Iron Mountain (IRM) 10-K 14 Feb 19 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2018	Feb. 08, 2019	Jun. 30, 2018
Document and Entity Information
Entity Registrant Name	IRON MOUNTAIN INC
Entity Central Index Key	1,020,569
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false
Document Type	10-K
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding		286,365,695
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 9.9

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current Assets:
Cash and cash equivalents	$ 165,485	$ 925,699
Accounts receivable (less allowances of $46,648 and $43,584 as of December 31, 2017 and 2018, respectively)	846,889	835,742
Prepaid expenses and other	195,740	188,874
Total Current Assets	1,208,114	1,950,315
Property, Plant and Equipment:
Property, plant and equipment	7,600,949	6,251,100
Less—Accumulated depreciation	(3,111,392)	(2,833,421)
Property, Plant and Equipment, net	4,489,557	3,417,679
Other Assets, net:
Goodwill	4,441,030	4,070,267
Customer relationships, customer inducements and data center lease-based intangibles	1,506,522	1,400,547
Other	207,024	133,594
Total Other Assets, net	6,154,576	5,604,408
Total Assets	11,852,247	10,972,402
Current Liabilities:
Current portion of long-term debt	126,406	146,300
Accounts payable	318,765	289,137
Accrued expenses	752,684	653,146
Deferred revenue	264,823	241,590
Total Current Liabilities	1,462,678	1,330,173
Long-term Debt, net of current portion	8,016,417	6,896,971
Other Long-term Liabilities	111,331	73,039
Deferred Rent	121,864	126,231
Deferred Income Taxes	183,836	155,728
Commitments and Contingencies (see Note 10)
Redeemable Noncontrolling Interests (see Note 2.v.)	70,532	91,418
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 283,110,183 shares and 286,321,009 shares as of December 31, 2017 and 2018, respectively)	2,863	2,831
Additional paid-in capital	4,263,348	4,164,562
(Distributions in excess of earnings) Earnings in excess of distributions	(2,116,367)	(1,765,966)
Accumulated other comprehensive items, net	(265,664)	(103,989)
Total Iron Mountain Incorporated Stockholders' Equity	1,884,180	2,297,438
Noncontrolling Interests	1,409	1,404
Total Equity	1,885,589	2,298,842
Total Liabilities and Equity	$ 11,852,247	$ 10,972,402

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Accounts receivable, allowances	$ 43,854	$ 46,648
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, authorized shares	10,000,000	10,000,000
Preferred stock, issued shares	0	0
Preferred stock, outstanding shares	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized shares	400,000,000	400,000,000
Common stock, issued shares	286,321,009	283,110,183
Common stock, outstanding shares	286,321,009	283,110,183

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)	Oct. 25, 2018	Oct. 01, 2018	Jul. 24, 2018	May 24, 2018	Feb. 14, 2018	Oct. 24, 2017	Jul. 27, 2017	May 24, 2017	Feb. 15, 2017	Oct. 31, 2016	Oct. 01, 2016	Jul. 27, 2016	May 25, 2016	Feb. 17, 2016	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues:
Revenues															$ 1,061,489,000	$ 1,060,991,000	$ 1,060,823,000	$ 1,042,458,000	$ 991,235,000	$ 965,661,000	$ 949,806,000	$ 938,876,000	$ 4,225,761,000	$ 3,845,578,000	$ 3,511,453,000
Operating Expenses:
Cost of sales (excluding depreciation and amortization)																							1,801,582,000	1,685,318,000	1,567,777,000
Selling, general and administrative																							1,038,975,000	984,965,000	988,332,000
Depreciation and amortization																							639,514,000	522,376,000	452,326,000
Intangible impairments		$ 0									$ 0								3,011,000				0	3,011,000	0
Loss (Gain) on disposal/write-down of property, plant and equipment (excluding real estate), net																							(9,818,000)	799,000	1,412,000
Total Operating Expenses																							3,470,253,000	3,196,469,000	3,009,847,000
Operating (Loss) Income															191,844,000	195,746,000	203,359,000	164,559,000	154,405,000	176,756,000	170,194,000	147,755,000	755,508,000	649,109,000	501,606,000
Interest Expense, Net (includes Interest Income of $7,558, $7,659 and $6,553 in 2016, 2017 and 2018, respectively)																							409,289,000	353,575,000	310,662,000
Other Expense (Income), Net																							(11,692,000)	79,429,000	44,300,000
Income (Loss) from Continuing Operations Before Provision (Benefit) for Income Taxes and Gain on Sale of Real Estate																							357,911,000	216,105,000	146,644,000
Provision (Benefit) for Income Taxes																							36,263,000	25,947,000	44,944,000
Gain on Sale of Real Estate, Net of Tax																							(55,328,000)	(1,565,000)	(2,180,000)
Income (Loss) from Continuing Operations															158,831,000	78,628,000	93,903,000	45,614,000	24,349,000	25,382,000	83,148,000	58,844,000	376,976,000	191,723,000	103,880,000
Income (Loss) from Discontinued Operations, Net of Tax															0	(11,605,000)	(360,000)	(462,000)	(2,870,000)	(1,058,000)	(2,026,000)	(337,000)	(12,427,000)	(6,291,000)	3,353,000
Net Income (Loss)															158,831,000	67,023,000	93,543,000	45,152,000	21,479,000	24,324,000	81,122,000	58,507,000	364,549,000	185,432,000	107,233,000
Less: Net Income (Loss) Attributable to Noncontrolling Interests																							1,198,000	1,611,000	2,409,000
Net Income (Loss) Attributable to Iron Mountain Incorporated															$ 158,118,000	$ 67,148,000	$ 93,401,000	$ 44,684,000	$ 22,721,000	$ 24,345,000	$ 78,630,000	$ 58,125,000	$ 363,351,000	$ 183,821,000	$ 104,824,000
Earnings (Losses) per Share—Basic:
Income (Loss) from Continuing Operations (in dollars per share)															$ 0.55	$ 0.28	$ 0.33	$ 0.16	$ 0.09	$ 0.10	$ 0.31	$ 0.22	$ 1.31	$ 0.71	$ 0.41
Total Income (Loss) from Discontinued Operations, Net of Tax (in dollars per share)															0	(0.04)	0	0	(0.01)	0	(0.01)	0	(0.04)	(0.02)	0.01
Net Income (Loss) Attributable to Iron Mountain Incorporated (in dollars per share)															0.55	0.23	0.33	0.16	0.08	0.09	0.30	0.22	1.27	0.69	0.43
Earnings (Losses) per Share—Diluted:
Income (Loss) from Continuing Operations (in dollars per share)															0.55	0.27	0.33	0.16	0.09	0.10	0.30	0.22	1.31	0.71	0.41
Total Income (Loss) from Discontinued Operations, Net of Tax (in dollars per share)															0	(0.04)	0	0	(0.01)	0	(0.01)	0	(0.04)	(0.02)	0.01
Net Income (Loss) Attributable to Iron Mountain Incorporated (in dollars per share)															$ 0.55	$ 0.23	$ 0.33	$ 0.16	$ 0.08	$ 0.09	$ 0.30	$ 0.22	$ 1.27	$ 0.69	$ 0.42
Weighted Average Common Shares Outstanding-Basic (in shares)																							285,913,000	265,898,000	246,178,000
Weighted Average Common Shares Outstanding-Diluted (in shares)																							286,652,588	266,844,584	247,266,998
Dividends Declared per Common Share (in dollars per share)	$ 0.6110		$ 0.5875	$ 0.5875	$ 0.5875	$ 0.5875	$ 0.55	$ 0.55	$ 0.55	$ 0.55		$ 0.485	$ 0.485	$ 0.485									$ 2.3753	$ 2.2706	$ 2.0427
Storage rental
Revenues:
Revenues																							$ 2,622,455,000	$ 2,377,557,000	$ 2,142,905,000
Service
Revenues:
Revenues																							$ 1,603,306,000	$ 1,468,021,000	$ 1,368,548,000

CONSOLIDATED STATEMENTS OF OP_2

CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement [Abstract]
Interest Income	$ 6,553	$ 7,659	$ 7,558

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 158,831	$ 67,023	$ 93,543	$ 45,152	$ 21,479	$ 24,324	$ 81,122	$ 58,507	$ 364,549	$ 185,432	$ 107,233
Other Comprehensive (Loss) Income:
Foreign Currency Translation Adjustment									(164,107)	108,564	(35,641)
Market Value Adjustments for Securities									0	0	(734)
Change in Fair Value of Interest Rate Swap Agreements									(973)	0	0
Total Other Comprehensive (Loss) Income									(165,080)	108,564	(36,375)
Comprehensive Income (Loss)									199,469	293,996	70,858
Comprehensive Income (Loss) Attributable to Noncontrolling Interests									(2,207)	1,591	3,690
Comprehensive Income (Loss) Attributable to Iron Mountain Incorporated									$ 201,676	$ 292,405	$ 67,168

CONSOLIDATED STATEMENTS OF EQUI

CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Earnings in Excess of Distributions (Distributions in Excess of Earnings)	Accumulated Other Comprehensive Items, Net	Noncontrolling Interests	Redeemable Noncontrolling Interests	Recall Holdings Limited	Recall Holdings LimitedCommon Stock	Recall Holdings LimitedAdditional Paid-in Capital	FORTRUST	FORTRUSTCommon Stock	FORTRUSTAdditional Paid-in Capital	Common StockRecall Holdings Limited	Common StockFORTRUST	Equity Offering	Equity OfferingCommon Stock	Equity OfferingAdditional Paid-in Capital	Equity OfferingCommon Stock	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
Balance at Dec. 31, 2015	$ 528,607	$ 2,113	$ 1,623,863	$ (942,218)	$ (174,917)	$ 19,766
Balance (in shares) at Dec. 31, 2015		211,340,296
Increase (Decrease) in Stockholders' Equity
Reclassification to redeemable noncontrolling interests	(25,437)					(25,437)	$ 25,437
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation, including tax benefit (deficiency)	60,260	$ 21	60,239
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation, including tax benefit (deficiency) (in shares)		2,108,962
Issuance of shares in connection with the acquisition								$ 1,835,026	$ 502	$ 1,834,524
Changes in equity related redeemable noncontrolling interests	(28,831)		(28,831)				28,831
Issuance of common stock (in shares)														50,233,412
Parent cash dividends declared	(505,917)			(505,917)
Foreign currency translation adjustment	(36,056)				(36,922)	866
Market value adjustments for securities	(734)				(734)
Change in fair value of interest rate swap agreements	0
Net income (loss)	106,646			104,824		1,822
Noncontrolling interests equity contributions	1,299					1,299
Noncontrolling interests dividends	(1,698)					(1,698)	(573)
Purchase of noncontrolling interests	3,506		0			3,506
Balance at Dec. 31, 2016	1,936,671	$ 2,636	3,489,795	(1,343,311)	(212,573)	124
Balance (in shares) at Dec. 31, 2016		263,682,670
Balance at Dec. 31, 2015							0
Increase (Decrease) in Temporary Equity [Roll Forward]
Foreign currency translation adjustment							415
Net income (loss)							587
Balance at Dec. 31, 2016							54,697
Increase (Decrease) in Stockholders' Equity
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation, including tax benefit (deficiency)	43,110	$ 13	43,097
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation, including tax benefit (deficiency) (in shares)		1,252,823
Issuance of shares in connection with the acquisition											$ 83,014	$ 22	$ 82,992
Changes in equity related redeemable noncontrolling interests	(25,680)		(25,680)				25,680
Stock issued, value																$ 515,952	$ 145	$ 515,807					$ 58,566	$ 15	$ 58,551
Stock issued, shares (in shares)																			14,500,000					1,481,053
Issuance of common stock (in shares)															2,193,637
Parent cash dividends declared	(606,476)			(606,476)
Foreign currency translation adjustment	108,481				108,584	(103)
Market value adjustments for securities	0
Change in fair value of interest rate swap agreements	0
Net income (loss)	185,653			183,821		1,832
Noncontrolling interests equity contributions	0					0	13,230
Noncontrolling interests dividends	(1,956)					(1,956)	(2,051)
Purchase of noncontrolling interests	1,507		0			1,507
Balance at Dec. 31, 2017	$ 2,298,842	$ 2,831	4,164,562	(1,765,966)	(103,989)	1,404
Balance (in shares) at Dec. 31, 2017	283,110,183	283,110,183
Increase (Decrease) in Temporary Equity [Roll Forward]
Foreign currency translation adjustment							83
Net income (loss)							(221)
Balance at Dec. 31, 2017	$ 91,418						91,418
Increase (Decrease) in Stockholders' Equity
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation, including tax benefit (deficiency)	30,020	$ 8	30,012
Issuance of shares under employee stock purchase plan and option plans and stock-based compensation, including tax benefit (deficiency) (in shares)		762,340
Changes in equity related redeemable noncontrolling interests	(16,110)		(16,110)				(16,151)
Stock issued, value																				$ 76,192	$ 22	$ 76,170	$ 8,716	$ 2	$ 8,714
Stock issued, shares (in shares)																					2,175,000			273,486
Parent cash dividends declared	(683,519)			(683,519)
Foreign currency translation adjustment	(160,548)				(160,702)	154
Market value adjustments for securities	0
Change in fair value of interest rate swap agreements	(973)				(973)
Net income (loss)	363,202			363,351		(149)
Noncontrolling interests dividends							(2,523)
Balance at Dec. 31, 2018	$ 1,885,589	$ 2,863	$ 4,263,348	$ (2,116,367)	$ (265,664)	$ 1,409
Balance (in shares) at Dec. 31, 2018	286,321,009	286,321,009
Increase (Decrease) in Temporary Equity [Roll Forward]
Foreign currency translation adjustment							(3,559)
Net income (loss)							1,347
Balance at Dec. 31, 2018	$ 70,532						$ 70,532

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash Flows from Operating Activities:
Net Income (Loss)	$ 364,549,000	$ 185,432,000	$ 107,233,000
(Income) loss from discontinued operations	12,427,000	6,291,000	(3,353,000)
Adjustments to reconcile net income (loss) to cash flows from operating activities:
Depreciation	452,740,000	406,283,000	365,526,000
Amortization (includes amortization of deferred financing costs and discounts of $13,151, $14,962 and $15,675 in 2016, 2017 and 2018, respectively)	202,449,000	131,055,000	99,951,000
Intangible impairments	0	3,011,000	0
Revenue reduction associated with amortization of permanent withdrawal fees and above- and below-market leases (see Note 2.i.)	16,281,000	11,253,000	12,217,000
Stock-based compensation expense	31,167,000	30,019,000	28,976,000
(Benefit) provision for deferred income taxes	(10,729,000)	(36,370,000)	(50,368,000)
Loss on early extinguishment of debt	0	78,368,000	9,283,000
(Gain) loss on disposal/write-down of property, plant and equipment, net (including real estate)	(65,658,000)	(766,000)	(898,000)
Loss on disposal of Iron Mountain Divestments (see Note 13)	0	0	16,838,000
Gain on Russia and Ukraine Divestment (see Note 13)	0	(38,869,000)	0
Foreign currency transactions and other, net	(16,395,000)	50,503,000	16,624,000
(Increase) decrease in assets	(36,054,000)	(93,805,000)	(67,395,000)
Increase (decrease) in liabilities	(14,233,000)	(8,146,000)	6,582,000
Cash Flows from Operating Activities-Continuing Operations	936,544,000	724,259,000	541,216,000
Cash Flows from Operating Activities-Discontinued Operations	(995,000)	(3,291,000)	2,679,000
Cash Flows from Operating Activities	935,549,000	720,968,000	543,895,000
Cash Flows from Investing Activities:
Capital expenditures (see Liquidity and Capital Resources section of Management's Discussion and Analysis of Financial Condition and Results of Operations)	(460,062,000)	(343,131,000)	(328,603,000)
Cash paid for acquisitions, net of cash acquired (see Note 6)	(1,758,557,000)	(219,705,000)	(291,965,000)
Acquisition of customer relationships	(63,577,000)	(55,126,000)	(31,561,000)
Customer inducements (see Note 2.i.)	(8,902,000)	(20,059,000)	(19,205,000)
Customer fulfillment costs (see Note 2.l.)	(26,208,000)	0	0
Net proceeds from divestments (see Note 13)	1,019,000	29,236,000	30,654,000
Proceeds from sales of property and equipment and other, net (including real estate) and proceeds from involuntary conversion of property and equipment	86,159,000	9,337,000	7,977,000
Cash Flows from Investing Activities-Continuing Operations	(2,230,128,000)	(599,448,000)	(632,703,000)
Cash Flows from Investing Activities-Discontinued Operations	8,250,000	0	96,712,000
Cash Flows from Investing Activities	(2,221,878,000)	(599,448,000)	(535,991,000)
Cash Flows from Financing Activities:
Repayment of revolving credit and term loan facilities, bridge facilities and other debt	(14,192,139,000)	(14,429,695,000)	(14,851,440,000)
Proceeds from revolving credit and term loan facilities, bridge facilities and other debt	15,351,614,000	13,917,055,000	14,544,388,000
Early retirement of senior subordinated and senior notes	0	(1,746,856,000)	0
Net proceeds from sales of senior notes	0	2,656,948,000	925,443,000
Debt financing and equity contribution from noncontrolling interests	0	13,230,000	1,299,000
Debt repayment and equity distribution to noncontrolling interests	(2,523,000)	(4,151,000)	(1,765,000)
Parent cash dividends	(673,635,000)	(439,999,000)	(505,871,000)
Net proceeds associated with the Equity Offering, including Over-Allotment Option	76,192,000	516,462,000	0
Excess tax benefit from employee stock-based awards	8,716,000	59,129,000	0
Net proceeds (payments) associated with employee stock-based awards	(1,142,000)	13,095,000	31,922,000
Payment of debt financing and stock issuance costs	(16,405,000)	(14,793,000)	(18,603,000)
Cash Flows from Financing Activities-Continuing Operations	550,678,000	540,425,000	125,373,000
Cash Flows from Financing Activities-Discontinued Operations	0	0	0
Cash Flows from Financing Activities	550,678,000	540,425,000	125,373,000
Effect of Exchange Rates on Cash and Cash Equivalents	(24,563,000)	27,270,000	(25,174,000)
Increase (Decrease) in cash and cash equivalents	(760,214,000)	689,215,000	108,103,000
Cash and cash equivalents, including Restricted Cash, beginning of year	925,699,000	236,484,000	128,381,000
Cash and cash equivalents, including Restricted Cash, end of year	165,485,000	925,699,000	236,484,000
Supplemental Information:
Cash Paid for Interest	388,440,000	368,468,000	297,122,000
Cash Paid for Income Taxes, Net	64,493,000	104,498,000	69,866,000
Non-Cash Investing and Financing Activities:
Capital Leases	83,948,000	166,843,000	74,881,000
Accrued Capital Expenditures	84,143,000	71,098,000	62,691,000
Accrued Purchase Price and Other Holdbacks (see Note 6)	35,218,000	20,093,000	0
Dividends Payable	181,986,000	172,102,000	5,625,000
Fair Value of Initial OSG Investment (see Note 13)	0	18,000,000	0
Recall Holdings Limited
Non-Cash Investing and Financing Activities:
Accrued Purchase Price and Other Holdbacks (see Note 6)			0
Fair Value of Stock Issued for Transaction	0	0	1,835,026,000
FORTRUST
Non-Cash Investing and Financing Activities:
Fair Value of Stock Issued for Transaction	$ 0	$ 83,014,000	$ 0

CONSOLIDATED STATEMENTS OF CA_2

CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Cash Flows [Abstract]
Deferred financing costs and discount included in Amortization	$ 15,675	$ 14,962	$ 13,151

