 2,217,505 504,515 11,857,218 Expenditures for Segment Assets 443,634 1,794,386 79,286 2,317,306 Capital Expenditures 254,308 152,739 53,015 460,062 Cash Paid for Acquisitions, Net of Cash Acquired 93,217 1,639,427 25,913 1,758,557 Acquisitions of Customer Relationships, Customer Inducements and Contract Fulfillment Costs 96,109 2,220 358 98,687 (1) Excludes all intercompany receivables or payables and investment in subsidiary balances. 10. SEGMENT INFORMATION (CONTINUED) The accounting policies of the reportable segments are the same as those described in Note 2. During the fourth quarter of 2020, we changed our definition of Adjusted EBITDA to (a) exclude stock-based compensation expense and (b) include our share of Adjusted EBITDA from our unconsolidated joint ventures. All prior periods have been recast to conform to these changes. We now define Adjusted EBITDA for each segment as income (loss) from continuing operations before interest expense, net, provision (benefit) for income taxes, depreciation and amortization (inclusive of our share of Adjusted EBITDA from our unconsolidated joint ventures), and excluding certain items we do not believe to be indicative of our core operating results, specifically: EXCLUDED • Significant Acquisition Costs • Restructuring Charges • Intangible impairments • (Gain) loss on disposal/write-down of property, plant and equipment, net (including real estate) • Other expense (income), net • Stock-based compensation expense • COVID-19 Costs (as defined below) Internally, we use Adjusted EBITDA as the basis for evaluating the performance of, and allocated resources to, our operating segments. A reconciliation of Income (Loss) from Continuing Operations to Adjusted EBITDA on a consolidated basis for the years ended December 31, 2020, 2019 and 2018 is as follows: YEAR ENDED DECEMBER 31, 2020 2019 2018 Income (Loss) from Continuing Operations $ 343,096 $ 268,211 $ 367,558 Add/(Deduct): Interest expense, net 418,535 419,298 409,648 Provision (benefit) for income taxes 29,609 59,931 42,753 Depreciation and amortization 652,069 658,201 639,514 Significant Acquisition Costs — 13,293 50,665 Restructuring Charges 194,396 48,597 — Intangible impairments 23,000 — — (Gain) loss on disposal/write-down of property, plant and equipment, net (including real estate) (363,537) (63,824) (73,622) Other expense (income), net, excluding our share of losses (gains) from our unconsolidated joint ventures (1) 133,611 25,720 (11,867) Stock-based compensation expense (2) 34,272 36,194 31,014 COVID-19 Costs (3) 9,285 — — Our share of Adjusted EBITDA reconciling items from our unconsolidated joint ventures 1,385 3,388 3,261 Adjusted EBITDA $ 1,475,721 $ 1,469,009 $ 1,458,924 (1) Includes foreign currency transaction losses (gains), net, debt extinguishment expense and other, net. (2) Stock-based compensation expense related to Project Summit is included within Restructuring Charges for the years ended December 31, 2020 and 2019. (3) Costs that are incremental and directly attributable to the COVID-19 pandemic which are not expected to recur once the pandemic ends (“COVID-19 Costs”). For the year ended December 31, 2020, approximately $7,600 and $1,600 of COVID-19 Costs are included within Cost of sales and Selling, general and administrative expenses, respectively, on our Consolidated Statement of Operations. These costs include the purchase of personal protective equipment for our employees and incremental cleaning costs of our facilities, among other direct costs. 10. SEGMENT INFORMATION (CONTINUED) Information as to our operations in different geographical areas for the years ended December 31, 2020, 2019 and 2018 is as follows: YEAR ENDED DECEMBER 31, 2020 2019 2018 Revenues: United States $ 2,577,084 $ 2,632,586 $ 2,579,847 United Kingdom 247,667 274,931 280,993 Canada 224,860 243,033 249,505 Australia 133,815 143,511 155,367 Remaining Countries 963,844 968,523 960,049 Long-lived Assets: United States $ 7,818,059 $ 7,862,262 $ 6,902,232 United Kingdom 838,491 755,859 547,768 Canada 556,120 556,591 453,398 Australia 575,862 530,755 442,755 Remaining Countries 3,090,948 2,875,010 2,302,951 Information as to our revenues by product and service lines by segment for the years ended December 31, 2020, 2019 and 2018 is as follows: GLOBAL RIM BUSINESS GLOBAL CORPORATE TOTAL For the Year Ended December 31, 2020 Records Management (1) $ 2,852,296 $ — $ 102,003 $ 2,954,299 Data Management (1) 488,198 — 66,675 554,873 Information Destruction (1)(2) 358,786 — — 358,786 Data Center — 279,312 — 279,312 For the Year Ended December 31, 2019 Records Management (1) $ 2,866,192 $ — $ 128,954 $ 2,995,146 Data Management (1) 520,082 — 64,046 584,128 Information Destruction (1)(2) 426,159 — — 426,159 Data Center — 257,151 — 257,151 For the Year Ended December 31, 2018 Records Management (1) $ 2,871,253 $ — $ 96,669 $ 2,967,922 Data Management (1) 539,035 — 57,509 596,544 Information Destruction (1)(2) 432,312 — — 432,312 Data Center — 228,983 — 228,983 (1) Each of the offerings within our product and service lines has a component of revenue that is storage rental related and a component that is service revenues, except the destruction services offering, which does not have a storage rental component. (2) Includes Secure Shredding services.

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2020
Related Party Transactions [Abstract]
Related Party Transactions	RELATED PARTY TRANSACTIONS In October 2020, in connection with the Frankfurt JV Transaction, we entered into agreements whereby we will earn various fees, including property management and construction and development fees, for services we are providing to the Frankfurt JV (the “Frankfurt JV Agreements”). Revenues and expenses associated with the Frankfurt JV Agreements are presented as a component of our Global Data Business segment. During the year ended December 31, 2020, we recognized revenue of approximately $400 associated with the Frankfurt JV Agreements. In March 2019, in connection with the Consumer Storage Transaction and the MakeSpace Investment, we entered into a storage and service agreement with the MakeSpace JV to provide certain storage and related services to the MakeSpace JV (the "MakeSpace Agreement”). Revenues and expenses associated with the MakeSpace Agreement are presented as a component of our Global RIM Business segment. During the years ended December 31, 2020 and 2019, we recognized revenue of approximately $33,600 and $22,500, respectively, associated with the MakeSpace Agreement. During the years ended December 31, 2020, 2019 and 2018, the Company had no other related party transactions.

Project Summit

Project Summit	12 Months Ended
	Dec. 31, 2020
Restructuring and Related Activities [Abstract]
Project Summit	PROJECT SUMMIT In October 2019, we announced Project Summit, our global program designed to better position us for future growth and achievement of our strategic objectives. We expanded Project Summit during the first quarter of 2020 to include additional opportunities to streamline our business and operations, as well as accelerated the timing of certain opportunities previously identified. Such opportunities include leveraging new technology solutions to enable us to modernize our service delivery model and more efficiently utilize our fleet, labor and real estate. As a result of the program, we expect to reduce the number of positions at vice president and above by approximately 45%. The total program is expected to reduce our total managerial and administrative workforce by approximately 700 positions by the end of 2021. We have also reduced our services and operations workforce. As of December 31, 2020, we have completed approximately 70% of our planned workforce reductions. The activities associated with Project Summit began in the fourth quarter of 2019 and are expected to be substantially complete by the end of 2021. We estimate that the implementation of Project Summit will result in total operating expenditures ("Restructuring Charges") of approximately $450,000 that primarily consist of: (1) employee severance costs; (2) internal costs associated with the development and implementation of Project Summit initiatives; (3) professional fees, primarily related to third party consultants who are assisting with the design and execution of various initiatives as well as project management activities and (4) system implementation and data conversion costs. Restructuring Charges included in the accompanying Consolidated Statement of Operations for the years ended December 31, 2020 and 2019, and from the inception of Project Summit through December 31, 2020, are as follows: YEAR ENDED YEAR ENDED FROM THE INCEPTION OF PROJECT SUMMIT THROUGH DECEMBER 31, 2020 Employee severance costs $ 47,349 $ 20,850 $ 68,199 Professional fees and other costs 147,047 27,747 174,794 Restructuring Charges $ 194,396 $ 48,597 $ 242,993 12. PROJECT SUMMIT (CONTINUED) Restructuring Charges included in the accompanying Consolidated Statement of Operations by segment for the years ended December 31, 2020 and 2019, and from inception of Project Summit through December 31, 2020, are as follows: YEAR ENDED YEAR ENDED FROM THE INCEPTION OF PROJECT SUMMIT THROUGH DECEMBER 31, 2020 Global RIM Business $ 67,140 $ 21,900 $ 89,040 Global Data Center Business 1,632 306 1,938 Corporate and Other Business 125,624 26,391 152,015 Restructuring Charges $ 194,396 $ 48,597 $ 242,993 A rollforward of the accrued Restructuring Charges, which is included as a component of Accrued expenses and other current liabilities in our Consolidated Balance Sheet for the year ended December 31, 2020 is as follows: EMPLOYEE SEVERANCE COSTS PROFESSIONAL FEES AND OTHER TOTAL ACCRUED RESTRUCTURING CHARGES Inception of Project Summit $ — $ — $ — Amounts accrued 20,850 27,747 48,597 Payments (16,027) (14,793) (30,820) Other, including currency translation adjustments — — — Balance as of December 31, 2019 4,823 12,954 17,777 Amounts accrued 47,349 147,047 194,396 Payments (32,455) (136,222) (168,677) Other, including currency translation adjustments (3,439) (4) (3,443) Balance as of December 31, 2020 $ 16,278 $ 23,775 $ 40,053