Nature of Business

Nature of Business	12 Months Ended
	Dec. 31, 2018
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 provide storage of physical records and data backup media, information management solutions and enterprise-class colocation and wholesale data center space that help organizations in various locations throughout North America, Europe, Latin America, Asia and Africa. 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 flexible deployment options, including both colocation and wholesale space. 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. On May 2, 2016, we completed the acquisition of Recall Holdings Limited ("Recall") pursuant to the Scheme Implementation Deed, as amended, with Recall (the "Recall Transaction"). See Note 6. On January 1, 2018, we adopted Accounting Standards Update ("ASU") No. 2014-09, Revenue from Contracts with Customers (Topic 606) ("ASU 2014-09"). See Note 2.l. On January 10, 2018, we completed the acquisition of IO Data Centers, LLC ("IODC"). See Note 6.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies a. Principles 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. b. 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. c. 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. At December 31, 2017 and 2018, we had approximately $22,167 and $15,141 , respectively, of restricted cash held by certain financial institutions related to bank guarantees. d. 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. Resulting translation adjustments are reflected in the accumulated other comprehensive, net component of Iron Mountain Incorporated Stockholders' Equity. See Note 2.u. e. Derivative 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 target approximately 75% of our debt portfolio to be fixed with respect to interest rates. Occasionally, we may use interest rate swaps as a tool to maintain our targeted level of fixed rate debt. In addition, we may 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. Sometimes we enter into currency swaps to temporarily hedge an overseas investment, such as a major acquisition, while we arrange permanent financing or to hedge our exposure due to foreign currency exchange movements related to our intercompany accounts with and between our foreign subsidiaries. As of December 31, 2017 and 2018, none of our derivative instruments contained credit-risk related contingent features. See Note 3. f. 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): 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 capital leases in the respective category), at cost, consist of the following: December 31, 2017 2018 Land $ 314,897 $ 400,980 Buildings and building improvements 2,039,902 2,991,307 Leasehold improvements 592,700 770,666 Racking 1,996,594 2,001,831 Warehouse equipment/vehicles 467,345 481,515 Furniture and fixtures 55,245 56,207 Computer hardware and software 627,571 680,283 Construction in progress 156,846 218,160 $ 6,251,100 $ 7,600,949 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. 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 year ended December 31, 2018, we capitalized interest of $3,732 . The amount of capitalized interest during the years ended December 31, 2016 and 2017 was insignificant. 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. 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. During the years ended December 31, 2016 , 2017 and 2018 , we capitalized $16,438 , $25,166 and $29,407 of costs, respectively, associated with the development of internal use computer software projects. 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. We did not record any material write-offs of deferred software costs during the years ended December 31, 2016, 2017 and 2018. 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. When the liability is initially recorded, the entity capitalizes the cost by increasing the carrying amount of the related long-lived asset, which is then depreciated over the useful life of the related asset. The liability is increased over time through accretion expense (included in depreciation expense) such that the liability will equate to the future cost to retire the long-lived asset at the expected retirement date. Upon settlement of the liability, an entity either settles the obligation for its recorded amount or realizes a gain or loss upon settlement. 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 obligation 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, 2017 and 2018 were $27,757 and $28,256 , respectively. g. 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. Consolidated loss (gain) on disposal/write-down of property, plant and equipment (excluding real estate), net was (i) $1,412 for the year ended December 31, 2016 and consisted primarily of losses associated with the write-off of certain software assets associated with our North American Records and Information Management Business segment; (ii) $799 for the year ended December 31, 2017 and consisted primarily of losses associated with the write-off of certain property in our Other International Business segment, partially offset by gains on the retirement of leased vehicles accounted for as capital lease assets primarily associated with our North American Records and Information Management Business segment; and (iii) $(9,818) for the year ended December 31, 2018 and consisted primarily of gains associated with the involuntary conversion of assets included in a facility that we own in Argentina which was partially destroyed in a fire in 2014, for which we received insurance proceeds in excess of the carrying amount of such assets during the fourth quarter of 2018. See Note 10.e. Gain on sale of real estate for the year ended December 31, 2016 was $2,180 , net of tax of $130 , and consisted primarily of the sale of land and buildings in the United States and Canada. Gain on sale of real estate for the year ended December 31, 2017 was $1,565 and consisted primarily of the sale of land and building in the United States for net proceeds of approximately $12,700 . Gain on sale of real estate for the year ended December 31, 2018 was $55,328 , net of tax of $8,476 , and consisted primarily of the sale of land and buildings in the United Kingdom. h. 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, 2016, 2017 and 2018. We concluded that as of October 1, 2016 and October 1, 2018, goodwill was not impaired. As of October 1, 2017, we determined that the fair value of the Consumer Storage reporting unit was less than its carrying value and, therefore, we recorded a $3,011 impairment charge on the goodwill associated with this reporting unit during the fourth quarter of 2017, which represents a full write-off of all goodwill associated with this reporting unit. We concluded that the goodwill associated with each of our other reporting units was not impaired as of October 1, 2017. The following is a discussion regarding (i) the reporting units at which level we tested goodwill for impairment as of October 1, 2017, (ii) our reporting units as of December 31, 2017 (including the amount of goodwill associated with each reporting unit), (iii) changes to the composition of our reporting units between December 31, 2017 and October 1, 2018, (iv) the reporting units at which level we tested goodwill for impairment as of October 1, 2018, and (v) our reporting units as of December 31, 2018 (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 - 2017 a. Reporting Units as of October 1, 2017 Our reporting units at which level we performed our goodwill impairment analysis as of October 1, 2017 were as follows: (1) North American Records and Information Management; (2) North American Data Management; (3) Global Data Center (which had no goodwill at October 1, 2017); (4) Consumer Storage; (5) Fine Arts; (6) Western Europe; (7) Northern/Eastern Europe and Middle East, Africa and India ("NEE and MEAI"); (8) Latin America; (9) Australia and New Zealand; and (10) Asia. b. Changes to Composition of Reporting Units between October 1, 2017 and December 31, 2017 During the fourth quarter of 2017, as a result of changes in the management of our entertainment storage and related services businesses, we reassessed the composition of our reportable operating segments (see Note 9 for a description of our reportable operating segments) as well as our reporting units. As a result of this reassessment, we determined that our entertainment storage and related services businesses in the United States and Canada, which were previously included within our North American Data Management reporting unit, were being managed in conjunction with our entertainment storage and services businesses in China - Hong Kong S.A.R., France, the Netherlands and the United Kingdom (the majority of which were acquired in the third quarter of 2017 as part of the Bonded Transaction (as defined and more fully disclosed in Note 6)). This newly formed reporting unit is referred to as the Entertainment Services reporting unit. We have reassigned the related goodwill associated to the reporting units impacted by this change on a relative fair value basis. Goodwill by Reporting Unit as of December 31, 2017 The carrying value of goodwill, net for each of our reporting units described above as of December 31, 2017 is as follows: Carrying Value North American Records and Information Management(1) $ 2,269,446 North American Data Management(2) 497,851 Consumer Storage(3) — Fine Arts(3) 25,298 Entertainment Services(3) 34,750 Western Europe(4) 396,489 NEE and MEAI(5) 188,265 Latin America(5) 155,115 Australia and New Zealand(5) 316,883 Asia(5) 186,170 Global Data Center(6) — Total $ 4,070,267 _______________________________________________________________________________ (1) This reporting unit is included in the North American Records and Information Management Business segment. (2) This reporting unit is included in the North American Data Management Business segment. (3) This reporting unit is included in the Corporate and Other Business segment. (4) This reporting unit is included in the Western European Business segment. (5) This reporting unit is included in the Other International Business segment. (6) This reporting unit is included in the Global Data Center Business segment. Goodwill Impairment Analysis - 2018 a. Changes to Composition of Reporting Units between December 31, 2017 and October 1, 2018 During the second quarter of 2018, as a result of changes in the management of our businesses included in our Other International Business segment, we reassessed the composition of our reporting units. As a result of this reassessment, we determined that our business in South Africa, which was previously included within our NEE and MEAI reporting unit, was now being managed in conjunction with our businesses included in our Australia and New Zealand reporting unit. This newly formed reporting unit, which consists of our businesses in Australia, New Zealand and South Africa is referred to as the Australia, New Zealand and South Africa reporting unit, or the ANZ SA reporting unit. Our former NEE and MEAI reporting unit, which no longer includes our business in South Africa, is referred to as the Northern/Eastern Europe and Middle East and India reporting unit, or the NEE and MEI reporting unit. b. Reporting Units as of October 1, 2018 As a result of the changes described above, our reporting units at which level we performed our goodwill impairment analysis as of October 1, 2018 were as follows: (1) North American Records and Information Management; (2) North American Data Management; (3) Global Data Center; (4) Consumer Storage; (5) Fine Arts; (6) Entertainment Services; (7) Western Europe; (8) NEE and MEI; (9) Latin America; (10) ANZ SA; and (11) Asia. We concluded that the goodwill associated with each of our reporting units was not impaired as of such date. c. Changes to Composition of Reporting Units between October 1, 2018 and December 31, 2018 During the fourth quarter of 2018, as a result of changes in the management of our Information Governance and Digital Solutions business in Sweden, we reassessed the composition of our reporting units as well as our reportable operating segments (see Note 9 for a description of our reportable operating segments). As part of this reassessment, we determined that our Information Governance and Digital Solutions business in Sweden (which was previously managed along with our other businesses within the Western Europe reporting unit) is now being managed in conjunction with our businesses included in our NEE and MEI reporting unit, which already included the remainder of our business in Sweden. We concluded that the goodwill associated with our Western Europe and NEE and MEI reporting units was not impaired following this change in reporting units. See Note 9 for disclosure regarding the impact of this change in management of our business in Sweden on our reportable operating segments. Goodwill by Reporting Unit as of December 31, 2018 The carrying value of goodwill, net for each of our reporting units described above as of December 31, 2018 is as follows: Carrying Value North American Records and Information Management(1) $ 2,251,795 North American Data Management(2) 493,491 Consumer Storage(3) — Fine Arts(3) 35,526 Entertainment Services(3) 34,233 Western Europe(4) 381,806 NEE and MEI(5) 169,780 Latin America(5) 136,099 ANZ SA(5) 300,204 Asia(5) 212,140 Global Data Center(6) 425,956 Total $ 4,441,030 _______________________________________________________________________________ (1) This reporting unit is included in the North American Records and Information Management Business segment. (2) This reporting unit is included in the North American Data Management Business segment. (3) This reporting unit is included in the Corporate and Other Business segment. (4) This reporting unit is included in the Western European Business segment. (5) This reporting unit is included in the Other International Business segment. (6) This reporting unit is included in the Global Data Center Business segment. Reporting unit valuations have generally been determined using a combined approach based on the present value of future cash flows and market multiples. The income approach incorporates many assumptions including future growth rates and operating margins, discount rate factors, expected capital expenditures and income tax cash flows. Changes in economic and operating conditions impacting these assumptions 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, 2017 and 2018 is as follows: North American North American Western European Business Other International Business Global Data Center Business Corporate and Other Business Total Goodwill balance, net of accumulated amortization, as of December 31, 2016 $ 2,280,911 $ 493,966 $ 349,421 $ 743,077 $ — $ 37,646 $ 3,905,021 Deductible goodwill acquired during the year 894 — — 9,274 — 717 10,885 Non-deductible goodwill acquired during the year — — — 24,970 — 24,533 49,503 Goodwill impairment — — — — — (3,011 ) (3,011 ) Goodwill allocated to Russia and Ukraine Divestment (see Note 13) — — — (3,515 ) — — (3,515 ) Fair value and other adjustments(1) (25,195 ) 208 10,536 21,079 — — 6,628 Currency effects 12,836 3,677 36,532 51,548 — 163 104,756 Goodwill balance, net of accumulated amortization, as of December 31, 2017 2,269,446 497,851 396,489 846,433 — 60,048 4,070,267 Deductible goodwill acquired during the year — — — 3,251 — 6,644 9,895 Non-deductible goodwill acquired during the year — — 5,231 28,999 429,853 3,620 467,703 Goodwill allocated to IMFS Divestment (see Note 13) (1,202 ) — — — — — (1,202 ) Fair value and other adjustments(2) (423 ) — — 4,283 — 609 4,469 Currency effects (16,026 ) (4,360 ) (19,914 ) (64,743 ) (3,897 ) (1,162 ) (110,102 ) Goodwill balance, net of accumulated amortization, as of December 31, 2018 $ 2,251,795 $ 493,491 $ 381,806 $ 818,223 $ 425,956 $ 69,759 $ 4,441,030 Accumulated Goodwill Impairment Balance as of December 31, 2017 $ 85,909 $ — $ 46,500 $ — $ — $ 3,011 $ 135,420 Accumulated Goodwill Impairment Balance as of December 31, 2018 $ 85,909 $ — $ 46,500 $ — $ — $ 3,011 $ 135,420 ___________________________________________________________________ (1) Total fair value and other adjustments primarily include net adjustments of $6,628 primarily related to property, plant and equipment, and customer relationship intangible assets. (2) Total fair value and other adjustments primarily include net adjustments of $(2,717) primarily related to property, plant and equipment, customer relationship intangible assets and deferred income taxes and other liabilities and $7,186 of cash paid related to certain acquisitions completed in 2017. i. 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 ten to 30 years (weighted average of 18 years at December 31, 2018 ) and are included in depreciation and amortization in the accompanying Consolidated Statements of Operations. The value of customer relationship intangible assets is calculated based upon estimates of their fair value. ii. Customer Inducements Prior to the adoption of ASU 2014-09, free intake costs to transport boxes to one of our facilities, which include labor and transportation costs ("Free Move Costs"), were capitalized and amortized over periods ranging from ten to 30 years. The amortization of Free Move Costs is included in depreciation and amortization in the accompanying Consolidated Statements of Operations for the years ended December 31, 2016 and 2017. Subsequent to the adoption of ASU 2014-09, Free Move Costs are considered a Contract Fulfillment Cost (as defined in Note 2.l.) and, therefore, are now deferred and amortized and included in amortization expense over three years, consistent with the transfer of the performance obligation to the customer to which the asset relates. See Note 2.l. for information regarding the accounting for Free Move Costs, which are now a component of Intake Costs (as defined in Note 2.l.), following the adoption of ASU 2014-09. Payments that are made to a customer's current records management vendor in order to terminate the customer's existing contract with that vendor, or direct payments to a customer ("Permanent Withdrawal Fees"), are amortized over periods ranging from five to 15 years (weighted average of seven years as of December 31, 2018) and are included in storage and service revenue in the accompanying Consolidated Statements of Operations. Our accounting for Permanent Withdrawal Fees did not change as a result of the adoption of ASU 2014-09. Free Move Costs (prior to the adoption of ASU 2014-09) and Permanent Withdrawal Fees are collectively referred to as "Customer Inducements". If the customer terminates its relationship with us, the unamortized carrying value of the Customer Inducement intangible asset is charged to expense or revenue. However, in the event of such termination, we generally collect, and record as income, permanent removal fees that generally equal or exceed the amount of the unamortized Customer Inducement intangible asset. iii. Data Center Intangible Assets and Liabilities Finite-lived intangible assets associated with our 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") are acquired through either business combinations or asset acquisitions in our data center business. These intangible assets 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 (weighted average of six years as of December 31, 2018) and are included in depreciation and amortization in the accompanying Consolidated Statements of Operations. 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 (weighted average of nine years as of December 31, 2018) and are included in depreciation and amortization in the accompanying Consolidated Statements of Operations. Data Center In-Place Leases and Data Center Tenant Relationships are included in Customer relationships, customer inducements and data center lease-based intangibles in the accompanying Consolidated Balance Sheets. Data Center Above-Market and Below-Market In-Place Lease Intangible Assets 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”) are acquired through either business combinations or asset acquisitions in our data center business. We record Data Center Above-Market Leases and 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 (weighted average of four years as of December 31, 2018) and Data Center Below-Market Leases (weighted average of nine years as of December 31, 2018) are amortized over the remaining non-cancellable term of the acquired in-place lease to storage revenue in the accompanying Consolidated Statements of Operations. Data Center Above-Market Leases are included in Customer relationships, customer inducements and data center lease-based intangibles in the accompanying Consolidated Balance Sheets. Data Center Below-Market Leases are included in Other long-term liabilities in the accompanying Consolidated Balance Sheets. The gross carrying amount and accumulated amortization of our finite-lived intangible assets as of December 31, 2017 and 2018, respectively, are as follows: December 31, 2017 December 31, 2018 Gross Carrying Accumulated Net Carrying Gross Carrying Accumulated Net Carrying Assets: Customer relationship intangible assets $ 1,704,105 $ (395,278 ) $ 1,308,827 $ 1,718,919 $ (455,705 ) $ 1,263,214 Customer inducements(1) 140,030 (66,981 ) 73,049 56,478 (34,181 ) 22,297 Data center lease-based intangible assets(2) 19,314 (643 ) 18,671 271,818 (50,807 ) 221,011 Third-party commissions asset(3) — — — 30,071 (1,089 ) 28,982 $ 1,863,449 $ (462,902 ) $ 1,400,547 $ 2,077,286 $ (541,782 ) $ 1,535,504 Liabilities: Data center below-market leases $ — $ — $ — $ 12,318 $ (1,642 ) $ 10,676 _______________________________________________________________________________ (1) The gross carrying amount, accumulated amortization and net carrying amount of customer inducements as of December 31, 2017 includes Free Move Costs, which were capitalized as Customer Inducements prior to the adoption of ASU 2014-09. Subsequent to the adoption of ASU 2014-09, Free Move Costs are considered Contract Fulfillment Costs and Customer Inducements consist exclusively of Permanent Withdrawal Fees. Contract Fulfillment Costs are included in Other, a component of Other assets, net, in the accompanying Consolidated Balance Sheet as of December 31, 2018. See Note 2.l. for information regarding Contract Fulfillment Costs included in our Consolidated Balance Sheet as of December 31, 2018. (2) Includes Data Center In-Place Leases, Data Center Tenant Relationships and Data Center Above-Market Leases. (3) Third-party commissions asset is included in Other, a component of Other assets, net in the accompanying Consolidated Balance Sheet as of December 31, 2018. See Note 6 for additional information on the third-party commissions asset. Other finite-lived intangible assets, including trade names, noncompetition agreements and trademarks, are capitalized and amortized over a weighted average of four years as of December 31, 2018 , and are included in depreciation and amortization in the accompanying Consolidated Statements of Operations. December 31, 2017 December 31, 2018 Gross Carrying Accumulated Net Carrying Gross Carrying Accumulated Net Carrying Other finite-lived intangible assets (included in other assets, net) $ 20,929 $ (10,728 ) $ 10,201 $ 20,310 $ (14,798 ) $ 5,512 Amortization expense associated with finite-lived intangible assets, revenue reduction associated with the amortization of Permanent Withdrawal Fees 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, 2016 , 2017 and 2018 are as follows: Year Ended December 31, 2016 2017 2018 Amortization expense included in depreciation and amortization associated with: Customer relationship and customer inducement intangible assets $ 84,349 $ 109,563 $ 113,782 Data center in-place leases and tenant relationships — — 43,061 Other finite-lived intangible assets 2,451 6,530 4,624 Third-party commissions asset — — 1,089 Revenue reduction associated with amortization of: Permanent withdrawal fees $ 12,217 $ 11,253 $ 11,408 Data center above-market leases and data center below-market leases — — 4,873 Estimated amortization expense for existing finite-lived intangible assets (excluding deferred financing costs, as disclosed in Note 2.j. and Contract Fulfillment Costs, as defined and disclosed in Note 2.l.) is as follows: Estimated Amortization Included in Depreciation Revenue Reduction Associated with the Amortization of Permanent Withdrawal Fees Revenue Reduction (Increase) Associated with Amortization of Data Center Above-market leases and Below-market leases 2019 $ 160,048 $ 7,386 $ 4,332 2020 155,324 5,705 1,260 2021 151,546 3,792 676 2022 121,459 1,667 157 2023 118,586 1,192 (523 ) Thereafter 800,248 1,387 (3,902 ) j. 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

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	12 Months Ended
	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities	Derivative Instruments and Hedging Activities Historically, we have entered into forward contracts to hedge our exposures associated with certain foreign currencies. At the maturity of the forward contracts, we may enter into new forward contracts to hedge movements in the underlying currencies. At the time of settlement, we either pay or receive the net settlement amount from the forward contract and recognize this amount in Other expense (income), net in our Consolidated Statements of Operations as a realized foreign exchange gain or loss. At the end of each month, we mark the outstanding forward contracts to market and record an unrealized foreign exchange gain or loss for the mark-to-market valuation. We have not designated any of the forward contracts we have entered into as hedges. Our policy is to record the fair value of each derivative instrument on a gross basis. As of December 31, 2017, we had outstanding forward contracts to (i) purchase $138,823 United States dollars and sell 176,000 Canadian dollars, (ii) purchase 135,000 Euros and sell $160,757 United States dollars and (iii) purchase $114,390 United States dollars and sell 96,150 Euros to hedge our foreign exchange exposures. As of December 31, 2018, we had outstanding forward contracts to purchase 29,000 Euros and sell $33,374 United States dollars. The following table provides the fair value of our derivative instruments not designated as hedging instruments as of December 31, 2017 and 2018: Derivatives Not Designated as Hedging Instruments Balance Sheet Location December 31, 2017 December 31, 2018 Derivative assets Prepaid expenses and other $ 1,579 $ 93 Derivative liabilities Accrued expenses 2,329 — Net cash (receipts) payments included in cash from operating activities related to settlements associated with foreign currency forward contracts for the years ended December 31, 2016 , 2017 and 2018 , are as follows: Year Ended December 31, 2016 2017 2018 Net (receipts) payments $ — $ (9,073 ) $ 5,797 (Gains) losses for our derivative instruments for the years ended December 31, 2016, 2017 and 2018 are as follows: Amount of (Gain) Loss Recognized in Income on Derivatives December 31, Derivatives Not Designated as Hedging Instruments Location of Loss (Gain) Recognized in Income on Derivative 2016 2017 2018 Foreign exchange contracts Other expense (income), net $ — $ (8,292 ) $ 4,954 We have designated a portion of (i) our Euro denominated borrowings by IMI under our Former Revolving Credit Facility and (ii) our Euro Notes as a hedge of net investment of certain of our Euro denominated subsidiaries. For the years ended December 31, 2016 , 2017 and 2018 , we designated on average 29,649 , 103,682 and 224,424 Euros, respectively, of our Euro denominated borrowings by IMI under our Former Revolving Credit Facility and Euro Notes as a hedge of net investment of certain of our Euro denominated subsidiaries. As a result, we recorded the following foreign exchange gains (losses) related to the change in fair value of such debt due to the currency translation adjustments, which is a component of accumulated other comprehensive items, net: Year Ended December 31, 2016 2017 2018 Foreign exchange gains (losses) $ 1,107 $ (15,015 ) $ 11,070 As of December 31, 2018 , cumulative net gains of $14,258 , net of tax, are recorded in accumulated other comprehensive items, net associated with this net investment hedge. 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, 2018 , we have $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 rate payments (at the fixed rate interest specified in the interest rate swap agreements). We have designated these interest rate swaps as cash flow hedges. Unrealized gains are recognized as assets while unrealized losses are recognized as liabilities. The fair value of the interest rate swaps are estimated using industry standard valuation models using market-based observable inputs, including interest rate curves (Level 2, as described in Note 2.s.). At December 31, 2018 , we had a derivative liability of $973 , which was recorded as a component of Other Long-term Liabilities in our Consolidated Balance Sheet, which represents the fair value of our interest rate swap agreements. We have recorded the change in fair value of the interest rate swap agreements to accumulated other comprehensive income. We have recorded unrealized losses of $973 for the year ended December 31, 2018 associated with our interest rate swap agreements. At December 31, 2018, we have recorded cumulative unrealized losses of $973 within accumulated other comprehensive items, net associated with these agreements.

Debt

Debt	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Debt	Long-term debt is as follows: December 31, 2017 December 31, 2018 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) 466,593 (14,407 ) 452,186 466,593 793,832 (14,117 ) 779,715 793,832 Term Loan A(1) 243,750 — 243,750 243,750 240,625 — 240,625 240,625 Term Loan B(1)(2) — — — — 693,169 (8,742 ) 684,427 660,013 Australian Dollar Term Loan (the "AUD Term Loan")(3)(4) 187,504 (3,382 ) 184,122 189,049 233,955 (3,084 ) 230,871 235,645 UK Bilateral Revolving Credit Facility ("UK Bilateral Facility")(4) — — — — 178,299 (2,357 ) 175,942 178,299 4 3 / 8 % Senior Notes due 2021 (the "4 3 / 8 % Notes")(5)(6)(7) 500,000 (5,874 ) 494,126 507,500 500,000 (4,155 ) 495,845 488,750 6% Senior Notes due 2023 (the "6% Notes due 2023")(5)(6) 600,000 (6,224 ) 593,776 625,500 600,000 (5,126 ) 594,874 606,000 5 3 / 8 % CAD Senior Notes due 2023 (the "CAD Notes due 2023")(5)(7)(8) 199,171 (3,295 ) 195,876 208,631 183,403 (2,506 ) 180,897 186,154 5 3 / 4 % Senior Subordinated Notes due 2024 (the "5 3 / 4 % Notes")(5)(6) 1,000,000 (9,156 ) 990,844 1,012,500 1,000,000 (7,782 ) 992,218 940,000 3% Euro Senior Notes due 2025 (the "Euro Notes")(5)(6)(7) 359,386 (4,691 ) 354,695 364,776 343,347 (4,098 ) 339,249 321,029 3 7 / 8 % GBP Senior Notes due 2025 (the "GBP Notes due 2025")(5)(7)(9) 539,702 (7,718 ) 531,984 527,559 509,425 (6,573 ) 502,852 453,811 5 3 / 8 % Senior Notes due 2026 (the "5 3 / 8 % Notes")(5)(7)(10) 250,000 (3,615 ) 246,385 256,875 250,000 (3,185 ) 246,815 224,375 4 7 / 8 % Senior Notes due 2027 (the "4 7 / 8 % Notes")(5)(6)(7) 1,000,000 (13,866 ) 986,134 1,000,000 1,000,000 (12,442 ) 987,558 855,000 5 1 / 4 % Senior Notes due 2028 (the "5 1 / 4 % Notes")(5)(6)(7) 825,000 (11,817 ) 813,183 826,031 825,000 (10,923 ) 814,077 713,625 Real Estate Mortgages, Capital Leases and Other(11) 649,432 (566 ) 648,866 649,432 606,702 (171 ) 606,531 606,702 Accounts Receivable Securitization Program(12) 258,973 (356 ) 258,617 258,973 221,673 (218 ) 221,455 221,673 Mortgage Securitization Program(13) 50,000 (1,273 ) 48,727 50,000 50,000 (1,128 ) 48,872 50,000 Total Long-term Debt 7,129,511 (86,240 ) 7,043,271 8,229,430 (86,607 ) 8,142,823 Less Current Portion (146,300 ) — (146,300 ) (126,406 ) — (126,406 ) Long-term Debt, Net of Current Portion $ 6,983,211 $ (86,240 ) $ 6,896,971 $ 8,103,024 $ (86,607 ) $ 8,016,417 ______________________________________________________________ (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.s.) 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, 2017 and 2018, respectively. (2) The amount of debt for the Term Loan B (as defined below) reflects an unamortized original issue discount of $1,581 as of December 31, 2018. (3) The amount of debt for the AUD Term Loan reflects an unamortized original issue discount of $ 1,545 and $1,690 as of December 31, 2017 and 2018, respectively. (4) The fair value (Level 3 of fair value hierarchy described at Note 2.s.) 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.s.) of these debt instruments are based on quoted market prices for these notes on December 31, 2017 and 2018 , respectively. (6) Collectively, the "Parent Notes". IMI is the direct obligor on the Parent Notes, which are fully and unconditionally guaranteed, on a senior or senior subordinated basis, as the case may be, 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. See Note 5. (7) The 4 3 / 8 % Notes, the CAD Notes due 2023, the Euro Notes, the GBP Notes due 2025, the 5 3 / 8 % Notes, the 4 7 / 8 % Notes and the 5 1 / 4 % Notes (collectively, 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 is the direct obligor on the CAD Notes due 2023, 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. See Note 5. (9) Iron Mountain (UK) PLC ("IM UK") is the direct obligor on the GBP Notes due 2025, 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. See Note 5. (10) Iron Mountain US Holdings, Inc. ("IM US Holdings"), one of the Guarantors, is the direct obligor on the 5 3 / 8 % Notes, which are fully and unconditionally guaranteed, on a senior basis, by IMI and the other Guarantors. These guarantees are joint and several obligations of IMI and such Guarantors. See Note 5. (11) Includes (i) real estate mortgages of $20,183 and $18,576 as of December 31, 2017 and 2018 , respectively, which bear interest at approximately 4.3% as of December 31, 2017 and 4.1% as of December 31, 2018 and are payable in various installments through 2021, (ii) capital lease obligations of $436,285 and $447,173 as of December 31, 2017 and 2018 , respectively, which bear a weighted average interest rate of 4.9% at December 31, 2017 and 5.7% at December 31, 2018 , and (iii) other notes and other obligations, which were assumed by us as a result of certain acquisitions, of $192,964 and $140,953 as of December 31, 2017 and 2018 , respectively, and bear a weighted average interest rate of 11.2% at December 31, 2017 and 11.1% at December 31, 2018 , respectively. We believe the fair value (Level 3 of fair value hierarchy described at Note 2.s.) of this debt approximates its carrying value. (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.s.) of this debt approximates its carrying value. (13) The Mortgage Securitization Special Purpose Subsidiary is the obligor under this program. We believe the fair value (Level 3 of fair value hierarchy described at Note 2.s.) of this debt approximates its carrying value. a. Credit Agreement On August 21, 2017, we entered into a new credit agreement (the "Credit Agreement") which amended and restated our then existing credit agreement which consisted of a revolving credit facility (the "Former Revolving Credit Facility") and a term loan and was scheduled to terminate on July 6, 2019. The Credit Agreement consists of a revolving credit facility (the "Revolving Credit Facility") and a term loan (the "Term Loan A"). The maximum amount permitted to be borrowed under the Revolving Credit Facility is $1,750,000 . The original amount of the Term Loan A was $250,000 . Under the Revolving Credit Facility, we had the option to request additional commitments of up to $500,000 , 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 was originally scheduled to mature on August 21, 2022, at which point all obligations were to become due. On March 22, 2018, we entered into an amendment (the “2018 First Amendment”) to the Credit Agreement which provided us with the option to request additional commitments of up to approximately $1,260,000 under the Credit Agreement in the form of term loans or through increased commitments under the Revolving Credit Facility, subject to the conditions specified in the Credit Agreement. On June 4, 2018, we entered into another amendment (the "2018 Second Amendment") to the Credit Agreement which (i) reduced interest rate margins applicable to existing and future borrowings under the Revolving Credit Facility and Term Loan A by 0.25% and (ii) extended the maturity date of the Credit Agreement to June 4, 2023. 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 . The Term Loan A 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. 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, 2018, we had $793,832 and $240,625 of outstanding borrowings under the Revolving Credit Facility and the Term Loan A, respectively. Of the $793,832 of outstanding borrowings under the Revolving Credit Facility, $619,800 was denominated in United States dollars, 93,700 was denominated in Canadian dollars and 92,000 was denominated in Euros. In addition, we also had various outstanding letters of credit totaling $43,297 under the Revolving Credit Facility. The remaining amount available for borrowing under the Revolving Credit Facility as of December 31, 2018, 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 $912,871 (which amount represents the maximum availability as of such date). The average interest rate in effect under the Credit Agreement was 3.9% as of December 31, 2018. The average interest rate in effect under the Revolving Credit Facility was 3.9% as of December 31, 2018 and the interest rate in effect under the Term Loan A as of December 31, 2018 was 4.2% . In connection with the 2018 First Amendment, Iron Mountain Information Management, LLC ("IMIM") entered into an incremental term loan activation notice, or the Activation Notice, with certain lenders pursuant to which the lenders party to the Activation Notice agreed to provide commitments to fund an incremental term loan B in the amount of $700,000 (the “Term Loan B”). On March 26, 2018, IMIM borrowed the full amount of the Term Loan B, which matures on January 2, 2026. The Term Loan B was issued at 99.75% of par. The aggregate net proceeds of approximately $689,850 , after paying commissions to the joint lead arrangers and net of the original discount, were used to repay outstanding borrowings under the Revolving Credit Facility. 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% . The interest rate in effect under Term Loan B as of December 31, 2018 was 4.3% . b. Notes Issued under Indentures As of December 31, 2018 , we had nine series of senior subordinated or senior notes issued under various indentures, six of which are direct obligations of the parent company, IMI; one of which (the 53/8% Notes) is a direct obligation of IM US Holdings; one of which (the CAD Notes due 2023) is a direct obligation of Canada Company; and one of which (the GBP Notes due 2025) is a direct obligation of IM UK. 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, except the 5 3 / 4 % Notes which are subordinated in right of payment to the Credit Agreement, the senior notes shown below and other "Senior Debt" as defined in, and to the extent set forth in, our indenture for the 5 3 / 4 % Notes, and (iii) is structurally subordinated to all liabilities of our subsidiaries that do not guarantee such series of notes: • 4 3 / 8 % Notes: $500,000 principal amount of senior notes maturing on June 1, 2021 and bearing interest at a rate of 4 3 / 8 % per annum, payable semi-annually in arrears on December 1 and June 1; • 6% Notes due 2023: $600,000 principal amount of senior notes maturing on August 15, 2023 and bearing interest at a rate of 6% per annum, payable semi-annually in arrears on February 15 and August 15; • CAD Notes due 2023: 250,000 CAD principal amount of senior notes maturing on September 15, 2023 and bearing interest at a rate of 5 3 / 8 % per annum, payable semi-annually in arrears on March 15 and September 15; • 5 3 / 4 % Notes: $1,000,000 principal amount of senior subordinated notes maturing on August 15, 2024 and bearing interest at a rate of 5 3 / 4 % per annum, payable semi-annually in arrears on February 15 and August 15; • Euro Notes: 300,000 Euro principal amount of senior notes maturing on January 15, 2025 and bearing interest at a rate of 3% per annum, payable semi-annually in arrears on January 15 and July 15; • GBP Notes due 2025: 400,000 British pounds sterling principal amount of senior notes maturing on November 15, 2025 and bearing interest at a rate of 3 7 / 8 % per annum, payable semi-annually in arrears on May 15 and November 15; • 5 3 / 8 % Notes: $250,000 principal amount of senior notes maturing on June 1, 2026 and bearing interest at a rate of 5 3 / 8 % per annum, payable semi-annually in arrears on December 1 and June 1; • 4 7 / 8 % Notes: $1,000,000 principal amount of senior notes maturing on September 15, 2027 and bearing interest at a rate of 4 7 / 8 % per annum, payable semi-annually in arrears on March 15 and September 15; and • 5 1 / 4 % Notes: $825,000 principal amount of senior notes maturing on March 15, 2028 and bearing interest at a rate of 5 1 / 4 % per annum, payable semi-annually in arrears on March 15 and September 15. In May 2016, IMI completed a private offering of $500,000 in aggregate principal amount of the 4 3 / 8 % Notes and IM US Holdings completed a private offering of $250,000 in aggregate principal amount of the 5 3 / 8 % Notes. The 4 3 / 8 % Notes and 5 3 / 8 % Notes were issued at par. The aggregate net proceeds of $738,750 from the 4 3 / 8 % Notes and 5 3 / 8 % Notes, after paying the initial purchasers' commissions, were used, together with cash on hand and borrowings under the Former Revolving Credit Facility, for the repayment of all outstanding borrowings under a bridge credit agreement which provided a portion of the financing necessary to close the Recall Transaction. In September 2016, Canada Company completed a private offering of 250,000 Canadian dollars in aggregate principal amount of the CAD Notes due 2023. The CAD Notes due 2023 were issued at par. The aggregate net proceeds from the CAD Notes due 2023 of 246,250 Canadian dollars (or $186,693 , based upon the exchange rate between the Canadian dollar and the United States dollar on September 15, 2016 (the settlement date for the CAD Notes due 2023)), after paying the initial purchasers’ commissions, were used to repay outstanding borrowings under the Former Revolving Credit Facility. In May 2017, IMI completed a private offering of 300,000 Euros in aggregate principal amount of the Euro Notes, which were issued at par. The net proceeds to IMI from the Euro Notes of 296,250 Euros (or $332,683 , based upon the exchange rate between the Euro and the United States dollar on May 23, 2017 (the settlement date for the Euro Notes)), after paying the initial purchasers' commissions, were used to repay outstanding borrowings under the Former Revolving Credit Facility. In August 2017, we redeemed all of the 200,000 Canadian dollars in aggregate principal outstanding of the 6 1 / 8 % CAD Senior Notes due 2021 (the "CAD Notes due 2021") (approximately $157,458 , based upon the exchange rate between the Canadian dollar and the United States dollar on August 15, 2017 (the redemption date for the CAD Notes due 2021)) at 103.063% of par, plus accrued and unpaid interest to, but excluding the redemption date, utilizing borrowings under the Former Revolving Credit Facility. We recorded a charge of $6,354 to Other expense (income), net in the third quarter of 2017 related to the early extinguishment of this debt, representing the call premium associated with the early redemption, as well as a write-off of unamortized deferred financing costs. In September 2017, IMI completed a private offering of $1,000,000 in aggregate principal amount of the 4 7 / 8 % Notes, which were issued at par. The net proceeds of approximately $987,500 from the 4 7 / 8 % Notes after deducting discounts to the initial purchasers, together with borrowings under the Revolving Credit Facility, were used to fund the redemption of all of the 6% Notes due 2020. In September 2017, we redeemed all of the $1,000,000 in aggregate principal outstanding of the 6% Notes due 2020 at 103.155% of par, plus accrued and unpaid interest to, but excluding, the redemption date. We recorded a charge of $41,738 to Other expense (income), net in the third quarter of 2017 related to the early extinguishment of this debt, representing the call premium associated with the early redemption, as well as a write-off of unamortized deferred financing costs. In November 2017, IM UK completed a private offering of 400,000 British pounds sterling in aggregate principal amount of the GBP Notes due 2025, which were issued at 100% of par. The net proceeds to IM UK of 395,000 British pounds sterling (or $522,077 , based upon the exchange rate between the British pounds sterling and the United States dollar on November 13, 2017 (the settlement date for the GBP Notes due 2025)), after deducting discounts to the initial purchasers, were used, together with borrowings under the Revolving Credit Facility, to fund the redemption of all the GBP Notes due 2022. In November 2017, we redeemed all of the GBP Notes due 2022 at 104.594% of par, plus accrued and unpaid interest to, but excluding, the redemption date. We recorded a charge of $30,056 to Other expense (income), net in the fourth quarter of 2017 related to the early extinguishment of this debt, representing the call premium associated with the early redemption, as well as a write-off of unamortized deferred financing costs. In December 2017, IMI completed a private offering of $825,000 in aggregate principal amount of the 5 1 / 4 % Notes. The 5 1 / 4 % Notes were issued at par. The net proceeds of approximately $814,688 from the 5 1 / 4 % Notes after deducting discounts to the initial purchasers, together with the net proceeds from the Equity Offering and the Over-Allotment Option (each as defined in Note 12), were used to finance the purchase price of the IODC Transaction (as defined in Note 6), which closed on January 10, 2018, and to pay related fees and expenses. At December 31, 2017, the net proceeds from the 5 1 / 4 % Notes, together with the net proceeds of the Equity Offering, were used to temporarily repay borrowings under our Revolving Credit Facility and invest in money market funds. Each of the indentures for the notes provides that we may redeem the outstanding notes, in whole or in part, upon satisfaction of certain terms and conditions. In any redemption, we are also required to pay all accrued but unpaid interest on the outstanding notes. The following table presents the various redemption dates and prices of the senior or senior subordinated notes. The redemption dates reflect the date at or after which the notes may be redeemed at our option at a premium redemption price. After these dates, the notes may be redeemed at 100% of face value: Redemption Date 4 3 / 8 % Notes June 1, 6% Notes due 2023 August 15, CAD Notes due 2023 5 3 / 4 % Notes August 15, Euro Notes January 15, GBP Notes due 2025 November 15, 5 3 / 8 % Notes June 1, 4 7 / 8 % Notes 5 1 / 4 % Notes 2019 101.094 % (1) 102.000 % (1) 104.031 % (1) 100.958 % (1) — — — — — 2020 100.000 % 101.000 % 102.688 % 100.000 % 101.500 % (1) 101.938 % (1) — — — 2021 100.000 % 100.000 % 101.344 % 100.000 % 100.750 % 100.969 % 102.688 % (1) — — 2022 — 100.000 % 100.000 % 100.000 % 100.000 % 100.000 % 101.792 % 102.438 % (1) 102.625 % (1) 2023 — 100.000 % 100.000 % 100.000 % 100.000 % 100.000 % 100.896 % 101.625 % 101.750 % 2024 — — — 100.000 % 100.000 % 100.000 % 100.000 % 100.813 % 100.875 % 2025 — — — — 100.000 % 100.000 % 100.000 % 100.000 % 100.000 % 2026 — — — — — — 100.000 % 100.000 % 100.000 % 2027 — — — — — — — 100.000 % 100.000 % 2028 — — — — — — — — 100.000 % _______________________________________________________________________________ (1) Prior to this date, the relevant notes are redeemable, at our option, in whole or in part, at a specified redemption price or make-whole price, as the case may be. 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. c. Australian Dollar Term Loan On March 27, 2018, Iron Mountain Australia Group Pty, Ltd. ("IM Australia"), a wholly owned subsidiary of IMI, amended its AUD Term Loan (the "AUD Term Loan Amendment") to (i) increase the borrowings under the AUD Term Loan from 250,000 Australian dollars to 350,000 Australian dollars; (ii) increase the quarterly principal payments from 6,250 Australian dollars per year to 8,750 Australian dollars per year; and (iii) decrease the interest rate on the AUD Term Loan from BBSY (an Australian benchmark variable interest rate) plus 4.3% to BBSY plus 3.875% . The AUD Term Loan matures in September 2022. All indebtedness associated with the AUD Term Loan was issued at 99% of par. The net proceeds associated with the AUD Term Loan Amendment of approximately 99,000 Australian dollars (or approximately $75,621 , based upon the exchange rate between the Australian dollar and the United States dollar on March 29, 2018 (the closing date of the AUD Term Loan Amendment)), net of the original discount, were used to repay outstanding borrowings under the Revolving Credit Facility. Principal payments on the AUD Term Loan are to be paid in quarterly installments in an amount equivalent to an aggregate of 8,750 Australian dollars per year, with the remaining balance due September 22, 2022. The AUD Term Loan is secured by substantially all assets of IM Australia. IMI and the Guarantors guarantee all obligations under the AUD Term Loan. As of December 31, 2017, we had 242,188 Australian dollars ( $189,049 based upon the exchange rate between the United States dollar and the Australian dollar as of December 31, 2017) outstanding on the AUD Term Loan. As of December 31, 2018, we had 334,063 Australian dollars ( $235,645 based upon the exchange rate between the United States dollar and the Australian dollar as of December 31, 2018) outstanding on the AUD Term Loan. The interest rate in effect under the AUD Term Loan was 6.1% and 6.0% as of December 31, 2017 and 2018, respectively. d. UK Bilateral Revolving Credit Facility On September 24, 2018, IM UK and Iron Mountain (UK) Data Centre Limited entered into 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 was fully utilized on September 24, 2018 (the closing date of 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 as of December 31, 2018 is 3.1% . The initial net proceeds received under the UK Bilateral Facility of 138,250 British pounds sterling (or approximately $180,300 , based upon the exchange rate between the British pound sterling and the United States dollar on September 24, 2018), net of upfront fees, were used to repay borrowings under the Revolving Credit Facility. 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. e. Accounts Receivable Securitization Program In March 2015, we entered into a $250,000 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. Iron Mountain Information Management, LLC ("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 July 31, 2017, we amended the Accounts Receivable Securitization Program to (i) increase the maximum amount available from $250,000 to $275,000 and (ii) to extend the maturity date from March 6, 2018 to July 30, 2020, at which point all obligations become due. As of December 31, 2017 and 2018, the maximum availability allowed and amount outstanding under the Accounts Receivable Securitization Program was $258,973 and $221,673 , respectively. The interest rate in effect under the Accounts Receivable Securitization Program was 2.2% and 3.0% as of December 31, 2017 and 2018, 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. f. Mortgage Securitization Program In October 2016, we entered into a $50,000 mortgage securitization program (the "Mortgage Securitization Program") involving certain of our wholly owned subsidiaries with Goldman Sachs Mortgage Company (“Goldman Sachs”). Under the Mortgage Securitization Program, IMIM contributed certain real estate assets to its wholly owned special purpose entity, Iron Mountain Mortgage Finance I, LLC (the "Mortgage Securitization Special Purpose Subsidiary"). The Mortgage Securitization Special Purpose Subsidiary then used the real estate to secure a collateralized loan obtained from Goldman Sachs. The Mortgage Securitization Special Purpose Subsidiary is a consolidated subsidiary of IMI. The Mortgage Securitization Program is accounted for as a collateralized financing activity, rather than a sale of assets, and therefore: (i) real estate assets pledged as collateral remain as assets and borrowings are presented as liabilities on our Consolidated Balance Sheets, (ii) our Consolidated Statements of Operations reflects the associated charges for depreciation expense related to the pledged real estate and interest expense associated with the collateralized borrowings and (iii) borrowings and repayments under the collateralized loans are reflected as financing cash flows within our Consolidated Statements of Cash Flows. The Mortgage Securitization Program is scheduled to terminate on November 6, 2026, at which point all obligations become due. The outstanding amount under the Mortgage Securitization Program was $50,000 at both December 31, 2017 and 2018. The interest rate in effect under the Mortgage Securitization Program was 3.5% as of December 31, 2017 and 2018. g. 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. During the first quarter of 2017, we significantly expanded our utilization of the Cash Pools and reduced our utilization of our financing centers in Europe for purposes o