SCHEDULE III - SCHEDULE OF REAL

SCHEDULE III - SCHEDULE OF REAL ESTATE AND ACCUMULATED DEPRECIATION	12 Months Ended
	Dec. 31, 2020
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation Disclosure [Abstract]
Schedule III - Schedule of Real Estate and Accumulated Depreciation	Schedule III - Schedule of Real Estate and Accumulated Depreciation (“Schedule III”) reflects the cost and associated accumulated depreciation for the real estate facilities that are owned. The gross cost included in Schedule III includes the cost for land, land improvements, buildings, building improvements and racking. Schedule III does not reflect the 1,167 leased facilities in our real estate portfolio. In addition, Schedule III does not include any value for financing leases for property that is classified as land, buildings and building improvements in our consolidated financial statements. The following table presents a reconciliation of the gross amount of real estate assets, as presented in Schedule III below, to the sum of the historical book value of land, buildings and building improvements, racking and construction in progress as disclosed in Note 2.h. to Notes to Consolidated Financial Statements as of December 31, 2020: Gross Amount of Real Estate Assets, As Reported on Schedule III $ 3,830,489 Add Reconciling Items: Book value of racking included in leased facilities (1) 1,448,654 Book value of financing leases (2) 410,583 Book value of construction in progress (3) 287,580 Total Reconciling Items 2,146,817 Gross Amount of Real Estate Assets, As Disclosed in Note 2.h. $ 5,977,306 (1) Represents the gross book value of racking installed in our 1,167 leased facilities, which is included in historical book value of racking in Note 2.h., but excluded from Schedule III. (2) Represents the gross book value of buildings and building improvements that are subject to financing leases, which are included in the historical book value of building and building improvements in Note 2.h., but excluded from Schedule III. (3) Represents the gross book value of non-real estate assets that are included in the historical book value of construction in progress assets in Note 2.h. The historical book value of real estate assets associated with owned buildings that were related to construction in progress as of December 31, 2020 is included in Schedule III. The following table presents a reconciliation of the accumulated depreciation of real estate assets, as presented in Schedule III below, to the total accumulated depreciation for all property, plant and equipment presented on our Consolidated Balance Sheet as of December 31, 2020: Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III $ 1,097,616 Add Reconciling Items: Accumulated Depreciation - non-real estate assets (1) 1,549,986 Accumulated Depreciation - racking in leased facilities (2) 941,028 Accumulated Depreciation - financing leases (3) 155,264 Total Reconciling Items 2,646,278 Accumulated Depreciation, As Reported on Consolidated Balance Sheet $ 3,743,894 (1) Represents the accumulated depreciation of non-real estate assets that is included in the total accumulated depreciation of property, plant and equipment on our Consolidated Balance Sheet, but excluded from Schedule III as the assets to which this accumulated depreciation relates are not considered real estate assets associated with owned buildings. (2) Represents the accumulated depreciation of racking as of December 31, 2020 installed in our 1,167 leased facilities, which is included in total accumulated depreciation of property, plant and equipment on our Consolidated Balance Sheet, but excluded from Schedule III, as disclosed in Footnote 1 to Schedule III. (3) Represents the accumulated depreciation of buildings and building improvements as of December 31, 2020 that are subject to financing leases, which is included in the total accumulated depreciation of property, plant and equipment on our Consolidated Balance Sheet, but excluded from Schedule III, as disclosed in Footnote 1 to Schedule III. (A) (B) (C) (D) (E) (F) REGION/COUNTRY/ FACILITIES (1) ENCUMBRANCES INITIAL COST TO COMPANY (1) COST CAPITALIZED SUBSEQUENT TO ACQUISITION (1)(2) GROSS AMOUNT CARRIED AT CLOSE OF CURRENT PERIOD (1)(8) ACCUMULATED DEPRECIATION AT CLOSE OF CURRENT PERIOD (1)(8) DATE OF CONSTRUCTION OR ACQUIRED (3) LIFE ON WHICH North America United States 140 Oxmoor Ct, Birmingham, Alabama 1 $ — $ 1,322 $ 978 $ 2,300 $ 1,181 2001 Up to 40 years 1420 North Fiesta Blvd, Gilbert, Arizona 1 — 1,637 2,741 4,378 2,115 2001 Up to 40 years 4802 East Van Buren, Phoenix, Arizona 1 — 15,599 143,887 159,486 3,246 2019 Up to 40 years 615 North 48th Street, Phoenix, Arizona 1 — 423,107 21,338 444,445 43,817 2018 (5) Up to 40 years 2955 S. 18th Place, Phoenix, Arizona 1 — 12,178 14,250 26,428 6,019 2007 Up to 40 years 4449 South 36th St, Phoenix, Arizona 1 — 7,305 1,049 8,354 5,190 2012 Up to 40 years 8521 E. Princess Drive, Scottsdale, Arizona 1 — 87,865 1,879 89,744 12,425 2018 (5) Up to 40 years 600 Burning Tree Rd, Fullerton, California 1 — 4,762 1,899 6,661 3,091 2002 Up to 40 years 21063 Forbes St, Hayward, California 1 — 13,407 365 13,772 2,912 2019 (7) Up to 40 years 1025 North Highland Ave, Los Angeles, California 1 — 10,168 26,791 36,959 15,136 1988 Up to 40 years 1010 - 1006 North Mansfield, Los Angeles, California 1 — 749 — 749 128 2014 Up to 40 years 1350 West Grand Ave, Oakland, California 1 — 15,172 7,251 22,423 15,293 1997 Up to 40 years 1760 North Saint Thomas Circle, Orange, California 1 — 4,576 499 5,075 1,981 2002 Up to 40 years 1915 South Grand Ave, Santa Ana, California 1 — 3,420 1,272 4,692 2,027 2001 Up to 40 years 2680 Sequoia Dr, South Gate, California 1 — 6,329 2,251 8,580 4,291 2002 Up to 40 years 336 Oyster Point Blvd, South San Francisco, California 1 — 15,100 49 15,149 2,446 2019 (7) Up to 40 years 25250 South Schulte Rd, Tracy, California 1 — 3,049 1,774 4,823 2,232 2001 Up to 40 years 3576 N. Moline, Aurora, Colorado 1 — 1,583 4,469 6,052 2,025 2001 Up to 40 years 5151 E. 46th Ave, Denver, Colorado 1 — 6,312 709 7,021 1,752 2014 Up to 40 years (A) (B) (C) (D) (E) (F) REGION/COUNTRY/ FACILITIES (1) ENCUMBRANCES INITIAL COST TO COMPANY (1) COST CAPITALIZED SUBSEQUENT TO ACQUISITION (1)(2) GROSS AMOUNT CARRIED AT CLOSE OF CURRENT PERIOD (1)(8) ACCUMULATED DEPRECIATION AT CLOSE OF CURRENT PERIOD (1)(8) DATE OF CONSTRUCTION OR ACQUIRED (3) LIFE ON WHICH North America (continued) United States 11333 E 53rd Ave, Denver, Colorado 1 $ — $ 7,403 $ 10,232 $ 17,635 $ 9,949 2001 Up to 40 years 4300 Brighton Boulevard, Denver, Colorado 1 — 116,336 21,257 137,593 14,131 2017 Up to 40 years 20 Eastern Park Rd, East Hartford, Connecticut 1 — 7,417 1,904 9,321 6,340 2002 Up to 40 years Bennett Rd, Suffield, Connecticut 2 — 1,768 940 2,708 1,459 2000 Up to 40 years Kennedy Road, Windsor, Connecticut 2 — 10,447 31,259 41,706 21,987 2001 Up to 40 years 293 Ella Grasso Rd, Windsor Locks, Connecticut 1 — 4,021 2,072 6,093 3,008 2002 Up to 40 years 150-200 Todds Ln, Wilmington, Delaware 1 — 7,226 1,048 8,274 5,205 2002 Up to 40 years 13280 Vantage Way, Jacksonville, Florida 1 — 1,853 573 2,426 1,013 2001 Up to 40 years 12855 Starkey Rd, Largo, Florida 1 — 3,293 3,005 6,298 3,399 2001 Up to 40 years 7801 Riviera Blvd, Miramar, Florida 1 — 8,250 234 8,484 1,027 2017 Up to 40 years 10002 Satellite Blvd, Orlando, Florida 1 — 1,927 343 2,270 938 2001 Up to 40 years 3501 Electronics Way, West Palm Beach, Florida 1 — 4,201 13,851 18,052 7,604 2001 Up to 40 years 1890 MacArthur Blvd, Atlanta, Georgia 1 — 1,786 772 2,558 1,193 2002 Up to 40 years 3881 Old Gordon Rd, Atlanta, Georgia 1 — 1,185 790 1,975 898 2001 Up to 40 years 5319 Tulane Drive SW, Atlanta, Georgia 1 — 2,808 3,940 6,748 3,560 2002 Up to 40 years 6111 Live Oak Parkway, Norcross, Georgia 1 — 3,542 2,720 6,262 517 2017 Up to 40 years 3150 Nifda Dr, Smyrna, Georgia 1 — 463 777 1,240 763 1990 Up to 40 years 2425 South Halsted St, Chicago, Illinois 1 — 7,470 1,670 9,140 4,536 2006 Up to 40 years 1301 S. Rockwell St, Chicago, Illinois 1 — 7,947 19,884 27,831 16,600 1999 Up to 40 years (A) (B) (C) (D) (E) (F) REGION/COUNTRY/ FACILITIES (1) ENCUMBRANCES INITIAL COST TO COMPANY (1) COST CAPITALIZED SUBSEQUENT TO ACQUISITION (1)(2) GROSS AMOUNT CARRIED AT CLOSE OF CURRENT PERIOD (1)(8) ACCUMULATED DEPRECIATION AT CLOSE OF CURRENT PERIOD (1)(8) DATE OF CONSTRUCTION OR ACQUIRED (3) LIFE ON WHICH North America (continued) United States 2604 West 13th St, Chicago, Illinois 1 $ — $ 404 $ 2,888 $ 3,292 $ 2,874 2001 Up to 40 years 2211 W. Pershing Rd, Chicago, Illinois 1 — 4,264 13,995 18,259 9,024 2001 Up to 40 years 2255 Pratt Blvd, Elk Grove, Illinois 1 — 1,989 3,893 5,882 1,681 2000 Up to 40 years 4175 Chandler Dr Opus No. Corp, Hanover Park, Illinois 1 — 22,048 2,801 24,849 10,352 2014 Up to 40 years 2600 Beverly Drive, Lincoln, Illinois 1 — 1,378 923 2,301 319 2015 Up to 40 years 6090 NE 14th Street, Des Moines, Iowa 1 — 622 511 1,133 443 2003 Up to 40 years South 7th St, Louisville, Kentucky 4 — 709 14,547 15,256 5,885 Various Up to 40 years 26 Parkway Drive (fka 133 Pleasant), Scarborough, Maine 1 — 8,337 389 8,726 3,386 2015 (7) Up to 40 years 8928 McGaw Ct, Columbia, Maryland 1 — 2,198 6,441 8,639 3,905 1999 Up to 40 years 10641 Iron Bridge Rd, Jessup, Maryland 1 — 3,782 1,459 5,241 2,801 2000 Up to 40 years 96 High St, Billerica, Massachusetts 1 — 3,221 3,948 7,169 3,781 1998 Up to 40 years 120 Hampden St, Boston, Massachusetts 1 — 164 939 1,103 576 2002 Up to 40 years 32 George St, Boston, Massachusetts 1 — 1,820 5,391 7,211 5,630 1991 Up to 40 years 14500 Weston Pkwy, Cary, North Carolina 1 — 1,880 2,229 4,109 2,071 1999 Up to 40 years 3435 Sharps Lot Rd, Dighton, Massachusetts 1 — 1,911 797 2,708 2,130 1999 Up to 40 years 77 Constitution Boulevard, Franklin, Massachusetts 1 — 5,413 224 5,637 857 2014 Up to 40 years 216 Canal St, Lawrence, Massachusetts 1 — 1,298 1,123 2,421 1,840 2001 Up to 40 years Bearfoot Road, Northboro, Massachusetts 2 — 55,923 12,745 68,668 42,266 Various Up to 40 years 38300 Plymouth Road, Livonia, Michigan 1 — 10,285 1,920 12,205 4,310 2015 (7) Up to 40 years (A) (B) (C) (D) (E) (F) REGION/COUNTRY/ FACILITIES (1) ENCUMBRANCES INITIAL COST TO COMPANY (1) COST CAPITALIZED SUBSEQUENT TO ACQUISITION (1)(2) GROSS AMOUNT CARRIED AT CLOSE OF CURRENT PERIOD (1)(8) ACCUMULATED DEPRECIATION AT CLOSE OF CURRENT PERIOD (1)(8) DATE OF CONSTRUCTION OR ACQUIRED (3) LIFE ON WHICH North America (continued) United States 6601 Sterling Dr South, Sterling Heights, Michigan 1 $ — $ 1,294 $ 1,250 $ 2,544 $ 1,276 2002 Up to 40 years 1985 Bart Ave, Warren, Michigan 1 — 1,802 530 2,332 1,187 2000 Up to 40 years Wahl Court, Warren, Michigan 2 — 3,426 2,684 6,110 3,882 Various Up to 40 years 31155 Wixom Rd, Wixom, Michigan 1 — 4,000 1,482 5,482 2,872 2001 Up to 40 years 3140 Ryder Trail South, Earth City, Missouri 1 — 3,072 3,398 6,470 2,558 2004 Up to 40 years Missouri Bottom Road, Hazelwood, Missouri 4 — 28,282 5,073 33,355 8,667 Various (7) Up to 40 years Leavenworth St/18th St, Omaha, Nebraska 3 — 2,924 19,855 22,779 8,295 Various Up to 40 years 4105 North Lamb Blvd, Las Vegas, Nevada 1 — 3,430 8,965 12,395 6,276 2002 Up to 40 years 17 Hydro Plant Rd, Milton, New Hampshire 1 — 6,179 4,445 10,624 6,895 2001 Up to 40 years 3003 Woodbridge Avenue, Edison, New Jersey 1 — 310,404 56,509 366,913 29,990 2018 (5) Up to 40 years 811 Route 33, Freehold, New Jersey 3 — 38,697 57,207 95,904 56,003 Various Up to 40 years 51-69 & 77-81 Court St, Newark, New Jersey 1 — 11,734 10,437 22,171 2,179 2015 Up to 40 years 560 Irvine Turner Blvd, Newark, New Jersey 1 — 9,522 1,718 11,240 1,109 2015 Up to 40 years 231 Johnson Ave, Newark, New Jersey 1 — 8,945 2,399 11,344 1,173 2015 Up to 40 years 650 Howard Avenue, Somerset, New Jersey 1 — 3,585 11,835 15,420 6,553 2006 Up to 40 years 100 Bailey Ave, Buffalo, New York 1 — 1,324 11,437 12,761 7,052 1998 Up to 40 years 64 Leone Ln, Chester, New York 1 — 5,086 1,132 6,218 3,606 2000 Up to 40 years 1368 County Rd 8, Farmington, New York 1 — 2,611 4,788 7,399 4,869 1998 Up to 40 years County Rd 10, Linlithgo, New York 2 — 102 3,233 3,335 1,782 2001 Up to 40 years 77 Seaview Blvd, N. Hempstead New York 1 — 5,719 1,442 7,161 2,925 2006 Up to 40 years (A) (B) (C) (D) (E) (F) REGION/COUNTRY/ FACILITIES (1) ENCUMBRANCES INITIAL COST TO COMPANY (1) COST CAPITALIZED SUBSEQUENT TO ACQUISITION (1)(2) GROSS AMOUNT CARRIED AT CLOSE OF CURRENT PERIOD (1)(8) ACCUMULATED DEPRECIATION AT CLOSE OF CURRENT PERIOD (1)(8) DATE OF CONSTRUCTION OR ACQUIRED (3) LIFE ON WHICH North America (continued) United States 37 Hurds Corner Road, Pawling, New York 1 $ — $ 4,323 $ 1,285 $ 5,608 $ 2,471 2005 Up to 40 years Ulster Ave/Route 9W, Port Ewen, New York 3 — 23,137 11,745 34,882 23,388 2001 Up to 40 years Binnewater Rd, Rosendale, New York 2 — 5,142 11,827 16,969 7,696 Various Up to 40 years 220 Wavel St, Syracuse, New York 1 — 2,929 2,765 5,694 3,098 1997 Up to 40 years 2235 Cessna Drive, Burlington, North Carolina 1 — 1,602 328 1,930 277 2015 Up to 40 years 826 Church Street, Morrisville, North Carolina 1 — 7,087 266 7,353 1,558 2017 Up to 40 years 1275 East 40th, Cleveland, Ohio 1 — 3,129 606 3,735 2,137 1999 Up to 40 years 7208 Euclid Avenue, Cleveland, Ohio 1 — 3,336 4,071 7,407 3,471 2001 Up to 40 years 4260 Tuller Ridge Rd, Dublin, Ohio 1 — 1,030 1,881 2,911 1,562 1999 Up to 40 years 3366 South Tech Boulevard, Miamisburg, Ohio 1 — 29,092 674 29,766 3,085 2018 (5) Up to 40 years 302 South Byrne Rd, Toledo, Ohio 1 — 602 1,090 1,692 820 2001 Up to 40 years 7530 N. Leadbetter Road, Portland, Oregon 1 — 5,187 1,874 7,061 4,314 2002 Up to 40 years Branchton Rd, Boyers, Pennsylvania 3 — 21,166 243,167 264,333 70,834 Various Up to 40 years 800 Carpenters Crossings, Folcroft, Pennsylvania 1 — 2,457 976 3,433 2,168 2000 Up to 40 years Las Flores Industrial Park, Rio Grande, Puerto Rico 1 — 4,185 3,528 7,713 4,698 2001 Up to 40 years 24 Snake Hill Road, Chepachet, Rhode Island 1 — 2,659 2,243 4,902 3,120 2001 Up to 40 years 1061 Carolina Pines Road, Columbia, South Carolina 1 — 11,776 2,348 14,124 3,706 2016 (7) Up to 40 years 2301 Prosperity Way, Florence, South Carolina 1 — 2,846 1,259 4,105 1,427 2016 (7) Up to 40 years Mitchell Street, Knoxville, Tennessee 2 — 718 4,575 5,293 2,229 Various Up to 40 years (A) (B) (C) (D) (E) (F) REGION/COUNTRY/ FACILITIES (1) ENCUMBRANCES INITIAL COST TO COMPANY (1) COST CAPITALIZED SUBSEQUENT TO ACQUISITION (1)(2) GROSS AMOUNT CARRIED AT CLOSE OF CURRENT PERIOD (1)(8) ACCUMULATED DEPRECIATION AT CLOSE OF CURRENT PERIOD (1)(8) DATE OF CONSTRUCTION OR ACQUIRED (3) LIFE ON WHICH North America (continued) United States 6005 Dana Way, Nashville, Tennessee 2 $ — $ 1,827 $ 3,063 $ 4,890 $ 2,105 2000 Up to 40 years 11406 Metric Blvd, Austin, Texas 1 — 5,489 2,212 7,701 4,274 2002 Up to 40 years 6600 Metropolis Drive, Austin, Texas 1 — 4,519 454 4,973 1,529 2011 Up to 40 years Capital Parkway, Carrollton, Texas 3 — 8,299 9,991 18,290 3,182 2015 (7) Up to 40 years 1800 Columbian Club Dr, Carrolton, Texas 1 — 19,673 1,190 20,863 10,111 2013 Up to 40 years 1905 John Connally Dr, Carrolton, Texas 1 — 2,174 848 3,022 1,481 2000 Up to 40 years 13425 Branchview Ln, Dallas, Texas 1 — 3,518 3,685 7,203 4,335 2001 Up to 40 years Cockrell Ave, Dallas, Texas 1 — 1,277 1,597 2,874 2,013 2000 Up to 40 years 1819 S. Lamar St, Dallas, Texas 1 — 3,215 1,145 4,360 2,715 2000 Up to 40 years 2000 Robotics Place Suite B, Fort Worth, Texas 1 — 5,328 2,269 7,597 3,173 2002 Up to 40 years 1202 Ave R, Grand Prairie, Texas 1 — 8,354 2,204 10,558 6,283 2003 Up to 40 years 6203 Bingle Rd, Houston, Texas 1 — 3,188 11,495 14,683 9,102 2001 Up to 40 years 3502 Bissonnet St, Houston, Texas 1 — 7,687 722 8,409 6,051 2002 Up to 40 years 2600 Center Street, Houston, Texas 1 — 2,840 2,227 5,067 2,724 2000 Up to 40 years 5707 Chimney Rock, Houston, Texas 1 — 1,032 1,211 2,243 1,145 2002 Up to 40 years 5249 Glenmont Ave, Houston, Texas 1 — 3,467 2,406 5,873 2,952 2000 Up to 40 years 15333 Hempstead Hwy, Houston, Texas 3 — 6,327 37,843 44,170 14,745 2004 Up to 40 years 5757 Royalton Dr, Houston, Texas 1 — 1,795 1,024 2,819 1,374 2000 Up to 40 years 9601 West Tidwell, Houston, Texas 1 — 1,680 2,395 4,075 1,424 2001 Up to 40 years 7800 Westpark, Houston, Texas 1 — 6,323 1,344 7,667 2,010 2015 (7) Up to 40 years 15300 FM 1825, Pflugerville, Texas 2 — 3,811 8,015 11,826 5,482 2001 Up to 40 years (A) (B) (C) (D) (E) (F) REGION/COUNTRY/ FACILITIES (1) ENCUMBRANCES INITIAL COST TO COMPANY (1) COST CAPITALIZED SUBSEQUENT TO ACQUISITION (1)(2) GROSS AMOUNT CARRIED AT CLOSE OF CURRENT PERIOD (1)(8) ACCUMULATED DEPRECIATION AT CLOSE OF CURRENT PERIOD (1)(8) DATE OF CONSTRUCTION OR ACQUIRED (3) LIFE ON WHICH North America (continued) United States 930 Avenue B, San Antonio, Texas 1 $ — $ 393 $ 245 $ 638 $ 279 1998 Up to 40 years 931 North Broadway, San Antonio, Texas 1 — 3,526 1,161 4,687 2,963 1999 Up to 40 years 1665 S. 5350 West, Salt Lake City, Utah 1 — 6,239 4,273 10,512 5,622 2002 Up to 40 years 11052 Lakeridge Pkwy, Ashland, Virginia 1 — 1,709 1,927 3,636 1,974 1999 Up to 40 years 2301 International Parkway, Fredericksburg, Virginia 1 — 20,980 240 21,220 6,397 2015 (7) Up to 40 years 11660 Hayden Road, Manassas, Virginia 1 — 104,824 — 104,824 — 2020 Up to 40 years 4555 Progress Road, Norfolk, Virginia 1 — 6,527 1,125 7,652 3,541 2011 Up to 40 years 3725 Thirlane Rd. N.W., Roanoke, Virginia 1 — 2,577 190 2,767 1,265 2015 (7) Up to 40 years 7700-7730 Southern Dr, Springfield, Virginia 1 — 14,167 2,776 16,943 9,761 2002 Up to 40 years 22445 Randolph Dr, Sterling, Virginia 1 — 7,598 3,737 11,335 6,328 2005 Up to 40 years 307 South 140th St, Burien, Washington 1 — 2,078 2,367 4,445 2,476 1999 Up to 40 years 8908 W. Hallett Rd, Cheney, Washington 1 — 510 4,266 4,776 2,250 1999 Up to 40 years 6600 Hardeson Rd, Everett, Washington 1 — 5,399 3,435 8,834 3,774 2002 Up to 40 years 1201 N. 96th St, Seattle, Washington 1 — 4,496 2,531 7,027 3,744 2001 Up to 40 years 4330 South Grove Road, Spokane, Washington 1 — 3,906 850 4,756 608 2015 Up to 40 years 12021 West Bluemound Road, Wauwatosa, Wisconsin 1 — 1,307 2,134 3,441 1,542 1999 Up to 40 years 160 $ — $ 1,833,229 $ 1,062,809 $ 2,896,038 $ 777,507 (A) (B) (C) (D) (E) (F) REGION/COUNTRY/ FACILITIES (1) ENCUMBRANCES INITIAL COST TO COMPANY (1) COST CAPITALIZED SUBSEQUENT TO ACQUISITION (1)(2) GROSS AMOUNT CARRIED AT CLOSE OF CURRENT PERIOD (1)(8) ACCUMULATED DEPRECIATION AT CLOSE OF CURRENT PERIOD (1)(8) DATE OF CONSTRUCTION OR ACQUIRED (3) LIFE ON WHICH North America (continued) Canada One Command Court, Bedford 1 $ — $ 3,847 $ 4,719 $ 8,566 $ 4,517 2000 Up to 40 years 195 Summerlea Road, Brampton 1 — 5,403 6,786 12,189 5,982 2000 Up to 40 years 10 Tilbury Court, Brampton 1 — 5,007 17,897 22,904 8,974 2000 Up to 40 years 8825 Northbrook Court, Burnaby 1 — 8,091 2,476 10,567 5,097 2001 Up to 40 years 8088 Glenwood Drive, Burnaby 1 — 4,326 7,414 11,740 5,143 2005 Up to 40 years 5811 26th Street S.E., Calgary 1 — 14,658 9,497 24,155 12,102 2000 Up to 40 years 3905-101 Street, Edmonton 1 — 2,020 910 2,930 1,703 2000 Up to 40 years 68 Grant Timmins Drive, Kingston 1 — 3,639 753 4,392 458 2016 Up to 40 years 3005 Boul. Jean-Baptiste Deschamps, Lachine 1 — 2,751 579 3,330 1,506 2000 Up to 40 years 1655 Fleetwood, Laval 1 — 8,196 18,761 26,957 14,003 2000 Up to 40 years 4005 Richelieu, Montreal 1 — 1,800 2,657 4,457 1,912 2000 Up to 40 years 1209 Algoma Rd, Ottawa 1 — 1,059 7,178 8,237 4,426 2000 Up to 40 years 1650 Comstock Rd, Ottawa 1 — 7,478 90 7,568 2,884 2017 Up to 40 years 235 Edson Street, Saskatoon 1 — 829 1,731 2,560 955 2008 Up to 40 years 640 Coronation Drive, Scarborough 1 — 1,853 1,345 3,198 1,399 2000 Up to 40 years 610 Sprucewood Ave, Windsor 1 — 1,243 733 1,976 778 2007 Up to 40 years 16 $ — $ 72,200 $ 83,526 $ 155,726 $ 71,839 176 $ — $ 1,905,429 $ 1,146,335 $ 3,051,764 $ 849,346 (A) (B) (C) (D) (E) (F) REGION/COUNTRY/ FACILITIES (1) ENCUMBRANCES INITIAL COST TO COMPANY (1) COST CAPITALIZED SUBSEQUENT TO ACQUISITION (1)(2) GROSS AMOUNT CARRIED AT CLOSE OF CURRENT PERIOD (1)(8) ACCUMULATED DEPRECIATION AT CLOSE OF CURRENT PERIOD (1)(8) DATE OF CONSTRUCTION OR ACQUIRED (3) LIFE ON WHICH Europe Gewerbeparkstr. 3, Vienna, Austria 1 $ — $ 6,542 $ 9,431 $ 15,973 $ 4,510 2010 Up to 40 years Woluwelaan 147, Diegem, Belgium 1 — 2,541 7,137 9,678 4,953 2003 Up to 40 years Stupničke Šipkovine 62, Zagreb, Croatia 1 — 1,408 829 2,237 151 2003 Up to 40 years Kratitirion 9 Kokkinotrimithia Industrial District, Nicosia, Cyprus 1 — 3,136 4,031 7,167 802 2003 Up to 40 years Karyatidon 1, Agios Sylas Industrial Area (3rd), Limassol, Cyprus 1 — 1,935 131 2,066 173 2018 Up to 40 years 65 Egerton Road, Birmingham, England 1 — 6,980 1,871 8,851 5,284 2003 Up to 40 years Corby 278, Long Croft Road, Corby, England 1 — 20,486 5,433 25,919 1,056 2004 Up to 40 years Otterham Quay Lane, Gillingham, England 9 — 7,418 3,786 11,204 5,731 2004 Up to 40 years Pennine Way, Hemel Hempstead, England 1 — 10,847 6,902 17,749 7,551 2003 Up to 40 years Kemble Industrial Park, Kemble, England 2 — 5,277 7,422 12,699 9,082 2003 Up to 40 years Gayton Road, Kings Lynn, England 3 — 3,119 2,060 5,179 3,077 2003 Up to 40 years Cody Road, London, England 3 — 20,307 9,978 30,285 12,649 2003 Up to 40 years 17 Broadgate, Oldham, England 1 — 4,039 496 4,535 2,538 2008 Up to 40 years Harpway Lane, Sopley, England 1 — 681 1,519 2,200 1,497 2004 Up to 40 years Unit 1A Broadmoor Road, Swindom, England 1 — 2,636 588 3,224 1,326 2006 Up to 40 years Jeumont-Schneider, Champagne Sur Seine, France 3 — 1,750 2,881 4,631 2,590 2003 Up to 40 years Bat I-VII Rue de Osiers, Coignieres, France 4 — 21,318 1,177 22,495 5,376 2016 (4) Up to 40 years 26 Rue de I Industrie, Fergersheim, France 1 — 1,322 36 1,358 326 2016 (4) Up to 40 years Bat A, B, C1, C2, C3 Rue Imperiale, Gue de Longroi, France 1 — 3,390 1,087 4,477 1,177 2016 (4) Up to 40 years (A) (B) (C) (D) (E) (F) REGION/COUNTRY/ FACILITIES (1) ENCUMBRANCES INITIAL COST TO COMPANY (1) COST CAPITALIZED SUBSEQUENT TO ACQUISITION (1)(2) GROSS AMOUNT CARRIED AT CLOSE OF CURRENT PERIOD (1)(8) ACCUMULATED DEPRECIATION AT CLOSE OF CURRENT PERIOD (1)(8) DATE OF CONSTRUCTION OR ACQUIRED (3) LIFE ON WHICH Europe (continued) Le Petit Courtin Site de Dois, Gueslin, Mingieres, France 1 $ — $ 14,141 $ 1,025 $ 15,166 $ 2,558 2016 (4) Up to 40 years ZI des Sables, Morangis, France 1 277 12,407 17,744 30,151 21,152 2004 Up to 40 years 45 Rue de Savoie, Manissieux, Saint Priest, France 1 — 5,546 322 5,868 1,075 2016 (4) Up to 40 years Gutenbergstrabe 55, Hamburg, Germany 1 — 4,022 1,148 5,170 1,292 2016 (4) Up to 40 years Brommer Weg 1, Wipshausen, Germany 1 — 3,220 2,039 5,259 3,712 2006 Up to 40 years Warehouse and Offices 4 Springhill, Cork, Ireland 1 — 9,040 3,617 12,657 5,520 2014 Up to 40 years 17 Crag Terrace, Dublin, Ireland 1 — 2,818 1,075 3,893 1,556 2001 Up to 40 years Damastown Industrial Park, Dublin, Ireland 1 — 16,034 9,136 25,170 9,330 2012 Up to 40 years Portsmuiden 46, Amsterdam, The Netherlands 1 — 1,852 2,175 4,027 2,662 2015 (7) Up to 40 years Schepenbergweg 1, Amsterdam, The Netherlands 1 — 1,258 (600) 658 353 2015 (7) Up to 40 years Vareseweg 130, Rotterdam, The Netherlands 1 — 1,357 1,244 2,601 1,900 2015 (7) Up to 40 years Howemoss Drive, Aberdeen, Scotland 2 — 6,970 5,997 12,967 5,506 Various Up to 40 years Traquair Road, Innerleithen, Scotland 1 — 113 2,251 2,364 1,229 2004 Up to 40 years Nettlehill Road, Houston Industrial Estate, Livingston, Scotland 1 — 11,517 27,529 39,046 19,822 2001 Up to 40 years Av Madrid s/n Poligono Industrial Matillas, Alcala de Henares, Spain 1 — 186 270 456 367 2014 Up to 40 years Calle Bronce, 37, Chiloeches, Spain 1 — 11,011 3,540 14,551 3,734 2010 Up to 40 years Ctra M.118 , Km.3 Parcela 3, Madrid, Spain 1 — 3,981 6,751 10,732 7,128 2001 Up to 40 years Abanto Ciervava, Spain 2 — 1,053 11 1,064 504 Various Up to 40 years 57 $ 277 $ 231,658 $ 152,069 $ 383,727 $ 159,249 (A) (B) (C) (D) (E) (F) REGION/COUNTRY/ FACILITIES (1) ENCUMBRANCES INITIAL COST TO COMPANY (1) COST CAPITALIZED SUBSEQUENT TO ACQUISITION (1)(2) GROSS AMOUNT CARRIED AT CLOSE OF CURRENT PERIOD (1)(8) ACCUMULATED DEPRECIATION AT CLOSE OF CURRENT PERIOD (1)(8) DATE OF CONSTRUCTION OR ACQUIRED (3) LIFE ON WHICH Latin America Amancio Alcorta 2396, Buenos Aires, Argentina 2 $ — $ 655 $ 722 $ 1,377 $ 439 Various Up to 40 years Azara 1245, Buenos Aires, Argentina 1 — 166 (164) 2 — 1998 Up to 40 years Spegazzini, Ezeiza Buenos Aires, Argentina 1 — 12,773 (10,481) 2,292 520 2012 Up to 40 years Av Ernest de Moraes 815, Bairro Fim do Campo, Jarinu Brazil 1 — 12,562 (4,547) 8,015 1,514 2016 (4) Up to 40 years Rua Peri 80, Jundiai, Brazil 2 — 8,894 (3,358) 5,536 1,146 2016 (4) Up to 40 years Francisco de Souza e Melo, Rio de Janerio, Brazil 3 — 1,868 7,676 9,544 3,150 Various Up to 40 years Hortolandia, Sao Paulo, Brazil 1 — 24,078 (4,430) 19,648 3,332 2014 Up to 40 years El Taqueral 99, Santiago, Chile 5 — 2,629 34,428 37,057 12,808 Various Up to 40 years Panamericana Norte 18900, Santiago, Chile 5 — 4,001 19,606 23,607 8,310 2004 Up to 40 years Avenida Prolongacion 1 — 374 1,338 1,712 1,068 2002 Up to 40 years Privada Las Flores No. 25 (G3), Guadalajara, Mexico 1 — 905 1,188 2,093 1,016 2004 Up to 40 years Tula KM Parque de Las, Huehuetoca, Mexico 2 — 19,937 (1,421) 18,516 3,672 2016 (4) Up to 40 years Carretera Pesqueria Km2.5(M3), Monterrey, Mexico 2 — 3,537 4,462 7,999 3,749 2004 Up to 40 years Lote 2, Manzana A, (T2& T3), Toluca, Mexico 1 — 2,204 4,481 6,685 5,279 2002 Up to 40 years Prolongacion de la Calle 7 (T4), Toluca, Mexico 1 — 7,544 14,744 22,288 7,474 2007 Up to 40 years Panamericana Sur, KM 57.5, Lima, Peru 7 — 1,549 692 2,241 1,222 Various Up to 40 years Av. Elmer Faucett 3462, Lima, Peru 2 528 4,112 4,882 8,994 4,822 Various Up to 40 years Calle Los Claveles-Seccion 3, Lima, Peru 1 — 8,179 29,493 37,672 9,399 2010 Up to 40 years 39 $ 528 $ 115,967 $ 99,311 $ 215,278 $ 68,920 (A) (B) (C) (D) (E) (F) REGION/COUNTRY/ FACILITIES (1) ENCUMBRANCES INITIAL COST TO COMPANY (1) COST CAPITALIZED SUBSEQUENT TO ACQUISITION (1)(2) GROSS AMOUNT CARRIED AT CLOSE OF CURRENT PERIOD (1)(8) ACCUMULATED DEPRECIATION AT CLOSE OF CURRENT PERIOD (1)(8) DATE OF CONSTRUCTION OR ACQUIRED (3) LIFE ON WHICH Asia Warehouse No 4, Shanghai, China 1 $ — $ 1,530 $ 818 $ 2,348 $ 478 2013 Up to 40 years Jalan Karanggan Muda Raya No 59, Bogor Indonesia 1 — 7,897 4,902 12,799 2,714 2017 Up to 40 years 1 Serangoon North Avenue 6, Singapore 1 — 58,637 54,113 112,750 7,309 2018 (7) Up to 40 years 2 Yung Ho Road, Singapore 1 — 10,395 1,968 12,363 1,977 2016 (4) Up to 40 years 26 Chin Bee Drive, Singapore 1 — 15,699 3,009 18,708 2,986 2016 (4) Up to 40 years IC1 69 Moo 2, Soi Wat Namdaeng, Bangkok, Thailand 2 — 13,226 2,888 16,114 3,995 2016 (4) Up to 40 years 7 $ — $ 107,384 $ 67,698 $ 175,082 $ 19,459 Australia 8 Whitestone Drive, Austins Ferry, Australia 1 $ — $ 681 $ 2,850 $ 3,531 $ 519 2012 Up to 40 years 6 Norwich Street, South Launceston, Australia 1 — 1,090 17 1,107 123 2015 Up to 40 years 2 $ — $ 1,771 $ 2,867 $ 4,638 $ 642 Total 281 $ 805 $ 2,362,209 $ 1,468,280 $ 3,830,489 $ 1,097,616 (1) The above information only includes the real estate facilities that are owned. The gross cost includes the cost for land, land improvements, buildings, building improvements and racking. The listing does not reflect the 1,167 leased facilities in our real estate portfolio. In addition, the above information does not include any value for financing leases for property that is classified as land, buildings and building improvements in our consolidated financial statements. (2) Amount includes cumulative impact of foreign currency translation fluctuations. (3) Date of construction or acquired represents the date we constructed the facility or acquired the facility through purchase or acquisition. (4) Property was acquired in connection with our acquisition of Recall Holdings Limited. (5) Property was acquired in connection with the IODC Transaction. (6) Property was acquired in connection with the Credit Suisse Transaction. (7) This date represents the date the categorization of the property was changed from a leased facility to an owned facility. (8) The following tables present the changes in gross carrying amount of real estate owned and accumulated depreciation for the years ended December 31, 2020 and 2019: YEAR ENDED DECEMBER 31, GROSS CARRYING AMOUNT OF REAL ESTATE 2020 2019 Gross amount at beginning of period $ 3,856,515 $ 3,700,307 Additions during period: Discretionary capital projects 157,239 278,508 Other adjustments (1) 66,978 25,077 Foreign currency translation fluctuations 10,198 5,978 234,415 309,563 Deductions during period: Cost of real estate sold, disposed or written-down (178,869) (153,355) Other adjustments (2) (81,572) — (260,441) (153,355) Gross amount at end of period $ 3,830,489 $ 3,856,515 (1) For the year ended December 31, 2020, this includes previously recorded construction in progress, not classified as owned real estate at December 31, 2019. For the year ended December 31, 2019, this includes costs associated with real estate we acquired which primarily includes building improvements and racking, which were previously subject to leases. (2) For the year ended December 31, 2020, this includes the cost of racking associated with the facilities sold as part of the sale-leaseback transactions. YEAR ENDED DECEMBER 31, ACCUMULATED DEPRECIATION 2020 2019 Gross amount of accumulated depreciation at beginning of period $ 1,072,013 $ 1,011,050 Additions during period: Depreciation 123,447 122,366 Other adjustments (1) — 1,314 Foreign currency translation fluctuations 8,590 3,514 132,037 127,194 Deductions during period: Amount of accumulated depreciation for real estate assets sold, disposed or written-down (54,978) (66,231) Other adjustments (2) (51,456) — (106,434) (66,231) Gross amount of end of period $ 1,097,616 $ 1,072,013 (1) For the year ended December 31, 2019, this includes accumulated depreciation associated with building improvements and racking, which were previously subject to leases (2) For the year ended December 31, 2020, this includes the accumulated depreciation of racking associated with the facilities sold as part of the sale-leaseback transactions. The aggregate cost of our real estate assets for federal tax purposes at December 31, 2020 was approximately $3,769,000.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Principals of Consolidation	The accompanying financial statements reflect our financial position, results of operations, comprehensive income (loss), equity and cash flows on a consolidated basis. All intercompany transactions and account balances have been eliminated.
Use of Estimates	The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires us to make estimates, judgments and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities at the date of the financial statements and for the period then ended. On an ongoing basis, we evaluate the estimates used. We base our estimates on historical experience, actuarial estimates, current conditions and various other assumptions that we believe to be reasonable under the circumstances. These estimates form the basis for making judgments about the carrying values of assets and liabilities and are not readily apparent from other sources. Actual results may differ from these estimates.
Foreign Currency	Local currencies are the functional currencies for our operations outside the United States, with the exception of certain foreign holding companies, whose functional currency is the United States dollar. In those instances where the local currency is the functional currency, assets and liabilities are translated at period-end exchange rates, and revenues and expenses are translated at average exchange rates for the applicable period.
Cash, Cash Equivalents and Restricted Cash	Cash and cash equivalents include cash on hand and cash invested in highly liquid short-term securities, which have remaining maturities at the date of purchase of less than 90 days. Cash and cash equivalents are carried at cost, which approximates fair value.
Allowance for Doubtful Accounts and Credit Memo Reserves	We maintain an allowance for doubtful accounts and a credit memo reserve for estimated losses resulting from the potential inability of our customers to make required payments and potential disputes regarding billing and service issues. In June 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update ("ASU") No. 2016-13, Financial Instruments-Credit Losses-Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”). ASU 2016-13 changes how entities will measure credit losses on most financial assets. The standard eliminates the probable initial recognition of estimated losses and provides a forward-looking expected credit loss model for accounts receivable, loans and other financial instruments. On January 1, 2020 we adopted ASU 2016-13 on a modified retrospective basis for all financial assets measured at amortized cost. The adoption of ASU 2016-13 did not result in a material impact on our consolidated financial statements. Under ASU 2016-13, we calculate and monitor our allowance considering future potential economic and macroeconomic conditions and reasonable and supportable forecasts for expected future collectability of our outstanding receivables, in addition to considering our past loss experience, current and prior trends in our aged receivables and credit memo activity. Our considerations when calculating our allowance include, but are not limited to, the following: the location of our businesses, the composition of our customer base, our product and service lines, potential future economic unrest, and potential future macroeconomic factors, including natural disasters and any impacts associated with the COVID-19 pandemic. Continued adjustments will be made should there be any material change to reasonable and supportable forecasts that may impact our likelihood of collection, as it becomes evident. Our highly diverse global customer base, with no single customer accounting for more than 1% of revenue during the years ended December 31, 2020, 2019 and 2018, limits our exposure to concentration of credit risk. Additionally, we write off uncollectible balances as circumstances warrant, generally, no later than one year past due.
Concentrations of Credit Risk	Financial instruments that potentially subject us to credit risk consist principally of cash and cash equivalents (including money market funds and time deposits) and accounts receivable.As per our risk management investment policy, we limit exposure to concentration of credit risk by limiting the amount invested in any one mutual fund to a maximum of 1% of the fund's total assets or in any one financial institution to a maximum of $75,000.
Property, Plant and Equipment	Property, plant and equipment are stated at cost and depreciated using the straight-line method with the following useful lives (in years): DESCRIPTION RANGE Buildings and building improvements 5 to 40 Leasehold improvements 5 to 10 or life of the lease (whichever is shorter) Racking 1 to 20 or life of the lease (whichever is shorter) Warehouse equipment/vehicles 1 to 10 Furniture and fixtures 1 to 10 Computer hardware and software 2 to 5
Leases	We lease facilities for certain warehouses, data centers and office space. We also have land leases, including those on which certain facilities are located. The majority of our leased facilities are classified as operating leases that, on average, have initial lease terms of five one one We account for all leases, both operating and financing, in accordance with ASU No. 2016-02 Leases (Topic 842) , as amended ("ASU 2016-02") which we adopted on January 1, 2019 on a modified retrospective basis. We also adopted an accounting policy which provides that leases with an initial term of 12 months or less will not be included within the lease right-of-use assets and lease liabilities recognized on our Consolidated Balance Sheets after the adoption of ASU 2016-02. We will continue to recognize the lease payments for those leases with an initial term of 12 months or less in our Consolidated Statements of Operations on a straight-line basis over the lease term. The lease right-of-use assets and related lease liabilities are classified as either operating or financing. Lease right-of-use assets are calculated as the net present value of future payments plus any capitalized initial direct costs less any tenant improvements or lease incentives. Lease liabilities are calculated as the net present value of future payments. In calculating the present value of the lease payments, we utilize the rate stated in the lease (in the limited circumstances when such rate is explicitly stated) or, if no rate is explicitly stated, we utilize a rate that reflects our securitized incremental borrowing rate by geography for the lease term. We account for nonlease components (which include common area maintenance, taxes, and insurance) with the related lease component. Any variable nonlease components are not included within the lease right-of-use asset and lease liability on our Consolidated Balance Sheets, and instead, are reflected as an expense in the period incurred.
Long-Lived Assets	We review long-lived assets, including all finite-lived intangible assets, for impairment whenever events or changes in circumstances indicate the carrying amount of such assets may not be recoverable. Recoverability of these assets is determined by comparing the sum of the forecasted undiscounted net cash flows of the operation to which the assets relate to their carrying amount. The operations are generally distinguished by the business segment and geographic region in which they operate. If it is determined that we are unable to recover the carrying amount of the assets, the long-lived assets are written down, on a pro rata basis, to fair value. Fair value is determined based on discounted cash flows or appraised values, depending upon the nature of the assets. Long-lived assets, including finite-lived intangible assets, are amortized over their useful lives. Annually, or more frequently if events or circumstances warrant, we assess whether a change in the lives over which long-lived assets, including finite-lived intangible assets, are amortized is necessary.
Goodwill and Other Intangible Assets	Goodwill and intangible assets with indefinite lives are not amortized but are reviewed annually for impairment or more frequently if impairment indicators arise. Other than goodwill, we currently have no intangible assets that have indefinite lives and which are not amortized. We have selected October 1 as our annual goodwill impairment review date. We have performed our annual goodwill impairment review as of October 1, 2020, 2019 and 2018. We concluded that as of October 1, 2020, 2019 and 2018, goodwill was not impaired. During the first quarter of 2020, as discussed in greater detail below, we concluded that we had a triggering event related to our Fine Arts reporting unit, requiring us to perform an interim goodwill impairment test. We concluded that the fair value of our Fine Arts reporting unit was less than its carrying value, and, therefore, we recorded a $23,000 impairment charge on the goodwill associated with this reporting unit during the first quarter of 2020. The following is a discussion regarding (i) the reporting units at which level we tested goodwill for impairment as of October 1, 2019, (ii) changes to the composition of our reporting units between October 1, 2019 and December 31, 2019, (iii) interim goodwill impairment review for our Fine Arts reporting unit during the first quarter of 2020 and (iv) the reporting units at which level we tested goodwill for impairment as of October 1, 2020 and the composition of these reporting units at December 31, 2020 (including the amount of goodwill associated with each reporting unit). When changes occur in the composition of one or more reporting units, the goodwill is reassigned to the reporting units affected based upon their relative fair values. GOODWILL IMPAIRMENT ANALYSIS - 2019 I. REPORTING UNITS AS OF OCTOBER 1, 2019 Our reporting units at which level we performed our goodwill impairment analysis as of October 1, 2019 were as follows: • North American Records and Information Management • North American Data Management • Fine Arts • Entertainment Services • Western Europe • Northern/Eastern Europe and Middle East and India (“NEE and MEI”) • Latin America • Australia, New Zealand and South Africa (“ANZ SA”) • Asia • Global Data Center We concluded that the goodwill associated with each of our reporting units was not impaired as of such date. II. CHANGES TO COMPOSITION OF REPORTING UNITS BETWEEN OCTOBER 1, 2019 AND DECEMBER 31, 2019 During the fourth quarter of 2019, as a result of the realignment of our global managerial structure and changes to our internal financial reporting associated with Project Summit, we reassessed the composition of our reportable operating segments (see Note 10 for a description and definitions of our reporting operating segments) as well as our reporting units. We noted the following changes to our reporting units: • our former North American Records and Information Management (excluding our technology escrow services business) and North American Data Management reporting units are now being managed as our “North America RIM” reporting unit; • our former Western Europe and NEE and MEI reporting units (excluding India) and our business in Africa, which was previously managed as a component of our former ANZ SA reporting unit, is now being managed together as our “Europe RIM” reporting unit; • our business in India, which was previously managed as a component of our former NEE and MEI reporting unit, is now being managed in conjunction with our businesses in Asia as our “Asia RIM” reporting unit; • our former ANZ SA reporting unit will no longer include South Africa and will be referred to as our “Australia and New Zealand RIM” (“ANZ RIM”) reporting unit; and • our technology escrow services business is now being managed separately as our “Technology Escrow Services” reporting unit. 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED) There were no changes to our Global Data Center, Fine Arts, Entertainment Services and Latin America RIM reporting units. We concluded that the goodwill associated with our North America RIM, Europe RIM, ANZ RIM, Asia RIM and Technology Escrow Services reporting units were not impaired following this change in reporting units. Reporting unit valuations have generally been determined using a combined approach based on the present value of future cash flows (the “Discounted Cash Flow Model”) and market multiples (the “Market Approach”). The Discounted Cash Flow Model incorporates significant assumptions including future revenue growth rates, operating margins, discount rates and capital expenditures. The Market Approach requires us to make assumptions related to Adjusted EBITDA (as defined in Note 10) multiples. Changes in economic and operating conditions impacting these assumptions or changes in multiples could result in goodwill impairments in future periods. In conjunction with our annual goodwill impairment reviews, we reconcile the sum of the valuations of all of our reporting units to our market capitalization as of such dates.
Finite-Lived Intangible Assets and Liabilities	FINITE-LIVED INTANGIBLE ASSETS AND LIABILITIES I. CUSTOMER RELATIONSHIP INTANGIBLE ASSETS Customer relationship intangible assets, which are acquired through either business combinations or acquisitions of customer relationships, are amortized over periods ranging from 10 to 30 years. Customer relationship intangible assets are recorded based upon estimates of their fair value. Finite-lived intangible assets associated with our Global Data Center Business consist of the following: DATA CENTER IN-PLACE LEASE INTANGIBLE ASSETS AND DATA CENTER TENANT RELATIONSHIP INTANGIBLE ASSETS Data Center In-Place Lease Intangible Assets (“Data Center In-Place Leases”) and Data Center Tenant Relationship Intangible Assets (“Data Center Tenant Relationships”) reflect the value associated with acquiring a data center operation with active tenants as of the date of acquisition. The value of Data Center In-Place Leases is determined based upon an estimate of the economic costs (such as lost revenues, tenant improvement costs, commissions, legal expenses and other costs to acquire new data center leases) avoided by acquiring a data center operation with active tenants that would have otherwise been incurred if the data center operation was purchased vacant. Data Center In-Place Leases are amortized over the weighted average remaining term of the acquired data center leases. The value of Data Center Tenant Relationships is determined based upon an estimate of the economic costs avoided upon lease renewal of the acquired tenants, based upon expectations of lease renewal. Data Center Tenant Relationships are amortized over the weighted average remaining anticipated life of the relationship with the acquired tenant. DATA CENTER ABOVE-MARKET AND BELOW-MARKET IN-PLACE LEASE INTANGIBLE ASSETS We record Data Center Above-Market In-Place Lease Intangible Assets (“Data Center Above-Market Leases”) and Data Center Below-Market In-Place Lease Intangible Assets (“Data Center Below-Market Leases”) at the net present value of the difference between (i) the contractual amounts to be paid pursuant to each in-place lease and (ii) management’s estimate of the fair market lease rates for each corresponding in-place lease. Data Center Above-Market Leases and Data Center Below-Market Leases are amortized over the remaining non-cancellable term of the acquired in-place lease to storage revenue.
Deferred Financing Costs	Deferred financing costs are amortized over the life of the related debt. If debt is retired early, the related unamortized deferred financing costs are written-off in the period the debt is retired to Other expense (income), net.