Selected Consolidated Financial

Selected Consolidated Financial Statements of Parent, Guarantors, Canada Company and Non-Guarantors	12 Months Ended
	Dec. 31, 2018
Selected Consolidated Financial Statements of Parent, Guarantors, Canada Company and Non-Guarantors
Selected Consolidated Financial Statements of Parent, Guarantors, Canada Company and Non-Guarantors	The following data summarizes the consolidating results of IMI on the equity method of accounting as of December 31, 2017 and 2018 and for the years ended December 31, 2016 , 2017 and 2018 and are prepared on the same basis as the consolidated financial statements. The Parent Notes, CAD Notes due 2023, GBP Notes due 2025 and the 5 3 / 8 % Notes are guaranteed by the subsidiaries referred to below as the Guarantors. These subsidiaries are 100% owned by IMI. The guarantees are full and unconditional, as well as joint and several. Additionally, IMI guarantees the CAD Notes due 2023, which were issued by Canada Company, the GBP Notes due 2025, which were issued by IM UK, and the 5 3 / 8 % Notes, which were issued by IM US Holdings. Canada Company and IM UK do not guarantee the Parent Notes. The subsidiaries that do not guarantee the Parent Notes, the CAD Notes due 2023, the GBP Notes due 2025 and the 5 3 / 8 % Notes are referred to below as the Non-Guarantors. As discussed below, the results of the Non-Guarantors for 2016 exclude the results of Canada Company, as those are presented in a separate column. The CAD Notes due 2021 were issued by Canada Company and registered under the Securities Act of 1933, as amended (the “Securities Act”). The CAD Notes due 2023 have not been registered under the Securities Act, or under the securities laws of any other jurisdiction. We redeemed the CAD Notes due 2021 in August 2017 and, therefore, as of December 31, 2017, Canada Company had no outstanding debt registered under the Securities Act that would require the presentation of Canada Company on a standalone basis in the accompanying consolidating financial statements. Accordingly, (i) the assets, liabilities and equity of Canada Company are presented as a component of the Non-Guarantor subsidiaries in the accompanying Consolidated Balance Sheets as of December 31, 2017 and 2018, (ii) the revenues, expenses and other comprehensive income (loss) of Canada Company are presented as a component of the Non-Guarantor subsidiaries in the Consolidated Statements of Operations and Comprehensive Income (Loss) for the years ended December 31, 2017 and 2018, and (iii) the operating, investing and financing cash flows for Canada Company are presented as a component of the Non-Guarantor subsidiaries in the Consolidated Statements of Cash Flows for the years ended December 31, 2017 and 2018. In the normal course of business we periodically change the ownership structure of our subsidiaries to meet the requirements of our business. In the event of such changes, we recast the prior period financial information within this footnote to conform to the current period presentation in the period such changes occur. Generally, these changes do not alter the designation of the underlying subsidiaries as Guarantors or Non-Guarantors. However, they may change whether the underlying subsidiary is owned by the Parent, a Guarantor, Canada Company or a Non-Guarantor. If such a change occurs, the amount of investment in subsidiaries in the below Consolidated Balance Sheets and equity in the earnings (losses) of subsidiaries, net of tax in the below Consolidated Statements of Operations and Comprehensive Income (Loss) with respect to the relevant Parent, Guarantors, Canada Company, Non-Guarantors and Eliminations columns also would change. CONSOLIDATED BALANCE SHEETS December 31, 2017 Parent Guarantors Non- Guarantors Eliminations Consolidated Assets Current Assets: Cash and cash equivalents(1) $ 2,433 $ 634,317 $ 383,675 $ (94,726 ) $ 925,699 Accounts receivable — 32,972 802,770 — 835,742 Intercompany receivable 332,293 149,731 — (482,024 ) — Prepaid expenses and other 1,579 103,643 83,681 (29 ) 188,874 Total Current Assets 336,305 920,663 1,270,126 (576,779 ) 1,950,315 Property, Plant and Equipment, Net 316 2,030,875 1,386,488 — 3,417,679 Other Assets, Net: Long-term notes receivable from affiliates and intercompany receivable 4,578,995 — — (4,578,995 ) — Investment in subsidiaries 1,858,045 885,999 — (2,744,044 ) — Goodwill — 2,577,310 1,492,957 — 4,070,267 Other — 796,913 737,228 — 1,534,141 Total Other Assets, Net 6,437,040 4,260,222 2,230,185 (7,323,039 ) 5,604,408 Total Assets $ 6,773,661 $ 7,211,760 $ 4,886,799 $ (7,899,818 ) $ 10,972,402 Liabilities and Equity Intercompany Payable $ — $ — $ 482,024 $ (482,024 ) $ — Debit Balances Under Cash Pool — 56,233 38,493 (94,726 ) — Current Portion of Long-term Debt — 54,247 92,082 (29 ) 146,300 Total Other Current Liabilities 235,062 527,549 421,262 — 1,183,873 Long-term Debt, Net of Current Portion 4,232,759 758,166 1,906,046 — 6,896,971 Long-term Notes Payable to Affiliates and Intercompany Payable — 4,578,995 — (4,578,995 ) — Other Long-term Liabilities — 113,024 241,974 — 354,998 Commitments and Contingencies (see Note 10) Redeemable Noncontrolling Interests (see Note 2.v.) 8,402 — 83,016 — 91,418 Total Iron Mountain Incorporated Stockholders' Equity 2,297,438 1,123,546 1,620,498 (2,744,044 ) 2,297,438 Noncontrolling Interests — — 1,404 — 1,404 Total Equity 2,297,438 1,123,546 1,621,902 (2,744,044 ) 2,298,842 Total Liabilities and Equity $ 6,773,661 $ 7,211,760 $ 4,886,799 $ (7,899,818 ) $ 10,972,402 ______________________________________________________________ (1) Included within Cash and Cash Equivalents at December 31, 2017 is approximately $38,400 and $62,000 of cash on deposit associated with our Cash Pools for the Guarantors and Non-Guarantors, respectively. See Note 4 for more information on our Cash Pools. CONSOLIDATED BALANCE SHEETS (Continued) December 31, 2018 Parent Guarantors Non- Guarantors Eliminations Consolidated Assets Current Assets: Cash and cash equivalents(1) $ 132 $ 61,650 $ 169,318 $ (65,615 ) $ 165,485 Accounts receivable — 47,900 798,989 — 846,889 Intercompany receivable — 818,463 — (818,463 ) — Prepaid expenses and other 93 108,879 86,797 (29 ) 195,740 Total Current Assets 225 1,036,892 1,055,104 (884,107 ) 1,208,114 Property, Plant and Equipment, Net 190 3,002,104 1,487,263 — 4,489,557 Other Assets, Net: Long-term notes receivable from affiliates and intercompany receivable 4,954,686 — — (4,954,686 ) — Investment in subsidiaries 1,885,174 1,006,144 — (2,891,318 ) — Goodwill — 2,858,539 1,582,491 — 4,441,030 Other — 979,483 734,063 — 1,713,546 Total Other Assets, Net 6,839,860 4,844,166 2,316,554 (7,846,004 ) 6,154,576 Total Assets $ 6,840,275 $ 8,883,162 $ 4,858,921 $ (8,730,111 ) $ 11,852,247 Liabilities and Equity Intercompany Payable $ 462,927 $ — $ 355,536 $ (818,463 ) $ — Debit Balances Under Cash Pools — 10,612 55,003 (65,615 ) — Current Portion of Long-term Debt — 63,703 62,732 (29 ) 126,406 Total Other Current Liabilities 268,373 616,826 451,073 — 1,336,272 Long-term Debt, Net of Current Portion 4,223,822 1,877,649 1,914,946 — 8,016,417 Long-term Notes Payable to Affiliates and Intercompany Payable — 4,954,686 — (4,954,686 ) — Other Long-term Liabilities 973 115,994 300,064 — 417,031 Commitments and Contingencies (see Note 10) Redeemable Noncontrolling Interests (see Note 2.v.) — — 70,532 — 70,532 Total Iron Mountain Incorporated Stockholders' Equity 1,884,180 1,243,692 1,647,626 (2,891,318 ) 1,884,180 Noncontrolling Interests — — 1,409 — 1,409 Total Equity 1,884,180 1,243,692 1,649,035 (2,891,318 ) 1,885,589 Total Liabilities and Equity $ 6,840,275 $ 8,883,162 $ 4,858,921 $ (8,730,111 ) $ 11,852,247 ______________________________________________________________ (1) Included within Cash and Cash Equivalents at December 31, 2018 is approximately $57,200 and $12,700 of cash on deposit associated with our Cash Pools for the Guarantors and Non-Guarantors, respectively. See Note 4 for more information on our Cash Pools. CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) Year Ended December 31, 2016 Parent Guarantors Canada Company Non- Guarantors Eliminations Consolidated Revenues: Storage rental $ — $ 1,341,840 $ 125,335 $ 675,730 $ — $ 2,142,905 Service — 822,515 64,147 481,886 — 1,368,548 Intercompany revenues — 3,994 — 80,788 (84,782 ) — Total Revenues — 2,168,349 189,482 1,238,404 (84,782 ) 3,511,453 Operating Expenses: Cost of sales (excluding depreciation and amortization) — 895,595 29,418 642,764 — 1,567,777 Intercompany cost of sales — 17,496 63,292 3,994 (84,782 ) — Selling, general and administrative 668 668,975 17,786 300,903 — 988,332 Depreciation and amortization 179 272,831 15,480 163,836 — 452,326 Loss (Gain) on disposal/write-down of property, plant and equipment (excluding real estate), net — 1,328 310 (226 ) — 1,412 Total Operating Expenses 847 1,856,225 126,286 1,111,271 (84,782 ) 3,009,847 Operating (Loss) Income (847 ) 312,124 63,196 127,133 — 501,606 Interest Expense (Income), Net 110,659 (7,741 ) 40,546 167,198 — 310,662 Other Expense (Income), Net 71,335 (13,247 ) 10,341 (24,129 ) — 44,300 (Loss) Income from Continuing Operations Before (Benefit) Provision for Income Taxes and Gain on Sale of Real Estate (182,841 ) 333,112 12,309 (15,936 ) — 146,644 Provision (Benefit) for Income Taxes — 30,860 7,354 6,730 — 44,944 Gain on Sale of Real Estate, Net of Tax — (2,121 ) (59 ) — — (2,180 ) Equity in the (Earnings) Losses of Subsidiaries, Net of Tax (287,665 ) (22,662 ) (5,040 ) (6,832 ) 322,199 — Net Income (Loss) 104,824 327,035 10,054 (15,834 ) (322,199 ) 103,880 Income (Loss) from Discontinued Operations, Net of Tax — 1,642 1,818 (107 ) — 3,353 Net Income (Loss) 104,824 328,677 11,872 (15,941 ) (322,199 ) 107,233 Less: Net Income (Loss) Attributable to Noncontrolling Interests — — — 2,409 — 2,409 Net Income (Loss) Attributable to Iron Mountain Incorporated $ 104,824 $ 328,677 $ 11,872 $ (18,350 ) $ (322,199 ) $ 104,824 Net Income (Loss) $ 104,824 $ 328,677 $ 11,872 $ (15,941 ) $ (322,199 ) $ 107,233 Other Comprehensive Income (Loss): Foreign Currency Translation Adjustment 1,107 — (6,123 ) (30,625 ) — (35,641 ) Market Value Adjustments for Securities — (734 ) — — — (734 ) Equity in Other Comprehensive (Loss) Income of Subsidiaries (38,763 ) (3,164 ) (679 ) (6,123 ) 48,729 — Total Other Comprehensive (Loss) Income (37,656 ) (3,898 ) (6,802 ) (36,748 ) 48,729 (36,375 ) Comprehensive Income (Loss) 67,168 324,779 5,070 (52,689 ) (273,470 ) 70,858 Comprehensive Income (Loss) Attributable to Noncontrolling Interests — — — 3,690 — 3,690 Comprehensive Income (Loss) Attributable to Iron Mountain Incorporated $ 67,168 $ 324,779 $ 5,070 $ (56,379 ) $ (273,470 ) $ 67,168 CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (Continued) Year Ended December 31, 2017 Parent Guarantors Non- Guarantors Eliminations Consolidated Revenues: Storage rental $ — $ 1,437,466 $ 940,091 $ — $ 2,377,557 Service — 863,623 604,398 — 1,468,021 Intercompany revenues — 4,577 24,613 (29,190 ) — Total Revenues — 2,305,666 1,569,102 (29,190 ) 3,845,578 Operating Expenses: Cost of sales (excluding depreciation and amortization) — 925,385 759,933 — 1,685,318 Intercompany cost of sales — 24,613 4,577 (29,190 ) — Selling, general and administrative 161 654,213 330,591 — 984,965 Depreciation and amortization 167 309,883 212,326 — 522,376 Intangible impairments — 3,011 — — 3,011 (Gain) Loss on disposal/write-down of property, plant and equipment (excluding real estate), net — (999 ) 1,798 — 799 Total Operating Expenses 328 1,916,106 1,309,225 (29,190 ) 3,196,469 Operating (Loss) Income (328 ) 389,560 259,877 — 649,109 Interest Expense (Income), Net 163,541 6,996 183,038 — 353,575 Other Expense (Income), Net 47,176 9,112 23,141 — 79,429 (Loss) Income from Continuing Operations Before Provision (Benefit) for Income Taxes and Gain on Sale of Real Estate (211,045 ) 373,452 53,698 — 216,105 Provision (Benefit) for Income Taxes — 5,854 20,093 — 25,947 Gain on Sale of Real Estate, Net of Tax — — (1,565 ) — (1,565 ) Equity in the (Earnings) Losses of Subsidiaries, Net of Tax (394,866 ) (25,385 ) — 420,251 — (Loss) Income from Continuing Operations 183,821 392,983 35,170 (420,251 ) 191,723 (Loss) Income from Discontinued Operations, Net of Tax — (4,370 ) (1,921 ) — (6,291 ) Net Income (Loss) 183,821 388,613 33,249 (420,251 ) 185,432 Less: Net Income (Loss) Attributable to Noncontrolling Interests — — 1,611 — 1,611 Net Income (Loss) Attributable to Iron Mountain Incorporated $ 183,821 $ 388,613 $ 31,638 $ (420,251 ) $ 183,821 Net Income (Loss) $ 183,821 $ 388,613 $ 33,249 $ (420,251 ) $ 185,432 Other Comprehensive Income (Loss): Foreign Currency Translation Adjustment (15,015 ) — 123,579 — 108,564 Equity in Other Comprehensive Income (Loss) of Subsidiaries 123,599 82,127 — (205,726 ) — Total Other Comprehensive Income (Loss) 108,584 82,127 123,579 (205,726 ) 108,564 Comprehensive Income (Loss) 292,405 470,740 156,828 (625,977 ) 293,996 Comprehensive Income (Loss) Attributable to Noncontrolling Interests — — 1,591 — 1,591 Comprehensive Income (Loss) Attributable to Iron Mountain Incorporated $ 292,405 $ 470,740 $ 155,237 $ (625,977 ) $ 292,405 CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (Continued) Year Ended December 31, 2018 Parent Guarantors Non- Guarantors Eliminations Consolidated Revenues: Storage rental $ — $ 1,600,230 $ 1,022,225 $ — $ 2,622,455 Service — 970,678 632,628 — 1,603,306 Intercompany revenues — 4,759 18,439 (23,198 ) — Total Revenues — 2,575,667 1,673,292 (23,198 ) 4,225,761 Operating Expenses: Cost of sales (excluding depreciation and amortization) — 1,007,794 793,788 — 1,801,582 Intercompany cost of sales — 18,439 4,759 (23,198 ) — Selling, general and administrative (288 ) 711,702 327,561 — 1,038,975 Depreciation and amortization 122 403,480 235,912 — 639,514 (Gain) Loss on disposal/write-down of property, plant and equipment (excluding real estate), net — (1,489 ) (8,329 ) — (9,818 ) Total Operating Expenses (166 ) 2,139,926 1,353,691 (23,198 ) 3,470,253 Operating (Loss) Income 166 435,741 319,601 — 755,508 Interest Expense (Income), Net 199,955 5,692 203,642 — 409,289 Other Expense (Income), Net 2,328 16,744 (30,764 ) — (11,692 ) (Loss) Income from Continuing Operations Before Provision (Benefit) for Income Taxes and Gain on Sale of Real Estate (202,117 ) 413,305 146,723 — 357,911 (Benefit) Provision for Income Taxes — (2,418 ) 38,681 — 36,263 Gain on Sale of Real Estate, Net of Tax — (836 ) (54,492 ) — (55,328 ) Equity in the (Earnings) Losses of Subsidiaries, Net of Tax (565,468 ) (156,993 ) — 722,461 — Income (Loss) from Continuing Operations 363,351 573,552 162,534 (722,461 ) 376,976 (Loss) Income from Discontinued Operations, Net of Tax — (12,283 ) (144 ) — (12,427 ) Net Income (Loss) 363,351 561,269 162,390 (722,461 ) 364,549 Less: Net Income (Loss) Attributable to Noncontrolling Interests — — 1,198 — 1,198 Net Income (Loss) Attributable to Iron Mountain Incorporated $ 363,351 $ 561,269 $ 161,192 $ (722,461 ) $ 363,351 Net Income (Loss) $ 363,351 $ 561,269 $ 162,390 $ (722,461 ) $ 364,549 Other Comprehensive Income (Loss): Foreign Currency Translation Adjustment 11,070 — (175,177 ) — (164,107 ) Change in Fair Value of Interest Rate Swap Agreements (973 ) — — — (973 ) Equity in Other Comprehensive Income (Loss) of Subsidiaries (171,772 ) (139,971 ) — 311,743 — Total Other Comprehensive Income (Loss) (161,675 ) (139,971 ) (175,177 ) 311,743 (165,080 ) Comprehensive Income (Loss) 201,676 421,298 (12,787 ) (410,718 ) 199,469 Comprehensive Income (Loss) Attributable to Noncontrolling Interests — — (2,207 ) — (2,207 ) Comprehensive Income (Loss) Attributable to Iron Mountain Incorporated $ 201,676 $ 421,298 $ (10,580 ) $ (410,718 ) $ 201,676 CONSOLIDATED STATEMENTS OF CASH FLOWS Year Ended December 31, 2016 Parent Guarantors Canada Company Non- Guarantors Eliminations Consolidated Cash Flows from Operating Activities: Cash Flows from Operating Activities $ (168,389 ) $ 633,808 $ 41,885 $ 33,912 $ — $ 541,216 Cash Flows from Operating Activities-Discontinued Operations — 1,076 1,710 (107 ) — 2,679 Cash Flows from Operating Activities (168,389 ) 634,884 43,595 33,805 — 543,895 Cash Flows from Investing Activities: Capital expenditures — (192,736 ) (10,284 ) (125,583 ) — (328,603 ) Cash paid for acquisitions, net of cash acquired — 4,007 (2,405 ) (293,567 ) — (291,965 ) Intercompany loans to subsidiaries 175,092 (166,400 ) (20,185 ) — 11,493 — Investment in subsidiaries (1,585 ) (1,585 ) — — 3,170 — Acquisitions of customer relationships and customer inducements — (40,217 ) (366 ) (10,183 ) — (50,766 ) Net proceeds from Divestments (see Note 6) — — 4,032 26,622 — 30,654 Proceeds from sales of property and equipment and other, net (including real estate) and proceeds from involuntary conversion of property and equipment — 5,235 30 2,712 — 7,977 Cash Flows from Investing Activities 173,507 (391,696 ) (29,178 ) (399,999 ) 14,663 (632,703 ) Cash Flows from Investing Activities-Discontinued Operations — 78,564 16,153 1,995 — 96,712 Cash Flows from Investing Activities 173,507 (313,132 ) (13,025 ) (398,004 ) 14,663 (535,991 ) Cash Flows from Financing Activities: Repayment of revolving credit and term loan facilities, bridge facilities and other debt (1,163,654 ) (7,511,941 ) (1,273,228 ) (4,902,617 ) — (14,851,440 ) Proceeds from revolving credit and term loan facilities, bridge facilities and other debt 1,150,628 7,144,874 1,130,193 5,118,693 — 14,544,388 Net proceeds from sales of senior notes 492,500 246,250 186,693 — — 925,443 Debt (repayment to) financing from and equity (distribution to) contribution from noncontrolling interests, net — — — (466 ) — (466 ) Intercompany loans from parent — (183,454 ) (67,514 ) 262,461 (11,493 ) — Equity contribution from parent — 1,585 — 1,585 (3,170 ) — Parent cash dividends (505,871 ) — — — — (505,871 ) Net proceeds (payments) associated with employee stock-based awards 31,922 — — — — 31,922 Payment of debt financing and stock issuance costs (8,389 ) (3,489 ) (895 ) (5,830 ) — (18,603 ) Cash Flows from Financing Activities (2,864 ) (306,175 ) (24,751 ) 473,826 (14,663 ) 125,373 Cash Flows from Financing Activities-Discontinued Operations — — — — — — Cash Flows from Financing Activities (2,864 ) (306,175 ) (24,751 ) 473,826 (14,663 ) 125,373 Effect of exchange rates on cash and cash equivalents — — (1,891 ) (23,283 ) — (25,174 ) Increase (Decrease) in cash and cash equivalents 2,254 15,577 3,928 86,344 — 108,103 Cash and cash equivalents, including Restricted Cash, beginning of year 151 7,803 13,182 107,245 — 128,381 Cash and cash equivalents, including Restricted Cash, end of year $ 2,405 $ 23,380 $ 17,110 $ 193,589 $ — $ 236,484 CONSOLIDATED STATEMENTS OF CASH FLOWS (Continued) Year Ended December 31, 2017 Parent Guarantors Non- Eliminations Consolidated Cash Flows from Operating Activities: Cash Flows from Operating Activities $ (203,403 ) $ 738,256 $ 189,406 $ — $ 724,259 Cash Flows from Operating Activities-Discontinued Operations — (1,345 ) (1,946 ) — (3,291 ) Cash Flows from Operating Activities (203,403 ) 736,911 187,460 — 720,968 Cash Flows from Investing Activities: Capital expenditures — (235,996 ) (107,135 ) — (343,131 ) Cash paid for acquisitions, net of cash acquired — (96,946 ) (122,759 ) — (219,705 ) Intercompany loans to subsidiaries (990,635 ) (344,919 ) — 1,335,554 — Investment in subsidiaries (16,170 ) — — 16,170 — Acquisitions of customer relationships and customer inducements — (63,765 ) (11,420 ) — (75,185 ) Net proceeds from Divestments (see Note 6) — — 29,236 — 29,236 Proceeds from sales of property and equipment and other, net (including real estate) and proceeds from involuntary conversion of property and equipment — 12,963 (3,626 ) — 9,337 Cash Flows from Investing Activities-Continuing Operations (1,006,805 ) (728,663 ) (215,704 ) 1,351,724 (599,448 ) Cash Flows from Investing Activities-Discontinued Operations — — — — — Cash Flows from Investing Activities (1,006,805 ) (728,663 ) (215,704 ) 1,351,724 (599,448 ) Cash Flows from Financing Activities: Repayment of revolving credit and term loan facilities, bridge facilities and other debt (262,579 ) (8,077,553 ) (6,089,563 ) — (14,429,695 ) Proceeds from revolving credit and term loan facilities, bridge facilities and other debt 224,660 7,650,617 6,041,778 — 13,917,055 Early retirement of senior subordinated and senior notes (1,031,554 ) — (715,302 ) — (1,746,856 ) Net proceeds from sales of senior notes 2,134,870 — 522,078 — 2,656,948 Debit balances (payments) under cash pools — 56,233 38,493 (94,726 ) — Debt (repayment to) financing from and equity (distribution to) contribution from noncontrolling interests, net — — 9,079 — 9,079 Intercompany loans from parent — 982,783 352,771 (1,335,554 ) — Equity contribution from parent — — 16,170 (16,170 ) — Parent cash dividends (439,999 ) — — — (439,999 ) Net proceeds (payments) associated with employee stock-based awards 13,095 — — — 13,095 Net proceeds associated with the Equity Offering, including Over-Allotment Option 516,462 — — — 516,462 Net proceeds associated with the At The Market (ATM) Program 59,129 — — — 59,129 Payment of debt financing and stock issuance costs (3,848 ) (9,391 ) (1,554 ) — (14,793 ) Cash Flows from Financing Activities-Continuing Operations 1,210,236 602,689 173,950 (1,446,450 ) 540,425 Cash Flows from Financing Activities-Discontinued Operations — — — — — Cash Flows from Financing Activities 1,210,236 602,689 173,950 (1,446,450 ) 540,425 Effect of exchange rates on cash and cash equivalents — — 27,270 — 27,270 Increase (Decrease) in cash and cash equivalents 28 610,937 172,976 (94,726 ) 689,215 Cash and cash equivalents, including Restricted Cash, beginning of year 2,405 23,380 210,699 — 236,484 Cash and cash equivalents, including Restricted Cash, end of year $ 2,433 $ 634,317 $ 383,675 $ (94,726 ) $ 925,699 CONSOLIDATED STATEMENTS OF CASH FLOWS (Continued) Year Ended December 31, 2018 Parent Guarantors Non- Eliminations Consolidated Cash Flows from Operating Activities: Cash Flows from Operating Activities-Continuing Operations $ (217,819 ) $ 877,864 $ 276,499 $ — $ 936,544 Cash Flows from Operating Activities-Discontinued Operations — (995 ) — — (995 ) Cash Flows from Operating Activities (217,819 ) 876,869 276,499 — 935,549 Cash Flows from Investing Activities: Capital expenditures — (312,856 ) (147,206 ) — (460,062 ) Cash paid for acquisitions, net of cash acquired — (1,338,888 ) (419,669 ) — (1,758,557 ) Intercompany loans to subsidiaries 805,799 90,569 — (896,368 ) — Acquisitions of customer relationships, customer inducements and data center lease-based intangibles — (73,429 ) (25,258 ) — (98,687 ) Net proceeds from Divestments (see Note 6) — 1,019 — — 1,019 Proceeds from sales of property and equipment and other, net (including real estate) and proceeds from involuntary conversion of property and equipment — 299 85,860 — 86,159 Cash Flows from Investing Activities-Continuing Operations 805,799 (1,633,286 ) (506,273 ) (896,368 ) (2,230,128 ) Cash Flows from Investing Activities-Discontinued Operations — 8,250 — — 8,250 Cash Flows from Investing Activities 805,799 (1,625,036 ) (506,273 ) (896,368 ) (2,221,878 ) Cash Flows from Financing Activities: Repayment of revolving credit and term loan facilities, bridge facilities and other debt — (7,355,086 ) (6,837,053 ) — (14,192,139 ) Proceeds from revolving credit and term loan facilities, bridge facilities and other debt — 8,445,509 6,906,105 — 15,351,614 Debit (payments) balances under cash pools — (45,621 ) 16,510 29,111 — Debt (repayment to) financing from and equity (distribution to) contribution from noncontrolling interests, net — — (2,523 ) — (2,523 ) Intercompany loans from parent — (856,911 ) (39,457 ) 896,368 — Parent cash dividends (673,635 ) — — — (673,635 ) Net payments associated with employee stock-based awards (1,142 ) — — — (1,142 ) Net proceeds associated with the Equity Offering, including Over-Allotment Option 76,192 — — — 76,192 Net proceeds associated with the At The Market (ATM) Program 8,716 — — — 8,716 Payment of debt financing and stock issuance costs (412 ) (12,391 ) (3,602 ) — (16,405 ) Cash Flows from Financing Activities-Continuing Operations (590,281 ) 175,500 39,980 925,479 550,678 Cash Flows from Financing Activities-Discontinued Operations — — — — — Cash Flows from Financing Activities (590,281 ) 175,500 39,980 925,479 550,678 Effect of exchange rates on cash and cash equivalents — — (24,563 ) — (24,563 ) (Decrease) Increase in cash and cash equivalents (2,301 ) (572,667 ) (214,357 ) 29,111 (760,214 ) Cash and cash equivalents, including Restricted Cash, beginning of year 2,433 634,317 383,675 (94,726 ) 925,699 Cash and cash equivalents, including Restricted Cash, end of year $ 132 $ 61,650 $ 169,318 $ (65,615 ) $ 165,485