Derivatives Instruments and Hedging Activities	Every derivative instrument is required to be recorded in the balance sheet as either an asset or a liability measured at its fair value. Periodically, we acquire derivative instruments that are intended to hedge either cash flows or values that are subject to foreign exchange or other market price risk and not for trading purposes. We have formally documented our hedging relationships, including identification of the hedging instruments and the hedged items, as well as our risk management objectives and strategies for undertaking each hedge transaction. Given the recurring nature of our revenues and the long-term nature of our asset base, we have the ability and the preference to use long-term, fixed interest rate debt to finance our business, thereby preserving our long-term returns on invested capital. We may use interest rate swaps as a tool to maintain our targeted level of fixed rate debt. In addition, we may enter into cross-currency swaps to hedge the variability of exchange rates between the United States and our foreign subsidiaries, as well as interest rates. We may also use borrowings in foreign currencies, either obtained in the United States or by our foreign subsidiaries, to hedge foreign currency risk associated with our international investments.
Fair Value Measurements	Entities are permitted under GAAP to elect to measure certain financial instruments and certain other items at either fair value or cost. We have elected the cost measurement option in all circumstances where we had an option. Our financial assets or liabilities that are carried at fair value are required to be measured using inputs from the three levels of the fair value hierarchy. A financial asset or liability’s classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement. The three levels of the fair value hierarchy are as follows: Level 1—Inputs are unadjusted quoted prices in active markets for identical assets or liabilities that we have the ability to access at the measurement date. Level 2—Inputs include quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (i.e., interest rates, yield curves, etc.), and inputs that are derived principally from or corroborated by observable market data by correlation or other means (market corroborated inputs).
Redeemable Noncontrolling Interests	Certain unaffiliated third parties own noncontrolling interests in certain of our foreign consolidated subsidiaries. The underlying agreements between us and our noncontrolling interest shareholders for these subsidiaries contain provisions under which the noncontrolling interest shareholders can require us to purchase their respective interests in such subsidiaries at certain times and at a purchase price as stipulated in the underlying agreements (generally at fair value). These put options make these noncontrolling interests redeemable and, therefore, these noncontrolling interests are classified as temporary equity outside of stockholders’ equity. Redeemable noncontrolling interests are reported at the higher of their redemption value or the noncontrolling interest holders’ proportionate share of the underlying subsidiaries net carrying value. Increases or decreases in the redemption value of the noncontrolling interest are offset against Additional Paid-in Capital.
Revenues	Payments that are made to a customer’s current records management vendor in order to terminate the customer’s existing contract with that vendor (“Permanent Withdrawal Fees”), or direct payments to a customer for which no distinct benefit is received in return, are collectively referred to as "Customer Inducements". Customer Inducements are treated as a reduction of the transaction price over periods ranging from one Our revenues consist of storage rental revenues as well as service revenues and are reflected net of sales and value-added taxes. Storage rental revenues, which are considered a key driver of financial performance for the storage and information management services industry, consist primarily of recurring periodic rental charges related to the storage of materials or data (generally on a per unit basis) that are typically retained by customers for many years and revenues associated with our data center operations. Service revenues include charges for related service activities, the most significant of which include: (1) the handling of records, including the addition of new records, temporary removal of records from storage, refiling of removed records, customer termination and permanent removal fees, project revenues and courier operations, consisting primarily of the pickup and delivery of records upon customer request; (2) destruction services, consisting primarily of secure shredding of sensitive documents and the subsequent sale of shredded paper for recycling, the price of which can fluctuate from period to period; and (3) digital solutions including scanning, imaging and document conversion services of active and inactive records, and consulting services. We account for revenue in accordance with ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU 2014-09”). Customers are generally billed monthly based on contractually agreed-upon terms, and storage rental and service revenues are recognized in the month the respective storage rental or service is provided, in line with the transfer of control to the customer. When storage rental fees or services are billed in advance, amounts related to future storage rental or prepaid service contracts are accounted for as deferred revenue and recognized upon the transfer of control to the customer, generally ratably over the contract term. Customer contracts generally include promises to provide monthly recurring storage and related services that are essentially the same over time and have the same pattern of transfer of control to the customer; therefore, most performance obligations represent a promise to deliver a series of distinct services over time (as determined for purposes of ASU 2014-09, a “series”). For those contracts that qualify as a series, we have a right to consideration from the customer in an amount that corresponds directly with the value of the underlying performance obligation transferred to the customer to date. This concept is known as "right to invoice” and we apply the “right to invoice” practical expedient to all revenues, with the exception of storage revenues in our Global Data Center Business (which are subject to leasing guidance). Additionally, each purchasing decision is fully in the control of the customer and; therefore, consideration beyond the current reporting period is variable and allocated to the specific period to which the consideration relates, which is consistent with the practical expedient. Our Global Data Center Business features storage rental provided to the customer at contractually specified rates over a fixed contractual period. Storage rental revenue related to the storage component of our Global Data Center Business is recognized on a straight-line basis over the contract term in accordance with ASU 2016-02. The revenue related to the service component of our Global Data Center Business is recognized in the period the related services are provided. 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 (“Contract Fulfillment Costs”). The following describes each of these Contract Fulfillment Costs recognized under ASU 2014-09: INTAKE COSTS (AND ASSOCIATED DEFERRED REVENUE) The costs of the initial intake of customer records into physical storage (“Intake Costs”) are deferred and amortized as a component of depreciation and amortization in our Consolidated Statements of Operations over three years, consistent with the transfer of the performance obligation to the customer to which the asset relates. In instances where such Intake Costs are billed to the customer, the associated revenue is deferred and recognized over the same three-year period. COMMISSIONS Certain commission payments that are directly associated with the fulfillment of long-term storage contracts are capitalized and amortized as a component of depreciation and amortization in our Consolidated Statements of Operations over three years, consistent with the transfer of the performance obligation to the customer to which the asset relates. Certain direct commission payments associated with contracts with a duration of one year or less are expensed as incurred under the practical expedient which allows an entity to expense as incurred an incremental cost of obtaining a contract if the amortization period of the asset that the entity otherwise would have recognized is one year or less.
Stock-Based Compensation	We record stock-based compensation expense, utilizing the straight-line method, for the cost of stock options, restricted stock units (“RSUs”), performance units (“PUs”) and shares of stock issued under our employee stock purchase plan (“ESPP”) (together, "Employee Stock-Based Awards”). For our Employee Stock-Based Awards made on or after February 20, 2019, we have included the following retirement provision: • Upon an employee’s retirement on or after attaining age 58, if the sum of (i) the award recipient’s age at retirement and (ii) the award recipient’s years of service with the company totals at least 70, the award recipient is entitled to continued vesting of any outstanding Employee Stock-Based Awards which include the 2019 Retirement Criteria subsequent to their retirement, provided that, for awards granted in the year of retirement, their retirement occurs on or after July 1 (the “2019 Retirement Criteria”). • Accordingly, (i) grants of Employee Stock-Based Awards to an employee who has met the 2019 Retirement Criteria on or before the date of grant, or will meet the Retirement Criteria before July 1 of the year of the grant, will be expensed between the date of grant and July 1 of the grant year and (ii) grants of Employee Stock-Based Awards to employees who will meet the 2019 Retirement Criteria during the award’s normal vesting period will be expensed between the date of grant and the date upon which the award recipient meets the 2019 Retirement Criteria. • Stock options and RSUs granted to recipients who meet the 2019 Retirement Criteria will continue vesting on the original vesting schedule. If an employee retires and has met the 2019 Retirement Criteria, stock options will remain exercisable for up to three years or the original expiration date of the stock options, if earlier. PUs granted to recipients who meet the 2019 Retirement Criteria will continue to vest and be delivered in accordance with the original vesting schedule of the applicable PU award and remain subject to the same performance conditions. The substantial majority of stock-based compensation expense for Employee Stock-Based Awards is included in Selling, general and administrative expenses in the accompanying Consolidated Statements of Operations. STOCK OPTIONS Options are generally granted with exercise prices equal to the market price of the stock on the date of grant; however, in certain instances, options are granted at prices greater than the market price of the stock on the date of grant. The substantial majority of options we issue become exercisable ratably over a period three years from the date of grant and have a contractual life of 10 years from the date of grant, unless the holder’s employment is terminated sooner. Our non-employee directors are considered employees for purposes of our stock option plans and stock option reporting. The substantial majority of the stock options outstanding at December 31, 2020 are based on the three-year vesting period (10 year contractual life) described above. Our equity compensation plans generally provide that, upon a vesting change in control (as defined in each plan), any unvested options and other awards granted thereunder shall vest immediately if an employee is terminated as a result of the change in control or terminates their own employment for good reason (as defined in each plan). On January 20, 2015, our stockholders approved the adoption of the Iron Mountain Incorporated 2014 Stock and Cash Incentive Plan, as amended (the "2014 Plan”). Under the 2014 Plan, the total amount of shares of common stock reserved and available for issuance pursuant to awards granted under the 2014 Plan is 12,750,000. The 2014 Plan permits us to continue to grant awards through May 24, 2027. (2) Risk-free interest rate is based on the United States Treasury interest rates whose term is consistent with the expected life (estimated period of time outstanding) of the stock options. (3) Expected dividend yield is considered in the option pricing model and represents our current annualized expected per share dividends over the current trade price of our common stock. (4) Expected life of the stock options granted is estimated using the historical exercise behavior of employees. All of our PUs will be settled in shares of our common stock and are subject to cliff vesting three years from the date of the original PU grant. As detailed above, PUs granted: • On or after February 20, 2019, are subject to the 2019 Retirement Criteria. PUs granted to recipients who meet the 2019 Retirement Criteria will continue to vest and be delivered in accordance with the original vesting schedule of the applicable PU award and remain subject to the same performance conditions. • Prior to February 20, 2019, employees who terminate their employment during the three-year performance period and on or after attaining age 55 and completing 10 years of qualifying service are eligible for pro-rated vesting, subject to the actual achievement against the predefined targets or a market condition as discussed above, based on the number of full years of service completed following the grant date (but delivery of the shares remains deferred). As a result, PUs are generally expensed over the three-year performance period. All PUs accrue dividend equivalents associated with the underlying stock as we declare dividends. Dividends will generally be paid to holders of PUs in cash upon the settlement date of the associated PU and will be forfeited if the PU does not vest.
Income Taxes	Accounting for income taxes requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of temporary differences between the tax and financial reporting bases of assets and liabilities and for loss and credit carryforwards. Valuation allowances are provided when recovery of deferred tax assets does not meet the more likely than not standard as defined in GAAP. We have elected to recognize interest and penalties associated with uncertain tax positions as a component of the Provision (benefit) for income taxes in the accompanying Consolidated Statements of Operations.We have been organized and have operated as a REIT effective beginning with our taxable year that ended on December 31, 2014. As a REIT, we are generally permitted to deduct from our federal taxable income the dividends we pay to our stockholders. The income represented by such dividends is not subject to federal taxation at the entity level but is taxed, if at all, at the stockholder level. The income of our domestic taxable REIT subsidiaries (“TRSs”), which hold our domestic operations that may not be REIT-compliant as currently operated and structured, is subject, as applicable, to federal and state corporate income tax. In addition, we and our subsidiaries continue to be subject to foreign income taxes in other jurisdictions in which we have business operations or a taxable presence, regardless of whether assets are held or operations are conducted through subsidiaries disregarded for federal income tax purposes or TRSs. We will also be subject to a separate corporate income tax on any gains recognized on the sale or disposition of any asset previously owned by a C corporation during a five-year period after the date we first owned the asset as a REIT asset that are attributable to “built-in gains” with respect to that asset on that date. We will also be subject to a built-in gains tax on our depreciation recapture recognized into income as a result of accounting method changes in connection with our acquisition activities. If we fail to remain qualified for taxation as a REIT, we will be subject to federal income tax at regular corporate income tax rates. Even if we remain qualified for taxation as a REIT, we may be subject to some federal, state, local and foreign taxes on our income and property in addition to taxes owed with respect to our TRS operations. In particular, while state income tax regimes often parallel the federal income tax regime for REITs, many states do not completely follow federal rules and some do not follow them at all.The evaluation of an uncertain tax position is a two-step process. The first step is a recognition process whereby we determine whether it is more likely than not that a tax position will be sustained upon examination, including resolution of any related appeals or litigation processes, based on the technical merits of the position. The second step is a measurement process whereby a tax position that meets the more likely than not recognition threshold is calculated to determine the amount of benefit to recognize in the financial statements. The tax position is measured as the largest amount of benefit that is greater than 50% likely of being realized upon ultimate settlement.We have elected to recognize interest and penalties associated with uncertain tax positions as a component of the provision (benefit) for income taxes in the accompanying Consolidated Statements of Operations.
Income (Loss) Per Share-Basic and Diluted	Basic income (loss) per common share is calculated by dividing income (loss) by the weighted average number of common shares outstanding. The calculation of diluted income (loss) per share is consistent with that of basic income (loss) per share but gives effect to all potential common shares (that is, securities such as stock options, RSUs, PUs, warrants or convertible securities) that were outstanding during the period, unless the effect is antidilutive.
New Accounting Pronouncements	In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement (“ASU 2018-13”), which makes a number of changes meant to add, modify or remove certain disclosure requirements associated with the movement of our financial assets and liabilities among the three levels of the fair value hierarchy. We adopted ASU 2018-13 on January 1, 2020. ASU 2018-13 did not have a material impact on our consolidated financial statements. OTHER AS YET ADOPTED ACCOUNTING PRONOUNCEMENTS In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (Topic 848) (“ASU 2020-04”). ASU 2020-04 provides optional expedients and exceptions for applying U.S. GAAP to contracts, hedging relationships, and other transactions, for a limited period of time, to ease the potential burden of recognizing the effects of reference rate reform on financial reporting. The amendments in ASU 2020-04 apply to contracts, hedging relationships and other transactions that reference the London Inter-Bank Offered Rate (“LIBOR”) or another reference rate expected to be discontinued due to the global transition away from LIBOR and certain other interbank offered rates. An entity may elect to apply the amendments provided by ASU 2020-04 beginning March 12, 2020 through December 31, 2022. We are currently evaluating these amendments as they relate to our contracts, hedging relationships and other transactions that reference LIBOR, as well as the impact of ASU 2020-04 on our consolidated financial statements. In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740) (“ASU 2019-12”). ASU 2019-12 simplifies the accounting for income taxes by removing certain exceptions for recognizing deferred taxes for investments, performing intra-period allocation and calculating income taxes in interim periods. ASU 2019-12 also adds guidance to reduce complexity in certain areas, including recognizing deferred taxes for tax goodwill and allocating taxes to members of a consolidated group. ASU 2019-12 is effective for us on January 1, 2021. We do not expect that ASU 2019-12 will have a material impact on our consolidated financial statements.
Acquisitions	ACQUISITIONS We account for acquisitions using the acquisition method of accounting, and, accordingly, the assets and liabilities acquired are recorded at their estimated fair values and the results of operations for each acquisition have been included in our consolidated results from their respective acquisition dates.
Commitments and Contingencies	We are involved in litigation from time to time in the ordinary course of business, including litigation arising from damage to customer assets in our facilities caused by fires and other natural disasters. A portion of the defense and/or settlement costs associated with such litigation is covered by various commercial liability insurance policies purchased by us and, in limited cases, indemnification from third parties. Our policy is to establish reserves for loss contingencies when the losses are both probable and reasonably estimable. We record legal costs associated with loss contingencies as expenses in the period in which they are incurred.
Segment Information	The accounting policies of the reportable segments are the same as those described in Note 2. During the fourth quarter of 2020, we changed our definition of Adjusted EBITDA to (a) exclude stock-based compensation expense and (b) include our share of Adjusted EBITDA from our unconsolidated joint ventures. All prior periods have been recast to conform to these changes. We now define Adjusted EBITDA for each segment as income (loss) from continuing operations before interest expense, net, provision (benefit) for income taxes, depreciation and amortization (inclusive of our share of Adjusted EBITDA from our unconsolidated joint ventures), and excluding certain items we do not believe to be indicative of our core operating results, specifically: EXCLUDED • Significant Acquisition Costs • Restructuring Charges • Intangible impairments • (Gain) loss on disposal/write-down of property, plant and equipment, net (including real estate) • Other expense (income), net • Stock-based compensation expense • COVID-19 Costs (as defined below) Internally, we use Adjusted EBITDA as the basis for evaluating the performance of, and allocated resources to, our operating segments.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2020
Accounting Policies [Abstract]
Roll forward of allowance for doubtful accounts and credit memo reserves	Rollforward of allowance for doubtful accounts and credit memo reserves is as follows: YEAR ENDED DECEMBER 31, BALANCE AT BEGINNING OF THE YEAR CREDIT MEMOS CHARGED TO REVENUE ALLOWANCE FOR BAD DEBTS CHARGED TO EXPENSE DEDUCTIONS AND OTHER (1) BALANCE AT 2020 $ 42,856 $ 55,118 $ 34,411 $ (75,404) $ 56,981 2019 43,584 51,846 19,389 (71,963) 42,856 2018 46,648 36,329 18,625 (58,018) 43,584 (1) Primarily consists of the issuance of credit memos, the write-off of accounts receivable and the impact associated with currency translation adjustments.
Components of prepaid expenses	Accrued expenses, with items greater than 5% of total current liabilities are shown separately, and consist of the following: DECEMBER 31, DESCRIPTION 2020 2019 Interest $ 131,448 $ 97,987 Sales tax and VAT payable 131,780 115,352 Dividends 187,867 186,021 Operating lease liabilities 250,239 223,249 Other 444,954 339,143 Accrued expenses $ 1,146,288 $ 961,752
Property, Plant and Equipment at cost	Property, plant and equipment are stated at cost and depreciated using the straight-line method with the following useful lives (in years): DESCRIPTION RANGE Buildings and building improvements 5 to 40 Leasehold improvements 5 to 10 or life of the lease (whichever is shorter) Racking 1 to 20 or life of the lease (whichever is shorter) Warehouse equipment/vehicles 1 to 10 Furniture and fixtures 1 to 10 Computer hardware and software 2 to 5 Property, plant and equipment (including financing leases in the respective category), at cost, consist of the following: DECEMBER 31, DESCRIPTION 2020 2019 Land $ 354,395 $ 448,566 Buildings and building improvements 3,040,253 3,029,309 Leasehold improvements 969,273 852,022 Racking 2,083,199 2,040,832 Warehouse equipment/vehicles 499,787 483,218 Furniture and fixtures 52,978 54,275 Computer hardware and software 746,993 689,261 Construction in progress 499,459 451,423 Property, plant and equipment $ 8,246,337 $ 8,048,906
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 December 31, 2020 and 2019 are as follows: DECEMBER 31, DESCRIPTION 2020 2019 Assets: Operating lease right-of-use assets (1) $ 2,196,502 $ 1,869,101 Financing lease right-of-use assets, net of accumulated depreciation (2)(3) 310,534 327,215 Liabilities: Current Operating lease liabilities $ 250,239 $ 223,249 Financing lease liabilities (3) 43,149 46,582 Long-term Operating lease liabilities 2,044,598 1,728,686 Financing lease liabilities (3) 323,162 320,600 (1) At December 31, 2020 and 2019, these assets are comprised of approximately 99% real estate related assets (which include land, buildings and racking) and 1% non-real estate related assets (which include warehouse equipment, vehicles, furniture and fixtures and computer hardware and software). (2) At December 31, 2020, these assets are comprised of approximately 72% real estate related assets and 28% non-real estate related assets. At December 31, 2019, these assets are comprised of approximately 69% real estate related assets and 31% non-real estate related assets. (3) 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 Consolidated Balance Sheets.
Schedule of lease terms and discount rates/Other lease information	The components of the lease expense for the years ended December 31, 2020 and 2019 are as follows: YEAR ENDED DECEMBER 31, DESCRIPTION 2020 2019 Operating lease cost (1) $ 499,464 $ 459,619 Financing lease cost: Depreciation of financing lease right-of-use assets $ 51,629 $ 59,258 Interest expense for financing lease liabilities 19,942 21,031 Weighted average remaining lease terms and discount rates as of December 31, 2020 and 2019 are as follows: DECEMBER 31, 2020 DECEMBER 31, 2019 OPERATING LEASES FINANCING LEASES OPERATING LEASES FINANCING LEASES Remaining Lease Term 11.1 years 11.5 years 11.0 years 11.6 years Discount Rate 6.9 % 5.9 % 7.1 % 5.7 % YEAR ENDED DECEMBER 31, CASH PAID FOR AMOUNTS INCLUDED IN MEASUREMENT OF LEASE LIABILITIES: 2020 2019 Operating cash flows used in operating leases $ 360,088 $ 338,059 Operating cash flows used in financing leases (interest) 19,942 21,031 Financing cash flows used in financing leases 47,829 58,033 NON-CASH ITEMS: Operating lease modifications and reassessments $ 143,382 $ 108,023 New operating leases (including acquisitions and sale-leaseback transactions) 370,011 170,464
Operating lease maturity table	The estimated minimum future lease payments as of December 31, 2020, are as follows: YEAR OPERATING LEASES (1) SUBLEASE INCOME FINANCING LEASES (1) 2021 $ 380,607 $ (6,208) $ 62,669 2022 362,970 (5,752) 54,499 2023 334,893 (5,222) 45,557 2024 307,039 (3,771) 38,051 2025 281,487 (1,661) 32,261 Thereafter 1,687,706 (6,229) 268,542 Total minimum lease payments 3,354,702 $ (28,843) 501,579 Less amounts representing interest or imputed interest (1,059,865) (135,268) Present value of lease obligations $ 2,294,837 $ 366,311
Finance lease maturity table	The estimated minimum future lease payments as of December 31, 2020, are as follows: YEAR OPERATING LEASES (1) SUBLEASE INCOME FINANCING LEASES (1) 2021 $ 380,607 $ (6,208) $ 62,669 2022 362,970 (5,752) 54,499 2023 334,893 (5,222) 45,557 2024 307,039 (3,771) 38,051 2025 281,487 (1,661) 32,261 Thereafter 1,687,706 (6,229) 268,542 Total minimum lease payments 3,354,702 $ (28,843) 501,579 Less amounts representing interest or imputed interest (1,059,865) (135,268) Present value of lease obligations $ 2,294,837 $ 366,311
Schedule of carrying value of goodwill, net for each of the reporting units	The carrying value of goodwill, net for each of our reporting units described above as of December 31, 2019 is as follows: SEGMENT REPORTING UNIT CARRYING VALUE AS OF DECEMBER 31, 2019 Global RIM (as defined in Note 10) Business North America RIM $ 2,715,550 Europe RIM 572,482 Latin America RIM 140,897 ANZ RIM 274,913 Asia RIM 239,059 Global Data Center Business Global Data Center 424,568 Corporate and Other Business Fine Arts 37,533 Entertainment Services 34,102 Technology Escrow Services 46,105 Total $ 4,485,209 The carrying value of goodwill, net for each of our reporting units described above as of December 31, 2020 is as follows: SEGMENT REPORTING UNIT CARRYING VALUE AS OF DECEMBER 31, 2020 Global RIM Business North America RIM $ 2,719,182 Europe RIM 641,621 Latin America RIM 117,834 ANZ RIM 301,251 Asia RIM 244,294 Global Data Center Business Global Data Center 436,987 Corporate and Other Business Fine Arts 15,176 Entertainment Services 35,159 Technology Escrow Services 46,105 Total $ 4,557,609
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 years ended December 31, 2020 and 2019 are as follows: GLOBAL RIM GLOBAL DATA CENTER BUSINESS CORPORATE AND OTHER BUSINESS TOTAL CONSOLIDATED Goodwill balance, net of accumulated amortization, as of December 31, 2018 $ 3,899,210 $ 425,956 $ 115,864 $ 4,441,030 Tax deductible goodwill acquired during the year 16,450 — — 16,450 Non-tax deductible goodwill acquired during the year 11,228 — 1,904 13,132 Fair value and other adjustments 4,439 258 (417) 4,280 Currency effects 11,574 (1,646) 389 10,317 Goodwill balance, net of accumulated amortization, as of December 31, 2019 3,942,901 424,568 117,740 4,485,209 Non-tax deductible goodwill acquired during the year 54,258 — — 54,258 Goodwill impairment — — (23,000) (23,000) Fair value and other adjustments (3,815) — 403 (3,412) Currency effects 30,838 12,419 1,297 44,554 Goodwill balance, net of accumulated amortization, as of December 31, 2020 $ 4,024,182 $ 436,987 $ 96,440 $ 4,557,609 Accumulated Goodwill Impairment Balance as of December 31, 2019 $ 132,409 $ — $ 3,011 $ 135,420 Accumulated Goodwill Impairment Balance as of December 31, 2020 $ 132,409 $ — $ 26,011 $ 158,420
Components of Gain/Loss on Sale/Disposal of Property, Plant and Equipment	YEAR ENDED DECEMBER 31, 2020 2019 2018 Consolidated gain on disposal/write-down of property, plant and equipment, net $ 363,537 $ 63,824 $ 73,622 The gains primarily consisted of: • Gains associated with sale-leaseback transactions of approximately $342,100, of which (i) approximately $265,600 relates to the sale-leaseback transactions of 14 facilities in the United States during the fourth quarter of 2020 and (ii) approximately $76,400 relates to the sale-leaseback transactions of two facilities in the United States during the third quarter of 2020, each as part of our program to monetize a small portion of our industrial real estate assets. The terms for these leases are consistent with the terms of our lease portfolio, which are disclosed in Note 2.i. • Gains of approximately $24,100 associated with the Frankfurt JV Transaction (as defined in Note 3) • Gains associated with sale and sale-leaseback transactions of approximately $67,800 in the United States • The sale of certain land and buildings of approximately $36,000 in the United Kingdom Partially offset by losses from: • The impairment charge on the assets associated with the select offerings within our Iron Mountain Iron Cloud ("Iron Cloud") portfolio and loss on the subsequent sale of certain IT infrastructure assets and rights to certain hardware and maintenance contracts used to deliver these Iron Cloud offerings of approximately $25,000. • The write-down of certain property, plant and equipment of approximately $15,700 in the United States. • Gain on sale of real estate of approximately $63,800 in the United Kingdom • Gains associated with the involuntary conversion of assets included in a facility that we own in Argentina partially destroyed in a fire in 2014, of approximately $8,800 during the fourth quarter of 2018
Schedule of amortization expenses	Amortization expense associated with finite-lived intangible assets, revenue reduction associated with the amortization of Customer Inducements and net revenue reduction associated with the amortization of Data Center Above-Market Leases and Data Center Below-Market Leases for the years ended December 31, 2020, 2019 and 2018 is as follows: YEAR ENDED DECEMBER 31, 2020 2019 2018 Amortization expense included in depreciation and amortization associated with: Customer relationship intangible assets $ 117,514 $ 117,972 $ 113,782 Data center in-place leases and tenant relationships 42,637 46,696 43,061 Third-party commissions asset and other finite-lived intangible assets 7,004 7,957 5,713 Revenue reduction associated with amortization of: Customer inducements and data center above-market and below-market leases $ 9,878 $ 13,703 $ 16,281
Estimated amortization expense for existing intangible assets for the next five succeeding fiscal years	Estimated amortization expense for existing finite-lived intangible assets (excluding Contract Fulfillment Costs, as defined and disclosed in Note 2.r.) is as follows: ESTIMATED AMORTIZATION YEAR INCLUDED IN DEPRECIATION REVENUE REDUCTION ASSOCIATED WITH CUSTOMER INDUCEMENTS 2021 $ 168,756 $ 7,603 2022 139,983 5,010 2023 135,262 3,084 2024 130,298 1,453 2025 127,771 508 Thereafter 625,052 842
Assets and liabilities carried at fair value measured on a recurring basis	The assets and liabilities carried at fair value and measured on a recurring basis as of December 31, 2020 and 2019, respectively, are as follows: FAIR VALUE MEASUREMENTS AT DECEMBER 31, 2020 USING DESCRIPTION TOTAL CARRYING QUOTED PRICES IN SIGNIFICANT OTHER SIGNIFICANT Money Market Funds (1) $ 62,657 $ — $ 62,657 $ — Time Deposits (1) 2,121 — 2,121 — Trading Securities 10,892 10,636 (2) 256 (3) — Derivative Liabilities (4) 49,703 — 49,703 — FAIR VALUE MEASUREMENTS AT DECEMBER 31, 2019 USING DESCRIPTION TOTAL CARRYING QUOTED PRICES IN SIGNIFICANT OTHER SIGNIFICANT Money Market Funds (1) $ 13,653 $ — $ 13,653 $ — Trading Securities 10,732 10,168 (2) 564 (3) — Derivative Liabilities (4) 9,756 — 9,756 — (1) Money market funds and time deposits are measured based on quoted prices for similar assets and/or subsequent transactions. (2) Certain trading securities are measured at fair value using quoted market prices. (3) Certain trading securities are measured based on inputs other than quoted market prices that are observable.
Schedule of changes in accumulated other comprehensive items, net	The changes in accumulated other comprehensive items, net for the years ended December 31, 2020, 2019 and 2018 are as follows: FOREIGN CURRENCY TRANSLATION AND OTHER ADJUSTMENTS CHANGE IN FAIR VALUE OF DERIVATIVE INSTRUMENTS TOTAL Balance as of December 31, 2017 $ (103,989) $ — $ (103,989) Other comprehensive (loss) income: Foreign currency translation and other adjustments (160,702) — (160,702) Change in fair value of derivative instruments — (973) (973) Total other comprehensive (loss) income (160,702) (973) (161,675) Balance as of December 31, 2018 (264,691) (973) (265,664) Other comprehensive income (loss): Foreign currency translation and other adjustments 11,866 — 11,866 Change in fair value of derivative instruments — (8,783) (8,783) Total other comprehensive income (loss) 11,866 (8,783) 3,083 Balance as of December 31, 2019 (252,825) (9,756) (262,581) Other comprehensive income (loss): Foreign currency translation and other adjustments 46,635 — 46,635 Change in fair value of derivative instruments — (39,947) (39,947) Total other comprehensive income (loss) 46,635 (39,947) 6,688 Balance as of December 31, 2020 $ (206,190) $ (49,703) $ (255,893)
Schedule of amortization expense associated with software - property, plant and equipment	During the years ended December 31, 2020, 2019 and 2018, capitalized interest is as follows: YEAR ENDED DECEMBER 31, 2020 2019 2018 Capitalized interest $ 14,321 $ 15,980 $ 3,732 During the years ended December 31, 2020, 2019 and 2018, capitalized costs associated with the development of internal use computer software projects are as follows: YEAR ENDED DECEMBER 31, 2020 2019 2018 Capitalized costs associated with the development of internal use computer software projects $ 38,329 $ 34,650 $ 29,407 Contract Fulfillment Costs, which are included as a component of Other within Other Assets, Net, as of December 31, 2020 and 2019 are as follows: DECEMBER 31, 2020 DECEMBER 31, 2019 DESCRIPTION GROSS ACCUMULATED NET GROSS ACCUMULATED NET Intake Costs asset $ 63,721 $ (33,352) $ 30,369 $ 41,224 $ (23,579) $ 17,645 Commissions asset 91,069 (38,787) 52,282 68,008 (27,178) 40,830 Amortization expense associated with the Intake Costs and Commissions assets for the years ended December 31, 2020, 2019 and 2018 are as follows: YEAR ENDED DECEMBER 31, DESCRIPTION 2020 2019 2018 Intake Costs asset $ 13,300 $ 10,144 $ 10,380 Commissions asset 24,052 19,109 13,838
Contract with customer, future amortization expense	Estimated amortization expense for Contract Fulfillment Costs is as follows: YEAR ESTIMATED AMORTIZATION 2021 $ 38,954 2022 24,861 2023 18,836
Schedule of deferred revenue liabilities	Deferred revenue liabilities are reflected as follows in our Consolidated Balance Sheets: DECEMBER 31, DESCRIPTION LOCATION IN BALANCE SHEET 2020 2019 Deferred revenue - Current Deferred revenue $ 295,785 $ 274,036 Deferred revenue - Long-term Other Long-term Liabilities 35,612 36,029
Schedule of revenue	Storage rental revenue, including revenue associated with power and connectivity, associated with our Global Data Center Business for the years ended December 31, 2020, 2019 and 2018 are as follows: YEAR ENDED DECEMBER 31, 2020 2019 2018 Storage rental revenue (1) $ 263,695 $ 246,925 $ 218,675 (1) Revenue associated with power and connectivity included within storage rental revenue was $47,451, $43,269 and $38,749 for the years ended December 31, 2020, 2019 and 2018, respectively.
Payments to be received	The future minimum lease payments we expect to receive under non-cancellable data center operating leases for which we are the lessor, excluding month to month leases, for the next five years are as follows: YEAR FUTURE MINIMUM LEASE PAYMENTS 2021 $ 225,554 2022 183,027 2023 142,787 2024 111,106 2025 77,308
Schedule of stock-based compensation expense	Stock-based compensation expense for Employee Stock-Based Awards included in the accompanying Consolidated Statements of Operations for the years ended December 31, 2020, 2019 and 2018 is as follows: YEAR ENDED DECEMBER 31, 2020 2019 2018 Stock-based compensation expense $ 37,674 $ 35,654 $ 31,167 Stock-based compensation expense, after tax 36,584 33,103 28,998
Schedule of weighted average assumptions	These values were estimated on the date of grant using the Black-Scholes option pricing model. The weighted average assumptions used for grants in the years ended December 31, 2020, 2019 and 2018 are as follows: YEAR ENDED DECEMBER 31, WEIGHTED AVERAGE ASSUMPTIONS 2020 2019 2018 Expected volatility (1) 25.4 % 24.3 % 25.4 % Risk-free interest rate (2) 1.45 % 2.47 % 2.65 % Expected dividend yield (3) 7 % 7 % 7 % Expected life (4) 10.0 years 5.0 years 5.0 years (1) Expected volatility is calculated utilizing daily historical volatility over a period that equates to the expected life of the option. (2) Risk-free interest rate is based on the United States Treasury interest rates whose term is consistent with the expected life (estimated period of time outstanding) of the stock options. (3) Expected dividend yield is considered in the option pricing model and represents our current annualized expected per share dividends over the current trade price of our common stock. (4) Expected life of the stock options granted is estimated using the historical exercise behavior of employees.
Summary of stock option activity	A summary of stock option activity for the year ended December 31, 2020 is as follows: OPTIONS WEIGHTED WEIGHTED AVERAGE AGGREGATE Outstanding at December 31, 2019 4,835,721 $ 35.64 Granted 589,993 33.32 Exercised (204,540) 24.38 Forfeited (151,230) 35.36 Expired (337,425) 35.82 Outstanding at December 31, 2020 4,732,519 $ 35.83 6.27 $ 469 Options exercisable at December 31, 2020 3,439,748 $ 36.40 5.46 $ 469 Options expected to vest 1,266,640 $ 34.28 8.41 $ —
Summary of restricted stock and RSU activity	The fair value of RSUs vested during the years ended December 31, 2020, 2019 and 2018, are as follows: YEAR ENDED DECEMBER 31, 2020 2019 2018 Fair value of RSUs vested $ 26,492 $ 21,191 $ 20,454 A summary of RSU activity for the year ended December 31, 2020 is as follows: RSUs WEIGHTED-AVERAGE Non-vested at December 31, 2019 1,203,599 $ 34.71 Granted 1,078,124 31.68 Vested (792,083) 33.45 Forfeited (195,634) 34.28 Non-vested at December 31, 2020 1,294,006 $ 33.02
Schedule of performance stock units and PU activity	The fair value of earned PUs that vested during the years ended December 31, 2020, 2019 and 2018, is as follows: YEAR ENDED DECEMBER 31, 2020 2019 2018 Fair value of earned PUs that vested $ 11,812 $ 6,503 $ 3,117
Summary of performance unit (PU) activity	A summary of PU activity for the year ended December 31, 2020 is as follows: ORIGINAL PU ADJUSTMENT (1) TOTAL PU WEIGHTED-AVERAGE Non-vested at December 31, 2019 1,113,691 (314,798) 798,893 $ 36.56 Granted 425,777 — 425,777 34.85 Vested (316,730) — (316,730) 37.29 Forfeited/Performance or Market Conditions Not Achieved (149,529) (4,710) (154,239) 28.28 Non-vested at December 31, 2020 1,073,209 (319,508) 753,701 $ 36.98 (1) Represents an increase or decrease in the number of original PUs awarded based on either the final performance criteria or market condition achievement at the end of the performance period of such PUs or a change in estimated awards based on the forecasted performance against the predefined targets.
Other expense (income), net	Consolidated other expense (income), net for the years ended December 31, 2020, 2019 and 2018 consists of the following: YEAR ENDED DECEMBER 31, 2020 2019 2018 Foreign currency transaction losses (gains), net (1) $ 29,830 $ 24,852 $ (15,567) Debt extinguishment expense 68,300 — — Other, net (2) 45,415 9,046 3,875 Other Expense (Income), Net $ 143,545 $ 33,898 $ (11,692) (1) The gain or loss on foreign currency transactions, calculated as the difference between the historical exchange rate and the exchange rate at the applicable measurement date, includes gains or losses primarily related to (i) borrowings in certain foreign currencies under our Revolving Credit Facility (as defined in Note 6), (ii) our previously outstanding Euro Notes (as defined in Note 6), (iii) certain foreign currency denominated intercompany obligations of our foreign subsidiaries to us and between our foreign subsidiaries, which are not considered permanently invested and (iv) amounts that are paid or received on the net settlement amount from forward contracts (as more fully discussed in Note 5). (2) Other, net for the year ended December 31, 2020 consists primarily of changes in the estimated value of our mandatorily redeemable noncontrolling interests as well as losses on our equity method investments.
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 years ended December 31, 2020, 2019 and 2018 is as follows: YEAR ENDED DECEMBER 31, 2020 2019 2018 Income (loss) from continuing operations $ 343,096 $ 268,211 $ 367,558 Less: Net income (loss) attributable to noncontrolling interests 403 938 1,198 Income (loss) from continuing operations (utilized in numerator of Earnings Per Share calculation) 342,693 267,273 366,360 Income (loss) from discontinued operations, net of tax — 104 (12,427) Net income (loss) attributable to Iron Mountain Incorporated $ 342,693 $ 267,377 $ 353,933 Weighted-average shares—basic 288,183,000 286,971,000 285,913,000 Effect of dilutive potential stock options 24,903 145,509 234,558 Effect of dilutive potential RSUs and PUs 435,287 570,435 505,030 Weighted-average shares—diluted 288,643,190 287,686,944 286,652,588 Earnings (losses) per share—basic: Income (loss) from continuing operations $ 1.19 $ 0.93 $ 1.28 (Loss) income from discontinued operations, net of tax — — (0.04) Net income (loss) attributable to Iron Mountain Incorporated (1) $ 1.19 $ 0.93 $ 1.24 Earnings (losses) per share—diluted: Income (loss) from continuing operations $ 1.19 $ 0.93 $ 1.28 (Loss) income from discontinued operations, net of tax — — (0.04) Net income (loss) attributable to Iron Mountain Incorporated (1) $ 1.19 $ 0.93 $ 1.23 Antidilutive stock options, RSUs and PUs, excluded from the calculation 5,663,981 4,475,745 3,258,078
Components of amortizable intangible assets	The gross carrying amount and accumulated amortization of our finite-lived intangible assets as of December 31, 2020 and 2019, respectively, are as follows: DECEMBER 31, 2020 DECEMBER 31, 2019 DESCRIPTION GROSS CARRYING AMOUNT ACCUMULATED AMORTIZATION NET CARRYING AMOUNT GROSS CARRYING AMOUNT ACCUMULATED AMORTIZATION NET CARRYING AMOUNT Assets: Customer relationship intangible assets (1) $ 1,852,700 $ (668,547) $ 1,184,153 $ 1,751,848 $ (544,721) $ 1,207,127 Customer inducements (1) 49,098 (26,923) 22,175 52,718 (29,397) 23,321 Data center lease-based intangible assets (1)(2) 269,988 (149,339) 120,649 265,945 (103,210) 162,735 Third-party commissions asset (3) 34,317 (8,761) 25,556 31,708 (4,134) 27,574 Liabilities: Data center below-market leases (4) $ 12,854 $ (5,943) $ 6,911 $ 12,750 $ (3,937) $ 8,813 (1) Included in Customer relationships, customer inducements and data center lease-based intangibles in the accompanying Consolidated Balance Sheets as of December 31, 2020 and 2019. (2) Data center lease-based intangible assets includes Data Center In-Place Leases, Data Center Tenant Relationships and Data Center Above-Market Leases. (3) Included in Other (within Other Assets, Net) in the accompanying Consolidated Balance Sheets as of December 31, 2020 and 2019. (4) Included in Other long-term liabilities in the accompanying Consolidated Balance Sheets as of December 31, 2020 and 2019.
Schedule of derivative instruments	(Liabilities) assets recognized in our Consolidated Balance Sheets as of December 31, 2020 and 2019 by derivative instrument are as follows: DERIVATIVE INSTRUMENT (1) DECEMBER 31, 2020 DECEMBER 31, 2019 Cash Flow Hedges (2) Interest Rate Swap Agreements $ (21,062) $ (8,774) Net Investment Hedges (3) August 2023 Cross Currency Swap Agreements (8,229) (982) February 2026 Cross Currency Swap Agreements (20,412) — (1) Our derivative assets are included as a component of Other within Other assets, net and our derivative liabilities are included as a component of Other long-term liabilities in our Consolidated Balance Sheets. (2) As of December 31, 2020, cumulative net losses of $21,062 are recorded within Accumulated other comprehensive items, net associated with these interest rate swap agreements. (3) As of December 31, 2020, cumulative net losses of $28,641 are recorded within Accumulated other comprehensive items, net associated with these cross currency swap agreements.

Acquisitions and Joint Ventur_2

Acquisitions and Joint Ventures (Tables)	12 Months Ended
	Dec. 31, 2020
Business Combinations [Abstract]
Schedule of recognized identified assets acquired and liabilities assumed	A summary of the cumulative consideration paid and the allocation of the purchase price paid for all of our acquisitions in each respective year is as follows: 2020 2019 2018 TOTAL TOTAL IODC OTHER FISCAL TOTAL Cash Paid (gross of cash acquired) (1) $ 124,614 $ 53,230 $ 1,347,046 $ 432,078 $ 1,779,124 Purchase Price Holdbacks and Other (2) — 4,135 — 35,218 35,218 Fair Value of Investments Applied to Acquisitions 27,276 — — — — Total Consideration 151,890 57,365 1,347,046 467,296 1,814,342 Fair Value of Identifiable Assets Acquired: Cash 6,545 2,260 34,307 10,227 44,534 Accounts Receivable, Prepaid Expenses and Other Assets 16,559 3,102 7,070 17,662 24,732 Property, Plant and Equipment (3) 52,021 5,396 863,027 225,848 1,088,875 Customer Relationship Intangible Assets (4) 79,065 22,071 — 44,622 44,622 Operating Lease Right-of-Use Assets 100,040 16,956 — — — Data Center In-Place Leases (5) — — 104,340 36,130 140,470 Data Center Tenant Relationships (6) — — 77,362 18,410 95,772 Data Center Above-Market Leases (7) — — 16,439 2,381 18,820 Debt Assumed (27,363) — — (12,312) (12,312) Accounts Payable, Accrued Expenses and Other Liabilities (19,564) (3,233) (36,230) (17,206) (53,436) Operating Lease Liabilities (100,040) (16,956) — — — Deferred Income Taxes (9,631) (1,813) — (43,218) (43,218) Data Center Below-Market Leases (7) — — (11,421) (694) (12,115) Total Fair Value of Identifiable Net Assets Acquired 97,632 27,783 1,054,894 281,850 1,336,744 Goodwill Initially Recorded (8) $ 54,258 $ 29,582 $ 292,152 $ 185,446 $ 477,598 (1) Cash paid for acquisitions, net of cash acquired in our Consolidated Statement of Cash Flows includes contingent and other payments of $512, $7,267 and $23,967 for the years ended December 31, 2020, 2019 and 2018, respectively, related to acquisitions made in the years prior to 2020, 2019 and 2018, respectively. (2) Purchase price holdbacks and other includes $18,824 purchase price accrued for the EvoSwitch Transaction in 2018. (3) Consists primarily of buildings, building improvements, leasehold improvements, data center infrastructure, racking structures, warehouse equipment and computer hardware and software. (4) The weighted average lives of Customer Relationship Intangible Assets associated with acquisitions in 2020, 2019 and 2018 was 14 years, 16 years and 10 years, respectively. (5) The weighted average lives of Data Center In-Place Leases associated with acquisitions in 2018 was six years. (6) The weighted average lives of Data Center Tenant Relationships associated with acquisitions in 2018 was nine years. (7) The weighted average lives of Data Center Above-Market Leases associated with acquisitions in 2018 was three years and the weighted average lives of data center below-market leases associated with acquisitions in 2018 was seven years. (8) The goodwill associated with acquisitions, including IODC, is primarily attributable to the assembled workforce, expanded market opportunities and costs and other operating synergies anticipated upon the integration of the operations of our business and the acquired businesses.

Derivative Instruments and He_2

Derivative Instruments and Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of derivative instruments	(Liabilities) assets recognized in our Consolidated Balance Sheets as of December 31, 2020 and 2019 by derivative instrument are as follows: DERIVATIVE INSTRUMENT (1) DECEMBER 31, 2020 DECEMBER 31, 2019 Cash Flow Hedges (2) Interest Rate Swap Agreements $ (21,062) $ (8,774) Net Investment Hedges (3) August 2023 Cross Currency Swap Agreements (8,229) (982) February 2026 Cross Currency Swap Agreements (20,412) — (1) Our derivative assets are included as a component of Other within Other assets, net and our derivative liabilities are included as a component of Other long-term liabilities in our Consolidated Balance Sheets. (2) As of December 31, 2020, cumulative net losses of $21,062 are recorded within Accumulated other comprehensive items, net associated with these interest rate swap agreements. (3) As of December 31, 2020, cumulative net losses of $28,641 are recorded within Accumulated other comprehensive items, net associated with these cross currency swap agreements.
Schedule of (Gains) Losses For Derivative Instruments	Losses (gains) recognized during the years ending December 31, 2020, 2019 and 2018, by derivative instrument, are as follows: YEAR ENDED DECEMBER 31, DERIVATIVE INSTRUMENT 2020 2019 2018 Derivative Instruments Designated as Hedging Instruments (1) Cash Flow Hedges Interest Rate Swap Agreements $ 12,288 $ 7,801 $ 973 Net Investment Hedges August 2023 Cross Currency Swap Agreements 7,247 982 — February 2026 Cross Currency Swap Agreements 20,412 — — Derivative Instruments Not Designated as Hedging Instruments (2) Foreign Exchange Currency Forward Contracts — 737 4,954 (1) These amounts are recognized as unrealized losses (gains), a component of Accumulated other comprehensive items, net.
Schedule of Net Investment Hedges in Accumulated Other Comprehensive Income (Loss)	As a result, we recorded the following foreign exchange losses (gains) related to the change in fair value of such debt due to currency translation adjustments as a component of Accumulated other comprehensive items, net: YEAR ENDED DECEMBER 31, 2020 2019 2018 Foreign exchange losses (gains) associated with net investment hedge $ 17,005 $ 6,003 $ 11,070

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2020
Debt Disclosure [Abstract]
Schedule of Carrying Amount and Fair Value of Long-term Debt Instruments	6. DEBT Long-term debt is as follows: DECEMBER 31, 2020 DECEMBER 31, 2019 DEBT (INCLUSIVE OF DISCOUNT) UNAMORTIZED DEFERRED FINANCING COSTS CARRYING AMOUNT FAIR DEBT (INCLUSIVE OF DISCOUNT) UNAMORTIZED DEFERRED FINANCING COSTS CARRYING AMOUNT FAIR Revolving Credit Facility (1) $ — $ (8,620) $ (8,620) $ — $ 348,808 $ (12,053) $ 336,755 $ 348,808 Term Loan A (1) 215,625 — 215,625 215,625 228,125 — 228,125 228,125 Term Loan B (1)(2) 679,621 (6,244) 673,377 680,750 686,395 (7,493) 678,902 686,890 Australian Dollar Term Loan (the “AUD Term Loan”) (3)(4) 243,152 (1,624) 241,528 244,014 226,924 (2,313) 224,611 228,156 UK Bilateral Revolving Credit Facility (4) 191,101 (1,307) 189,794 191,101 184,601 (1,801) 182,800 184,601 4 3 / 8 % Senior Notes due 2021 (the “4 3 / 8 % Notes”) (5)(6)(7) — — — — 500,000 (2,436) 497,564 503,450 6% Senior Notes due 2023 (the “6% Notes”) (5)(6) — — — — 600,000 (4,027) 595,973 613,500 5 3 / 8 % CAD Senior Notes due 2023 (the “CAD Notes”) (5)(7)(8) — — — — 192,058 (2,071) 189,987 199,380 5 3 / 4 % Senior Subordinated Notes due 2024 (the “5 3 / 4 % Notes”) (5)(6) — — — — 1,000,000 (6,409) 993,591 1,010,625 3% Euro Senior Notes due 2025 (the “Euro Notes”) (5)(6)(7) — — — — 336,468 (3,462) 333,006 345,660 3 7 / 8 % GBP Senior Notes due 2025 (the “GBP Notes “) (5)(7)(9) 546,003 (4,983) 541,020 553,101 527,432 (5,809) 521,623 539,892 5 3 / 8 % Senior Notes due 2026 (the “5 3 / 8 % Notes”) (5)(7)(10) — — — — 250,000 (2,756) 247,244 261,641 4 7 / 8 % Senior Notes due 2027 (the “4 7 / 8 % Notes due 2027”) (5)(6)(7) 1,000,000 (9,598) 990,402 1,046,250 1,000,000 (11,020) 988,980 1,029,475 5 1 / 4 % Senior Notes due 2028 (the “5 1 / 4 % Notes due 2028”) (5)(6)(7) 825,000 (8,561) 816,439 868,313 825,000 (9,742) 815,258 859,598 5% Senior Notes due 2028 (the “5% Notes”) (5)(6)(7) 500,000 (5,486) 494,514 523,125 — — — — 4 7 / 8 % Senior Notes due 2029 (the “4 7 / 8 % Notes due 2029”) (5)(6)(7) 1,000,000 (12,658) 987,342 1,050,000 1,000,000 (14,104) 985,896 1,015,640 5 1 / 4 % Senior Notes due 2030 (the “5 1 / 4 % Notes due 2030”) (5)(6)(7) 1,300,000 (14,416) 1,285,584 1,400,750 — — — — 4 1 / 2 % Senior Notes due 2031 (the “4 1 / 2 % Notes”) (5)(6)(7) 1,100,000 (12,648) 1,087,352 1,138,500 — — — — 5 5 / 8 % Senior Notes due 2032 (the “5 5 / 8 % Notes”) (5)(6)(7) 600,000 (6,727) 593,273 660,000 — — — — Real Estate Mortgages, Financing Lease Liabilities and Other (11) 511,922 (1,086) 510,836 511,922 573,671 (1,388) 572,283 623,671 Accounts Receivable Securitization Program (12) 85,000 (152) 84,848 85,000 272,062 (81) 271,981 272,062 Total Long-term Debt 8,797,424 (94,110) 8,703,314 8,751,544 (86,965) 8,664,579 Less Current Portion (193,759) — (193,759) (389,013) — (389,013) Long-term Debt, Net of Current Portion $ 8,603,665 $ (94,110) $ 8,509,555 $ 8,362,531 $ (86,965) $ 8,275,566 6. DEBT (CONTINUED) (1) The capital stock or other equity interests of most of our United States subsidiaries, and up to 66% of the capital stock or other equity interests of most of our first-tier foreign subsidiaries, are pledged to secure these debt instruments, together with all intercompany obligations (including promissory notes) of subsidiaries owed to us or to one of our United States subsidiary guarantors. In addition, Iron Mountain Canada Operations ULC (“Canada Company”) has pledged 66% of the capital stock of its subsidiaries, and all intercompany obligations (including promissory notes) owed to or held by it, to secure the Canadian dollar subfacility under the Revolving Credit Facility. The fair value (Level 3 of fair value hierarchy described at Note 2.o.) of these debt instruments approximates the carrying value (as borrowings under these debt instruments are based on current variable market interest rates (plus a margin that is subject to change based on our consolidated leverage ratio)), as of December 31, 2020 and 2019. (2) The amount of debt for the Term Loan B (as defined below) reflects an unamortized original issue discount of $1,129 and $1,355 as of December 31, 2020 and 2019, respectively. (3) The amount of debt for the AUD Term Loan reflects an unamortized original issue discount of $862 and $1,232 as of December 31, 2020 and 2019, respectively. (4) The fair value (Level 3 of fair value hierarchy described at Note 2.o.) of this debt instrument approximates the carrying value as borrowings under this debt instrument are based on a current variable market interest rate. (5) The fair values (Level 1 of fair value hierarchy described at Note 2.o.) of these debt instruments are based on quoted market prices for these notes on December 31, 2020 and 2019, respectively. (6) 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 direct and indirect 100% owned United States subsidiaries that represent the substantial majority of our United States operations (the “Guarantors”). These guarantees are joint and several obligations of the Guarantors. The remainder of our subsidiaries do not guarantee the Parent Notes. (7) Collectively, the “Unregistered Notes". The Unregistered Notes have not been registered under the Securities Act of 1933, as amended (the “Securities Act”), or under the securities laws of any other jurisdiction. Unless they are registered, the Unregistered Notes may be offered only in transactions that are exempt from registration under the Securities Act or the securities laws of any other jurisdiction. (8) Canada Company was the direct obligor on the CAD Notes, which were fully and unconditionally guaranteed, on a senior basis, by IMI and the Guarantors. These guarantees were joint and several obligations of IMI and the Guarantors. (9) Iron Mountain (UK) PLC (“IM UK”) is the direct obligor on the GBP Notes, which are fully and unconditionally guaranteed, on a senior basis, by IMI and the Guarantors. These guarantees are joint and several obligations of IMI and the Guarantors. (10) Iron Mountain US Holdings, Inc., one of the Guarantors, was the direct obligor on the 5 3 / 8 % Notes, which were fully and unconditionally guaranteed, on a senior basis, by IMI and the other Guarantors. These guarantees were joint and several obligations of IMI and such Guarantors. (11) We believe the fair value (Level 3 of fair value hierarchy described at Note 2.o.) of this debt approximates its carrying value. This debt includes the following: DECEMBER 31, 2020 DECEMBER 31, 2019 Real estate mortgages (i) $ 71,673 $ 77,036 Financing lease liabilities (ii) 366,311 367,182 Other notes and other obligations (iii) 73,938 129,453 $ 511,922 $ 573,671 (i) Bear interest at approximately 3.3% and 3.9% at December 31, 2020 and 2019, respectively, and includes $50,000 outstanding under our Mortgage Securitization Program at both December 31, 2020 and 2019. (ii) Bear a weighted average interest rate of 5.9% and 5.7% at December 31, 2020 and 2019, respectively. (iii) These notes and other obligations, which were assumed by us as a result of certain acquisitions bear a weighted average interest rate of 10.7% and 10.8% at December 31, 2020 and 2019, respectively.
Schedule of Redemption Dates and Prices of the Senior or Senior Subordinated Notes	The key terms of our indentures are as follows: SENIOR NOTES AGGREGATE DIRECT MATURITY DATE CONTRACTUAL INTEREST RATE INTEREST PAYMENTS DUE PAR CALL DATE (1) GBP Notes £ 400,000 IM UK November 15, 2025 3 7 / 8 % May 15 and November 15 November 15, 2022 4 7 / 8 % Notes due 2027 $ 1,000,000 IMI September 15, 2027 4 7 / 8 % March 15 and September 15 September 15, 2025 5 1 / 4 % Notes due 2028 $ 825,000 IMI March 15, 2028 5 1 / 4 % March 15 and September 15 March 15, 2025 5% Notes $ 500,000 IMI July 15, 2028 5% January 15 and July 15 July 15, 2025 4 7 / 8 % Notes due 2029 $ 1,000,000 IMI September 15, 2029 4 7 /8 % March 15 and September 15 September 15, 2027 5 1 / 4 % Notes due 2030 $ 1,300,000 IMI July 15, 2030 5 1 /4 % January 15 and July 15 July 15, 2028 4 1 / 2 % Notes $ 1,100,000 IMI February 15, 2031 4 1 / 2 % February 15 and August 15 February 15, 2029 5 5 / 8 % Notes $ 600,000 IMI July 15, 2032 5 5 / 8 % January 15 and July 15 July 15, 2029 (1) We may redeem the notes at any time, at our option, in whole or in part. Prior to the par call date, we may redeem the notes at the redemption price or make-whole premium specified in the applicable indenture, together with accrued and unpaid interest to, but excluding, the redemption date. On or after the par call date, we may redeem the notes at a price equal to 100% of the principal amount being redeemed, together with accrued and unpaid interest to, but excluding, the redemption date. On June 22, 2020, IMI completed private offerings of the following series of notes in the amounts set forth below (collectively, the "June 2020 Offerings"): SERIES OF NOTES AGGREGATE PRINCIPAL AMOUNT 5% Notes $ 500,000 5 1 / 4 % Notes due 2030 1,300,000 5 5 / 8 % Notes 600,000 On August 18, 2020, IMI completed a private offering of: SERIES OF NOTES AGGREGATE PRINCIPAL AMOUNT 4 1 / 2 % Notes $ 1,100,000
Schedule of Net Cash Position in Cash Pool Agreements	The approximate amount of the net cash position, gross position and outstanding debit balances for the QRS Cash Pool and TRS Cash Pool as of December 31, 2020 and 2019 were as follows: DECEMBER 31, 2020 DECEMBER 31, 2019 GROSS CASH POSITION OUTSTANDING DEBIT BALANCES NET CASH POSITION GROSS CASH POSITION OUTSTANDING DEBIT BALANCES NET CASH POSITION QRS Cash Pool $ 448,700 $ (447,400) $ 1,300 $ 372,100 $ (369,000) $ 3,100 TRS Cash Pool 555,500 (553,500) 2,000 319,800 (301,300) 18,500
Schedule of Maturities of Long-term Debt	MATURITIES OF LONG-TERM DEBT (GROSS OF DISCOUNTS) ARE AS FOLLOWS : YEAR AMOUNT 2021 $ 193,759 2022 536,811 2023 232,264 2024 45,680 2025 569,005 Thereafter 7,221,896 8,799,415 Net Discounts (1,991) Net Deferred Financing Costs (94,110) Total Long-term Debt (including current portion) $ 8,703,314

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Contractual obligations related to purchase commitments	We have certain contractual obligations related to purchase commitments which require minimum payments as follows: YEAR PURCHASE COMMITMENTS (1) 2021 $ 189,855 2022 45,339 2023 31,507 2024 28,269 2025 25,554 Thereafter 322 $ 320,846 (1) Purchase commitments (i) include obligations for future construction costs associated with the expansion of our Global Data Center Business, which represent a significant amount of the purchase commitments due in 2021 and (ii) exclude our operating and financing lease obligations (see Note 2.i.).

Stockholders' Equity Matters (T

Stockholders' Equity Matters (Tables)	12 Months Ended
	Dec. 31, 2020
Equity [Abstract]
Schedule of Dividends Declared and Payments	In 2018, 2019 and 2020, our board of directors declared the following dividends: DECLARATION DATE DIVIDEND RECORD DATE TOTAL AMOUNT PAYMENT DATE February 14, 2018 $ 0.5875 March 15, 2018 $ 167,969 April 2, 2018 May 24, 2018 0.5875 June 15, 2018 168,078 July 2, 2018 July 24, 2018 0.5875 September 17, 2018 168,148 October 2, 2018 October 25, 2018 0.6110 December 17, 2018 174,935 January 3, 2019 February 7, 2019 0.6110 March 15, 2019 175,242 April 2, 2019 May 22, 2019 0.6110 June 17, 2019 175,389 July 2, 2019 July 26, 2019 0.6110 September 16, 2019 175,434 October 2, 2019 October 31, 2019 0.6185 December 16, 2019 177,687 January 2, 2020 February 13, 2020 0.6185 March 16, 2020 178,047 April 6, 2020 May 5, 2020 0.6185 June 15, 2020 178,212 July 2, 2020 August 5, 2020 0.6185 September 15, 2020 178,224 October 2, 2020 November 4, 2020 0.6185 December 15, 2020 178,290 January 6, 2021 During the years ended December 31, 2020, 2019 and 2018, we declared dividends in an aggregate and per share amount, based on the weighted average number of common shares outstanding during each respective year, as follows: YEAR ENDED DECEMBER 31, 2020 2019 2018 Declared distributions $ 712,773 $ 703,752 $ 679,130 Amount per share each distribution represents based on weighted average number of common shares outstanding 2.47 2.45 2.38
Schedule of Classification of Dividends Paid	For the years ended December 31, 2020, 2019, and 2018, the dividends we paid on our common shares were classified as follows: YEAR ENDED DECEMBER 31, 2020 2019 2018 Nonqualified ordinary dividends 43.0 % 54.8 % 83.0 % Qualified ordinary dividends — % 4.5 % 4.8 % Capital gains 49.5 % 14.7 % 5.8 % Return of capital 7.5 % 26.0 % 6.4 % 100.0 % 100.0 % 100.0 %

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Components of deferred tax assets and deferred tax liabilities	The significant components of our deferred tax assets and deferred tax liabilities as of December 31, 2020 and 2019 are presented below: DECEMBER 31, 2020 2019 Deferred Tax Assets: Accrued liabilities and other adjustments $ 52,527 $ 53,197 Net operating loss carryforwards 96,710 99,240 Federal benefit of unrecognized tax benefits — 3,039 Valuation allowance (46,938) (60,003) 102,299 95,473 Deferred Tax Liabilities: Other assets, principally due to differences in amortization (186,682) (177,645) Plant and equipment, principally due to differences in depreciation (59,711) (67,515) Other (29,265) (21,903) (275,658) (267,063) Net deferred tax liability $ (173,359) $ (171,590) The deferred tax assets and deferred tax liabilities as of December 31, 2020 and 2019 are presented below: DECEMBER 31, 2020 2019 Noncurrent deferred tax assets (Included in Other, a component of Other assets, net) $ 25,018 $ 16,538 Deferred income taxes (198,377) (188,128)
Roll forward of Valuation allowance	Rollforward of the valuation allowance is as follows: YEAR ENDED DECEMBER 31, BALANCE AT BEGINNING OF CHARGED OTHER INCREASES/ (DECREASES) (1) BALANCE 2020 $ 60,003 $ (8,337) $ (4,728) $ 46,938 2019 55,666 6,211 (1,874) 60,003 2018 61,756 3,568 (9,658) 55,666 (1) Other increases and decreases in valuation allowances are primarily related to changes in foreign currency exchange rates.
Components of income (loss) from continuing operations before provision for income taxes	The components of income (loss) from continuing operations before provision (benefit) for income taxes for the years ended December 31, 2020, 2019 and 2018 are as follows: YEAR ENDED DECEMBER 31, 2020 2019 2018 United States $ 276,145 $ 203,225 $ 203,078 Canada 52,332 48,326 53,779 Other Foreign 44,228 76,591 153,454 $ 372,705 $ 328,142 $ 410,311
Provision (benefit) for income taxes	The provision (benefit) for income taxes for the years ended December 31, 2020, 2019 and 2018 consist of the following components: YEAR ENDED DECEMBER 31, 2020 2019 2018 Federal—current $ (10,424) $ 7,262 $ 703 Federal—deferred 8,834 (3,356) (4,162) State—current 2,956 3,943 918 State—deferred (625) (1,126) 627 Foreign—current 50,063 49,350 45,371 Foreign—deferred (21,195) 3,858 (704) Provision (Benefit) for Income Taxes $ 29,609 $ 59,931 $ 42,753
Reconciliation of total income tax expense and amount computed by applying the federal income tax rate	A reconciliation of total income tax expense and the amount computed by applying the current federal statutory tax rate of 21.0% to income (loss) from continuing operations before provision (benefit) for income taxes for the years ended December 31, 2020, 2019 and 2018, respectively, is as follows: YEAR ENDED DECEMBER 31, 2020 2019 2018 Computed "expected” tax provision $ 78,268 $ 68,910 $ 86,165 Changes in income taxes resulting from: Tax adjustment relating to REIT (60,378) (40,577) (35,165) State taxes (net of federal tax benefit) 2,258 2,115 1,599 (Decrease) increase in valuation allowance (net operating losses) (8,337) 6,211 3,568 (Reversal) reserve accrual and audit settlements (net of federal tax benefit) (7,409) 514 (13,985) Foreign tax rate differential 9,472 8,562 1,031 Disallowed foreign interest, Subpart F income, and other foreign taxes 20,242 14,241 903 Other, net (4,507) (45) (1,363) Provision (Benefit) for Income Taxes $ 29,609 $ 59,931 $ 42,753 The primary reconciling items between the federal statutory tax rate of 21.0% and our overall effective tax rate were: YEAR ENDED DECEMBER 31, 2020 2019 2018 The benefit derived from the dividends paid deduction of $60,378 and the impact of differences in the tax rates at which our foreign earnings are subject to, resulting in a tax provision of $9,472. The benefit derived from the dividends paid deduction of $40,577 and the impact of differences in the tax rates at which our foreign earnings are subject to, resulting in a tax provision of $8,562. The benefit derived from the dividends paid deduction of $35,165, the impact of differences in the tax rates at which our foreign earnings are subject to, resulting in a tax provision of $1,031 and a discrete tax benefit of approximately $14,000 associated with the resolution of a tax matter (which was included as a component of Accrued expenses in our Consolidated Balance Sheet as of December 31, 2017).
Reconciliation of unrecognized tax benefits	A rollforward of unrecognized tax benefits is as follows: Gross tax contingencies—December 31, 2017 $ 38,533 Gross additions based on tax positions related to the current year 3,147 Gross additions for tax positions of prior years 981 Gross reductions for tax positions of prior years (2,865) Lapses of statutes (4,462) Settlements (14) Gross tax contingencies—December 31, 2018 35,320 Gross additions based on tax positions related to the current year 2,914 Gross additions for tax positions of prior years 1,271 Gross reductions for tax positions of prior years (299) Lapses of statutes (4,034) Settlements (104) Gross tax contingencies—December 31, 2019 35,068 Gross additions based on tax positions related to the current year 2,907 Gross additions for tax positions of prior years 80 Gross reductions for tax positions of prior years (5,617) Lapses of statutes (4,480) Settlements (1,989) Gross tax contingencies—December 31, 2020 $ 25,969

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
Schedule of Analysis of Business Segment Information and Reconciliation	An analysis of our business segment information and reconciliation to the accompanying Consolidated Financial Statements is as follows: GLOBAL RIM BUSINESS GLOBAL CORPORATE TOTAL As of and for the Year Ended December 31, 2020 Total Revenues $ 3,699,280 $ 279,312 $ 168,678 $ 4,147,270 Storage Rental 2,373,783 263,695 116,613 2,754,091 Service 1,325,497 15,617 52,065 1,393,179 Depreciation and Amortization 455,567 134,844 61,658 652,069 Depreciation 309,969 83,106 54,487 447,562 Amortization 145,598 51,738 7,171 204,507 Adjusted EBITDA 1,574,069 126,576 (224,924) 1,475,721 Total Assets (1) 10,938,359 2,727,654 483,254 14,149,267 Expenditures for Segment Assets 338,006 249,459 44,389 631,854 Capital Expenditures 150,175 243,699 44,389 438,263 Cash Paid for Acquisitions, Net of Cash Acquired 118,581 — — 118,581 Acquisitions of Customer Relationships, Customer Inducements and Contract Fulfillment Costs 69,250 5,760 — 75,010 As of and for the Year Ended December 31, 2019 Total Revenues $ 3,812,433 $ 257,151 $ 193,000 $ 4,262,584 Storage Rental 2,320,076 246,925 114,086 2,681,087 Service 1,492,357 10,226 78,914 1,581,497 Depreciation and Amortization 454,652 133,927 69,622 658,201 Depreciation 330,534 78,939 46,850 456,323 Amortization 124,118 54,988 22,772 201,878 Adjusted EBITDA 1,566,065 121,517 (218,573) 1,469,009 Total Assets (1) 10,753,218 2,535,848 527,750 13,816,816 Expenditures for Segment Assets 398,690 427,935 56,242 882,867 Capital Expenditures 248,232 392,029 52,722 692,983 Cash Paid for Acquisitions, Net of Cash Acquired 54,717 — 3,520 58,237 Acquisitions of Customer Relationships, Customer Inducements, Contract Fulfillment Costs and third-party commissions 95,741 35,906 — 131,647 As of and for the Year Ended December 31, 2018 Total Revenues $ 3,842,600 $ 228,983 $ 154,178 $ 4,225,761 Storage Rental 2,301,344 218,675 102,436 2,622,455 Service 1,541,256 10,308 51,742 1,603,306 Depreciation and Amortization 472,155 105,680 61,679 639,514 Depreciation 341,384 58,707 52,649 452,740 Amortization 130,771 46,973 9,030 186,774 Adjusted EBITDA 1,572,438 99,575 (213,089) 1,458,924 Total Assets (1) 9,135,198 2,217,505 504,515 11,857,218 Expenditures for Segment Assets 443,634 1,794,386 79,286 2,317,306 Capital Expenditures 254,308 152,739 53,015 460,062 Cash Paid for Acquisitions, Net of Cash Acquired 93,217 1,639,427 25,913 1,758,557 Acquisitions of Customer Relationships, Customer Inducements and Contract Fulfillment Costs 96,109 2,220 358 98,687 (1) Excludes all intercompany receivables or payables and investment in subsidiary balances.
Schedule of Reconciliation of Adjusted EBITDA to Income (Loss) From Continuing Operations on a Consolidated Basis	A reconciliation of Income (Loss) from Continuing Operations to Adjusted EBITDA on a consolidated basis for the years ended December 31, 2020, 2019 and 2018 is as follows: YEAR ENDED DECEMBER 31, 2020 2019 2018 Income (Loss) from Continuing Operations $ 343,096 $ 268,211 $ 367,558 Add/(Deduct): Interest expense, net 418,535 419,298 409,648 Provision (benefit) for income taxes 29,609 59,931 42,753 Depreciation and amortization 652,069 658,201 639,514 Significant Acquisition Costs — 13,293 50,665 Restructuring Charges 194,396 48,597 — Intangible impairments 23,000 — — (Gain) loss on disposal/write-down of property, plant and equipment, net (including real estate) (363,537) (63,824) (73,622) Other expense (income), net, excluding our share of losses (gains) from our unconsolidated joint ventures (1) 133,611 25,720 (11,867) Stock-based compensation expense (2) 34,272 36,194 31,014 COVID-19 Costs (3) 9,285 — — Our share of Adjusted EBITDA reconciling items from our unconsolidated joint ventures 1,385 3,388 3,261 Adjusted EBITDA $ 1,475,721 $ 1,469,009 $ 1,458,924 (1) Includes foreign currency transaction losses (gains), net, debt extinguishment expense and other, net. (2) Stock-based compensation expense related to Project Summit is included within Restructuring Charges for the years ended December 31, 2020 and 2019. (3) Costs that are incremental and directly attributable to the COVID-19 pandemic which are not expected to recur once the pandemic ends (“COVID-19 Costs”). For the year ended December 31, 2020, approximately $7,600 and $1,600 of COVID-19 Costs are included within Cost of sales and Selling, general and administrative expenses, respectively, on our Consolidated Statement of Operations. These costs include the purchase of personal protective equipment for our employees and incremental cleaning costs of our facilities, among other direct costs.
Schedule of Operations in Different Geographical Areas	Information as to our operations in different geographical areas for the years ended December 31, 2020, 2019 and 2018 is as follows: YEAR ENDED DECEMBER 31, 2020 2019 2018 Revenues: United States $ 2,577,084 $ 2,632,586 $ 2,579,847 United Kingdom 247,667 274,931 280,993 Canada 224,860 243,033 249,505 Australia 133,815 143,511 155,367 Remaining Countries 963,844 968,523 960,049 Long-lived Assets: United States $ 7,818,059 $ 7,862,262 $ 6,902,232 United Kingdom 838,491 755,859 547,768 Canada 556,120 556,591 453,398 Australia 575,862 530,755 442,755 Remaining Countries 3,090,948 2,875,010 2,302,951
Schedule of Revenues By Product and Service Lines	Information as to our revenues by product and service lines by segment for the years ended December 31, 2020, 2019 and 2018 is as follows: GLOBAL RIM BUSINESS GLOBAL CORPORATE TOTAL For the Year Ended December 31, 2020 Records Management (1) $ 2,852,296 $ — $ 102,003 $ 2,954,299 Data Management (1) 488,198 — 66,675 554,873 Information Destruction (1)(2) 358,786 — — 358,786 Data Center — 279,312 — 279,312 For the Year Ended December 31, 2019 Records Management (1) $ 2,866,192 $ — $ 128,954 $ 2,995,146 Data Management (1) 520,082 — 64,046 584,128 Information Destruction (1)(2) 426,159 — — 426,159 Data Center — 257,151 — 257,151 For the Year Ended December 31, 2018 Records Management (1) $ 2,871,253 $ — $ 96,669 $ 2,967,922 Data Management (1) 539,035 — 57,509 596,544 Information Destruction (1)(2) 432,312 — — 432,312 Data Center — 228,983 — 228,983 (1) Each of the offerings within our product and service lines has a component of revenue that is storage rental related and a component that is service revenues, except the destruction services offering, which does not have a storage rental component. (2) Includes Secure Shredding services.