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
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. We have assessed our acquisitions in accordance with the guidance in ASU 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business . a. Acquisition of Recall On May 2, 2016, we completed the Recall Transaction. At the closing of the Recall Transaction, we paid approximately $331,800 in cash and issued 50,233,412 shares of our common stock which, based on the closing price of our common stock as of April 29, 2016 (the last day of trading on the NYSE prior to the closing of the Recall Transaction) of $ 36.53 per share, resulted in a total purchase price to Recall shareholders of approximately $2,166,900 . Regulatory Approvals In connection with the acquisition of Recall, we sought regulatory approval of the Recall Transaction from the United States Department of Justice (the "DOJ"), the Australian Competition and Consumer Commission (the "ACCC"), the Canada Competition Bureau (the "CCB") and the United Kingdom Competition and Markets Authority (the "CMA"). As part of the regulatory approval process, we agreed to make certain divestments, which are described below, in order to address competition concerns raised by the DOJ, the ACCC, the CCB and the CMA in respect of the Recall Transaction (the "Divestments"). See Note 13 for additional information regarding the presentation of the Divestments in our Consolidated Statements of Operations and our Consolidated Statements of Cash Flows for the years ended December 31, 2016, 2017 and 2018, respectively. Divestments i. United States The DOJ’s approval of the Recall Transaction was subject to the following divestments being made by us following the closing of the Recall Transaction: • Recall’s records and information management facilities, including all associated tangible and intangible assets, in the following 13 United States cities: Buffalo, New York; Charlotte, North Carolina; Detroit, Michigan; Durham, North Carolina; Greenville/Spartanburg, South Carolina; Kansas City, Kansas/Missouri; Nashville, Tennessee; Pittsburgh, Pennsylvania; Raleigh, North Carolina; Richmond, Virginia; San Antonio, Texas; Tulsa, Oklahoma; and San Diego, California (the “Initial United States Divestments”); and • Recall’s records and information management facility in Seattle, Washington and certain of Recall’s records and information management facilities in Atlanta, Georgia, including in each case associated tangible and intangible assets (the “Seattle/Atlanta Divestments”). On May 4, 2016, we completed the sale of the Initial United States Divestments to Access CIG, LLC, a privately held provider of information management services throughout the United States (“Access CIG”), for total consideration of approximately $80,000 , subject to adjustments (the “Access Sale”). Of the total consideration, we received $55,000 in cash proceeds upon closing of the Access Sale, and were entitled to receive up to $25,000 of additional cash proceeds (the "Access Contingent Consideration"). The Access Contingent Consideration was subject to adjustments subsequent to the closing of the Access Sale. We were also subject to potential indemnity obligations as part of the Access Sale. We recorded a non-trade receivable related to our estimate of the Access Contingent Consideration included in Prepaid expenses and other in our Consolidated Balance Sheet as of December 31, 2017. During the third quarter of 2018, we settled the Access Contingent Consideration with Access CIG, as well as indemnification claims Access CIG previously raised in connection with the Access Sale. Changes to the realizable value of the Access Contingent Consideration were recorded to our Consolidated Statement of Operations as a component of discontinued operations. The assets subject to the Access Sale were acquired in the Recall Transaction and, therefore, the estimated fair value of the Initial United States Divestments (including the estimated fair value of the Access Contingent Consideration) has been reflected in the allocation of the purchase price for Recall as a component of “Fair Value of Recall Divestments”. Our policy related to the recognition of contingent consideration (from a seller’s perspective) is to recognize contingent consideration at its estimated fair value upon closing of the transaction. Our policy related to the subsequent measurement of contingent consideration (from a seller’s perspective) is (i) to recognize contingent consideration in excess of our original estimate of fair value upon cash receipt of such consideration and (ii) to recognize any impairment of the contingent consideration compared to our original estimate in the period in which we determine such an impairment exists. On December 29, 2016, we completed the sale of the Seattle/Atlanta Divestments and the Canadian Divestments (as defined below) to Arkive Information Management LLC and Arkive Information Management Ltd., both information management companies (collectively, "ARKIVE"), for total consideration of approximately $50,000 , subject to adjustments (the “ARKIVE Sale”). Of the total consideration, we received approximately $45,000 in cash proceeds upon the closing of the ARKIVE Sale and the remaining consideration is held in escrow. Following a notice and resolution period, ARKIVE may be entitled to receive from us cash payments, up to the total consideration paid by ARKIVE, based on lost revenues attributable to the acquired customer base calculated based upon the 24-month period following the closing of the ARKIVE sale. The assets included in the Seattle/Atlanta Divestments and the Recall Canadian Divestments (as defined below) were acquired in the Recall Transaction and, therefore, the estimated fair value of the Seattle/Atlanta Divestments and the Recall Canadian Divestments (as determined based upon the total consideration for the ARKIVE Sale) has been reflected in the allocation of the purchase price for Recall as a component of "Fair Value of Recall Divestments". ii. Australia The ACCC approved the Recall Transaction after accepting an undertaking from us pursuant to section 87B of the Australian Competition and Consumer Act 2010 (Cth) (the “ACCC Undertaking”). Pursuant to the ACCC Undertaking, we agreed to divest the majority of our Australian operations as they existed prior to the closing of the Recall Transaction by way of a share sale, which effectively involved the sale of our Australian business (as it existed prior to the closing of the Recall Transaction) other than our data management business throughout Australia and our records and information management business in the Northern Territory of Australia, except in relation to customers who have holdings in other Australian states or territories (the “Australia Divestment Business”). On October 31, 2016, after receiving approval of the proposed transaction from the ACCC, we completed the sale of the Australia Divestment Business (the “Australia Sale”) to a consortium led by Housatonic Partners (the “Australia Divestment Business Purchasers”) for total consideration of approximately 70,000 Australian dollars (or approximately $53,200 , based upon the exchange rate between the United States dollar and the Australian dollar as of October 31, 2016), subject to adjustments. The total consideration consists of (i) 35,000 Australian dollars in cash received upon the closing of the Australia Sale and (ii) 35,000 Australian dollars in the form of a note due from the Australia Divestment Business Purchasers to us (the “Bridging Loan Note”). The Bridging Loan Note bore interest at 3.3% per annum and matured on December 29, 2017, at which point all outstanding obligations became due. During the fourth quarter of 2017, we received proceeds for the full outstanding amount of the Bridging Loan Note. The total consideration for the Australia Sale is subject to certain adjustments associated with customer attrition subsequent to the closing of the Australia Sale. We recorded a charge of $15,417 to other expense, net associated with the loss on disposal of the Australia Divestment Business during the year ended December 31, 2016, representing the excess of the carrying value of the Australia Divestment Business compared to its fair value (less costs to sell). Approximately $7,099 of cumulative translation adjustment associated with the Australia Divestment Business was reclassified from accumulated other comprehensive items, net and reduced the loss recorded on the sale of the Australia Divestment Business by the same amount during the year ended December 31, 2016. iii. Canada The CCB approved the Recall Transaction on the basis of us divesting the following assets: • Recall’s record and information management facilities, including associated tangible and intangible assets and employees, in Edmonton, Alberta and Montreal (Laval), Quebec and certain of Recall’s record and information management facilities, including all associated tangible and intangible assets and employees, in Calgary, Alberta and Toronto, Ontario, (the “Recall Canadian Divestments”); and • One of our records and information management facilities in Vancouver (Burnaby), British Columbia and one of our records and information management facilities in Ottawa, Ontario, including associated tangible and intangible assets and employees (the “Iron Mountain Canadian Divestments” and together with the Recall Canadian Divestments, the "Canadian Divestments"). On December 29, 2016, we completed the sale of the Canadian Divestments (along with the Seattle/Atlanta Divestments) in the ARKIVE Sale, as discussed above. We recorded a charge of $1,421 to other expense, net associated with the loss on disposal of the Iron Mountain Canadian Divestments during the year ended December 31, 2016, representing the excess of the carrying value of the Iron Mountain Canadian Divestments compared to its fair value (as determined based upon the total consideration received in the ARKIVE Sale), less costs to sell. iv. United Kingdom On June 16, 2016, the CMA published its findings, pursuant to which we agreed to divest Recall’s record and information management facilities, including associated tangible and intangible assets and employees, in the Aberdeen and Dundee areas of Scotland (the “UK Divestments”). On December 9, 2016, we completed the sale of the UK Divestments (the "UK Sale") to the Oasis Group for total consideration of approximately 1,800 British pounds sterling (or approximately $2,200 , based upon the exchange rate between the United States dollar and the British pound sterling as of December 9, 2016), subject to adjustments. The assets included in the UK Sale were acquired in the Recall Transaction and, therefore, the estimated fair value of the UK Divestments (as determined based upon the total consideration received in the UK Sale) has been reflected in the allocation of the purchase price for Recall as a component of “Fair Value of Recall Divestments”. b. 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 addition to the amount paid at the closing of the IODC Transaction, there was the potential of $35,000 in additional payments associated with the execution of future customer contracts through the one-year anniversary of the IODC Transaction, of which approximately $31,000 is accrued at December 31, 2018. This amount is reported as a third-party commissions asset as a component of Other within Other assets, net, on our Consolidated Balance Sheet at December 31, 2018. We have accounted for the IODC Transaction as an acquisition of a business in accordance with the guidance in ASU 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business . _______________________________________________________________________________ The unaudited consolidated pro forma financial information (the "Pro Forma Financial Information") below summarizes the combined results of us, Recall and IODC on a pro forma basis as if the Recall Transaction had occurred on January 1, 2015, and the IODC Transaction had occurred on January 1, 2017. The Pro Forma Financial Information is presented for informational purposes and is not necessarily indicative of the results of operations that would have been achieved if the acquisitions had taken place on the dates indicated above. The Pro Forma Financial Information for the year ended December 31, 2016, includes adjustments to convert Recall's historical results from International Financial Reporting Standards to GAAP, purchase accounting adjustments (including amortization of acquired intangible assets, depreciation of acquired property, plant and equipment and amortization of favorable and unfavorable leases), stock-based compensation and related tax effects. Through December 31, 2018, we and Recall have collectively incurred $140,661 of operating expenditures to complete the Recall Transaction (including advisory and professional fees and costs to complete the Divestments and to provide transitional services required to support the divested businesses during a transition period) and we and IODC have collectively incurred $28,064 of operating expenditures to complete the IODC Transaction (including advisory and professional fees). The operating expenditures to complete the Recall Transaction and the IODC Transaction have been reflected within the results of operations in the Pro Forma Financial Information as if they were incurred on January 1, 2015 and January 1, 2017, respectively. The costs we have incurred to integrate Recall with our existing operations (including moving, severance, facility upgrade, REIT integration and system upgrade costs) are reflected in the Pro Forma Financial Information in the period in which they were incurred. The Pro Forma Financial Information for the year ended December 31, 2016, excludes from income (loss) from continuing operations the results of operations of the Initial United States Divestments, the Seattle/Atlanta Divestments, the Recall Canadian Divestments and the UK Divestments, as these businesses are presented as discontinued operations. See Note 13 for information regarding our conclusion with respect to the presentation of these divestments as discontinued operations. The results of the Australia Divestment Business and the Iron Mountain Canadian Divestments are included within the results from continuing operations in the Pro Forma Financial Information through the closing date of the Australia Sale, in the case of the Australia Divestment Business, and through the closing date of the ARKIVE Sale, in the case of the Iron Mountain Canadian Divestments, as these businesses do not qualify for discontinued operations. See Note 13 for information regarding our conclusion that these divestments do not meet the criteria to be reported as discontinued operations. The Australia Divestment Business and the Iron Mountain Canadian Divestments, collectively, represent $46,655 of total revenues and $2,603 of total income from continuing operations for the year ended December 31, 2016, respectively. (Unaudited) Year Ended December 31, 2016(1) 2017(2) 2018(2) Total Revenues $ 3,763,929 $ 3,983,016 $ 4,229,251 Income (Loss) from Continuing Operations $ 138,954 $ 124,385 $ 386,928 Per Share Income (Loss) from Continuing Operations - Basic $ 0.53 $ 0.43 $ 1.35 Per Share Income (Loss) from Continuing Operations - Diluted $ 0.53 $ 0.43 $ 1.35 ______________________________________________________________________________ (1) The Pro Forma Financial Information for the year ended December 31, 2016 only reflect the pro forma results of us and Recall. (2) The Pro Forma Financial Information for the years ended December 31, 2017 and 2018 only reflect pro forma results of us and IODC as Recall was included in our actual financial results for the years ended December 31, 2017 and 2018. The amount of revenue and earnings in our Consolidated Statements of Operations for the years ended December 31, 2016, 2017 and 2018 related to Recall and IODC is impracticable for us to determine. Subsequent to the closings of the Recall Transaction and IODC Transaction, we began integrating Recall and IODC and our existing operations in order to achieve operational synergies. As a result, the revenue generated by Recall and IODC, as well as the underlying costs of sales and selling, general and administrative expenses to support Recall's and IODC's businesses, are now integrated with the revenue we generate, as well as the costs of sales and selling, general and administrative expenses that supported our business, prior to the acquisitions of Recall and IODC. In addition to our acquisitions of Recall and IODC, we completed certain other acquisitions during 2016, 2017 and 2018. The Pro Forma Financial Information does not reflect these acquisitions due to the insignificant impact of these acquisitions on our consolidated results of operations. c. Other Noteworthy Acquisitions Acquisitions Completed During the Year Ended December 31, 2016 In March 2016, we acquired a controlling interest in Docufile Holdings Proprietary Limited ("Docufile"), a storage and records management company with operations in South Africa, for approximately $15,000 . The acquisition of Docufile represents our entrance into Africa. In November 2016, we entered into a binding agreement to acquire the storage and information management assets and operations of Santa Fe Group A/S ("Santa Fe") in ten regions within Europe and Asia in order to expand our presence in southeast Asia and western Europe. In December 2016, we acquired the storage and information management assets and operations of Santa Fe in Hong Kong, Malaysia, Singapore, Spain and Taiwan for approximately 15,200 Euros (or approximately $16,000 , based upon the exchange rate between the United States dollar and the Euro as of December 30, 2016, the closing date of the 2016 Santa Fe Transaction). Of the total purchase price, 13,500 Euros (or approximately $14,200 , based upon the exchange rate between the United States dollar and the Euro on the closing date of the 2016 Santa Fe Transaction) was paid during the year ended December 31, 2016, and the remaining balance is due on the 18-month anniversary of the closing of the 2016 Santa Fe Transaction. Acquisitions Completed During the Year Ended December 31, 2017 During the first half of 2017, we acquired, in two separate transactions, (i) the storage and information management assets and operations of Santa Fe in Macau and South Korea, and (ii) the storage and information management assets and operations of Santa Fe in India, Indonesia and the Philippines for an aggregate cash purchase price of approximately 11,700 Euros (or approximately $13,000 , based upon the exchange rate between the United States dollar and the Euro on the closing dates of the respective transactions). In November 2017, we entered into an agreement to acquire the storage and information management assets and operations of Santa Fe in China (the “Santa Fe China Transaction”) for approximately $16,800 , subject to customary purchase price adjustments. On December 29, 2017, we closed on the Santa Fe China Transaction. The purchase price for the Santa Fe China Transaction was not paid until January 2018 and, therefore, we accrued for the purchase price of the Santa Fe China Transaction in our Consolidated Balance Sheet as of December 31, 2017 (the “Accrued Purchase Price”). The Accrued Purchase Price is presented as a component of the current portion of long-term debt in our Consolidated Balance Sheet as of December 31, 2017. In June 2017, in order to expand our presence in Peru, we acquired the storage and information management assets and operations of Ransa Comercial, S.A. and Depositos, S.A., two records and storage and information management companies with operations in Peru, for approximately $14,700 . In July 2017, in order to expand our European operations, we acquired Fileminders Ltd., a storage and records management company with operations in Cyprus, for approximately 24,900 Euros (or approximately $28,500 , based upon the exchange rate between the United States dollar and the Euro on the closing date of the acquisition). In September 2017, in order to expand our data center operations in the United States, we acquired Mag Datacenters LLC, which operated Fortrust, a private data center business with operations in Denver, Colorado (the “Fortrust Transaction”). At the closing of the Fortrust Transaction, we paid approximately $54,500 in cash (the "Fortrust Cash Consideration") and issued 2,193,637 shares of our common stock (the "Fortrust Stock Consideration"). The shares of our common stock issued to the former owners of Fortrust in connection with the Fortrust Transaction contain certain restrictions that impact the marketability of such shares for a period of six months following the closing date of the Fortrust Transaction (the “Lack of Marketability Restriction”). The 2,193,637 shares issued as part of the Fortrust Stock Consideration were valued at approximately $37.84 per share, which reflects a discount related to the Lack of Marketability Restriction, resulting in a total purchase price (including the Fortrust Cash Consideration and the Fortrust Stock Consideration) of approximately $137,500 . In September 2017, in order to expand our existing entertainment storage and services operations in the United States and to expand our entertainment storage and services operations into Canada, the United Kingdom, France, the Netherlands and Hong Kong, we completed the acquisition of Bonded Services of America, Inc. and Bonded Services Acquisition, Ltd. (together, "Bonded") (the "Bonded Transaction"), providers of media asset storage and management services for global entertainment and media companies, for approximately 62,000 British pounds sterling (or approximately $83,000 , based upon the exchange rate between the British pound sterling and the United States dollar on the closing date of the Bonded Transaction). In October 2017, in order to expand our presence in India, we acquired OEC Records Management, a storage and information management company with operations in India for approximately $19,300 . In addition to the transactions noted above, during 2017, in order to enhance our existing operations in the United States, Greece and South Africa and to expand our operations into the United Arab Emirates, we completed the acquisition of five storage and records management companies, one storage and data management company and one art storage company for total consideration of approximately $22,700 . The individual purchase prices of these acquisitions were each less than $5,000 . Acquisitions Completed During the Year Ended December 31, 2018 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. 