Project Summit (Tables)

Project Summit (Tables)	12 Months Ended
	Dec. 31, 2020
Restructuring and Related Activities [Abstract]
Schedule of restructuring	Restructuring Charges included in the accompanying Consolidated Statement of Operations for the years ended December 31, 2020 and 2019, and from the inception of Project Summit through December 31, 2020, are as follows: YEAR ENDED YEAR ENDED FROM THE INCEPTION OF PROJECT SUMMIT THROUGH DECEMBER 31, 2020 Employee severance costs $ 47,349 $ 20,850 $ 68,199 Professional fees and other costs 147,047 27,747 174,794 Restructuring Charges $ 194,396 $ 48,597 $ 242,993 12. PROJECT SUMMIT (CONTINUED) Restructuring Charges included in the accompanying Consolidated Statement of Operations by segment for the years ended December 31, 2020 and 2019, and from inception of Project Summit through December 31, 2020, are as follows: YEAR ENDED YEAR ENDED FROM THE INCEPTION OF PROJECT SUMMIT THROUGH DECEMBER 31, 2020 Global RIM Business $ 67,140 $ 21,900 $ 89,040 Global Data Center Business 1,632 306 1,938 Corporate and Other Business 125,624 26,391 152,015 Restructuring Charges $ 194,396 $ 48,597 $ 242,993 A rollforward of the accrued Restructuring Charges, which is included as a component of Accrued expenses and other current liabilities in our Consolidated Balance Sheet for the year ended December 31, 2020 is as follows: EMPLOYEE SEVERANCE COSTS PROFESSIONAL FEES AND OTHER TOTAL ACCRUED RESTRUCTURING CHARGES Inception of Project Summit $ — $ — $ — Amounts accrued 20,850 27,747 48,597 Payments (16,027) (14,793) (30,820) Other, including currency translation adjustments — — — Balance as of December 31, 2019 4,823 12,954 17,777 Amounts accrued 47,349 147,047 194,396 Payments (32,455) (136,222) (168,677) Other, including currency translation adjustments (3,439) (4) (3,443) Balance as of December 31, 2020 $ 16,278 $ 23,775 $ 40,053

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Allowance for Doubtful Accounts and Credit Memo Reserves (Details) - Allowance for doubtful accounts - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
BALANCE AT BEGINNING OF THE YEAR	$ 42,856	$ 43,584	$ 46,648
CREDIT MEMOS CHARGED TO REVENUE	55,118	51,846	36,329
ALLOWANCE FOR BAD DEBTS CHARGED TO EXPENSE	34,411	19,389	18,625
DEDUCTIONS AND OTHER	(75,404)	(71,963)	(58,018)
BALANCE AT END OF THE YEAR	$ 56,981	$ 42,856	$ 43,584

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Concentration of Credit Risk (Details)	12 Months Ended
	Dec. 31, 2020USD ($)bankfund	Dec. 31, 2019fund
Cash and Cash Equivalents [Line Items]
Number of "Triple A" rated money market funds with cash, cash equivalent and restricted cash held on deposit | fund	4	7
Number of global banks with cash, cash equivalent and restricted cash held on deposit | bank	1
Maximum investment limit in any one financial institution | $	$ 75,000,000
Investment in single mutual fund | Credit Concentration Risk
Cash and Cash Equivalents [Line Items]
Concentration risk percentage	1.00%

Summary of Significant Accoun_6

Summary of Significant Accounting Policies - Prepaid Expenses and Accrued Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Interest	$ 131,448	$ 97,987
Sales tax and VAT payable	131,780	115,352
Dividends	187,867	186,021
Operating lease liabilities	250,239	223,249
Other	444,954	339,143
Accrued expenses	$ 1,146,288	$ 961,752
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent	us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent

Summary of Significant Accoun_7

Summary of Significant Accounting Policies - Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 8,246,337	$ 8,048,906
Capitalized interest	14,321	15,980	$ 3,732
Capitalization of internal use computer software	38,329	34,650	$ 29,407
Asset retirement obligations	34,537	30,831
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment	354,395	448,566
Buildings and building improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment	3,040,253	3,029,309
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment	969,273	852,022
Racking
Property, Plant and Equipment [Line Items]
Property, plant and equipment	2,083,199	2,040,832
Warehouse equipment/vehicles
Property, Plant and Equipment [Line Items]
Property, plant and equipment	499,787	483,218
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment	52,978	54,275
Computer hardware and software
Property, Plant and Equipment [Line Items]
Property, plant and equipment	746,993	689,261
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 499,459	$ 451,423
Minimum | Buildings and building improvements
Property, Plant and Equipment [Line Items]
Useful life	5 years
Minimum | Leasehold improvements
Property, Plant and Equipment [Line Items]
Useful life	5 years
Minimum | Racking
Property, Plant and Equipment [Line Items]
Useful life	1 year
Minimum | Warehouse equipment/vehicles
Property, Plant and Equipment [Line Items]
Useful life	1 year
Minimum | Furniture and fixtures
Property, Plant and Equipment [Line Items]
Useful life	1 year
Minimum | Computer hardware and software
Property, Plant and Equipment [Line Items]
Useful life	2 years
Maximum | Buildings and building improvements
Property, Plant and Equipment [Line Items]
Useful life	40 years
Maximum | Leasehold improvements
Property, Plant and Equipment [Line Items]
Useful life	10 years
Maximum | Racking
Property, Plant and Equipment [Line Items]
Useful life	20 years
Maximum | Warehouse equipment/vehicles
Property, Plant and Equipment [Line Items]
Useful life	10 years
Maximum | Furniture and fixtures
Property, Plant and Equipment [Line Items]
Useful life	10 years
Maximum | Computer hardware and software
Property, Plant and Equipment [Line Items]
Useful life	5 years

Summary of Significant Accoun_8

Summary of Significant Accounting Policies - Leases Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2020USD ($)leaserenewal_option	Dec. 31, 2019USD ($)	Jan. 01, 2019USD ($)
Lessee, Lease, Description [Line Items]
Renewal option | renewal_option			1
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201602Member	us-gaap:AccountingStandardsUpdate201409Member
Cumulative effect of new accounting principle in period of adoption	$ 1,862,463	$ 2,285,134	$ 1,136,729	$ 1,464,227
Total minimum lease payments			$ 3,354,702
Number of leases not yet commenced | lease			7
Total undiscounted lease payment			$ 236,200
Adjustment
Lessee, Lease, Description [Line Items]
Cumulative effect of new accounting principle in period of adoption	$ 5,781	$ (30,233)
Minimum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, term			5 years
Lessee, operating lease, renewal term			5 years
Lease operating lease, term			10 years
Minimum | Vehicle And Equipment
Lessee, Lease, Description [Line Items]
Lessee, operating lease, term			1 year
Maximum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, term			10 years
Lessee, operating lease, renewal term			1 year
Lease operating lease, term			25 years
Maximum | Vehicle And Equipment
Lessee, Lease, Description [Line Items]
Lessee, operating lease, term			7 years
ASU 2016-02 | Adjustment
Lessee, Lease, Description [Line Items]
Cumulative effect of new accounting principle in period of adoption					$ 5,800

Summary of Significant Accoun_9

Summary of Significant Accounting Policies - Supplemental Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Operating lease right-of-use assets	$ 2,196,502	$ 1,869,101	$ 0
Financing lease right-of-use assets, net of accumulated depreciation	310,534	327,215
Current
Operating lease liabilities	250,239	223,249
Financing lease liabilities	43,149	46,582
Long-term
Operating lease liabilities	2,044,598	1,728,686	$ 0
Financing lease liabilities	$ 323,162	$ 320,600
Operating lease, right-of-use asset, real estate assets, percent	99.00%
Operating lease, right-of-use asset, non-real estate assets, percent	1.00%
Finance lease, right-of-use asset, real estate assets, percent	72.00%	69.00%
Finance lease, right-of-use asset, non-real estate assets, percent	28.00%	31.00%
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent	us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent	us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:LongTermDebtAndCapitalLeaseObligations	us-gaap:LongTermDebtAndCapitalLeaseObligations

Summary of Significant Accou_10

Summary of Significant Accounting Policies - Leases Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Operating lease cost	$ 499,464	$ 459,619
Depreciation of financing lease right-of-use assets	51,629	59,258
Interest expense for financing lease liabilities	19,942	21,031
Variable lease costs	$ 111,501	$ 105,922
Operating leases, Remaining Lease Term	11 years 1 month 6 days	11 years
Finance leases, Remaining Lease Term	11 years 6 months	11 years 7 months 6 days
Operating leases, Discount Rate	6.90%	7.10%
Financing leases, Discount Rate	5.90%	5.70%

Summary of Significant Accou_11

Summary of Significant Accounting Policies - Estimated Future Lease Payments (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Leases, Operating [Abstract]
2021	$ 380,607
2022	362,970
2023	334,893
2024	307,039
2025	281,487
Thereafter	1,687,706
Total minimum lease payments	3,354,702
Less amounts representing interest or imputed interest	(1,059,865)
Present value of lease obligations	2,294,837
Lessee, Finance Sublease, Description [Abstract]
2021	(6,208)
2022	(5,752)
2023	(5,222)
2024	(3,771)
2025	(1,661)
Thereafter	(6,229)
Total minimum lease payments	(28,843)
Finance Lease, Liability, Payment, Due [Abstract]
2021	62,669
2022	54,499
2023	45,557
2024	38,051
2025	32,261
Thereafter	268,542
Total minimum lease payments	501,579
Less amounts representing interest or imputed interest	(135,268)
Present value of lease obligations	$ 366,311	$ 367,182

Summary of Significant Accou_12

Summary of Significant Accounting Policies - Supplemental Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Operating cash flows used in operating leases	$ 360,088	$ 338,059
Operating cash flows used in financing leases (interest)	19,942	21,031
Financing cash flows used in financing leases	47,829	58,033
Operating lease modifications and reassessments	143,382	108,023
New operating leases (including acquisitions and sale-leaseback transactions)	$ 370,011	$ 170,464

Summary of Significant Accou_13

Summary of Significant Accounting Policies - Long Lived Assets (Details) $ in Thousands	3 Months Ended			12 Months Ended
	Dec. 31, 2020USD ($)facility	Sep. 30, 2020USD ($)facility	Dec. 31, 2018USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consolidated gain on disposal/write-down of property, plant and equipment, net				$ 363,537	$ 63,824	$ 73,622
Gain on sale of real estate, net of tax			$ 63,800
Sale and sale-leaseback transactions	$ 342,100				67,800
(Gain) Loss on disposal/write-down of property, plant and equipment, net					36,000
Intangible impairments				$ 23,000	0	$ 0
Gain associated involuntary conversion			$ 8,800
14 Facilities In The United States
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale and sale-leaseback transactions	$ 265,600	$ 76,400
Number of facilities | facility	14	2
Iron Mountain Iron Cloud
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consolidated gain on disposal/write-down of property, plant and equipment, net					25,000
Intangible impairments					$ 15,700
Frankfurt JV
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on equity investment	$ 24,100

Summary of Significant Accou_14

Summary of Significant Accounting Policies - Goodwill and Other Indefinite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Goodwill impairment	$ 23,000	$ 23,000
Intangible impairments	$ 23	$ 23,000	$ 0	$ 0

Summary of Significant Accou_15

Summary of Significant Accounting Policies - Schedule of Carrying Value of Goodwill, by Reporting Unit (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Goodwill
Goodwill	$ 4,557,609	$ 4,485,209
GLOBAL RIM BUSINESS | North America RIM
Goodwill
Goodwill	2,719,182	2,715,550
GLOBAL RIM BUSINESS | Europe RIM
Goodwill
Goodwill	641,621	572,482
GLOBAL RIM BUSINESS | Latin America RIM
Goodwill
Goodwill	117,834	140,897
GLOBAL RIM BUSINESS | ANZ RIM
Goodwill
Goodwill	301,251	274,913
GLOBAL RIM BUSINESS | Asia RIM
Goodwill
Goodwill	244,294	239,059
GLOBAL DATA CENTER BUSINESS | Global Data Center
Goodwill
Goodwill	436,987	424,568
CORPORATE  AND OTHER BUSINESS | Fine Arts
Goodwill
Goodwill	15,176	37,533
CORPORATE  AND OTHER BUSINESS | Entertainment Services
Goodwill
Goodwill	35,159	34,102
CORPORATE  AND OTHER BUSINESS | Technology Escrow Services
Goodwill
Goodwill	$ 46,105	$ 46,105

Summary of Significant Accou_16

Summary of Significant Accounting Policies - Schedule of Changes in Carrying Value of Goodwill, by Reportable Operating Segment (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
Gross amount of goodwill [Roll Forward]
Beginning balance	$ 4,485,209	$ 4,485,209	$ 4,441,030
Tax deductible goodwill acquired during the year			16,450
Non-tax deductible goodwill acquired during the year		54,258	13,132
Goodwill impairment	(23,000)	(23,000)
Fair value and other adjustments		(3,412)	4,280
Currency effects		44,554	10,317
Ending balance		4,557,609	4,485,209
Accumulated goodwill impairment		158,420	135,420
GLOBAL RIM BUSINESS
Gross amount of goodwill [Roll Forward]
Beginning balance	3,942,901	3,942,901	3,899,210
Tax deductible goodwill acquired during the year			16,450
Non-tax deductible goodwill acquired during the year		54,258	11,228
Goodwill impairment		0
Fair value and other adjustments		(3,815)	4,439
Currency effects		30,838	11,574
Ending balance		4,024,182	3,942,901
Accumulated goodwill impairment		132,409	132,409
GLOBAL DATA CENTER BUSINESS
Gross amount of goodwill [Roll Forward]
Beginning balance	424,568	424,568	425,956
Tax deductible goodwill acquired during the year			0
Non-tax deductible goodwill acquired during the year		0	0
Goodwill impairment		0
Fair value and other adjustments		0	258
Currency effects		12,419	(1,646)
Ending balance		436,987	424,568
Accumulated goodwill impairment		0	0
CORPORATE  AND OTHER BUSINESS
Gross amount of goodwill [Roll Forward]
Beginning balance	$ 117,740	117,740	115,864
Tax deductible goodwill acquired during the year			0
Non-tax deductible goodwill acquired during the year		0	1,904
Goodwill impairment		(23,000)
Fair value and other adjustments		403	(417)
Currency effects		1,297	389
Ending balance		96,440	117,740
Accumulated goodwill impairment		$ 26,011	$ 3,011

Summary of Significant Accou_17

Summary of Significant Accounting Policies - Customer Relationships and Acquisition Costs and Other Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Amortizable intangible assets
NET CARRYING AMOUNT	$ 1,326,977	$ 1,393,183
Amortization	204,507	201,878	$ 186,774
Included in Depreciation and Amortization
Estimated amortization expense for existing intangible assets for the next five succeeding fiscal years
2021	168,756
2022	139,983
2023	135,262
2024	130,298
2025	127,771
Thereafter	625,052
Customer relationship intangible assets
Amortizable intangible assets
GROSS CARRYING AMOUNT	1,852,700	1,751,848
ACCUMULATED AMORTIZATION	(668,547)	(544,721)
NET CARRYING AMOUNT	$ 1,184,153	1,207,127
Customer relationship intangible assets | Minimum
Amortizable intangible assets
Useful life of finite-lived intangible assets	10 years
Customer relationship intangible assets | Maximum
Amortizable intangible assets
Useful life of finite-lived intangible assets	30 years
Customer Inducements
Amortizable intangible assets
GROSS CARRYING AMOUNT	$ 49,098	52,718
ACCUMULATED AMORTIZATION	(26,923)	(29,397)
NET CARRYING AMOUNT	$ 22,175	23,321
Customer Inducements, Current Record Management Vendor Or Payments To Customers | Minimum
Amortizable intangible assets
Useful life of finite-lived intangible assets	1 year
Customer Inducements, Current Record Management Vendor Or Payments To Customers | Maximum
Amortizable intangible assets
Useful life of finite-lived intangible assets	10 years
Customer relationship intangible assets
Amortizable intangible assets
Amortization	$ 117,514	117,972	113,782
Data center in-place leases and tenant relationships
Amortizable intangible assets
Amortization	42,637	46,696	43,061
Data center lease-based intangible assets
Amortizable intangible assets
GROSS CARRYING AMOUNT	269,988	265,945
ACCUMULATED AMORTIZATION	(149,339)	(103,210)
NET CARRYING AMOUNT	120,649	162,735
GROSS CARRYING AMOUNT	12,854	12,750
ACCUMULATED AMORTIZATION	(5,943)	(3,937)
NET CARRYING AMOUNT	6,911	8,813
Third-party commissions asset and other finite-lived intangible assets
Amortizable intangible assets
GROSS CARRYING AMOUNT	34,317	31,708
ACCUMULATED AMORTIZATION	(8,761)	(4,134)
NET CARRYING AMOUNT	25,556	27,574
Amortization	7,004	7,957	5,713
Customer inducements and data center above-market and below-market leases
Amortizable intangible assets
Amortization	9,878	$ 13,703	$ 16,281
Customer inducements and data center above-market and below-market leases | Amortization Expense Charged To Revenues
Estimated amortization expense for existing intangible assets for the next five succeeding fiscal years
2021	7,603
2022	5,010
2023	3,084
2024	1,453
2025	508
Thereafter	$ 842

Summary of Significant Accou_18

Summary of Significant Accounting Policies - Fair Value Measurements (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
QUOTED PRICES IN ACTIVE MARKETS (LEVEL 1)
Assets and liabilities carried at fair value measured on a recurring basis
Trading Securities	$ 10,636	$ 10,168
Derivative liability	0	0
QUOTED PRICES IN ACTIVE MARKETS (LEVEL 1) | Money Market Funds
Assets and liabilities carried at fair value measured on a recurring basis
Cash and cash equivalents	0	0
QUOTED PRICES IN ACTIVE MARKETS (LEVEL 1) | Time Deposits
Assets and liabilities carried at fair value measured on a recurring basis
Cash and cash equivalents	0
SIGNIFICANT OTHER OBSERVABLE INPUTS (LEVEL 2)
Assets and liabilities carried at fair value measured on a recurring basis
Trading Securities	256	564
Derivative liability	49,703	9,756
SIGNIFICANT OTHER OBSERVABLE INPUTS (LEVEL 2) | Money Market Funds
Assets and liabilities carried at fair value measured on a recurring basis
Cash and cash equivalents	62,657	13,653
SIGNIFICANT OTHER OBSERVABLE INPUTS (LEVEL 2) | Time Deposits
Assets and liabilities carried at fair value measured on a recurring basis
Cash and cash equivalents	2,121
SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3)
Assets and liabilities carried at fair value measured on a recurring basis
Trading Securities	0	0
Derivative liability	0	0
SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3) | Money Market Funds
Assets and liabilities carried at fair value measured on a recurring basis
Cash and cash equivalents	0	0
SIGNIFICANT UNOBSERVABLE INPUTS (LEVEL 3) | Time Deposits
Assets and liabilities carried at fair value measured on a recurring basis
Cash and cash equivalents	0
Estimated Fair Value
Assets and liabilities carried at fair value measured on a recurring basis
Trading Securities	10,892	10,732
Derivative liability	49,703	9,756
Estimated Fair Value | Money Market Funds
Assets and liabilities carried at fair value measured on a recurring basis
Cash and cash equivalents	62,657	$ 13,653
Estimated Fair Value | Time Deposits
Assets and liabilities carried at fair value measured on a recurring basis
Cash and cash equivalents	$ 2,121

Summary of Significant Accou_19

Summary of Significant Accounting Policies - Accumulated Other Comprehensive Income, Other Expenses, and Change in Accounting Pronouncements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other comprehensive loss:
Stockholders' equity, beginning balance	$ 1,464,227	$ 1,862,463	$ 2,285,134
Other comprehensive income (loss):
Foreign currency translation and other adjustments	46,635	11,866	(160,702)
Change in fair value of derivative instruments	(39,947)	(8,783)	(973)
Total other comprehensive (loss) income	6,688	3,083	(161,675)
Stockholders' equity, ending balance	1,136,729	1,464,227	1,862,463
FOREIGN CURRENCY TRANSLATION AND OTHER ADJUSTMENTS
Other comprehensive loss:
Stockholders' equity, beginning balance	(252,825)	(264,691)	(103,989)
Other comprehensive income (loss):
Foreign currency translation and other adjustments	46,635	11,866	(160,702)
Change in fair value of derivative instruments	0	0	0
Total other comprehensive (loss) income	46,635	11,866	(160,702)
Stockholders' equity, ending balance	(206,190)	(252,825)	(264,691)
CHANGE IN FAIR VALUE OF DERIVATIVE INSTRUMENTS
Other comprehensive loss:
Stockholders' equity, beginning balance	(9,756)	(973)	0
Other comprehensive income (loss):
Foreign currency translation and other adjustments	0	0	0
Change in fair value of derivative instruments	(39,947)	(8,783)	(973)
Total other comprehensive (loss) income	(39,947)	(8,783)	(973)
Stockholders' equity, ending balance	(49,703)	(9,756)	(973)
TOTAL
Other comprehensive loss:
Stockholders' equity, beginning balance	(262,581)	(265,664)	(103,989)
Other comprehensive income (loss):
Stockholders' equity, ending balance	$ (255,893)	$ (262,581)	$ (265,664)

Summary of Significant Accou_20

Summary of Significant Accounting Policies - Revenue - Contract Fulfillment Costs (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Intake Costs asset
Capitalized Contract Cost [Line Items]
GROSS CARRYING AMOUNT	$ 63,721	$ 41,224
ACCUMULATED AMORTIZATION	(33,352)	(23,579)
NET CARRYING AMOUNT	30,369	17,645
Commissions asset
Capitalized Contract Cost [Line Items]
GROSS CARRYING AMOUNT	91,069	68,008
ACCUMULATED AMORTIZATION	(38,787)	(27,178)
NET CARRYING AMOUNT	$ 52,282	$ 40,830

Summary of Significant Accou_21

Summary of Significant Accounting Policies - Revenue - Amortization Expense Associated with Commissions Asset and Intake Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Intake Costs asset
Capitalized Contract Cost [Line Items]
Amortization expense	$ 13,300	$ 10,144	$ 10,380
Commissions asset
Capitalized Contract Cost [Line Items]
Amortization expense	$ 24,052	$ 19,109	$ 13,838

Summary of Significant Accou_22

Summary of Significant Accounting Policies - Revenue - Estimated Amortization Expense for Contract Fulfillment Costs (Details) $ in Thousands	Dec. 31, 2020USD ($)
Accounting Policies [Abstract]
2021	$ 38,954
2022	24,861
2023	$ 18,836

Summary of Significant Accou_23

Summary of Significant Accounting Policies - Revenue - Summary of Deferred Revenue Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Deferred revenue - Current	$ 295,785	$ 274,036
Deferred revenue - Long-term	$ 35,612	$ 36,029

Summary of Significant Accou_24

Summary of Significant Accounting Policies - Revenue - Data Center (Details) $ in Thousands	Dec. 31, 2020USD ($)
Lessor, Lease, Description [Line Items]
2021	$ 6,208
2022	5,752
2023	5,222
2024	3,771
2025	1,661
Data Center
Lessor, Lease, Description [Line Items]
2021	225,554
2022	183,027
2023	142,787
2024	111,106
2025	$ 77,308

Summary of Significant Accou_25

Summary of Significant Accounting Policies - Revenue - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Capitalized Contract Cost [Line Items]
Storage rental	$ 2,754,091	$ 2,681,087	$ 2,622,455
Service	$ 1,393,179	1,581,497	1,603,306
Commissions asset
Capitalized Contract Cost [Line Items]
Capitalized contract cost, amortization period	3 years
Intake Costs asset
Capitalized Contract Cost [Line Items]
Capitalized contract cost, amortization period	3 years
GLOBAL DATA CENTER BUSINESS
Capitalized Contract Cost [Line Items]
Storage rental	$ 263,695	246,925	218,675
Service	15,617	10,226	10,308
GLOBAL DATA CENTER BUSINESS | Power and connectivity
Capitalized Contract Cost [Line Items]
Storage rental	$ 47,451	$ 43,269	$ 38,749

Summary of Significant Accou_26

Summary of Significant Accounting Policies - Stock-Based Compensation (Details) $ / shares in Units, $ in Thousands	Feb. 20, 2019	Dec. 31, 2020USD ($)offering_period$ / sharesshares	Dec. 31, 2019USD ($)$ / sharesshares	Dec. 31, 2018USD ($)$ / sharesshares
Employee stock-based awards
Contractual term of awards		3 years
Stock-based compensation | $		$ 37,674	$ 35,654	$ 31,167
Stock-based compensation expense (income), net of tax | $		$ 36,584	$ 33,103	28,998
Award vesting period		3 years
Total amount of common stock reserved and available for issuance pursuant to awards granted under the 2014 Plan (in shares)		48,253,839
Employee Stock Purchase Plan
Employee stock purchase plan, shares available for grant		2,818,706
Employee stock-based awards, unrecognized compensation costs on nonvested awards | $		$ 39,056
Employee stock-based awards, weighted average recognition period		1 year 8 months 12 days
Performance Units Original Awards
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options
Non-vested at the beginning of the period (in shares)		1,113,691
Granted (in shares)		425,777
Vested (in shares)		(316,730)
Forfeited (in shares)		(149,529)
Non-vested at the end of the period (in shares)		1,073,209	1,113,691
Restricted Stock Units (RSUs)
Aggregate intrinsic value
Total fair value of shares or units vested | $		$ 26,492	$ 21,191	20,454
PUs Adjustment
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options
Non-vested at the beginning of the period (in shares)		(314,798)
Granted (in shares)		0
Vested (in shares)		0
Forfeited (in shares)		(4,710)
Non-vested at the end of the period (in shares)		(319,508)	(314,798)
Performance Shares
Employee stock-based awards
Award vesting period		3 years
Aggregate intrinsic value
Total fair value of shares or units vested | $		$ 11,812	$ 6,503	$ 3,117
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options
Non-vested at the beginning of the period (in shares)		798,893
Granted (in shares)		425,777
Vested (in shares)		(316,730)
Forfeited (in shares)		(154,239)
Non-vested at the end of the period (in shares)		753,701	798,893
Weighted average grant date fair value
Weighted average grant date fair value, non-vested, beginning of period (in dollars per share) | $ / shares		$ 36.56
Weighted average grant date fair value, granted (in dollars per share) | $ / shares		34.85
Weighted average grant date fair value, vested (in dollars per share) | $ / shares		37.29
Weighted average grant date fair value, forfeited (in dollars per share) | $ / shares		28.28
Weighted average grant date fair value, non-vested, end of period (in dollars per share) | $ / shares		$ 36.98	$ 36.56
Performance units disclosure
Period of anniversary from the date of grant		3
Qualifying service period	10 years	3 years
Performance Shares | Two Thousand Sixteen
Performance units disclosure
Percentage of achievement of the predefined revenue and ROIC targets		100.00%
Performance Shares | Two Thousand Seventeen
Performance units disclosure
Percentage of achievement of the predefined revenue and ROIC targets			100.00%
Performance Shares | Two Thousand Eighteen
Performance units disclosure
Percentage of achievement of the predefined revenue and ROIC targets				0.00%
Performance Shares | Revenue or revenue growth and return on invested capital
Performance units disclosure
Performance period		3
Performance Shares | Minimum | Predefined Targets Of Revenue And Return On Invested Capital Or Adjusted EBITDA
Performance units disclosure
Percentage payout rate		0.00%
Performance Shares | Minimum | Market condition associated with shareholder return of common stock
Performance units disclosure
Percentage payout rate		0.00%
Performance Shares | Maximum | Predefined Targets Of Revenue And Return On Invested Capital Or Adjusted EBITDA
Performance units disclosure
Percentage payout rate		200.00%
Performance Shares | Maximum | Market condition associated with shareholder return of common stock
Performance units disclosure
Percentage payout rate		219.00%
Employee Stock Purchase Plan
Employee Stock Purchase Plan
Employee stock purchase plan, number of offering periods | offering_period		2
Employee stock purchase plan, offering periods		6 months
Employee stock purchase plan, duration of offering periods		6
Employee stock purchase plan, maximum employee subscription rate percent		15.00%
Percentage of market price for the purchase of shares		95.00%
Employee stock purchase plan, shares issued in period		159,853	129,505	119,123
Employee stock purchase plan, shares available for grant		216,287
Three Year Vesting Option
Employee stock-based awards
Contractual term of awards		10 years
Award vesting period		3 years
Stock And Cash Incentive Plan2014
Employee stock-based awards
Total amount of common stock reserved and available for issuance pursuant to awards granted under the 2014 Plan (in shares)		12,750,000
Employee And Non Employees Stock Option
Employee stock-based awards
Weighted average fair value of options granted (in dollars per share) | $ / shares		$ 2.35	$ 3.58	$ 3.50
Weighted average assumptions used for grants
Expected volatility (as a percent)		25.40%	24.30%	25.40%
Risk-free interest rate (as a percent)		1.45%	2.47%	2.65%
Expected dividend yield (as a percent)		7.00%	7.00%	7.00%
Expected life of the option		10 years	5 years	5 years
Summary of option activity
Options outstanding balance, beginning of period (in shares)		4,835,721
Options granted (in shares)		589,993
Options exercised (in shares)		(204,540)
Options forfeited (in shares)		(151,230)
Options expired (in shares)		(337,425)
Options outstanding balance, end of period (in shares)		4,732,519	4,835,721
Options exercisable balance (in shares)		3,439,748
Options expected to vest (in shares)		1,266,640
Weighted Average Exercise Price
Weighted average exercise price, options outstanding balance beginning of period (in dollars per share) | $ / shares		$ 35.64
Weighted average exercise price, options granted (in dollars per share) | $ / shares		33.32
Weighted average exercise price, options exercised (in dollars per share) | $ / shares		24.38
Weighted average exercise price, options forfeited (in dollars per share) | $ / shares		35.36
Weighted average exercise price, options expired (in dollars per share) | $ / shares		35.82
Weighted average exercise price, options outstanding balance end of period (in dollars per share) | $ / shares		35.83	$ 35.64
Weighted average exercise price, options exercisable (in dollars per share) | $ / shares		36.40
Weighted average exercise price, options expected to vest (in dollars per share) | $ / shares		$ 34.28
Weighted average remaining contractual term
Weighted average remaining contractual term, options outstanding		6 years 3 months 7 days
Weighted average remaining contractual term, options exercisable		5 years 5 months 15 days
Weighted average remaining contractual term, options expected to vest		8 years 4 months 28 days
Aggregate intrinsic value
Aggregate intrinsic value, options outstanding | $		$ 469
Aggregate intrinsic value, options exercisable | $		469
Aggregate intrinsic value, options expected to vest | $		$ 0
Restricted Stock And Restricted Stock Units
Employee stock-based awards
Award vesting period		3 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options
Non-vested at the beginning of the period (in shares)		1,203,599
Granted (in shares)		1,078,124
Vested (in shares)		(792,083)
Forfeited (in shares)		(195,634)
Non-vested at the end of the period (in shares)		1,294,006	1,203,599
Weighted average grant date fair value
Weighted average grant date fair value, non-vested, beginning of period (in dollars per share) | $ / shares		$ 34.71
Weighted average grant date fair value, granted (in dollars per share) | $ / shares		31.68
Weighted average grant date fair value, vested (in dollars per share) | $ / shares		33.45
Weighted average grant date fair value, forfeited (in dollars per share) | $ / shares		34.28
Weighted average grant date fair value, non-vested, end of period (in dollars per share) | $ / shares		$ 33.02	$ 34.71
Performance Units Original Awards
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options
Granted (in shares)			380,856	353,507

Summary of Significant Accou_27

Summary of Significant Accounting Policies - Other Expense (Income), Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Foreign currency transaction losses (gains), net	$ 29,830	$ 24,852	$ (15,567)
Debt extinguishment expense	68,300	0	0
Other, net(2)	45,415	9,046	3,875
Other Expense (Income), Net	$ 143,545	$ 33,898	$ (11,692)

Summary of Significant Accou_28

Summary of Significant Accounting Policies - Income (Loss) Per Share - Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income (Loss) Per Share-Basic and Diluted
Income (Loss) from Continuing Operations	$ 343,096	$ 268,211	$ 367,558
Less: Net income (loss) attributable to noncontrolling interests	403	938	1,198
Income (loss) from continuing operations (utilized in numerator of Earnings Per Share calculation)	342,693	267,273	366,360
Income (loss) from discontinued operations, net of tax	0	104	(12,427)
Net Income (Loss) Attributable to Iron Mountain Incorporated	$ 342,693	$ 267,377	$ 353,933
Weighted-average shares—basic (in shares)	288,183,000	286,971,000	285,913,000
Effect of dilutive potential stock options (in shares)	24,903	145,509	234,558
Effect of dilutive potential RSUs and PUs (in shares)	435,287	570,435	505,030
Weighted-average shares—diluted (in shares)	288,643,190	287,686,944	286,652,588
Earnings (losses) per share—basic:
Income (loss) from continuing operations (in dollars per share)	$ 1.19	$ 0.93	$ 1.28
(Loss) income from discontinued operations, net of tax (in dollars per share)	0	0	(0.04)
Net income (loss) attributable to iron mountain incorporated (in dollars per share)	1.19	0.93	1.24
Earnings (losses) per share—diluted:
Income (loss) from continuing operations (in dollars per share)	1.19	0.93	1.28
(Loss) income from discontinued operations, net of tax (in dollars per share)	0	0	(0.04)
Net Income (Loss) Attributable to Iron Mountain Incorporated (in dollars per share)	$ 1.19	$ 0.93	$ 1.23
Antidilutive stock options, RSUs and PUs, excluded from the calculation (in shares)	5,663,981	4,475,745	3,258,078

Acquisitions and Joint Ventur_3

Acquisitions and Joint Ventures - Narrative (Details) € in Thousands, £ in Thousands, $ in Thousands, $ in Thousands

Feb. 17, 2020USD ($)

Jan. 09, 2020USD ($)

May 25, 2018USD ($)

May 25, 2018EUR (€)

Mar. 08, 2018USD ($)data_center

Mar. 08, 2018GBP (£)data_center

Mar. 08, 2018SGD ($)data_center

Jan. 10, 2018USD ($)data_center

Feb. 28, 2019USD ($)

Mar. 31, 2020USD ($)

Dec. 31, 2019USD ($)company

Dec. 31, 2018USD ($)company

Jan. 08, 2020

OSG Investment

Business Acquisition [Line Items]

Ownership percentage

25.00%

Gain on equity investment

$ 10,000

OSG Acquisition

Business Acquisition [Line Items]

Ownership acquired

75.00%

Cash consideration

$ 95,500

Storage, Records Management And Art Storage Companies

Business Acquisition [Line Items]

Cash consideration

$ 29,100

$ 51,000

Storage, Records Management And Art Storage Companies | Maximum

Business Acquisition [Line Items]

Purchase price

12,500

Storage, Records Management And Art Storage Companies | Minimum

Business Acquisition [Line Items]

Purchase price

$ 700

Storage and Data Management Company

Business Acquisition [Line Items]

Number of companies acquired | company

10

11

Art Storage Company

Business Acquisition [Line Items]

Number of companies acquired | company

1

3

IO Data Center LLC

Business Acquisition [Line Items]

Cash consideration

$ 1,347,046

Purchase price

$ 1,347,000

$ 31,000

1,347,046

Number of data centers | data_center

4

EvoSwitch

Business Acquisition [Line Items]

Cash consideration

$ 222,000

€ 189,000

Potential additional payments to be made

$ 25,000

Credit Suisse Data Center Acquisition

Business Acquisition [Line Items]

Cash consideration

$ 111,400

£ 34,600

$ 81,000

Number of data centers | data_center

2

2

2

Other 2018 Individually Immaterial Business Acquisitions

Business Acquisition [Line Items]

Purchase price

98,100

Other 2018 Individually Immaterial Business Acquisitions | Maximum

Business Acquisition [Line Items]

Purchase price

34,100

Other 2018 Individually Immaterial Business Acquisitions | Minimum

Business Acquisition [Line Items]

Purchase price

$ 1,000

Acquisitions and Joint Ventur_4

Acquisitions and Joint Ventures - Schedule of Purchase Price Allocation (Details) € in Thousands, $ in Thousands	May 25, 2018USD ($)	May 25, 2018EUR (€)	Jan. 10, 2018USD ($)	Feb. 28, 2019USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Consideration paid for acquisitions
Accrued Purchase Price and Other Holdbacks					$ 0	$ 4,135	$ 35,218
Fair Value of Identifiable Assets Acquired:
Operating lease right-of-use assets					2,196,502	1,869,101	0
Operating Lease Liabilities					(2,044,598)	(1,728,686)	0
Goodwill Initially Recorded					4,557,609	4,485,209
Other Acquisitions
Consideration paid for acquisitions
Cash Paid (gross of cash acquired)					124,614	53,230	432,078
Accrued Purchase Price and Other Holdbacks					0	4,135	35,218
Fair Value of Investments Applied to Acquisitions					27,276	0	0
Total Consideration					151,890	57,365	467,296
Fair Value of Identifiable Assets Acquired:
Cash					6,545	2,260	10,227
Accounts Receivable, Prepaid Expenses and Other Assets					16,559	3,102	17,662
Property, Plant and Equipment					52,021	5,396	225,848
Customer Relationship Intangible Assets					79,065	22,071	44,622
Operating lease right-of-use assets					100,040	16,956	0
Data Center In-Place Leases					0	0	36,130
Data Center Tenant Relationships					0	0	18,410
Data Center Above-Market Leases					0	0	2,381
Debt Assumed					(27,363)	0	(12,312)
Accounts Payable, Accrued Expenses and Other Liabilities					(19,564)	(3,233)	(17,206)
Operating Lease Liabilities					(100,040)	(16,956)	0
Deferred Income Taxes					(9,631)	(1,813)	(43,218)
Data Center Below-Market Leases					0	0	(694)
Total Fair Value of Identifiable Net Assets Acquired					97,632	27,783	281,850
Goodwill Initially Recorded					54,258	29,582	185,446
IO Data Center LLC
Consideration paid for acquisitions
Cash Paid (gross of cash acquired)							1,347,046
Accrued Purchase Price and Other Holdbacks							0
Fair Value of Investments Applied to Acquisitions							0
Total Consideration			$ 1,347,000	$ 31,000			1,347,046
Fair Value of Identifiable Assets Acquired:
Cash							34,307
Accounts Receivable, Prepaid Expenses and Other Assets							7,070
Property, Plant and Equipment							863,027
Customer Relationship Intangible Assets							0
Operating lease right-of-use assets							0
Data Center In-Place Leases							104,340
Data Center Tenant Relationships							77,362
Data Center Above-Market Leases							16,439
Debt Assumed							0
Accounts Payable, Accrued Expenses and Other Liabilities							(36,230)
Operating Lease Liabilities							0
Deferred Income Taxes							0
Data Center Below-Market Leases							(11,421)
Total Fair Value of Identifiable Net Assets Acquired							1,054,894
Goodwill Initially Recorded							292,152
Series of Individually Immaterial Business Acquisitions and IODC
Consideration paid for acquisitions
Cash Paid (gross of cash acquired)							1,779,124
Accrued Purchase Price and Other Holdbacks							35,218
Fair Value of Investments Applied to Acquisitions							0
Total Consideration							1,814,342
Fair Value of Identifiable Assets Acquired:
Cash							44,534
Accounts Receivable, Prepaid Expenses and Other Assets							24,732
Property, Plant and Equipment							1,088,875
Customer Relationship Intangible Assets							44,622
Data Center In-Place Leases							140,470
Data Center Tenant Relationships							95,772
Data Center Above-Market Leases							18,820
Debt Assumed							(12,312)
Accounts Payable, Accrued Expenses and Other Liabilities							(53,436)
Deferred Income Taxes							(43,218)
Data Center Below-Market Leases							(12,115)
Total Fair Value of Identifiable Net Assets Acquired							1,336,744
Goodwill Initially Recorded							477,598
Cash paid for previous acquisition					$ 512	$ 7,267	23,967
EvoSwitch
Consideration paid for acquisitions
Cash Paid (gross of cash acquired)	$ 222,000	€ 189,000
Accrued Purchase Price and Other Holdbacks							$ 18,824
Customer relationship intangible assets
Fair Value of Identifiable Assets Acquired:
Acquired finite-lived intangible assets, weighted average useful life					14 years	16 years	10 years
Data center in-place leases
Fair Value of Identifiable Assets Acquired:
Acquired finite-lived intangible assets, weighted average useful life							6 years
Data center tenant relationships
Fair Value of Identifiable Assets Acquired:
Acquired finite-lived intangible assets, weighted average useful life							9 years
Data center above-market leases
Fair Value of Identifiable Assets Acquired:
Acquired finite-lived intangible assets, weighted average useful life							3 years
Data center below-market leases
Fair Value of Identifiable Assets Acquired:
Acquired finite-lived intangible assets, weighted average useful life							7 years

Acquisitions and Joint Ventur_5

Acquisitions and Joint Ventures - Joint Ventures (Details) ft² in Thousands, $ in Thousands	1 Months Ended	3 Months Ended		12 Months Ended
	Oct. 31, 2020USD ($)ft²MW	Jun. 30, 2021USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Jun. 30, 2020USD ($)
Business Acquisition [Line Items]
Proceeds from sale of assets				$ 564,664	$ 166,143	$ 86,159
Frankfurt JV
Business Acquisition [Line Items]
Equity interest	20.00%
Proceeds from sale of assets	$ 105,000		$ 93,300
Gain on sale of assets	$ 24,100
Fair value of investment			23,300	23,300
Equity method investments			$ 26,500	$ 26,500
Frankfurt JV | Forecast
Business Acquisition [Line Items]
Proceeds from sale of assets		$ 11,700
Frankfurt JV | A G C Equity Partners
Business Acquisition [Line Items]
Area of real estate property | ft²	280
Equity interest	80.00%
Power of building | MW	27
MakeSpace JV
Business Acquisition [Line Items]
Equity funding							$ 36,000
Equity funding capital contribution							$ 45,000
Equity interest Percentage capital contribution			39.00%	39.00%	34.00%
Carrying value of investment capital contribution			$ 16,924	$ 16,924	$ 18,570

Divestments - Additional Inform

Divestments - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Investments in joint ventures			$ 18,250	$ 19,222	$ 0
Disposal Group, Not Discontinued Operations | Consumer Storage
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on divestiture		$ 4,200
Corporate Joint Venture | Makespace
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Investments in joint ventures	$ 20,000
Equity interest	34.00%	34.00%

Derivative Instruments and He_3

Derivative Instruments and Hedging Activities - Interest Rate Swap Agreements (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019	Jul. 31, 2019
Interest Rate Swap Agreements
Derivative [Line Items]
Notional amount of derivatives	$ 350,000,000	$ 350,000,000	$ 350,000,000

Derivative Instruments and He_4

Derivative Instruments and Hedging Activities - Cross-Currency Swap Agreements Designated as a Hedge of Net Investment (Details) - Net Investment Hedging - Cross-currency swap agreements € in Thousands, $ in Thousands	Sep. 30, 2020USD ($)	Sep. 30, 2020EUR (€)	Aug. 31, 2019USD ($)	Aug. 31, 2019EUR (€)
Derivative [Line Items]
Notional amount	$ 359,200	€ 300,000	$ 110,000	€ 99,055
Interest rate	4.50%	4.50%	6.00%	6.00%
Weighted average interest rate	3.40%	3.40%	3.65%	3.65%
Notional amount of derivatives	$ 359,200	€ 300,000	$ 110,000	€ 99,055

Derivative Instruments and He_5

Derivative Instruments and Hedging Activities - Foreign Exchange Currency Forward Contracts Not Designated as Hedging Instruments (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jul. 31, 2019
Derivative [Line Items]
Cash flow hedge, interest rate swap agreements	$ (39,947,000)	$ (8,783,000)	$ (973,000)
Foreign Exchange Currency Forward Contracts	17,005,000	6,003,000	11,070,000
Net Investment Hedging
Derivative [Line Items]
Cumulative net losses	28,641,000
Interest Rate Swap Agreements
Derivative [Line Items]
Notional amount of derivatives	350,000,000	350,000,000		$ 350,000,000
Cumulative net losses	21,062,000
Interest Rate Swap Agreements | Cash Flow Hedging
Derivative [Line Items]
Derivative liability	(21,062,000)	(8,774,000)
Interest Rate Swap Agreements | Designated Hedging Instruments
Derivative [Line Items]
Cash flow hedge, interest rate swap agreements	12,288,000	7,801,000	973,000
August 2023 Cross Currency Swap Agreements | Net Investment Hedging
Derivative [Line Items]
Derivative liability	(8,229,000)	(982,000)
August 2023 Cross Currency Swap Agreements | Designated Hedging Instruments | Net Investment Hedging
Derivative [Line Items]
Net investment hedge, currency swap agreements	7,247,000	982,000	0
February 2026 Cross Currency Swap Agreements | Net Investment Hedging
Derivative [Line Items]
Derivative liability	(20,412,000)	0
February 2026 Cross Currency Swap Agreements | Designated Hedging Instruments | Net Investment Hedging
Derivative [Line Items]
Net investment hedge, currency swap agreements	20,412,000	0	0
Foreign exchange contracts
Derivative [Line Items]
Net payments	0	737,000	5,797,000
Foreign exchange contracts | Derivatives Not Designated as Hedging Instruments
Derivative [Line Items]
Notional amount of derivatives	0	0
Foreign Exchange Currency Forward Contracts	$ 0	$ 737,000	$ 4,954,000

Derivative Instruments and He_6

Derivative Instruments and Hedging Activities - Euro Notes Designated as a Hedge of Net Investment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative [Line Items]
Foreign exchange losses (gains) associated with net investment hedge	$ 17,005	$ 6,003	$ 11,070
Cumulative net gains	46,635	11,866	(160,702)
Euro Notes | Designated Hedging Instruments | Net Investment Hedging
Derivative [Line Items]
Hedged notes	300,000	$ 284,986	$ 224,424
Cumulative net gains	$ 3,256

Debt - Schedule of Long Term De

Debt - Schedule of Long Term Debt (Details) $ in Thousands	Dec. 31, 2020USD ($)	Dec. 31, 2020AUD ($)	Jun. 30, 2020	Jun. 29, 2020	Dec. 31, 2019USD ($)
Debt Instrument [Line Items]
Debt (inclusive of discount)	$ 8,797,424,000				$ 8,751,544,000
Net Deferred Financing Costs	(94,110,000)				(86,965,000)
Total Long-term Debt (including current portion)	8,703,314,000				8,664,579,000
Debt, current portion	(193,759,000)				(389,013,000)
Carrying amount, current portion	(193,759,000)				(389,013,000)
Long-term debt, net of current portion	8,603,665,000				8,362,531,000
Unamortized deferred financing costs	(94,110,000)				(86,965,000)
Long-term debt, net of current portion	$ 8,509,555,000				8,275,566,000
Capital stock of subsidiaries pledged to secure debt (as a percent)	66.00%	66.00%
Unamortized original issue discount	$ 1,991,000
Capital lease obligations	366,311,000				367,182,000
Unamortized debt issuance expense, net of current portion	0				0
Australian Dollar Term Loan
Debt Instrument [Line Items]
Debt (inclusive of discount)	243,152,000	$ 350,000			226,924,000
Net Deferred Financing Costs	(1,624,000)				(2,313,000)
Total Long-term Debt (including current portion)	241,528,000				224,611,000
Fair value	244,014,000				228,156,000
Unamortized original issue discount	$ 862,000				1,232,000
Euro Senior Notes 3 Percent due 2025
Debt Instrument [Line Items]
Stated interest rate (as a percent)	3.00%	3.00%
Debt (inclusive of discount)	$ 0				336,468,000
Net Deferred Financing Costs	0				(3,462,000)
Total Long-term Debt (including current portion)	0				333,006,000
Fair value	$ 0				345,660,000
GBP Senior Notes 3.875 Percent due 2025
Debt Instrument [Line Items]
Stated interest rate (as a percent)	3.875%	3.875%
Debt (inclusive of discount)	$ 546,003,000				527,432,000
Net Deferred Financing Costs	(4,983,000)				(5,809,000)
Total Long-term Debt (including current portion)	541,020,000				521,623,000
Fair value	$ 553,101,000				539,892,000
Senior Notes 5.375 Percent due 2026
Debt Instrument [Line Items]
Stated interest rate (as a percent)	5.375%	5.375%
Debt (inclusive of discount)	$ 0				250,000,000
Net Deferred Financing Costs	0				(2,756,000)
Total Long-term Debt (including current portion)	0				247,244,000
Fair value	$ 0				261,641,000
47/8% Notes due 2027
Debt Instrument [Line Items]
Stated interest rate (as a percent)	4.875%	4.875%
Debt (inclusive of discount)	$ 1,000,000,000				1,000,000,000
Net Deferred Financing Costs	(9,598,000)				(11,020,000)
Total Long-term Debt (including current portion)	990,402,000				988,980,000
Fair value	$ 1,046,250,000				1,029,475,000
Senior Notes 4.875 Percent due 2029
Debt Instrument [Line Items]
Stated interest rate (as a percent)	5.25%	5.25%
Debt (inclusive of discount)	$ 825,000,000				825,000,000
Net Deferred Financing Costs	(8,561,000)				(9,742,000)
Total Long-term Debt (including current portion)	816,439,000				815,258,000
Fair value	$ 868,313,000				859,598,000
5% Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)	5.00%	5.00%
Debt (inclusive of discount)	$ 500,000,000				0
Net Deferred Financing Costs	(5,486,000)				0
Total Long-term Debt (including current portion)	494,514,000				0
Fair value	$ 523,125,000				0
47/8% Notes due 2029
Debt Instrument [Line Items]
Stated interest rate (as a percent)	4.875%	4.875%
Debt (inclusive of discount)	$ 1,000,000,000				1,000,000,000
Net Deferred Financing Costs	(12,658,000)				(14,104,000)
Total Long-term Debt (including current portion)	987,342,000				985,896,000
Fair value	$ 1,050,000,000				1,015,640,000
51/4% Notes due 2030
Debt Instrument [Line Items]
Stated interest rate (as a percent)	5.25%	5.25%
Debt (inclusive of discount)	$ 1,300,000,000				0
Net Deferred Financing Costs	(14,416,000)				0
Total Long-term Debt (including current portion)	1,285,584,000				0
Fair value	$ 1,400,750,000				0
41/2% Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)	4.50%	4.50%
Debt (inclusive of discount)	$ 1,100,000,000				0
Net Deferred Financing Costs	(12,648,000)				0
Total Long-term Debt (including current portion)	1,087,352,000				0
Fair value	$ 1,138,500,000				0
55/8% Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)	5.625%	5.625%
Debt (inclusive of discount)	$ 600,000,000				0
Net Deferred Financing Costs	(6,727,000)				0
Total Long-term Debt (including current portion)	593,273,000				0
Fair value	660,000,000				0
Accounts Receivable Securitization Program
Debt Instrument [Line Items]
Debt (inclusive of discount)	85,000,000				272,062,000
Net Deferred Financing Costs	(152,000)				(81,000)
Total Long-term Debt (including current portion)	84,848,000				271,981,000
Fair value	$ 85,000,000				$ 272,062,000
Mortgages
Debt Instrument [Line Items]
Stated interest rate (as a percent)	3.30%	3.30%			3.90%
Long term debt fair value	$ 71,673,000				$ 77,036,000
Other Notes And Obligations
Debt Instrument [Line Items]
Long term debt fair value	$ 73,938,000				$ 129,453,000
Weighted average interest rate (as a percent)	10.70%	10.70%			10.80%
Mortgage Securitization Program
Debt Instrument [Line Items]
Fair value	$ 50,000,000				$ 50,000,000
Capital Lease Obligations
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	5.90%	5.90%			5.70%
Credit Agreement
Debt Instrument [Line Items]
Capital stock of subsidiaries pledged to secure debt (as a percent)	66.00%	66.00%
Real Estate Mortgages, Finance Lease Liabilities And Other
Debt Instrument [Line Items]
Debt (inclusive of discount)	$ 511,922,000				$ 573,671,000
Net Deferred Financing Costs	(1,086,000)				(1,388,000)
Total Long-term Debt (including current portion)	510,836,000				572,283,000
Fair value	511,922,000				623,671,000
Long term debt fair value	511,922,000				573,671,000
New Credit Agreement | Revolving Credit Facility
Debt Instrument [Line Items]
Debt (inclusive of discount)	0				348,808,000
Net Deferred Financing Costs	(8,620,000)				(12,053,000)
Total Long-term Debt (including current portion)	(8,620,000)				336,755,000
Fair value	0				348,808,000
New Credit Agreement | Term Loan Facility
Debt Instrument [Line Items]
Debt (inclusive of discount)	250,000,000
Term Loan A | Term Loan Facility
Debt Instrument [Line Items]
Debt (inclusive of discount)	215,625,000				228,125,000
Net Deferred Financing Costs	0				0
Total Long-term Debt (including current portion)	215,625,000				228,125,000
Fair value	215,625,000				228,125,000
Term Loan B | Term Loan Facility
Debt Instrument [Line Items]
Debt (inclusive of discount)	679,621,000				686,395,000
Net Deferred Financing Costs	(6,244,000)				(7,493,000)
Total Long-term Debt (including current portion)	673,377,000				678,902,000
Fair value	680,750,000				686,890,000
Unamortized original issue discount	1,129,000				1,355,000
UK Bilateral Revolving Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Debt (inclusive of discount)	191,101,000				184,601,000
Net Deferred Financing Costs	(1,307,000)				(1,801,000)
Total Long-term Debt (including current portion)	189,794,000				182,800,000
Fair value	$ 191,101,000				184,601,000
Senior Notes 4.375 Percent due 2021 | Senior Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)	4.375%	4.375%
Debt (inclusive of discount)	$ 0				500,000,000
Net Deferred Financing Costs	0				(2,436,000)
Total Long-term Debt (including current portion)	0				497,564,000
Fair value	$ 0				503,450,000
Senior Notes 6 Percent Due 2023 | Senior Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)	6.00%	6.00%	6.00%	6.00%
Debt (inclusive of discount)	$ 0				600,000,000
Net Deferred Financing Costs	0				(4,027,000)
Total Long-term Debt (including current portion)	0				595,973,000
Fair value	$ 0				613,500,000
CAD 5.375 Percent Senior Notes due 2023 | Senior Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)	5.375%	5.375%
Debt (inclusive of discount)	$ 0				192,058,000
Net Deferred Financing Costs	0				(2,071,000)
Total Long-term Debt (including current portion)	0				189,987,000
Fair value	$ 0				199,380,000
Senior Subordinated Notes 5.75 Percent due 2024 | Senior Notes
Debt Instrument [Line Items]
Stated interest rate (as a percent)	5.75%	5.75%
Debt (inclusive of discount)	$ 0				1,000,000,000
Net Deferred Financing Costs	0				(6,409,000)
Total Long-term Debt (including current portion)	0				993,591,000
Fair value	$ 0				$ 1,010,625,000

Debt - Credit Agreement Narrati

Debt - Credit Agreement Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Debt	$ 8,797,424,000	$ 8,751,544,000
New Credit Agreement
Debt Instrument [Line Items]
Average interest rate	1.90%	3.30%
Revolving Credit Facility
Debt Instrument [Line Items]
Letters of credit outstanding	$ 3,232,000
Period of earnings before interest, taxes, depreciation, amortization and rent expense (EBITDAR) for calculation of remaining borrowing capacity	12 months
Remaining amount available for borrowing under credit facility	$ 1,746,768,000
Revolving Credit Facility | New Credit Agreement
Debt Instrument [Line Items]
Maximum borrowing capacity	1,750,000,000
Optional additional commitments	1,260,000,000
Debt	0	$ 348,808,000
Average interest rate		3.20%
Term Loan Facility | New Credit Agreement
Debt Instrument [Line Items]
Debt	250,000,000
Amount of quarterly installments based on the original principal	3,125,000
Term Loan Facility | Term Loan A
Debt Instrument [Line Items]
Debt	$ 215,625,000	$ 228,125,000
Average interest rate	1.90%	3.50%
Term Loan Facility | Term Loan B
Debt Instrument [Line Items]
Debt	$ 679,621,000	$ 686,395,000
Minimum | New Credit Agreement
Debt Instrument [Line Items]
Commitment fee percentage	0.25%
Maximum | New Credit Agreement
Debt Instrument [Line Items]
Commitment fee percentage	0.40%
Term Loan Facility | Loans Payable | Term Loan B
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 700,000,000
Debt	$ 679,621,000
Par	99.75%
Quarterly payment amount	$ 1,750,000
Stated interest rate (as a percent)	1.90%	3.60%
Term Loan Facility | Loans Payable | Term Loan B | LIBOR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.75%

Debt - Notes Issued Under Inden

Debt - Notes Issued Under Indentures Narrative (Details) € in Thousands, £ in Thousands, $ in Thousands	Aug. 21, 2020USD ($)	Aug. 21, 2020CAD ($)	Aug. 21, 2020EUR (€)	Aug. 18, 2020USD ($)	Jul. 02, 2020USD ($)	Jun. 29, 2020USD ($)	Jun. 22, 2020USD ($)	Sep. 30, 2020USD ($)	Jun. 30, 2020USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2020GBP (£)
Debt Instrument [Line Items]
Debt (inclusive of discount)										$ 8,797,424,000	$ 8,751,544,000
Repurchase price in the event of change of control, percentage of principal plus accrued and unpaid interest										101.00%			101.00%
Net proceeds from sales of senior notes										$ 3,465,000,000	987,500,000	$ 0
Loss on early extinguishment of debt										$ 68,300,000	0	$ 0
Senior Notes
Debt Instrument [Line Items]
Redemption price, percentage							100.00%			100.00%
Net proceeds from sales of senior notes							$ 2,376,000,000
Loss on early extinguishment of debt								$ 35,950,000	$ 17,040,000
Senior Notes | GBP Notes
Debt Instrument [Line Items]
Debt (inclusive of discount) | £													£ 400,000
Senior Notes | 47/8% Notes due 2027
Debt Instrument [Line Items]
Debt (inclusive of discount)										$ 1,000,000,000
Senior Notes | 51/4% Notes due 2028
Debt Instrument [Line Items]
Debt (inclusive of discount)										825,000,000
Principal Amount							1,300,000,000
Senior Notes | 5% Notes
Debt Instrument [Line Items]
Debt (inclusive of discount)										$ 500,000,000
Principal Amount							500,000,000
Stated interest rate (as a percent)										5.00%			5.00%
Senior Notes | 47/8% Notes due 2029
Debt Instrument [Line Items]
Debt (inclusive of discount)										$ 1,000,000,000
Senior Notes | 51/4% Notes due 2030
Debt Instrument [Line Items]
Debt (inclusive of discount)										1,300,000,000
Senior Notes | 41/2% Notes
Debt Instrument [Line Items]
Debt (inclusive of discount)										1,100,000,000
Redemption price, percentage				100.00%
Principal Amount				$ 1,100,000,000
Net proceeds from sales of senior notes				$ 1,089,000,000
Senior Notes | 55/8% Notes
Debt Instrument [Line Items]
Debt (inclusive of discount)										600,000,000
Principal Amount							$ 600,000,000
Senior Notes | Senior Notes 4.375 Percent due 2021
Debt Instrument [Line Items]
Debt (inclusive of discount)										$ 0	500,000,000
Redemption price, percentage						100.00%
Stated interest rate (as a percent)										4.375%			4.375%
Aggregate principal amount outstanding						$ 500,000,000
Senior Notes | Senior Notes 6 Percent Due 2023
Debt Instrument [Line Items]
Debt (inclusive of discount)										$ 0	600,000,000
Redemption price, percentage						102.00%
Stated interest rate (as a percent)						6.00%			6.00%	6.00%			6.00%
Aggregate principal amount outstanding						$ 600,000,000
Senior Notes | Senior Subordinated Notes 5.75 Percent due 2024
Debt Instrument [Line Items]
Debt (inclusive of discount)										$ 0	1,000,000,000
Redemption price, percentage					100.958%
Stated interest rate (as a percent)										5.75%			5.75%
Aggregate principal amount outstanding					$ 1,000,000
Loss on early extinguishment of debt								$ 15,310,000
Senior Notes | Senior CAD Notes
Debt Instrument [Line Items]
Redemption price, percentage	104.031%	104.031%	104.031%
Aggregate principal amount outstanding		$ 250,000
Senior Notes | CAD 5.375 Percent Senior Notes due 2023
Debt Instrument [Line Items]
Debt (inclusive of discount)										$ 0	$ 192,058,000
Redemption price, percentage	106.628%	106.628%	106.628%
Stated interest rate (as a percent)										5.375%			5.375%
Aggregate principal amount outstanding	$ 250,000,000
Senior Notes | Senior Euro Notes
Debt Instrument [Line Items]
Redemption price, percentage	101.50%	101.50%	101.50%
Aggregate principal amount outstanding | €			€ 300,000

Debt - Australian Dollar Term L

Debt - Australian Dollar Term Loan (Details) $ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020AUD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2020AUD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2019AUD ($)
Debt Instrument [Line Items]
Debt (inclusive of discount)		$ 8,797,424		$ 8,751,544
Australian Dollar Term Loan
Debt Instrument [Line Items]
Debt (inclusive of discount)		$ 243,152	$ 350,000	226,924
Par		99.00%	99.00%
Amount of quarterly installments based on the original principal	$ 8,750
Australian Dollar Term Loan | BBSY
Debt Instrument [Line Items]
Debt (inclusive of discount)		$ 244,014	$ 316,563	$ 228,156	$ 325,313
Debt instrument, basis spread on variable rate	3.875%
Effective interest rate (as a percent)		3.90%	3.90%	4.80%	4.80%