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. (collectively, "EvoSwitch"), 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. In August 2018, in order to expand our presence in China, we acquired the Chinese-Mainland operations of GRM Document Management, a storage and records management company, for approximately $34,100 . In addition to the transactions noted above, during 2018, in order to enhance our existing operations in the United States, Brazil, India, Ireland, Philippines, South Korea and the United Kingdom and to expand our operations into Croatia, we completed the acquisition of ten storage and records management companies and three art storage companies for total consideration of approximately $64,000 . The individual purchase prices of these acquisitions ranged from approximately $1,000 to $18,000 . 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: 2016 2017 2018 Recall Other Fiscal Year 2016 Acquisitions Total Total IODC Transaction Other Fiscal Year 2018 Acquisitions Total Cash Paid (gross of cash acquired)(1) $ 331,834 $ 37,350 $ 369,184 $ 234,314 $ 1,347,046 $ 432,078 $ 1,779,124 Purchase Price Holdbacks and Other(2) — — — 20,093 — 35,218 35,218 Fair Value of Common Stock Issued 1,835,026 — 1,835,026 83,014 — — — Fair Value of Noncontrolling Interests — 3,506 3,506 1,507 — — — Total Consideration 2,166,860 40,856 2,207,716 338,928 1,347,046 467,296 1,814,342 Fair Value of Identifiable Assets Acquired: Cash 76,461 576 77,037 14,746 34,307 10,227 44,534 Accounts Receivable and Prepaid Expenses 176,775 2,703 179,478 19,309 7,070 13,076 20,146 Fair Value of Recall Divestments(3) 121,689 — 121,689 — — — — Other Assets 57,563 541 58,104 5,070 — 4,586 4,586 Property, Plant and Equipment(4) 622,063 10,963 633,026 150,878 863,027 225,848 1,088,875 Customer Relationship Intangible Assets(5) 709,139 20,842 729,981 116,028 — 44,622 44,622 Data Center In-Place Leases(6) — — — 6,300 104,340 36,130 140,470 Data Center Tenant Relationships(7) — — — — 77,362 18,410 95,772 Data Center Above-Market Leases(8) — — — — 16,439 2,381 18,820 Other Intangible Assets — — — 14,487 — — — Debt Assumed (792,385 ) — (792,385 ) (5,287 ) — (12,312 ) (12,312 ) Accounts Payable, Accrued Expenses and Other Liabilities (276,814 ) (11,504 ) (288,318 ) (24,869 ) (36,230 ) (17,206 ) (53,436 ) Deferred Income Taxes (164,074 ) (2,985 ) (167,059 ) (18,122 ) — (43,218 ) (43,218 ) Data Center Below-Market Leases(8) — — — — (11,421 ) (694 ) (12,115 ) Total Fair Value of Identifiable Net Assets Acquired 530,417 21,136 551,553 278,540 1,054,894 281,850 1,336,744 Goodwill Initially Recorded(9) $ 1,636,443 $ 19,720 $ 1,656,163 $ 60,388 $ 292,152 $ 185,446 $ 477,598 _______________________________________________________________________________ (1) Included in cash paid for acquisitions in the Consolidated Statement of Cash Flows for the year ended December 31, 2016 is net cash acquired of $77,037 and cash received of $182 related to acquisitions made in years prior to 2016. Included in cash paid for acquisitions in the Consolidated Statement of Cash Flows for the year ended December 31, 2017 is net cash acquired of $14,746 and contingent and other payments, net of $137 related to acquisitions made in years prior to 2017. Included in cash paid for acquisitions in the Consolidated Statement of Cash Flows for the year ended December 31, 2018 is net cash acquired of $44,534 and contingent and other payments, net of $23,967 related to acquisitions made in years prior to 2018. (2) Purchase price holdbacks and other includes $16,771 purchase price accrued for the Santa Fe China Transaction in 2017 and includes $18,824 purchase price accrued for the EvoSwitch Transaction in 2018. (3) Represents the fair value, less costs to sell, of the Initial United States Divestments, the Seattle/Atlanta Divestments, the Recall Canadian Divestments and the UK Divestments. (4) Consists primarily of buildings, building improvements, leasehold improvements, data center infrastructure, racking structures, warehouse equipment and computer hardware and software. (5) The weighted average lives of customer relationship intangible assets associated with acquisitions in 2016 , 2017 and 2018 was 13 years, 12 years and 10 years, respectively. (6) The weighted average lives of data center in-place leases associated with acquisitions in 2018 was 6 years. (7) The weighted average lives of data center tenant relationships associated with acquisitions in 2018 was 9 years. (8) The weighted average lives of data center above-market leases associated with acquisitions in 2018 was 3 years and the weighted average lives of data center below-market leases associated with acquisitions in 2018 was 7 years. (9) The goodwill associated with acquisitions, including Recall and 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 us and the acquired businesses. Allocations of the purchase price for acquisitions made in 2016, 2017 and 2018 were 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. Assets and liabilities that were acquired and classified as held for sale immediately following the Recall Transaction were valued based on the estimated fair value of the divestment, less costs to sell. The preliminary purchase price allocations that are not finalized as of December 31, 2018 primarily relate to the final assessment of the fair values of intangible assets (primarily customer relationship intangible assets and data center lease-based intangible assets), property, plant and equipment (primarily building, building improvements, data center infrastructure and racking structures), operating leases, contingencies and income taxes (primarily deferred income taxes), primarily associated with the EvoSwitch Transaction, as well as other acquisitions we closed in 2018. 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 2018 were not material to our results from operations.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
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 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 following the date on which that asset was first owned by a REIT that are attributable to "built-in" gains with respect to that asset on that date. This built-in gains tax has been imposed on our depreciation recapture recognized into income as a result of accounting method changes commenced in our pre-REIT period and in connection with the Recall Transaction and IODC Transaction. 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. On December 22, 2017, legislation commonly referred to as the Tax Cuts and Jobs Act (the “Tax Reform Legislation”) was enacted into law in the United States. The Tax Reform Legislation amended the Internal Revenue Code of 1986, as amended (the “Code”), to reduce tax rates and modify policies, credits and deductions for businesses and individuals. The following summarizes certain components of the Tax Reform Legislation and the impact such components of the Tax Reform Legislation. One of the primary components of the Tax Reform Legislation was a reduction in the United States corporate federal income tax rate from 35% to 21% for taxable years beginning after December 31, 2017. a. Deemed Repatriation Transition Tax The Tax Reform Legislation imposed a transition tax (the “Deemed Repatriation Transition Tax”) on a mandatory deemed repatriation of post-1986 undistributed foreign earnings and profits not previously subject to United States tax as of November 2, 2017 or December 31, 2017, whichever is greater (the “Undistributed E&P”) as of the last taxable year beginning before January 1, 2018. The Deemed Repatriation Transition Tax varied depending on whether the Undistributed E&P is held in liquid (as defined in the Tax Reform Legislation) or non-liquid assets. A participation deduction against the deemed repatriation would result in a Deemed Repatriation Transition Tax on Undistributed E&P of 15.5% if held in cash and liquid assets and 8% if held in non-liquid assets. The Deemed Repatriation Transition Tax applies regardless of whether or not an entity has cash in its foreign subsidiaries and regardless of whether the entity actually repatriates the Undistributed E&P back to the United States. We have completed our analysis and determined that the amount of Undistributed E&P deemed repatriated under the Tax Reform Legislation in our taxable year ending December 31, 2017 was $160,000 (the “Undistributed E&P”). We opted to include the full amount of Undistributed E&P in our 2017 taxable income, rather than spread it over eight years (as permitted by the Tax Reform Legislation). After applying the participation deduction, included in our REIT taxable income for 2017 was approximately $70,900 related to the deemed repatriation of Undistributed E&P. b. Global Intangible Low-Taxed Income For taxable years beginning after December 31, 2017, the Tax Reform Legislation introduced new provisions intended to prevent the erosion of the United States federal income tax base through the taxation of certain global intangible low-taxed income (“GILTI”). The GILTI provisions created a new requirement that certain income earned by controlled foreign corporations (“CFCs”) must be included currently in the gross income of the CFC’s United States tax resident shareholder. Generally, GILTI is the excess of the United States shareholder’s pro rata portion of the income of its foreign subsidiaries over the net deemed tangible income return of such subsidiaries. The GILTI provisions also provide for certain deductions against the inclusion of GILTI in taxable income; however, REITs are not eligible for such deductions. Therefore, 100% of our GILTI is included in our taxable income and will increase the required minimum distribution to our stockholders. We estimate the amount of the GILTI in our taxable income for the year ending December 31, 2018 to be approximately $20,791 . We have adopted a policy such that we will recognize no deferred taxes related to basis differences resulting from GILTI. c. Interest Deduction Limitation The Tax Reform Legislation also limits, for certain entities, the deduction for net interest expense to the sum of business interest income plus 30% of adjusted taxable income (the “Interest Deduction Limitation”). Adjusted taxable income is defined in the Tax Reform Legislation similar to earnings before interest, taxes, depreciation and amortization for taxable years beginning after December 31, 2017 and before January 1, 2022, and is defined similar to earnings before interest and taxes for taxable years beginning after December 31, 2021. The Interest Deduction Limitation does not apply to taxpayers that qualify, and make an election, to be treated as an “electing real property trade or business”. As a REIT, IMI, including all of our QRSs, expects to make an election to be treated as an "electing real property trade or business" beginning in our taxable year ended December 31, 2018. As such, the interest deduction limitation will not apply to IMI or our QRSs; however, IMI will be required to utilize the alternative depreciation system for its real property. This election will not have a material impact on our consolidated financial statements. We do not generally believe our TRSs are eligible for treatment as "electing real property trades or businesses". The significant components of our deferred tax assets and deferred tax liabilities are presented below: December 31, 2017 2018 Deferred Tax Assets: Accrued liabilities and other adjustments $ 38,931 $ 54,506 Net operating loss carryforwards 105,026 92,952 Federal benefit of unrecognized tax benefits 3,051 2,925 Valuation allowance (61,756 ) (55,666 ) 85,252 94,717 Deferred Tax Liabilities: Other assets, principally due to differences in amortization (168,028 ) (166,469 ) Plant and equipment, principally due to differences in depreciation (61,530 ) (74,147 ) Other(1) — (26,260 ) (229,558 ) (266,876 ) Net deferred tax liability $ (144,306 ) $ (172,159 ) ______________________________________________________________________________ (1) Other consists primarily of withholding taxes on the earnings of foreign qualified REIT subsidiaries, capital lease obligations and an accounting method change for certain tangible assets acquired as part of the IODC Transaction. At December 31, 2017, the comparable amount of approximately $12,800 was presented as a reduction to accrued liabilities and other adjustments in the table above. The deferred tax assets and liabilities are presented below: December 31, 2017 2018 Noncurrent deferred tax assets (Included in Other, a component of Other Assets, net) $ 11,422 $ 11,677 Noncurrent deferred tax liabilities (155,728 ) (183,836 ) At December 31, 2018, we have federal net operating loss carryforwards of $163,022 available to reduce future federal taxable income, the majority of which expire from 2023 through 2037. Of the $163,022 , we expect to utilize $49,436 and realize a federal tax benefit of $10,382 . A majority of the net operating loss carryforwards and federal tax benefit expected to be realized were generated by the IODC Transaction. We can carry forward these net operating losses to the extent we do not utilize them in any given available year. We have state net operating loss carryforwards, which expire from 2019 through 2038, of which an insignificant state tax benefit is expected to be realized. We have assets for foreign net operating losses of $82,485 , with various expiration dates (and in some cases no expiration date), subject to a valuation allowance of approximately 67% . Rollforward of the valuation allowance is as follows: Year Ended December 31, Balance at Beginning of the Year Charged (Credited) to Expense Other Increases/(Decreases)(1) Balance at End of the Year 2016 $ 60,009 $ 7,660 $ 3,690 $ 71,359 2017 71,359 (4,317 ) (5,286 ) 61,756 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 and disposal of certain foreign subsidiaries. The components of income (loss) from continuing operations before provision (benefit) for income taxes and gain on sale of real estate are: Year Ended December 31, 2016 2017 2018 United States $ 106,223 $ 161,198 $ 201,730 Canada 28,157 50,019 53,779 Other Foreign 12,264 4,888 102,402 $ 146,644 $ 216,105 $ 357,911 The provision (benefit) for income taxes consists of the following components: Year Ended December 31, 2016 2017 2018 Federal—current $ 52,944 $ 16,345 $ 703 Federal—deferred (28,127 ) (12,655 ) (4,675 ) State—current 6,096 3,440 918 State—deferred (1,479 ) (1,276 ) 627 Foreign—current 36,272 42,532 45,371 Foreign—deferred (20,762 ) (22,439 ) (6,681 ) $ 44,944 $ 25,947 $ 36,263 A reconciliation of total income tax expense and the amount computed by applying the former federal statutory tax rate of 35.0% to income from continuing operations before provision (benefit) for income taxes and gain on sale of real estate for the years ended December 31, 2016 and 2017 and the current federal statutory tax rate of 21.0% to income from continuing operations before provision (benefit) for income taxes and gain on sale of real estate for the year ended December 31, 2018 is as follows: Year Ended December 31, 2016 2017 2018 Computed "expected" tax provision $ 51,325 $ 75,637 $ 75,161 Changes in income taxes resulting from: Tax adjustment relating to REIT (18,526 ) (78,873 ) (35,165 ) Deferred tax adjustment and other taxes due to REIT conversion 247 — — State taxes (net of federal tax benefit) 3,796 2,692 1,599 Increase (decrease) in valuation allowance (net operating losses) 7,660 (4,317 ) 3,568 Foreign repatriation 510 29,476 — U.S. Federal Rate Reduction — (4,685 ) — Reserve (reversal) accrual and audit settlements (net of federal tax benefit) 1,898 (9,103 ) (13,985 ) Foreign tax rate differential (13,328 ) (11,949 ) 5,545 Disallowed foreign interest, Subpart F income, and other foreign taxes 7,773 29,325 903 Other, net 3,589 (2,256 ) (1,363 ) Provision (Benefit) for Income Taxes $ 44,944 $ 25,947 $ 36,263 Our effective tax rates for the years ended December 31, 2016 , 2017 and 2018 were 30.6% , 12.0% and 10.1% , 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 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 former federal statutory tax rate of 35.0% and our overall effective tax rate for the year ended December 31, 2016 were the benefit derived from the dividends paid deduction of $18,526 and the impact of differences in the tax rates at which our foreign earnings are subject resulting in a tax benefit of $13,328 , partially offset by valuation allowances on certain of our foreign net operating losses of $7,660 . The primary reconciling items between the former federal statutory tax rate of 35.0% and our overall effective tax rate for the year ended December 31, 2017 were the benefit derived from the dividends paid deduction of $78,873 , the impact of differences in the tax rates at which our foreign earnings are subject resulting in a tax benefit of $11,949 , and a release of valuation allowances on certain of our foreign net operating losses of $4,317 as a result of the merger of certain of our foreign subsidiaries, partially offset by the impact of the Tax Reform Legislation of $24,791 (reflecting the impact of the Deemed Repatriation Transition Tax, partially offset by the impact of the U.S. Federal Rate Reduction). The primary reconciling items between the current federal statutory tax rate of 21.0% and our overall effective tax rate for the year ended December 31, 2018 were 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 $5,545 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. 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. During 2016, as a result of the closing of the Recall Transaction and the subsequent integration of Recall’s operations into our operations, we reassessed our intentions regarding the indefinite reinvestment of such undistributed earnings of our foreign subsidiaries outside the United States (the “2016 Indefinite Reinvestment Assessment”). As a result of the 2016 Indefinite Reinvestment Assessment, 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 and, therefore, during 2016, we recognized a decrease in our provision for income taxes from continuing operations in the amount of $3,260 , representing the reversal of previously recognized incremental foreign withholding taxes on the earnings of such unconverted foreign TRSs. As a result of the 2016 Indefinite Reinvestment Assessment, we no longer provide incremental foreign withholding taxes on the retained book earnings of these unconverted foreign TRSs, which was approximately $249,200 as of December 31, 2018. 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 qualified REIT subsidiaries 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 an increase of $1,805 , $289 and $1,961 for gross interest and penalties for the years ended December 31, 2016 , 2017 and 2018 , respectively. We had $7,061 and $7,557 accrued for the payment of interest and penalties as of December 31, 2017 and 2018 , 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 2012 to present Canada 2015 to present United Kingdom 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 2015, 2016 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 2001 through 2002 and 2009 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, 2017, we had $38,533 of reserves related to uncertain tax positions, of which $34,003 and $4,530 is included in other long-term liabilities and deferred income taxes, respectively, in the accompanying Consolidated Balance Sheet. As of December 31, 2018, we had $35,320 of reserves related to uncertain tax positions, of which $32,144 and $3,176 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. A rollforward of unrecognized tax benefits is as follows: Gross tax contingencies—December 31, 2015 $ 47,685 Gross additions based on tax positions related to the current year 3,704 Gross additions for tax positions of prior years 12,207 Gross reductions for tax positions of prior years (1,740 ) Lapses of statutes (2,390 ) Settlements — Gross tax contingencies—December 31, 2016 $ 59,466 Gross additions based on tax positions related to the current year 4,067 Gross additions for tax positions of prior years 3,368 Gross reductions for tax positions of prior years(1) (2,789 ) Lapses of statutes (2,629 ) Settlements (22,950 ) 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 _______________________________________________________________________________ (1) This amount includes gross additions related to the Recall Transaction. The reversal of these reserves of $35,320 ( $32,677 net of federal tax benefit) as of December 31, 2018 will be recorded as a reduction of our income tax provision, if sustained. We believe that it is reasonably possible that an amount up to approximately $7,767 ( $5,119 net of federal tax benefit) of our unrecognized tax positions may be recognized by the end of 2019 as a result of a lapse of statute of limitations or upon closing and settling significant audits in various worldwide jurisdictions.