Debt - UK Bilateral Revolving C

Debt - UK Bilateral Revolving Credit Facility (Details) - UK Bilateral Revolving Credit Facility - GBP (£)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Effective interest rate (as a percent)	2.30%	3.10%
Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	£ 140,000,000
Optional additional commitments	£ 125,000,000
Debt instrument, basis spread on variable rate	2.25%

Debt - Accounts Receivable and

Debt - Accounts Receivable and Mortgage Securitization Program Narrative (Details) - Accounts Receivable Securitization Program - USD ($)	12 Months Ended
	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 300,000,000	$ 275,000,000
Secured Debt
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 274,100,000		272,062,000
Line of credit	$ 85,000,000		$ 272,062,000
Effective interest rate (as a percent)	1.10%		2.80%
Commitment fee percentage	0.40%

Debt - Cash Pooling (Details)

Debt - Cash Pooling (Details)	12 Months Ended
	Dec. 31, 2020USD ($)cash_pool	Dec. 31, 2019USD ($)
Debt Instrument [Line Items]
Number of cash pools | cash_pool	2
Credit Agreement
Debt Instrument [Line Items]
Letters of credit outstanding	$ 36,160,000
Credit Agreement | Revolving Credit Facility
Debt Instrument [Line Items]
Letters of credit outstanding	$ 3,232,000
QRS Cash Pool
Debt Instrument [Line Items]
Number of cash pools | cash_pool	1
Cash Pool Agreement, Borrowings, Maximum	$ 10,000,000
GROSS CASH POSITION	448,700,000	$ 372,100,000
OUTSTANDING DEBIT BALANCES	(447,400,000)	(369,000,000)
NET CASH POSITION	$ 1,300,000	3,100,000
TRS Cash Pool
Debt Instrument [Line Items]
Number of cash pools | cash_pool	1
GROSS CASH POSITION	$ 555,500,000	319,800,000
OUTSTANDING DEBIT BALANCES	(553,500,000)	(301,300,000)
NET CASH POSITION	$ 2,000,000	$ 18,500,000

Debt - Maturities of Long Term

Debt - Maturities of Long Term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Debt Disclosure [Abstract]
2021	$ 193,759
2022	536,811
2023	232,264
2024	45,680
2025	569,005
Thereafter	7,221,896
Long-term Debt, Excluding Unamortized (Discount) Premium and Debt Issuance Costs, and Current Maturities	8,799,415
Net Discounts	(1,991)
Net Deferred Financing Costs	(94,110)	$ (86,965)
Total Long-term Debt (including current portion)	$ 8,703,314	$ 8,664,579

Commitments and Contingencies -

Commitments and Contingencies - Purchase Commitments (Details) $ in Thousands	Dec. 31, 2020USD ($)
Commitments and Contingencies Disclosure [Abstract]
2021	$ 189,855
2022	45,339
2023	31,507
2024	28,269
2025	25,554
Thereafter	322
Total	$ 320,846

Commitments and Contingencies_2

Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Self-insured accrual	$ 47,959	$ 43,127

Stockholders' Equity Matters -

Stockholders' Equity Matters - Dividends Declared (Details) - USD ($) $ / shares in Units, $ in Thousands	Feb. 24, 2021	Dec. 15, 2020	Nov. 04, 2020	Sep. 15, 2020	Aug. 05, 2020	Jun. 15, 2020	May 05, 2020	Mar. 16, 2020	Feb. 13, 2020	Dec. 16, 2019	Oct. 31, 2019	Sep. 16, 2019	Jul. 26, 2019	Jun. 17, 2019	May 22, 2019	Mar. 15, 2019	Feb. 07, 2019	Dec. 17, 2018	Oct. 25, 2018	Sep. 17, 2018	Jul. 24, 2018	Jun. 15, 2018	May 24, 2018	Mar. 15, 2018	Feb. 14, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Class of Stock [Line Items]
Dividends per share (in dollars per share)			$ 0.6185		$ 0.6185		$ 0.6185		$ 0.6185		$ 0.6185		$ 0.6110		$ 0.6110		$ 0.6110		$ 0.6110		$ 0.5875		$ 0.5875		$ 0.5875	$ 2.47	$ 2.45	$ 2.38
Dividends declared		$ 178,290		$ 178,224		$ 178,212		$ 178,047		$ 177,687		$ 175,434		$ 175,389		$ 175,242		$ 174,935		$ 168,148		$ 168,078		$ 167,969		$ 718,136	$ 708,561	$ 683,519
Amount of declared distributions																										$ 712,773	$ 703,752	$ 679,130
Subsequent Event
Class of Stock [Line Items]
Dividends per share (in dollars per share)	$ 0.6185

Stockholders' Equity Matters _2

Stockholders' Equity Matters - Classification of Dividends Paid (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Class of Stock [Line Items]
Percent of dividends paid	100.00%	100.00%	100.00%
Nonqualified ordinary dividends
Class of Stock [Line Items]
Percent of dividends paid	43.00%	54.80%	83.00%
Qualified ordinary dividends
Class of Stock [Line Items]
Percent of dividends paid	0.00%	4.50%	4.80%
Capital gains
Class of Stock [Line Items]
Percent of dividends paid	49.50%	14.70%	5.80%
Return of capital
Class of Stock [Line Items]
Percent of dividends paid	7.50%	26.00%	6.40%

Stockholders' Equity Matters _3

Stockholders' Equity Matters - Additional Information (Details) $ in Thousands	Dec. 12, 2017bankshares	Jan. 31, 2018USD ($)shares	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Class of Stock [Line Items]
Percent of dividends paid			100.00%	100.00%	100.00%
Equity Offering
Class of Stock [Line Items]
Number of banks | bank	16
Sale of stock, number of shares issued in transaction (in shares)	14,500,000
Over-Allotment Option
Class of Stock [Line Items]
Sale of stock, number of shares issued in transaction (in shares)		2,175,000
Sale of stock, consideration received on transaction | $		$ 76,200
Capital gains
Class of Stock [Line Items]
Percent of dividends paid			49.50%	14.70%	5.80%

Income Taxes - Significant Comp

Income Taxes - Significant Components To Deferred Tax Assets and Deferred Tax Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deferred Tax Assets:
Accrued liabilities and other adjustments	$ 52,527	$ 53,197
Net operating loss carryforwards	96,710	99,240
Federal benefit of unrecognized tax benefits	0	3,039
Valuation allowance	(46,938)	(60,003)
Deferred tax assets	102,299	95,473
Deferred Tax Liabilities:
Other assets, principally due to differences in amortization	(186,682)	(177,645)
Plant and equipment, principally due to differences in depreciation	(59,711)	(67,515)
Other	(29,265)	(21,903)
Deferred tax liabilities	(275,658)	(267,063)
Net deferred tax liability	$ (173,359)	$ (171,590)

Income Taxes - Current and Nonc

Income Taxes - Current and Noncurrent Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Income Tax Contingency [Line Items]
Deferred income taxes	$ (198,377)	$ (188,128)
Other assets, net
Income Tax Contingency [Line Items]
Noncurrent deferred tax assets (Included in Other, a component of Other assets, net)	$ 25,018	$ 16,538

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Tax carryforwards
Net operating loss carryforwards, tax effected	$ 96,710	$ 99,240
Effective tax rate	7.90%	18.30%	10.40%
Federal tax rate	21.00%
Tax adjustment relating to REIT	$ 60,378	$ 40,577	$ 35,165
Foreign tax rate differential provision (benefit)	9,472	8,562	1,031
Tax benefit as a result of the resolution of a tax matter			(14,000)
Increase in valuation allowance (net operating losses)	8,337	(6,211)	(3,568)
Incremental foreign earnings	262,379
Increase in gross interest and penalties recorded	1,499	1,780	1,961
Accrued interest and penalties recorded	6,212	9,282
Unrecognized tax benefits	25,969	35,068	$ 35,320	$ 38,533
Unrecognized tax benefits included in other long-term liabilities	23,402	31,992
Deferred income taxes including unrecognized tax benefits	2,567	$ 3,076
Unrecognized tax benefits that would impact tax rate	2,989
Foreign
Tax carryforwards
Net operating loss carryforwards, tax effected	$ 92,142
Net operating loss carryforwards subject to valuation allowance (as a percent)	43.00%

Income Taxes - Rollforward of V

Income Taxes - Rollforward of Valuation Allowance (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Roll forward of valuation allowance:
BALANCE AT BEGINNING OF THE YEAR	$ 60,003
BALANCE AT END OF THE YEAR	46,938	$ 60,003
Valuation Allowance of Deferred Tax Assets
Roll forward of valuation allowance:
BALANCE AT BEGINNING OF THE YEAR	60,003	55,666	$ 61,756
CHARGED (CREDITED) TO EXPENSE	(8,337)	6,211	3,568
OTHER INCREASES/ (DECREASES)	(4,728)	(1,874)	(9,658)
BALANCE AT END OF THE YEAR	$ 46,938	$ 60,003	$ 55,666

Income Taxes - Components Of In

Income Taxes - Components Of Income (Loss) From Continuing Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
United States	$ 276,145	$ 203,225	$ 203,078
Canada	52,332	48,326	53,779
Other Foreign	44,228	76,591	153,454
Income (Loss) from Continuing Operations Before Provision (Benefit) for Income Taxes	$ 372,705	$ 328,142	$ 410,311

Income Taxes - Income Tax Recon

Income Taxes - Income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Provision (benefit) for income taxes:
Federal—current	$ (10,424)	$ 7,262	$ 703
Federal—deferred	8,834	(3,356)	(4,162)
State—current	2,956	3,943	918
State—deferred	(625)	(1,126)	627
Foreign—current	50,063	49,350	45,371
Foreign—deferred	(21,195)	3,858	(704)
Provision (Benefit) for Income Taxes	29,609	59,931	42,753
Changes in income taxes resulting from:
Computed "expected” tax provision	78,268	68,910	86,165
Tax adjustment relating to REIT	(60,378)	(40,577)	(35,165)
State taxes (net of federal tax benefit)	2,258	2,115	1,599
(Decrease) increase in valuation allowance (net operating losses)	(8,337)	6,211	3,568
(Reversal) reserve accrual and audit settlements (net of federal tax benefit)	(7,409)	514	(13,985)
Foreign tax rate differential	9,472	8,562	1,031
Disallowed foreign interest, Subpart F income, and other foreign taxes	20,242	14,241	903
Other, net	(4,507)	(45)	(1,363)
Provision (Benefit) for Income Taxes	$ 29,609	$ 59,931	$ 42,753

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reconciliation of unrecognized tax benefits:
Gross tax contingencies - beginning of the period	$ 35,068	$ 35,320	$ 38,533
Gross additions based on tax positions related to the current year	2,907	2,914	3,147
Gross additions for tax positions of prior years	80	1,271	981
Gross reductions for tax positions of prior years	(5,617)	(299)	(2,865)
Lapses of statutes	(4,480)	(4,034)	(4,462)
Settlements	(1,989)	(104)	(14)
Gross tax contingencies - end of the period	$ 25,969	$ 35,068	$ 35,320

Segment Information - Additiona

Segment Information - Additional Information (Details)	12 Months Ended
	Dec. 31, 2020offeringmarketcountrysegment
Segment information
Number of operating segments | segment	3
Distinct offerings | offering	5
Records management
Segment information
Number of countries | country	56
Consumer Storage
Segment information
Number of markets	31
GLOBAL DATA CENTER BUSINESS | United States
Segment information
Number of markets	9
GLOBAL DATA CENTER BUSINESS | Non-US
Segment information
Number of markets	4

Segment Information - Revenue a

Segment Information - Revenue and Expenditures (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment information
Total Revenues	$ 4,147,270	$ 4,262,584	$ 4,225,761
Storage rental	2,754,091	2,681,087	2,622,455
Service	1,393,179	1,581,497	1,603,306
Depreciation and Amortization	652,069	658,201	639,514
Depreciation	447,562	456,323	452,740
Amortization	204,507	201,878	186,774
Adjusted EBITDA	1,475,721	1,469,009	1,458,924
Total Assets	14,149,267	13,816,816	11,857,218
Expenditures for Segment Assets	631,854	882,867	2,317,306
Capital Expenditures	438,263	692,983	460,062
Cash Paid for Acquisitions, Net of Cash Acquired	118,581	58,237	1,758,557
Acquisitions of Customer Relationships, Customer Inducements and Contract Fulfillment Costs	75,010	131,647	98,687
GLOBAL RIM BUSINESS
Segment information
Total Revenues	3,699,280	3,812,433	3,842,600
Storage rental	2,373,783	2,320,076	2,301,344
Service	1,325,497	1,492,357	1,541,256
Depreciation and Amortization	455,567	454,652	472,155
Depreciation	309,969	330,534	341,384
Amortization	145,598	124,118	130,771
Adjusted EBITDA	1,574,069	1,566,065	1,572,438
Total Assets	10,938,359	10,753,218	9,135,198
Expenditures for Segment Assets	338,006	398,690	443,634
Capital Expenditures	150,175	248,232	254,308
Cash Paid for Acquisitions, Net of Cash Acquired	118,581	54,717	93,217
Acquisitions of Customer Relationships, Customer Inducements and Contract Fulfillment Costs	69,250	95,741	96,109
GLOBAL DATA CENTER BUSINESS
Segment information
Total Revenues	279,312	257,151	228,983
Storage rental	263,695	246,925	218,675
Service	15,617	10,226	10,308
Depreciation and Amortization	134,844	133,927	105,680
Depreciation	83,106	78,939	58,707
Amortization	51,738	54,988	46,973
Adjusted EBITDA	126,576	121,517	99,575
Total Assets	2,727,654	2,535,848	2,217,505
Expenditures for Segment Assets	249,459	427,935	1,794,386
Capital Expenditures	243,699	392,029	152,739
Cash Paid for Acquisitions, Net of Cash Acquired	0	0	1,639,427
Acquisitions of Customer Relationships, Customer Inducements and Contract Fulfillment Costs	5,760	35,906	2,220
CORPORATE  AND OTHER BUSINESS
Segment information
Total Revenues	168,678	193,000	154,178
Storage rental	116,613	114,086	102,436
Service	52,065	78,914	51,742
Depreciation and Amortization	61,658	69,622	61,679
Depreciation	54,487	46,850	52,649
Amortization	7,171	22,772	9,030
Adjusted EBITDA	(224,924)	(218,573)	(213,089)
Total Assets	483,254	527,750	504,515
Expenditures for Segment Assets	44,389	56,242	79,286
Capital Expenditures	44,389	52,722	53,015
Cash Paid for Acquisitions, Net of Cash Acquired	0	3,520	25,913
Acquisitions of Customer Relationships, Customer Inducements and Contract Fulfillment Costs	$ 0	$ 0	$ 358

Segment Information - Reconcili

Segment Information - Reconciliation of Adjusted EBITDA to Income (Loss) from Continuing Operations (Details) - USD ($) $ in Thousands	12 Months Ended			15 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2020
Reconciliation of Adjusted EBITDA to income from continuing operations
Income (Loss) from Continuing Operations	$ 343,096	$ 268,211	$ 367,558
Interest expense, net	418,535	419,298	409,648
Provision (Benefit) for Income Taxes	29,609	59,931	42,753
Depreciation and amortization	652,069	658,201	639,514
Significant Acquisition Costs	0	13,293	50,665
Restructuring charges	194,396	48,597	0	$ 242,993
Intangible impairments	23,000	0	0
(Gain) loss on disposal/write-down of property, plant and equipment, net (including real estate)	(363,537)	(63,824)	(73,622)
Other expense (income), net, excluding our share of losses (gains) from our unconsolidated joint ventures(1)	133,611	25,720	(11,867)
Stock-based compensation expense	34,272	36,194	31,014
COVID-19 Costs	9,285	0	0
Our share of Adjusted EBITDA reconciling items from our unconsolidated joint ventures	1,385	3,388	3,261
Adjusted EBITDA	1,475,721	$ 1,469,009	$ 1,458,924
Cost of Sales
Reconciliation of Adjusted EBITDA to income from continuing operations
COVID-19 Costs	7,600
Selling, general and administrative expenses
Reconciliation of Adjusted EBITDA to income from continuing operations
COVID-19 Costs	$ 1,600

Segment Information - Geographi

Segment Information - Geographical and Long Lived Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Revenues	$ 4,147,270	$ 4,262,584	$ 4,225,761
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Revenues	2,577,084	2,632,586	2,579,847
Long-Lived Assets	7,818,059	7,862,262	6,902,232
United Kingdom
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Revenues	247,667	274,931	280,993
Long-Lived Assets	838,491	755,859	547,768
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Revenues	224,860	243,033	249,505
Long-Lived Assets	556,120	556,591	453,398
Australia
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Revenues	133,815	143,511	155,367
Long-Lived Assets	575,862	530,755	442,755
Remaining Countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Revenues	963,844	968,523	960,049
Long-Lived Assets	$ 3,090,948	$ 2,875,010	$ 2,302,951

Segment Information - Revenues

Segment Information - Revenues by Product and Service Lines by Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment information
Total Revenues	$ 4,147,270	$ 4,262,584	$ 4,225,761
GLOBAL RIM BUSINESS
Segment information
Total Revenues	3,699,280	3,812,433	3,842,600
GLOBAL DATA CENTER BUSINESS
Segment information
Total Revenues	279,312	257,151	228,983
CORPORATE  AND OTHER BUSINESS
Segment information
Total Revenues	168,678	193,000	154,178
Records management
Segment information
Total Revenues	2,954,299	2,995,146	2,967,922
Records management | GLOBAL RIM BUSINESS
Segment information
Total Revenues	2,852,296	2,866,192	2,871,253
Records management | GLOBAL DATA CENTER BUSINESS
Segment information
Total Revenues	0	0	0
Records management | CORPORATE  AND OTHER BUSINESS
Segment information
Total Revenues	102,003	128,954	96,669
Data management
Segment information
Total Revenues	554,873	584,128	596,544
Data management | GLOBAL RIM BUSINESS
Segment information
Total Revenues	488,198	520,082	539,035
Data management | GLOBAL DATA CENTER BUSINESS
Segment information
Total Revenues	0	0	0
Data management | CORPORATE  AND OTHER BUSINESS
Segment information
Total Revenues	66,675	64,046	57,509
Information destruction
Segment information
Total Revenues	358,786	426,159	432,312
Information destruction | GLOBAL RIM BUSINESS
Segment information
Total Revenues	358,786	426,159	432,312
Information destruction | GLOBAL DATA CENTER BUSINESS
Segment information
Total Revenues	0	0	0
Information destruction | CORPORATE  AND OTHER BUSINESS
Segment information
Total Revenues	0	0	0
Data Center
Segment information
Total Revenues	279,312	257,151	228,983
Data Center | GLOBAL RIM BUSINESS
Segment information
Total Revenues	0	0	0
Data Center | GLOBAL DATA CENTER BUSINESS
Segment information
Total Revenues	279,312	257,151	228,983
Data Center | CORPORATE  AND OTHER BUSINESS
Segment information
Total Revenues	$ 0	$ 0	$ 0

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Frankfurt JV
Related Party Transaction [Line Items]
Revenue from related party	$ 400
Makespace
Related Party Transaction [Line Items]
Revenue from related party	$ 33,600	$ 22,500

Project Summit - Additional Inf

Project Summit - Additional Information (Details) $ in Thousands	3 Months Ended	12 Months Ended			15 Months Ended	27 Months Ended
	Dec. 31, 2019USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2021USD ($)employee
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		$ 194,396	$ 48,597	$ 0	$ 242,993
Project Summit Costs
Restructuring Cost and Reserve [Line Items]
Planned workforce reductions		70.00%			70.00%
Restructuring Charges	$ 48,597	$ 194,396
Project Summit Costs | Forecast
Restructuring Cost and Reserve [Line Items]
Percentage of positions eliminated						45.00%
Managerial and administrative workforce | employee						700
Restructuring Charges						$ 450,000

Project Summit - Restructuring

Project Summit - Restructuring Charges (Details) - USD ($) $ in Thousands	12 Months Ended			15 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2020
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 194,396	$ 48,597	$ 0	$ 242,993
Employee severance costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	47,349	20,850		68,199
Professional fees and other costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	147,047	27,747		174,794
GLOBAL RIM BUSINESS
Restructuring Cost and Reserve [Line Items]
Restructuring charges	67,140	21,900		89,040
GLOBAL DATA CENTER BUSINESS
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,632	306		1,938
CORPORATE  AND OTHER BUSINESS
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 125,624	$ 26,391		$ 152,015

Project Summit - Restructurin_2

Project Summit - Restructuring Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended			15 Months Ended
	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2020
Restructuring Cost and Reserve [Line Items]
Amounts accrued		$ 194,396	$ 48,597	$ 0	$ 242,993
Project Summit Costs
Restructuring Cost and Reserve [Line Items]
Beginning balance	$ 0	17,777			0
Amounts accrued	48,597	194,396
Payments	(30,820)	(168,677)
Other, including currency translation adjustments	0	3,443
Ending balance	17,777	40,053	17,777		40,053
Employee severance costs
Restructuring Cost and Reserve [Line Items]
Amounts accrued		47,349	20,850		68,199
Employee severance costs | Project Summit Costs
Restructuring Cost and Reserve [Line Items]
Beginning balance	0	4,823			0
Amounts accrued	20,850	47,349
Payments	(16,027)	(32,455)
Other, including currency translation adjustments	0	3,439
Ending balance	4,823	16,278	4,823		16,278
Professional fees and other costs
Restructuring Cost and Reserve [Line Items]
Amounts accrued		147,047	27,747		174,794
Professional fees and other costs | Project Summit Costs
Restructuring Cost and Reserve [Line Items]
Beginning balance	0	12,954			0
Amounts accrued	27,747	147,047
Payments	(14,793)	(136,222)
Other, including currency translation adjustments	0	4
Ending balance	$ 12,954	$ 23,775	$ 12,954		$ 23,775

SCHEDULE III - SCHEDULE OF RE_2

SCHEDULE III - SCHEDULE OF REAL ESTATE AND ACCUMULATED DEPRECIATION - Gross Real Estate (Details) $ in Thousands	Dec. 31, 2020USD ($)facility	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation Disclosure [Abstract]
Number of facilities leased | facility	1,167
Gross amount carried at close of current period	$ 3,830,489	$ 3,856,515	$ 3,700,307
Add Reconciling Items:
Book value of racking included in leased facilities	1,448,654
Book value of financing leases	410,583
Book value of construction in progress	287,580
Total Reconciling Items	2,146,817
Gross Amount of Real Estate Assets, As Disclosed in Note 2.h.	$ 5,977,306

SCHEDULE III - SCHEDULE OF RE_3

SCHEDULE III - SCHEDULE OF REAL ESTATE AND ACCUMULATED DEPRECIATION - Accumulated Depreciation (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation Disclosure [Abstract]
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,097,616	$ 1,072,013	$ 1,011,050
Add Reconciling Items:
Accumulated Depreciation - non-real estate assets	1,549,986
Accumulated Depreciation - racking in leased facilities	941,028
Accumulated Depreciation - financing leases	155,264
Total Reconciling Items	2,646,278
Accumulated Depreciation, As Reported on Consolidated Balance Sheet	$ 3,743,894

SCHEDULE III - SCHEDULE OF RE_4

SCHEDULE III - SCHEDULE OF REAL ESTATE AND ACCUMULATED DEPRECIATION (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020USD ($)facility	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	281
Encumbrances	$ 805
Initial cost to company	2,362,209
Cost capitalized subsequent to acquisition	1,468,280
Gross amount carried at close of current period	3,830,489	$ 3,856,515	$ 3,700,307
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,097,616	$ 1,072,013	$ 1,011,050
Number of facilities leased | facility	1,167
United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	160
Encumbrances	$ 0
Initial cost to company	1,833,229
Cost capitalized subsequent to acquisition	1,062,809
Gross amount carried at close of current period	2,896,038
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 777,507
Canada
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	16
Encumbrances	$ 0
Initial cost to company	72,200
Cost capitalized subsequent to acquisition	83,526
Gross amount carried at close of current period	155,726
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 71,839
Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	57
Encumbrances	$ 277
Initial cost to company	231,658
Cost capitalized subsequent to acquisition	152,069
Gross amount carried at close of current period	383,727
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 159,249
Latin America RIM
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	39
Encumbrances	$ 528
Initial cost to company	115,967
Cost capitalized subsequent to acquisition	99,311
Gross amount carried at close of current period	215,278
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 68,920
Asia Pacific
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	7
Encumbrances	$ 0
Initial cost to company	107,384
Cost capitalized subsequent to acquisition	67,698
Gross amount carried at close of current period	175,082
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 19,459
Australia
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	2
Encumbrances	$ 0
Initial cost to company	1,771
Cost capitalized subsequent to acquisition	2,867
Gross amount carried at close of current period	4,638
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 642
North America
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	176
Encumbrances	$ 0
Initial cost to company	1,905,429
Cost capitalized subsequent to acquisition	1,146,335
Gross amount carried at close of current period	3,051,764
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 849,346
140 Oxmoor Ct, Birmingham, Alabama | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,322
Cost capitalized subsequent to acquisition	978
Gross amount carried at close of current period	2,300
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,181
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
1420 North Fiesta Blvd, Gilbert, Arizona | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,637
Cost capitalized subsequent to acquisition	2,741
Gross amount carried at close of current period	4,378
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 2,115
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
4802 East Van Buren, Phoenix, Arizona | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	15,599
Cost capitalized subsequent to acquisition	143,887
Gross amount carried at close of current period	159,486
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 3,246
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
615 North 48th Street, Phoenix, Arizona | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	423,107
Cost capitalized subsequent to acquisition	21,338
Gross amount carried at close of current period	444,445
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 43,817
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
2955 S. 18th Place, Phoenix, Arizona | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	12,178
Cost capitalized subsequent to acquisition	14,250
Gross amount carried at close of current period	26,428
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 6,019
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
4449 South 36th St, Phoenix, Arizona | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	7,305
Cost capitalized subsequent to acquisition	1,049
Gross amount carried at close of current period	8,354
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 5,190
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
8521 E. Princess Drive, Scottsdale, Arizona | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	87,865
Cost capitalized subsequent to acquisition	1,879
Gross amount carried at close of current period	89,744
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 12,425
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
600 Burning Tree Rd, Fullerton, California | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	4,762
Cost capitalized subsequent to acquisition	1,899
Gross amount carried at close of current period	6,661
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 3,091
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
21063 Forbes St, Hayward, California | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	13,407
Cost capitalized subsequent to acquisition	365
Gross amount carried at close of current period	13,772
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 2,912
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
1025 North Highland Ave, Los Angeles, California | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	10,168
Cost capitalized subsequent to acquisition	26,791
Gross amount carried at close of current period	36,959
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 15,136
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
1010 - 1006 North Mansfield, Los Angeles, California | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	749
Cost capitalized subsequent to acquisition	0
Gross amount carried at close of current period	749
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 128
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
1350 West Grand Ave, Oakland, California | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	15,172
Cost capitalized subsequent to acquisition	7,251
Gross amount carried at close of current period	22,423
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 15,293
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
1760 North Saint Thomas Circle, Orange, California | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	4,576
Cost capitalized subsequent to acquisition	499
Gross amount carried at close of current period	5,075
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,981
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
1915 South Grand Ave, Santa Ana, California | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	3,420
Cost capitalized subsequent to acquisition	1,272
Gross amount carried at close of current period	4,692
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 2,027
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
2680 Sequoia Dr, South Gate, California | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	6,329
Cost capitalized subsequent to acquisition	2,251
Gross amount carried at close of current period	8,580
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 4,291
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
336 Oyster Point Blvd, South San Francisco, California | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	15,100
Cost capitalized subsequent to acquisition	49
Gross amount carried at close of current period	15,149
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 2,446
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
25250 South Schulte Rd, Tracy, California | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	3,049
Cost capitalized subsequent to acquisition	1,774
Gross amount carried at close of current period	4,823
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 2,232
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
3576 N. Moline, Aurora, Colorado | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,583
Cost capitalized subsequent to acquisition	4,469
Gross amount carried at close of current period	6,052
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 2,025
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
5151 E. 46th Ave, Denver, Colorado | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	6,312
Cost capitalized subsequent to acquisition	709
Gross amount carried at close of current period	7,021
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,752
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
11333 E 53rd Ave, Denver, Colorado | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	7,403
Cost capitalized subsequent to acquisition	10,232
Gross amount carried at close of current period	17,635
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 9,949
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
4300 Brighton Boulevard, Denver, Colorado | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	116,336
Cost capitalized subsequent to acquisition	21,257
Gross amount carried at close of current period	137,593
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 14,131
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
20 Eastern Park Rd, East Hartford, Connecticut | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	7,417
Cost capitalized subsequent to acquisition	1,904
Gross amount carried at close of current period	9,321
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 6,340
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Bennett Rd, Suffield, Connecticut | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	2
Encumbrances	$ 0
Initial cost to company	1,768
Cost capitalized subsequent to acquisition	940
Gross amount carried at close of current period	2,708
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,459
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Kennedy Road, Windsor, Connecticut | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	2
Encumbrances	$ 0
Initial cost to company	10,447
Cost capitalized subsequent to acquisition	31,259
Gross amount carried at close of current period	41,706
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 21,987
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
293 Ella Grasso Rd, Windsor Locks, Connecticut | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	4,021
Cost capitalized subsequent to acquisition	2,072
Gross amount carried at close of current period	6,093
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 3,008
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
150-200 Todds Ln, Wilmington, Delaware | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	7,226
Cost capitalized subsequent to acquisition	1,048
Gross amount carried at close of current period	8,274
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 5,205
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
13280 Vantage Way, Jacksonville, Florida | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,853
Cost capitalized subsequent to acquisition	573
Gross amount carried at close of current period	2,426
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,013
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
12855 Starkey Rd, Largo, Florida | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	3,293
Cost capitalized subsequent to acquisition	3,005
Gross amount carried at close of current period	6,298
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 3,399
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
7801 Riviera Blvd, Miramar, Florida | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	8,250
Cost capitalized subsequent to acquisition	234
Gross amount carried at close of current period	8,484
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,027
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
10002 Satellite Blvd, Orlando, Florida | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,927
Cost capitalized subsequent to acquisition	343
Gross amount carried at close of current period	2,270
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 938
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
3501 Electronics Way, West Palm Beach, Florida | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	4,201
Cost capitalized subsequent to acquisition	13,851
Gross amount carried at close of current period	18,052
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 7,604
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
1890 MacArthur Blvd, Atlanta, Georgia | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,786
Cost capitalized subsequent to acquisition	772
Gross amount carried at close of current period	2,558
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,193
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
3881 Old Gordon Rd, Atlanta, Georgia | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,185
Cost capitalized subsequent to acquisition	790
Gross amount carried at close of current period	1,975
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 898
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
5319 Tulane Drive SW, Atlanta, Georgia | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	2,808
Cost capitalized subsequent to acquisition	3,940
Gross amount carried at close of current period	6,748
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 3,560
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
6111 Live Oak Parkway, Norcross, Georgia | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	3,542
Cost capitalized subsequent to acquisition	2,720
Gross amount carried at close of current period	6,262
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 517
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
3150 Nifda Dr, Smyrna, Georgia | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	463
Cost capitalized subsequent to acquisition	777
Gross amount carried at close of current period	1,240
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 763
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
2425 South Halsted St, Chicago, Illinois | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	7,470
Cost capitalized subsequent to acquisition	1,670
Gross amount carried at close of current period	9,140
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 4,536
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
1301 S. Rockwell St, Chicago, Illinois | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	7,947
Cost capitalized subsequent to acquisition	19,884
Gross amount carried at close of current period	27,831
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 16,600
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
2604 West 13th St, Chicago, Illinois | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	404
Cost capitalized subsequent to acquisition	2,888
Gross amount carried at close of current period	3,292
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 2,874
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
2211 W. Pershing Rd, Chicago, Illinois | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	4,264
Cost capitalized subsequent to acquisition	13,995
Gross amount carried at close of current period	18,259
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 9,024
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
2255 Pratt Blvd, Elk Grove, Illinois | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,989
Cost capitalized subsequent to acquisition	3,893
Gross amount carried at close of current period	5,882
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,681
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
4175 Chandler Dr Opus No. Corp, Hanover Park, Illinois | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	22,048
Cost capitalized subsequent to acquisition	2,801
Gross amount carried at close of current period	24,849
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 10,352
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
2600 Beverly Drive, Lincoln, Illinois | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,378
Cost capitalized subsequent to acquisition	923
Gross amount carried at close of current period	2,301
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 319
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
6090 NE 14th Street, Des Moines, Iowa | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	622
Cost capitalized subsequent to acquisition	511
Gross amount carried at close of current period	1,133
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 443
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
South 7th St, Louisville, Kentucky | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	4
Encumbrances	$ 0
Initial cost to company	709
Cost capitalized subsequent to acquisition	14,547
Gross amount carried at close of current period	15,256
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 5,885
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
26 Parkway Drive (fka 133 Pleasant), Scarborough, Maine | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	8,337
Cost capitalized subsequent to acquisition	389
Gross amount carried at close of current period	8,726
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 3,386
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
8928 McGaw Ct, Columbia, Maryland | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	2,198
Cost capitalized subsequent to acquisition	6,441
Gross amount carried at close of current period	8,639
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 3,905
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
10641 Iron Bridge Rd, Jessup, Maryland | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	3,782
Cost capitalized subsequent to acquisition	1,459
Gross amount carried at close of current period	5,241
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 2,801
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
96 High St, Billerica, Massachusetts | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	3,221
Cost capitalized subsequent to acquisition	3,948
Gross amount carried at close of current period	7,169
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 3,781
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
120 Hampden St, Boston, Massachusetts | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	164
Cost capitalized subsequent to acquisition	939
Gross amount carried at close of current period	1,103
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 576
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
32 George St, Boston, Massachusetts | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,820
Cost capitalized subsequent to acquisition	5,391
Gross amount carried at close of current period	7,211
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 5,630
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
14500 Weston Pkwy, Cary, North Carolina | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,880
Cost capitalized subsequent to acquisition	2,229
Gross amount carried at close of current period	4,109
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 2,071
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
3435 Sharps Lot Rd, Dighton, Massachusetts | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,911
Cost capitalized subsequent to acquisition	797
Gross amount carried at close of current period	2,708
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 2,130
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
77 Constitution Boulevard, Franklin, Massachusetts | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	5,413
Cost capitalized subsequent to acquisition	224
Gross amount carried at close of current period	5,637
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 857
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
216 Canal St, Lawrence, Massachusetts | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,298
Cost capitalized subsequent to acquisition	1,123
Gross amount carried at close of current period	2,421
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,840
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Bearfoot Road, Northboro, Massachusetts | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	2
Encumbrances	$ 0
Initial cost to company	55,923
Cost capitalized subsequent to acquisition	12,745
Gross amount carried at close of current period	68,668
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 42,266
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
38300 Plymouth Road, Livonia, Michigan | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	10,285
Cost capitalized subsequent to acquisition	1,920
Gross amount carried at close of current period	12,205
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 4,310
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
6601 Sterling Dr South, Sterling Heights, Michigan | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,294
Cost capitalized subsequent to acquisition	1,250
Gross amount carried at close of current period	2,544
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,276
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
1985 Bart Ave, Warren, Michigan | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,802
Cost capitalized subsequent to acquisition	530
Gross amount carried at close of current period	2,332
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,187
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Wahl Court, Warren, Michigan | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	2
Encumbrances	$ 0
Initial cost to company	3,426
Cost capitalized subsequent to acquisition	2,684
Gross amount carried at close of current period	6,110
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 3,882
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
31155 Wixom Rd, Wixom, Michigan | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	4,000
Cost capitalized subsequent to acquisition	1,482
Gross amount carried at close of current period	5,482
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 2,872
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
3140 Ryder Trail South, Earth City, Missouri | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	3,072
Cost capitalized subsequent to acquisition	3,398
Gross amount carried at close of current period	6,470
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 2,558
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Missouri Bottom Road, Hazelwood, Missouri | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	4
Encumbrances	$ 0
Initial cost to company	28,282
Cost capitalized subsequent to acquisition	5,073
Gross amount carried at close of current period	33,355
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 8,667
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Leavenworth St/18th St, Omaha, Nebraska | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	3
Encumbrances	$ 0
Initial cost to company	2,924
Cost capitalized subsequent to acquisition	19,855
Gross amount carried at close of current period	22,779
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 8,295
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
4105 North Lamb Blvd, Las Vegas, Nevada | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	3,430
Cost capitalized subsequent to acquisition	8,965
Gross amount carried at close of current period	12,395
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 6,276
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
17 Hydro Plant Rd, Milton, New Hampshire | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	6,179
Cost capitalized subsequent to acquisition	4,445
Gross amount carried at close of current period	10,624
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 6,895
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
3003 Woodbridge Avenue, Edison, New Jersey | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	310,404
Cost capitalized subsequent to acquisition	56,509
Gross amount carried at close of current period	366,913
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 29,990
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
811 Route 33, Freehold, New Jersey | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	3
Encumbrances	$ 0
Initial cost to company	38,697
Cost capitalized subsequent to acquisition	57,207
Gross amount carried at close of current period	95,904
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 56,003
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
51-69 & 77-81 Court St, Newark, New Jersey | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	11,734
Cost capitalized subsequent to acquisition	10,437
Gross amount carried at close of current period	22,171
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 2,179
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
560 Irvine Turner Blvd, Newark, New Jersey | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	9,522
Cost capitalized subsequent to acquisition	1,718
Gross amount carried at close of current period	11,240
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,109
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
231 Johnson Ave, Newark, New Jersey | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	8,945
Cost capitalized subsequent to acquisition	2,399
Gross amount carried at close of current period	11,344
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,173
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
650 Howard Avenue, Somerset, New Jersey | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	3,585
Cost capitalized subsequent to acquisition	11,835
Gross amount carried at close of current period	15,420
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 6,553
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
100 Bailey Ave, Buffalo, New York | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,324
Cost capitalized subsequent to acquisition	11,437
Gross amount carried at close of current period	12,761
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 7,052
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
64 Leone Ln, Chester, New York | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	5,086
Cost capitalized subsequent to acquisition	1,132
Gross amount carried at close of current period	6,218
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 3,606
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
1368 County Rd 8, Farmington, New York | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	2,611
Cost capitalized subsequent to acquisition	4,788
Gross amount carried at close of current period	7,399
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 4,869
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
County Rd 10, Linlithgo, New York | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	2
Encumbrances	$ 0
Initial cost to company	102
Cost capitalized subsequent to acquisition	3,233
Gross amount carried at close of current period	3,335
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,782
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
77 Seaview Blvd, N. Hempstead New York | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	5,719
Cost capitalized subsequent to acquisition	1,442
Gross amount carried at close of current period	7,161
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 2,925
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
37 Hurds Corner Road, Pawling, New York | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	4,323
Cost capitalized subsequent to acquisition	1,285
Gross amount carried at close of current period	5,608
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 2,471
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Ulster Ave/Route 9W, Port Ewen, New York | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	3
Encumbrances	$ 0
Initial cost to company	23,137
Cost capitalized subsequent to acquisition	11,745
Gross amount carried at close of current period	34,882
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 23,388
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Binnewater Rd, Rosendale, New York | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	2
Encumbrances	$ 0
Initial cost to company	5,142
Cost capitalized subsequent to acquisition	11,827
Gross amount carried at close of current period	16,969
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 7,696
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
220 Wavel St, Syracuse, New York | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	2,929
Cost capitalized subsequent to acquisition	2,765
Gross amount carried at close of current period	5,694
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 3,098
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
2235 Cessna Drive, Burlington, North Carolina | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,602
Cost capitalized subsequent to acquisition	328
Gross amount carried at close of current period	1,930
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 277
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
826 Church Street, Morrisville, North Carolina | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	7,087
Cost capitalized subsequent to acquisition	266
Gross amount carried at close of current period	7,353
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,558
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
1275 East 40th, Cleveland, Ohio | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	3,129
Cost capitalized subsequent to acquisition	606
Gross amount carried at close of current period	3,735
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 2,137
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
7208 Euclid Avenue, Cleveland, Ohio | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	3,336
Cost capitalized subsequent to acquisition	4,071
Gross amount carried at close of current period	7,407
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 3,471
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
4260 Tuller Ridge Rd, Dublin, Ohio | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,030
Cost capitalized subsequent to acquisition	1,881
Gross amount carried at close of current period	2,911
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,562
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
3366 South Tech Boulevard, Miamisburg, Ohio | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	29,092
Cost capitalized subsequent to acquisition	674
Gross amount carried at close of current period	29,766
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 3,085
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
302 South Byrne Rd, Toledo, Ohio | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	602
Cost capitalized subsequent to acquisition	1,090
Gross amount carried at close of current period	1,692
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 820
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
7530 N. Leadbetter Road, Portland, Oregon | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	5,187
Cost capitalized subsequent to acquisition	1,874
Gross amount carried at close of current period	7,061
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 4,314
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Branchton Rd, Boyers, Pennsylvania | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	3
Encumbrances	$ 0
Initial cost to company	21,166
Cost capitalized subsequent to acquisition	243,167
Gross amount carried at close of current period	264,333
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 70,834
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
800 Carpenters Crossings, Folcroft, Pennsylvania | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	2,457
Cost capitalized subsequent to acquisition	976
Gross amount carried at close of current period	3,433
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 2,168
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Las Flores Industrial Park, Rio Grande, Puerto Rico | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	4,185
Cost capitalized subsequent to acquisition	3,528
Gross amount carried at close of current period	7,713
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 4,698
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
24 Snake Hill Road, Chepachet, Rhode Island | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	2,659
Cost capitalized subsequent to acquisition	2,243
Gross amount carried at close of current period	4,902
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 3,120
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
1061 Carolina Pines Road, Columbia, South Carolina | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	11,776
Cost capitalized subsequent to acquisition	2,348
Gross amount carried at close of current period	14,124
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 3,706
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
2301 Prosperity Way, Florence, South Carolina | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	2,846
Cost capitalized subsequent to acquisition	1,259
Gross amount carried at close of current period	4,105
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,427
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Mitchell Street, Knoxville, Tennessee | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	2
Encumbrances	$ 0
Initial cost to company	718
Cost capitalized subsequent to acquisition	4,575
Gross amount carried at close of current period	5,293
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 2,229
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
6005 Dana Way, Nashville, Tennessee | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	2
Encumbrances	$ 0
Initial cost to company	1,827
Cost capitalized subsequent to acquisition	3,063
Gross amount carried at close of current period	4,890
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 2,105
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
11406 Metric Blvd, Austin, Texas | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	5,489
Cost capitalized subsequent to acquisition	2,212
Gross amount carried at close of current period	7,701
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 4,274
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
6600 Metropolis Drive, Austin, Texas | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	4,519
Cost capitalized subsequent to acquisition	454
Gross amount carried at close of current period	4,973
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,529
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Capital Parkway, Carrollton, Texas | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	3
Encumbrances	$ 0
Initial cost to company	8,299
Cost capitalized subsequent to acquisition	9,991
Gross amount carried at close of current period	18,290
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 3,182
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
1800 Columbian Club Dr, Carrolton, Texas | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	19,673
Cost capitalized subsequent to acquisition	1,190
Gross amount carried at close of current period	20,863
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 10,111
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
1905 John Connally Dr, Carrolton, Texas | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	2,174
Cost capitalized subsequent to acquisition	848
Gross amount carried at close of current period	3,022
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,481
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
13425 Branchview Ln, Dallas, Texas | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	3,518
Cost capitalized subsequent to acquisition	3,685
Gross amount carried at close of current period	7,203
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 4,335
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Cockrell Ave, Dallas, Texas | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,277
Cost capitalized subsequent to acquisition	1,597
Gross amount carried at close of current period	2,874
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 2,013
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
1819 S. Lamar St, Dallas, Texas | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	3,215
Cost capitalized subsequent to acquisition	1,145
Gross amount carried at close of current period	4,360
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 2,715
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
2000 Robotics Place Suite B, Fort Worth, Texas | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	5,328
Cost capitalized subsequent to acquisition	2,269
Gross amount carried at close of current period	7,597
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 3,173
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
1202 Ave R, Grand Prairie, Texas | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	8,354
Cost capitalized subsequent to acquisition	2,204
Gross amount carried at close of current period	10,558
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 6,283
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
6203 Bingle Rd, Houston, Texas | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	3,188
Cost capitalized subsequent to acquisition	11,495
Gross amount carried at close of current period	14,683
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 9,102
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
3502 Bissonnet St, Houston, Texas | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	7,687
Cost capitalized subsequent to acquisition	722
Gross amount carried at close of current period	8,409
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 6,051
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
2600 Center Street, Houston, Texas | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	2,840
Cost capitalized subsequent to acquisition	2,227
Gross amount carried at close of current period	5,067
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 2,724
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
5707 Chimney Rock, Houston, Texas | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,032
Cost capitalized subsequent to acquisition	1,211
Gross amount carried at close of current period	2,243
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,145
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
5249 Glenmont Ave, Houston, Texas | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	3,467
Cost capitalized subsequent to acquisition	2,406
Gross amount carried at close of current period	5,873
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 2,952
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
15333 Hempstead Hwy, Houston, Texas | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	3
Encumbrances	$ 0
Initial cost to company	6,327
Cost capitalized subsequent to acquisition	37,843
Gross amount carried at close of current period	44,170
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 14,745
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
5757 Royalton Dr, Houston, Texas | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,795
Cost capitalized subsequent to acquisition	1,024
Gross amount carried at close of current period	2,819
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,374
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
9601 West Tidwell, Houston, Texas | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,680
Cost capitalized subsequent to acquisition	2,395
Gross amount carried at close of current period	4,075
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,424
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
7800 Westpark, Houston, Texas | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	6,323
Cost capitalized subsequent to acquisition	1,344
Gross amount carried at close of current period	7,667
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 2,010
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
15300 FM 1825, Pflugerville, Texas | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	2
Encumbrances	$ 0
Initial cost to company	3,811
Cost capitalized subsequent to acquisition	8,015
Gross amount carried at close of current period	11,826
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 5,482
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
930 Avenue B, San Antonio, Texas | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	393
Cost capitalized subsequent to acquisition	245
Gross amount carried at close of current period	638
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 279
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
931 North Broadway, San Antonio, Texas | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	3,526
Cost capitalized subsequent to acquisition	1,161
Gross amount carried at close of current period	4,687
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 2,963
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
1665 S. 5350 West, Salt Lake City, Utah | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	6,239
Cost capitalized subsequent to acquisition	4,273
Gross amount carried at close of current period	10,512
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 5,622
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
11052 Lakeridge Pkwy, Ashland, Virginia | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,709
Cost capitalized subsequent to acquisition	1,927
Gross amount carried at close of current period	3,636
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,974
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
2301 International Parkway, Fredericksburg, Virginia | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	20,980
Cost capitalized subsequent to acquisition	240
Gross amount carried at close of current period	21,220
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 6,397
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
11660 Hayden Road, Manassas, Virginia | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	104,824
Cost capitalized subsequent to acquisition	0
Gross amount carried at close of current period	104,824
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 0
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
4555 Progress Road, Norfolk, Virginia | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	6,527
Cost capitalized subsequent to acquisition	1,125
Gross amount carried at close of current period	7,652
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 3,541
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
3725 Thirlane Rd. N.W., Roanoke, Virginia | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	2,577
Cost capitalized subsequent to acquisition	190
Gross amount carried at close of current period	2,767
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,265
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
7700-7730 Southern Dr, Springfield, Virginia | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	14,167
Cost capitalized subsequent to acquisition	2,776
Gross amount carried at close of current period	16,943
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 9,761
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
22445 Randolph Dr, Sterling, Virginia | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	7,598
Cost capitalized subsequent to acquisition	3,737
Gross amount carried at close of current period	11,335
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 6,328
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
307 South 140th St, Burien, Washington | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	2,078
Cost capitalized subsequent to acquisition	2,367
Gross amount carried at close of current period	4,445
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 2,476
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
8908 W. Hallett Rd, Cheney, Washington | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	510
Cost capitalized subsequent to acquisition	4,266
Gross amount carried at close of current period	4,776
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 2,250
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
6600 Hardeson Rd, Everett, Washington | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	5,399
Cost capitalized subsequent to acquisition	3,435
Gross amount carried at close of current period	8,834
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 3,774
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
1201 N. 96th St, Seattle, Washington | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	4,496
Cost capitalized subsequent to acquisition	2,531
Gross amount carried at close of current period	7,027
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 3,744
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
4330 South Grove Road, Spokane, Washington | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	3,906
Cost capitalized subsequent to acquisition	850
Gross amount carried at close of current period	4,756
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 608
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
12021 West Bluemound Road, Wauwatosa, Wisconsin | United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,307
Cost capitalized subsequent to acquisition	2,134
Gross amount carried at close of current period	3,441
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,542
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
One Command Court, Bedford | Canada
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	3,847
Cost capitalized subsequent to acquisition	4,719
Gross amount carried at close of current period	8,566
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 4,517
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
195 Summerlea Road, Brampton | Canada
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	5,403
Cost capitalized subsequent to acquisition	6,786
Gross amount carried at close of current period	12,189
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 5,982
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
10 Tilbury Court, Brampton | Canada
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	5,007
Cost capitalized subsequent to acquisition	17,897
Gross amount carried at close of current period	22,904
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 8,974
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
8825 Northbrook Court, Burnaby | Canada
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	8,091
Cost capitalized subsequent to acquisition	2,476
Gross amount carried at close of current period	10,567
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 5,097
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
8088 Glenwood Drive, Burnaby | Canada
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	4,326
Cost capitalized subsequent to acquisition	7,414
Gross amount carried at close of current period	11,740
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 5,143
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
5811 26th Street S.E., Calgary | Canada
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	14,658
Cost capitalized subsequent to acquisition	9,497
Gross amount carried at close of current period	24,155
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 12,102
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
3905-101 Street, Edmonton | Canada
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	2,020
Cost capitalized subsequent to acquisition	910
Gross amount carried at close of current period	2,930
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,703
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
68 Grant Timmins Drive, Kingston | Canada
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	3,639
Cost capitalized subsequent to acquisition	753
Gross amount carried at close of current period	4,392
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 458
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
3005 Boul. Jean-Baptiste Deschamps, Lachine | Canada
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	2,751
Cost capitalized subsequent to acquisition	579
Gross amount carried at close of current period	3,330
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,506
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
1655 Fleetwood, Laval | Canada
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	8,196
Cost capitalized subsequent to acquisition	18,761
Gross amount carried at close of current period	26,957
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 14,003
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
4005 Richelieu, Montreal | Canada
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,800
Cost capitalized subsequent to acquisition	2,657
Gross amount carried at close of current period	4,457
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,912
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
1209 Algoma Rd, Ottawa | Canada
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,059
Cost capitalized subsequent to acquisition	7,178
Gross amount carried at close of current period	8,237
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 4,426
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
1650 Comstock Rd, Ottawa | Canada
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	7,478
Cost capitalized subsequent to acquisition	90
Gross amount carried at close of current period	7,568
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 2,884
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
235 Edson Street, Saskatoon | Canada
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	829
Cost capitalized subsequent to acquisition	1,731
Gross amount carried at close of current period	2,560
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 955
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
640 Coronation Drive, Scarborough | Canada
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,853
Cost capitalized subsequent to acquisition	1,345
Gross amount carried at close of current period	3,198
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,399
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
610 Sprucewood Ave, Windsor | Canada
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,243
Cost capitalized subsequent to acquisition	733
Gross amount carried at close of current period	1,976
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 778
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Gewerbeparkstr. 3, Vienna, Austria | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	6,542
Cost capitalized subsequent to acquisition	9,431
Gross amount carried at close of current period	15,973
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 4,510
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Woluwelaan 147, Diegem, Belgium | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	2,541
Cost capitalized subsequent to acquisition	7,137
Gross amount carried at close of current period	9,678
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 4,953
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Stupničke Šipkovine 62, Zagreb, Croatia | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,408
Cost capitalized subsequent to acquisition	829
Gross amount carried at close of current period	2,237
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 151
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Kratitirion 9 Kokkinotrimithia Industrial District, Nicosia, Cyprus | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	3,136
Cost capitalized subsequent to acquisition	4,031
Gross amount carried at close of current period	7,167
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 802
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Karyatidon 1, Agios Sylas Industrial Area (3rd), Limassol, Cyprus | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,935
Cost capitalized subsequent to acquisition	131
Gross amount carried at close of current period	2,066
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 173
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
65 Egerton Road, Birmingham, England | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	6,980
Cost capitalized subsequent to acquisition	1,871
Gross amount carried at close of current period	8,851
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 5,284
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Corby 278, Long Croft Road, Corby, England | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	20,486
Cost capitalized subsequent to acquisition	5,433
Gross amount carried at close of current period	25,919
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,056
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Otterham Quay Lane, Gillingham, England | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	9
Encumbrances	$ 0
Initial cost to company	7,418
Cost capitalized subsequent to acquisition	3,786
Gross amount carried at close of current period	11,204
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 5,731
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Pennine Way, Hemel Hempstead, England | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	10,847
Cost capitalized subsequent to acquisition	6,902
Gross amount carried at close of current period	17,749
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 7,551
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Kemble Industrial Park, Kemble, England | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	2
Encumbrances	$ 0
Initial cost to company	5,277
Cost capitalized subsequent to acquisition	7,422
Gross amount carried at close of current period	12,699
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 9,082
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Gayton Road, Kings Lynn, England | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	3
Encumbrances	$ 0
Initial cost to company	3,119
Cost capitalized subsequent to acquisition	2,060
Gross amount carried at close of current period	5,179
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 3,077
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Cody Road, London, England | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	3
Encumbrances	$ 0
Initial cost to company	20,307
Cost capitalized subsequent to acquisition	9,978
Gross amount carried at close of current period	30,285
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 12,649
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
17 Broadgate, Oldham, England | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	4,039
Cost capitalized subsequent to acquisition	496
Gross amount carried at close of current period	4,535
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 2,538
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Harpway Lane, Sopley, England | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	681
Cost capitalized subsequent to acquisition	1,519
Gross amount carried at close of current period	2,200
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,497
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Unit 1A Broadmoor Road, Swindom, England | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	2,636
Cost capitalized subsequent to acquisition	588
Gross amount carried at close of current period	3,224
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,326
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Jeumont-Schneider, Champagne Sur Seine, France | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	3
Encumbrances	$ 0
Initial cost to company	1,750
Cost capitalized subsequent to acquisition	2,881
Gross amount carried at close of current period	4,631
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 2,590
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Bat I-VII Rue de Osiers, Coignieres, France | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	4
Encumbrances	$ 0
Initial cost to company	21,318
Cost capitalized subsequent to acquisition	1,177
Gross amount carried at close of current period	22,495
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 5,376
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
26 Rue de I Industrie, Fergersheim, France | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,322
Cost capitalized subsequent to acquisition	36
Gross amount carried at close of current period	1,358
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 326
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Bat A, B, C1, C2, C3 Rue Imperiale, Gue de Longroi, France | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	3,390
Cost capitalized subsequent to acquisition	1,087
Gross amount carried at close of current period	4,477
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,177
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Le Petit Courtin Site de Dois, Gueslin, Mingieres, France | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	14,141
Cost capitalized subsequent to acquisition	1,025
Gross amount carried at close of current period	15,166
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 2,558
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
ZI des Sables, Morangis, France | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 277
Initial cost to company	12,407
Cost capitalized subsequent to acquisition	17,744
Gross amount carried at close of current period	30,151
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 21,152
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
45 Rue de Savoie, Manissieux, Saint Priest, France | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	5,546
Cost capitalized subsequent to acquisition	322
Gross amount carried at close of current period	5,868
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,075
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Gutenbergstrabe 55, Hamburg, Germany | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	4,022
Cost capitalized subsequent to acquisition	1,148
Gross amount carried at close of current period	5,170
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,292
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Brommer Weg 1, Wipshausen, Germany | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	3,220
Cost capitalized subsequent to acquisition	2,039
Gross amount carried at close of current period	5,259
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 3,712
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Warehouse and Offices 4 Springhill, Cork, Ireland | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	9,040
Cost capitalized subsequent to acquisition	3,617
Gross amount carried at close of current period	12,657
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 5,520
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
17 Crag Terrace, Dublin, Ireland | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	2,818
Cost capitalized subsequent to acquisition	1,075
Gross amount carried at close of current period	3,893
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,556
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Damastown Industrial Park, Dublin, Ireland | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	16,034
Cost capitalized subsequent to acquisition	9,136
Gross amount carried at close of current period	25,170
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 9,330
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Portsmuiden 46, Amsterdam, The Netherlands | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,852
Cost capitalized subsequent to acquisition	2,175
Gross amount carried at close of current period	4,027
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 2,662
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Schepenbergweg 1, Amsterdam, The Netherlands | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,258
Cost capitalized subsequent to acquisition	(600)
Gross amount carried at close of current period	658
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 353
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Vareseweg 130, Rotterdam, The Netherlands | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,357
Cost capitalized subsequent to acquisition	1,244
Gross amount carried at close of current period	2,601
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,900
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Howemoss Drive, Aberdeen, Scotland | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	2
Encumbrances	$ 0
Initial cost to company	6,970
Cost capitalized subsequent to acquisition	5,997
Gross amount carried at close of current period	12,967
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 5,506
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Traquair Road, Innerleithen, Scotland | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	113
Cost capitalized subsequent to acquisition	2,251
Gross amount carried at close of current period	2,364
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,229
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Nettlehill Road, Houston Industrial Estate, Livingston, Scotland | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	11,517
Cost capitalized subsequent to acquisition	27,529
Gross amount carried at close of current period	39,046
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 19,822
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Av Madrid s/n Poligono Industrial Matillas, Alcala de Henares, Spain | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	186
Cost capitalized subsequent to acquisition	270
Gross amount carried at close of current period	456
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 367
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Calle Bronce, 37, Chiloeches, Spain | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	11,011
Cost capitalized subsequent to acquisition	3,540
Gross amount carried at close of current period	14,551
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 3,734
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Ctra M.118 , Km.3 Parcela 3, Madrid, Spain | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	3,981
Cost capitalized subsequent to acquisition	6,751
Gross amount carried at close of current period	10,732
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 7,128
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Abanto Ciervava, Spain | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	2
Encumbrances	$ 0
Initial cost to company	1,053
Cost capitalized subsequent to acquisition	11
Gross amount carried at close of current period	1,064
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 504
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Amancio Alcorta 2396, Buenos Aires, Argentina | Latin America RIM
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	2
Encumbrances	$ 0
Initial cost to company	655
Cost capitalized subsequent to acquisition	722
Gross amount carried at close of current period	1,377
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 439
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Azara 1245, Buenos Aires, Argentina | Latin America RIM
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	166
Cost capitalized subsequent to acquisition	(164)
Gross amount carried at close of current period	2
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 0
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Spegazzini, Ezeiza Buenos Aires, Argentina | Latin America RIM
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	12,773
Cost capitalized subsequent to acquisition	(10,481)
Gross amount carried at close of current period	2,292
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 520
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Av Ernest de Moraes 815, Bairro Fim do Campo, Jarinu Brazil | Latin America RIM
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	12,562
Cost capitalized subsequent to acquisition	(4,547)
Gross amount carried at close of current period	8,015
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,514
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Rua Peri 80, Jundiai, Brazil | Latin America RIM
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	2
Encumbrances	$ 0
Initial cost to company	8,894
Cost capitalized subsequent to acquisition	(3,358)
Gross amount carried at close of current period	5,536
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,146
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Francisco de Souza e Melo, Rio de Janerio, Brazil | Latin America RIM
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	3
Encumbrances	$ 0
Initial cost to company	1,868
Cost capitalized subsequent to acquisition	7,676
Gross amount carried at close of current period	9,544
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 3,150
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Hortolandia, Sao Paulo, Brazil | Latin America RIM
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	24,078
Cost capitalized subsequent to acquisition	(4,430)
Gross amount carried at close of current period	19,648
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 3,332
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
El Taqueral 99, Santiago, Chile | Latin America RIM
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	5
Encumbrances	$ 0
Initial cost to company	2,629
Cost capitalized subsequent to acquisition	34,428
Gross amount carried at close of current period	37,057
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 12,808
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Panamericana Norte 18900, Santiago, Chile | Latin America RIM
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	5
Encumbrances	$ 0
Initial cost to company	4,001
Cost capitalized subsequent to acquisition	19,606
Gross amount carried at close of current period	23,607
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 8,310
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Avenida Prolongacion del Colli 1104, Guadalajara, Mexico | Latin America RIM
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	374
Cost capitalized subsequent to acquisition	1,338
Gross amount carried at close of current period	1,712
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,068
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Privada Las Flores No. 25 (G3), Guadalajara, Mexico | Latin America RIM
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	905
Cost capitalized subsequent to acquisition	1,188
Gross amount carried at close of current period	2,093
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,016
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Tula KM Parque de Las, Huehuetoca, Mexico | Latin America RIM
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	2
Encumbrances	$ 0
Initial cost to company	19,937
Cost capitalized subsequent to acquisition	(1,421)
Gross amount carried at close of current period	18,516
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 3,672
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Carretera Pesqueria Km2.5(M3), Monterrey, Mexico | Latin America RIM
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	2
Encumbrances	$ 0
Initial cost to company	3,537
Cost capitalized subsequent to acquisition	4,462
Gross amount carried at close of current period	7,999
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 3,749
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Lote 2, Manzana A, (T2& T3), Toluca, Mexico | Latin America RIM
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	2,204
Cost capitalized subsequent to acquisition	4,481
Gross amount carried at close of current period	6,685
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 5,279
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Prolongacion de la Calle 7 (T4), Toluca, Mexico | Latin America RIM
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	7,544
Cost capitalized subsequent to acquisition	14,744
Gross amount carried at close of current period	22,288
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 7,474
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Panamericana Sur, KM 57.5, Lima, Peru | Latin America RIM
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	7
Encumbrances	$ 0
Initial cost to company	1,549
Cost capitalized subsequent to acquisition	692
Gross amount carried at close of current period	2,241
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,222
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Av. Elmer Faucett 3462, Lima, Peru | Latin America RIM
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	2
Encumbrances	$ 528
Initial cost to company	4,112
Cost capitalized subsequent to acquisition	4,882
Gross amount carried at close of current period	8,994
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 4,822
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Calle Los Claveles-Seccion 3, Lima, Peru | Latin America RIM
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	8,179
Cost capitalized subsequent to acquisition	29,493
Gross amount carried at close of current period	37,672
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 9,399
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Warehouse No 4, Shanghai, China | Asia Pacific
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,530
Cost capitalized subsequent to acquisition	818
Gross amount carried at close of current period	2,348
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 478
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
Jalan Karanggan Muda Raya No 59, Bogor Indonesia | Asia Pacific
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	7,897
Cost capitalized subsequent to acquisition	4,902
Gross amount carried at close of current period	12,799
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 2,714
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
1 Serangoon North Avenue 6, Singapore | Asia Pacific
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	58,637
Cost capitalized subsequent to acquisition	54,113
Gross amount carried at close of current period	112,750
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 7,309
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
2 Yung Ho Road, Singapore | Asia Pacific
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	10,395
Cost capitalized subsequent to acquisition	1,968
Gross amount carried at close of current period	12,363
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 1,977
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
26 Chin Bee Drive, Singapore | Asia Pacific
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	15,699
Cost capitalized subsequent to acquisition	3,009
Gross amount carried at close of current period	18,708
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 2,986
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
IC1 69 Moo 2, Soi Wat Namdaeng, Bangkok, Thailand | Asia Pacific
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	2
Encumbrances	$ 0
Initial cost to company	13,226
Cost capitalized subsequent to acquisition	2,888
Gross amount carried at close of current period	16,114
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 3,995
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
8 Whitestone Drive, Austins Ferry, Australia | Australia
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	681
Cost capitalized subsequent to acquisition	2,850
Gross amount carried at close of current period	3,531
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 519
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years
6 Norwich Street, South Launceston, Australia | Australia
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 0
Initial cost to company	1,090
Cost capitalized subsequent to acquisition	17
Gross amount carried at close of current period	1,107
Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III	$ 123
LIFE ON WHICH DEPRECIATION IN LATEST INCOME STATEMENT IS COMPUTED	40 years

SCHEDULE III - SCHEDULE OF RE_5

SCHEDULE III - SCHEDULE OF REAL ESTATE AND ACCUMULATED DEPRECIATION - Rollforward Gross Real Estate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Activity in Real Estate
Gross amount at beginning of period	$ 3,856,515	$ 3,700,307
Additions during period:
Discretionary capital projects	157,239	278,508
Other adjustments	66,978	25,077
Foreign currency translation fluctuations	10,198	5,978
Total additions	234,415	309,563
Deductions during period:
Cost of real estate sold, disposed or written-down	(178,869)	(153,355)
Other adjustments	(81,572)	0
Total additions	(260,441)	(153,355)
Gross amount at end of period	$ 3,830,489	$ 3,856,515

SCHEDULE III - SCHEDULE OF RE_6

SCHEDULE III - SCHEDULE OF REAL ESTATE AND ACCUMULATED DEPRECIATION - Rollforward Depreciation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Change in accumulated depreciation
Gross amount of accumulation depreciation at beginning of year:	$ 1,072,013	$ 1,011,050
Additions during period:
Depreciation	123,447	122,366
Other adjustments	0	1,314
Foreign currency translation fluctuations	8,590	3,514
Total additions	132,037	127,194
Deductions during period
Amount of accumulated depreciation for real estate assets sold, disposed or written-down	(54,978)	(66,231)
Other adjustments	(51,456)	0
Accumulated depreciation, gross	(106,434)	(66,231)
Gross amount of end of period	1,097,616	$ 1,072,013
Aggregate Cost of Real Estate Assets	$ 3,769,000