Quarterly Results of Operations

Quarterly Results of Operations (Unaudited)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Quarterly Results of Operations (Unaudited)	Quarter Ended March 31 June 30 September 30 December 31 2017 Total revenues $ 938,876 $ 949,806 $ 965,661 $ 991,235 Operating income (loss) 147,755 170,194 176,756 154,405 Income (loss) from continuing operations 58,844 83,148 25,382 24,349 Total (loss) income from discontinued operations (337 ) (2,026 ) (1,058 ) (2,870 ) Net income (loss) 58,507 81,122 24,324 21,479 Net income (loss) attributable to Iron Mountain Incorporated 58,125 78,630 24,345 22,721 (1) Earnings (losses) per Share-Basic: Income (loss) per share from continuing operations 0.22 0.31 0.10 0.09 Total (loss) income per share from discontinued operations — (0.01 ) — (0.01 ) Net income (loss) per share attributable to Iron Mountain Incorporated 0.22 0.30 0.09 0.08 Earnings (losses) per Share-Diluted: Income (loss) per share from continuing operations 0.22 0.30 0.10 0.09 Total (loss) income per share from discontinued operations — (0.01 ) — (0.01 ) Net income (loss) per share attributable to Iron Mountain Incorporated 0.22 0.30 0.09 0.08 2018 Total revenues $ 1,042,458 $ 1,060,823 $ 1,060,991 $ 1,061,489 Operating income (loss) 164,559 203,359 195,746 191,844 Income (loss) from continuing operations 45,614 93,903 78,628 158,831 Total (loss) income from discontinued operations (462 ) (360 ) (11,605 ) — Net income (loss) 45,152 93,543 67,023 158,831 Net income (loss) attributable to Iron Mountain Incorporated 44,684 93,401 67,148 158,118 (2) Earnings (losses) per Share-Basic: Income (loss) per share from continuing operations 0.16 0.33 0.28 0.55 Total (loss) income per share from discontinued operations — — (0.04 ) — Net income (loss) per share attributable to Iron Mountain Incorporated 0.16 0.33 0.23 0.55 Earnings (losses) per Share-Diluted: Income (loss) per share from continuing operations 0.16 0.33 0.27 0.55 Total (loss) income per share from discontinued operations — — (0.04 ) — Net income (loss) per share attributable to Iron Mountain Incorporated 0.16 0.33 0.23 0.55 _______________________________________________________________________________ (1) The change in net income (loss) attributable to Iron Mountain Incorporated in the fourth quarter of 2017 compared to the third quarter of 2017 is primarily attributable to increases in operating expenses, primarily associated with increased Significant Acquisition Costs and bad debt expenses, as well as a $3,011 intangible impairment charge recorded during the fourth quarter of 2017. This increase in operating expenses was partially offset by a decrease in debt extinguishment expense in the fourth quarter of 2017 compared to the third quarter of 2017 of approximately $18,200 , as well as a decrease in the provision for income taxes recorded in the fourth quarter of 2017 compared to the third quarter of 2017 of approximately $5,800 . The decrease in the tax provision is primarily attributable to benefits derived from (i) rate changes as a result of the Tax Reform Legislation, (ii) the release of reserves and benefits recorded as a result of closing tax years; and (iii) the change in our estimated annual effective tax rate, which were partially offset by a provision related to the establishment of a valuation allowance on certain of our foreign net operating losses in Brazil. (2) The change in net income (loss) attributable to Iron Mountain Incorporated in the fourth quarter of 2018 compared to the third quarter of 2018 is primarily attributable to (i) gains of approximately $54,500 recorded during the fourth quarter of 2018 associated with the sale of land and buildings in the United Kingdom (see Note 2.g.), (ii) a gain on disposal/write-down of property, plant and equipment (excluding real estate) recorded during the fourth quarter of 2018 of approximately $8,800 related to the receipt of insurance proceeds related to the involuntary conversion of certain assets in a facility we own in Argentina (see Note 2.g.), (iii) a decrease in the provision for income taxes recorded in the fourth quarter of 2018 compared to the third quarter of 2018 of approximately $19,900 , (iv) an increase in gains on foreign currency transactions in the fourth quarter of 2018 compared to the third quarter of 2018 of approximately $20,000 and (v) a charge of $11,100 recorded during the third quarter of 2018 relating to the resolution of the post-closing adjustments to the Access Contingent Consideration that did not recur during the fourth quarter of 2018.

Segment Information

Segment Information	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Segment Information	During the fourth quarter of 2018, as a result of changes in the management of our Information Governance and Digital Solutions business in Sweden, we reassessed the composition of our reportable operating segments. As a result of this reassessment, we determined that this business is now being managed as a component of our Other International Business segment rather than as a component of our Western European Business segment. As result of this change, previously reported segment information has been restated to conform to the current presentation. The remainder of our business in Sweden, excluding the Information Governance and Digital Solutions, has previously been managed and reported as a component of our Other International Business segment. As of December 31, 2018, our six reportable operating segments are described as follows: • North American Records and Information Management Business—provides (i) records and information management storage and related services, including the storage of physical records, including media such as microfilm and microfiche, film, X-rays and blueprints, including healthcare information services, vital records services, service and courier operations, and the collection, handling and disposal of sensitive documents for customers (“Records Management”), throughout the United States and Canada; (ii) certain services related to Records Management, including secure shredding operations, which typically include the scheduled pick-up of loose office records that customers accumulate in specially designed secure containers we provide; and (iii) Information Governance and 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, document conversion and digital storage in the United States and Canada. • North American Data Management Business—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 including our Iron Mountain Iron Cloud solution. • Western European Business—provides records and information management services, including Records Management, Data Protection & Recovery and Information Governance and Digital Solutions, throughout Austria, Belgium, France, Germany, Ireland, the Netherlands, Spain, Switzerland and the United Kingdom (consisting of our operations in England, Northern Ireland and Scotland). • Other International Business—provides records and information management services throughout the remaining European countries in which we operate, as well as the countries in which we operate in Latin America, Asia, the Middle East and Africa, including Records Management, Data Protection & Recovery and Information Governance and Digital Solutions. Our European operations included in this segment provide records and information management services, including Records Management, Data Protection & Recovery and Information Governance and Digital Solutions, throughout Croatia, Cyprus, the Czech Republic, Denmark, Finland, Greece, Hungary, Norway, Poland, Romania, Serbia, Slovakia and Turkey and Records Management and Information Governance and Digital Solutions in Estonia, Latvia, Lithuania and Sweden. Our Latin America operations provide records and information management services, including Records Management, Data Protection & Recovery, destruction services and Information Governance and Digital Solutions, throughout Argentina, Brazil, Chile, Colombia, Mexico and Peru. Our Asia operations provide records and information management services, including Records Management, Data Protection & Recovery, destruction services and Information Governance and Digital Solutions, throughout Australia and New Zealand, with Records Management and Data Protection & Recovery also provided in certain markets in China-Mainland, China -Taiwan, China-Macau S.A.R., China-Hong Kong S.A.R., India, Indonesia, Malaysia, the Philippines, Singapore, South Korea, Thailand and the United Arab Emirates. Our African operations provide Records Management, Data Protection & Recovery, and Information Governance and Digital Solutions in South Africa. • Global Data Center Business—provides enterprise-class data center facilities to protect mission-critical assets and ensure the continued operation of our customers’ IT infrastructure, with secure and reliable colocation and wholesale options. As of December 31, 2018, we had data center operations in eight markets in the United States: Denver, Colorado; Kansas City, Missouri; Boston, Massachusetts; Boyers, Pennsylvania; Manassas, Virginia; Edison, New Jersey; Columbus, Ohio; and Phoenix and Scottsdale, Arizona and three international markets: Amsterdam, London, and Singapore. • Corporate and Other Business—primarily consists of the storage, safeguarding and electronic or physical delivery of physical media of all types and digital content repository systems to house, distribute, and archive key media assets, primarily for entertainment and media industry clients ("Entertainment Services"), throughout the United States, Canada, France, China-Hong Kong S.A.R., the Netherlands and the United Kingdom, and our fine art storage businesses and consumer storage businesses in the United States, Canada, Europe and China - Hong Kong S.A.R. These businesses represent the primary product offerings of our Adjacent Businesses operating segment. Additionally, our Corporate and Other Business segment includes costs related to executive and staff functions, including finance, human resources and IT, which benefit the enterprise as a whole. These costs are primarily related to the general management of these functions on a corporate level and the design and development of programs, policies and procedures that are then implemented in the individual segments, with each segment bearing its own cost of implementation. Our Corporate and Other Business segment also includes stock-based employee compensation expense associated with all Employee Stock-Based Awards. An analysis of our business segment information and reconciliation to the accompanying Consolidated Financial Statements is as follows: North North Western European Business Other International Business Global Data Center Business Corporate and Total As of and for the Year Ended December 31, 2016 Total Revenues $ 1,930,699 $ 392,814 $ 447,357 $ 659,370 $ 24,249 $ 56,964 $ 3,511,453 Storage Rental 1,150,646 264,148 275,659 393,005 22,026 37,421 2,142,905 Service 780,053 128,666 171,698 266,365 2,223 19,543 1,368,548 Depreciation and Amortization 215,330 26,629 55,427 100,645 4,827 49,468 452,326 Depreciation 186,467 20,666 42,458 67,465 4,610 43,860 365,526 Amortization 28,863 5,963 12,969 33,180 217 5,608 86,800 Adjusted EBITDA 775,717 224,522 136,985 169,563 6,212 (225,711 ) 1,087,288 Total Assets(1) 4,996,216 826,320 1,020,439 2,114,599 167,757 361,469 9,486,800 Expenditures for Segment Assets 145,636 26,054 31,251 365,845 70,060 32,488 671,334 Capital Expenditures 111,062 22,731 30,735 62,594 70,060 31,421 328,603 Cash Paid for Acquisitions, Net of Cash Acquired(2) (2,591 ) (59 ) (6,878 ) 300,451 — 1,042 291,965 Acquisitions of Customer Relationships and Customer Inducements 37,165 3,382 7,394 2,800 — 25 50,766 As of and for the Year Ended December 31, 2017 Total Revenues 2,050,346 401,640 490,746 795,851 37,694 69,301 3,845,578 Storage Rental 1,221,495 276,416 303,205 493,118 35,839 47,484 2,377,557 Service 828,851 125,224 187,541 302,733 1,855 21,817 1,468,021 Depreciation and Amortization 240,524 34,759 64,051 119,402 10,224 53,416 522,376 Depreciation 201,204 24,623 47,526 78,664 8,617 45,649 406,283 Amortization 39,320 10,136 16,525 40,738 1,607 7,767 116,093 Adjusted EBITDA 884,158 223,324 159,142 227,312 11,275 (245,015 ) 1,260,196 Total Assets(1) 5,050,240 839,539 911,012 2,401,579 382,198 1,387,834 10,972,402 Expenditures for Segment Assets 205,531 31,279 21,853 166,057 86,543 126,758 638,021 Capital Expenditures 134,785 31,279 19,782 76,720 32,015 48,550 343,131 Cash Paid for Acquisitions, Net of Cash Acquired 6,624 — — 80,345 54,528 78,208 219,705 Acquisitions of Customer Relationships and Customer Inducements 64,122 — 2,071 8,992 — — 75,185 North American Records and Information Management Business North American Data Management Business Western European Business Other International Business Global Data Center Business Corporate and Other Business Total Consolidated As of and for the Year Ended December 31, 2018 Total Revenues $ 2,137,781 $ 393,993 $ 521,555 $ 821,333 $ 228,983 $ 122,116 $ 4,225,761 Storage Rental 1,222,230 273,193 325,624 512,358 218,675 70,375 2,622,455 Service 915,551 120,800 195,931 308,975 10,308 51,741 1,603,306 Depreciation and Amortization 243,415 38,850 64,795 125,154 105,680 61,620 639,514 Depreciation 190,493 30,066 45,590 75,294 58,707 52,590 452,740 Amortization 52,922 8,784 19,205 49,860 46,973 9,030 186,774 Adjusted EBITDA 956,890 213,893 180,172 243,008 99,574 (257,668 ) 1,435,869 Total Assets(1) 4,933,269 807,564 1,179,065 2,262,672 2,217,505 452,172 11,852,247 Expenditures for Segment Assets 196,010 19,325 63,142 165,167 1,794,386 79,276 2,317,306 Capital Expenditures 115,555 19,325 39,163 80,275 152,739 53,005 460,062 Cash Paid for Acquisitions, Net of Cash Acquired 1,551 — 14,579 77,087 1,639,427 25,913 1,758,557 Acquisitions of Customer Relationships, Customer Inducements and Contract Fulfillment Costs 78,904 — 9,400 7,805 2,220 358 98,687 _______________________________________________________________________________ (1) Excludes all intercompany receivables or payables and investment in subsidiary balances. (2) Cash paid for acquisitions, net of cash acquired for the Other International Business segment for the year ended December 31, 2016 primarily consists of the cash component of the purchase price for the Recall Transaction, as the IMI entity that made the cash payment was an Australian subsidiary. However, the Recall Transaction also benefited the North American Records and Information Management Business, North American Data Management Business and Western European Business segments. The accounting policies of the reportable segments are the same as those described in Note 2. Adjusted EBITDA for each segment is defined as income (loss) from continuing operations before interest expense, net, provision (benefit) for income taxes, depreciation and amortization, and also excludes certain items that we believe are not indicative of our core operating results, specifically: (1) loss (gain) on disposal/write-down of property, plant and equipment (excluding real estate), net; (2) intangible impairments; (3) other expense (income), net; (4) gain on sale of real estate, net of tax; and (5) Significant Acquisition 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 Adjusted EBITDA to income (loss) from continuing operations on a consolidated basis is as follows: Year Ended December 31, 2016 2017 2018 Adjusted EBITDA $ 1,087,288 $ 1,260,196 $ 1,435,869 (Add)/Deduct: Gain on Sale of Real Estate, Net of Tax (2,180 ) (1,565 ) (55,328 ) Provision (Benefit) for Income Taxes 44,944 25,947 36,263 Other Expense, Net 44,300 79,429 (11,692 ) Interest Expense, Net 310,662 353,575 409,289 Loss (Gain) on Disposal/Write-down of Property, Plant and Equipment (Excluding Real Estate), Net 1,412 799 (9,818 ) Depreciation and Amortization 452,326 522,376 639,514 Intangible Impairments — 3,011 — Significant Acquisition Costs(1) 131,944 84,901 50,665 Income (Loss) from Continuing Operations $ 103,880 $ 191,723 $ 376,976 _______________________________________________________________________________ (1) Represents operating expenditures associated with (1) the Recall Transaction, including: (i) advisory and professional fees to complete the Recall Transaction; (ii) costs associated with the Divestments required in connection with receipt of regulatory approvals (including transitional services); and (iii) costs to integrate Recall with our existing operations, including moving, severance, facility upgrade, REIT integration and system upgrade costs, as well as certain costs associated with our shared service center initiative for our finance, human resources and information technology functions; and (2) the advisory and professional fees to complete the IODC Transaction (collectively, "Significant Acquisition Costs"). Information as to our operations in different geographical areas is as follows: Year Ended December 31, 2016 2017 2018 Revenues: United States $ 2,173,782 $ 2,310,296 $ 2,579,847 United Kingdom 237,032 246,373 280,993 Canada 230,944 243,625 249,505 Australia 148,175 157,333 155,367 Other International 721,520 887,951 960,049 Total Revenues $ 3,511,453 $ 3,845,578 $ 4,225,761 Long-lived Assets: United States $ 5,238,807 $ 5,476,551 $ 6,902,232 United Kingdom 400,937 529,233 547,768 Canada 463,396 500,396 453,398 Australia 542,055 470,432 442,755 Other International 1,729,498 2,045,475 2,297,980 Total Long-lived Assets $ 8,374,693 $ 9,022,087 $ 10,644,133 Information as to our revenues by product and service lines by segment are as follows: North American Records and Information Management Business North American Data Management Business Western European Business Other International Business Global Data Center Business Corporate and Other Business Total Consolidated For the Year Ended December 31, 2016 Records Management(1) $ 1,629,367 $ 14,857 $ 373,994 $ 578,209 $ — $ 35,468 $ 2,631,895 Data Management(1) — 370,419 73,182 59,989 — 21,496 525,086 Information Destruction(1)(2) 301,332 7,538 181 21,172 — — 330,223 Data Center — — — — 24,249 — 24,249 Total Revenues 1,930,699 392,814 447,357 659,370 24,249 56,964 3,511,453 For the Year Ended December 31, 2017 Records Management(1) 1,706,288 — 417,221 686,988 — 37,194 2,847,691 Data Management(1) — 391,346 73,389 77,413 — 32,103 574,251 Information Destruction(1)(2) 344,058 10,294 136 31,450 — 4 385,942 Data Center — — — — 37,694 — 37,694 Total Revenues 2,050,346 401,640 490,746 795,851 37,694 69,301 3,845,578 For the Year Ended December 31, 2018 Records Management(1) 1,751,058 — 443,960 708,297 — 64,607 2,967,922 Data Management(1) — 384,370 77,189 77,476 — 57,509 596,544 Information Destruction(1)(2) 386,723 9,623 406 35,560 — — 432,312 Data Center — — — — 228,983 — 228,983 Total Revenues 2,137,781 393,993 521,555 821,333 228,983 122,116 4,225,761 _______________________________________________________________________________ (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.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	a. Leases Most of our leased facilities are leased under various operating leases that typically have initial lease terms of five to ten years. A majority of these leases have renewal options with one or more five -year options to extend and may have fixed or Consumer Price Index escalation clauses. We also lease vehicles and certain office equipment which have remaining lease lives ranging from one to seven years. Total rent expense under all of our operating leases was $321,337 , $350,403 and $365,762 for the years ended December 31, 2016 , 2017 and 2018 , respectively. Estimated minimum future lease payments (excluding common area maintenance charges) include payments for certain renewal periods at our option because failure to renew results in an economic disincentive due to significant capital expenditure costs (e.g., racking structures), thereby making it reasonably assured that we will renew the lease. Such payments in effect at December 31, are as follows: Year Operating Lease Payments Sublease Income Capital Leases 2019 $ 323,454 $ (7,525 ) $ 80,513 2020 293,276 (7,200 ) 71,335 2021 267,379 (7,063 ) 61,269 2022 246,128 (6,694 ) 52,832 2023 221,808 (6,409 ) 44,722 Thereafter 1,287,807 (6,279 ) 377,750 Total minimum lease payments $ 2,639,852 $ (41,170 ) 688,421 Less amounts representing interest (241,248 ) Present value of capital lease obligations $ 447,173 In addition, we have certain contractual obligations related to purchase commitments which require minimum payments as follows: Year Purchase 2019 $ 232,880 2020 48,436 2021 40,112 2022 20,042 2023 2,196 Thereafter 1,876 $ 345,542 ______________________________________________________________________________ (1) Purchase commitments include obligations for future construction costs associated with the expansion of our data center business which represent a substantial portion of the amount of purchase commitments due in 2019. 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, 2017 and 2018 there were $38,460 and $41,328 , 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 ultimate claim costs based on claims incurred as of the balance sheet date. c. Litigation—General We are involved in litigation from time to time in the ordinary course of business. 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. The matters described below represent our significant loss contingencies. We have evaluated each matter and, if both probable and estimable, accrued an amount that represents our estimate of any probable loss associated with such matter. In addition, we have estimated a reasonably possible range for all loss contingencies including those described below. We believe it is reasonably possible that we could incur aggregate losses in addition to amounts currently accrued for all matters up to an additional $16,800 over the next several years, of which certain amounts would be covered by insurance or indemnity arrangements. d. Italy Fire On November 4, 2011, we experienced a fire at a facility we leased in Aprilia, Italy. The facility primarily stored archival and inactive business records for local area businesses. Despite quick response by local fire authorities, damage to the building was extensive, and the building and its contents were a total loss. We have been sued by six customers. Four of those lawsuits have been settled and two remain pending, including a claim asserted by Azienda per i Transporti Autoferrotranviari del Comune di Roma, S.p.A, seeking 42,600 Euros for the loss of its current and historical archives. We have also received correspondence from other affected customers, including certain customers demanding payment under various theories of liability. Although our warehouse legal liability insurer has reserved its rights to contest coverage related to certain types of potential claims, we believe we carry adequate insurance. We deny any liability with respect to the fire and we have referred these claims to our warehouse legal liability insurer for an appropriate response. We do not expect that this event will have a material impact on our consolidated financial condition, results of operations or cash flows. We sold our Italian operations on April 27, 2012, and we indemnified the buyers related to certain obligations and contingencies associated with this fire. As a result of the sale of the Italian operations, any future statement of operations and cash flow impacts related to the fire will be reflected as discontinued operations. e. Argentina Fire On February 5, 2014, we experienced a fire at a facility we own in Buenos Aires, Argentina. As a result of the quick response by local fire authorities, the fire was contained before the entire facility was destroyed and all employees were safely evacuated; however, a number of first responders lost their lives, or in some cases, were severely injured. The cause of the fire is currently being investigated. We believe we carry adequate insurance and do not expect that this event will have a material impact to our consolidated financial condition, results of operations or cash flows. Revenues from our operations at this facility represent less than 0.5% of our consolidated revenues. In December 2018, we received insurance proceeds of approximately $13,700 related to the involuntary conversion of assets included in the facility and, as a result, we recorded a gain on disposal/write-down of property, plant and equipment (excluding real estate), net of $8,814 during the fourth quarter of 2018. f. Brooklyn Fire (Recall) On January 31, 2015, a former Recall leased facility located in Brooklyn, New York was completely destroyed by a fire. Approximately 900,000 cartons of customer records were lost impacting approximately 1,200 customers. No one was injured as a result of the fire. We believe we carry adequate insurance to cover any losses resulting from the fire. There is one pending customer-related lawsuit stemming from the fire, which is being defended by our warehouse legal liability insurer. We have also received correspondence from other customers, under various theories of liability. We deny any liability with respect to the fire and we have referred these claims to our insurer for an appropriate response. We do not expect that this event will have a material impact on our consolidated financial condition, results of operations or cash flows. g. Roye Fire (Recall) On January 28, 2002, a former leased Recall records management facility located in Roye, France was destroyed by a fire. Local French authorities conducted an investigation relating to the fire and issued a charge of criminal negligence for non-compliance with security regulations against the Recall entity that leased the facility. We intend to defend this matter vigorously. We are currently corresponding with various customers impacted by the fire who are seeking payment under various theories of liability. There is also pending civil litigation with the owner of the destroyed facility, who is demanding payment for lost rental income and other items. Based on known and expected claims and our expectation of the ultimate outcome of those claims, we believe we carry adequate insurance coverage. We do not expect that this event will have a material impact on our consolidated financial condition, results of operations or cash flows. h. Puerto Rico Facility Damage In September 2017, two of our four facilities in Puerto Rico, one owned and one leased, sustained damage as a result of Hurricane Maria. The leased facility experienced structural damage to a portion of the roof and wall, while the owned facility sustained non-structural damage to a portion of the roof. Both buildings sustained water damage that impacted certain customer records. We believe we carry adequate insurance coverage for this event and do not believe it will have a material impact to our consolidated financial condition, results of operations or cash flows. Revenues from our operations in Puerto Rico represent less than 0.5% of our consolidated revenues. _______________________________________________________________________________ Our policy related to business interruption insurance recoveries is to record gains within Other expense (income), net in our Consolidated Statements of Operations and proceeds received within cash flows from operating activities in our Consolidated Statements of Cash Flows. Such amounts are recorded in the period the cash is received. Our policy with respect to involuntary conversion of property, plant and equipment is to record any gain or loss within (gain) loss on disposal/write-down of property, plant and equipment (excluding real estate), net within operating income in our Consolidated Statements of Operations and proceeds received within cash flows from investing activities within our Consolidated Statements of Cash Flows. Losses are recorded when incurred and gains are recorded in the period when the cash received exceeds the carrying value of the related property, plant and equipment.

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2018
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions During the years ended December 31, 2016, 2017 and 2018, the Company had no related party transactions.

Stockholders' Equity Matters

Stockholders' Equity Matters	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
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 2016, 2017 and 2018 , our board of directors declared the following dividends: Declaration Date Dividend Per Share Record Date Total Amount Payment Date February 17, 2016 $ 0.4850 March 7, 2016 $ 102,651 March 21, 2016 May 25, 2016 0.4850 June 6, 2016 127,469 June 24, 2016 July 27, 2016 0.4850 September 12, 2016 127,737 September 30, 2016 October 31, 2016 0.5500 December 15, 2016 145,006 December 30, 2016 February 15, 2017 0.5500 March 15, 2017 145,235 April 3, 2017 May 24, 2017 0.5500 June 15, 2017 145,417 July 3, 2017 July 27, 2017 0.5500 September 15, 2017 146,772 October 2, 2017 October 24, 2017 0.5875 December 15, 2017 166,319 January 2, 2018 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 During the years ended December 31, 2016 , 2017 and 2018 , we declared distributions to our stockholders of $502,863 , $603,743 and $679,130 , respectively. These distributions represent approximately $2.04 per share, $2.27 per share and $2.38 per share for the years ended December 31, 2016 , 2017 and 2018 , respectively, based on the weighted average number of common shares outstanding during each respective year. 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" for tax years beginning after 2017), 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, 2016 , 2017 and 2018 , the dividends we paid on our common shares were classified as follows: Year Ended December 31, 2016 2017 2018 Nonqualified ordinary dividends 45.5 % 82.1 % 83.0 % Qualified ordinary dividends 21.0 % 17.9 % 4.8 % Capital gains — % — % 5.8 % Return of capital 33.5 % 0.0 % 6.4 % 100.0 % 100.0 % 100.0 % Dividends paid during the years ended December 31, 2016, 2017 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, 2016, 2017 and 2018. In 2017, none of our dividends were characterized as a return of capital primarily due to the impact of the Deemed Repatriation Transition Tax associated with the Tax Reform Legislation that impacted the characterization of our 2017 dividends for United States federal income tax purposes. See Note 7 for further disclosure regarding the impact of the Deemed Repatriation Transition Tax. In 2018, the percentage of our dividend that is classified as a capital gain was 5.8% and primarily relates to the sale of land and buildings in the United Kingdom . At The Market (ATM) Equity Program In October 2017, we entered into a distribution agreement (the “Distribution Agreement”) with a syndicate of 10 banks (the “Agents”) pursuant to which we may sell, from time to time, up to an aggregate sales price of $500,000 of our common stock through the Agents (the “At The Market (ATM) Equity Program”). Sales of our common stock made pursuant to the Distribution Agreement may be made in negotiated transactions or transactions that are deemed to be “at the market” offerings as defined in Rule 415 under the Securities Act, including sales made directly on the NYSE, or sales made to or through a market maker other than on an exchange, or as otherwise agreed between the applicable Agent and us. We intend to use the net proceeds from sales of our common stock pursuant to the At The Market (ATM) Equity Program for general corporate purposes, which may include acquisitions and investments, including acquisitions and investments in our data center business, and repaying amounts outstanding from time to time under the Revolving Credit Facility. During the year ended December 31, 2017 under the At The Market (ATM) Equity Program, we sold an aggregate of 1,481,053 shares of common stock for gross proceeds of approximately $60,000 , generating net proceeds of $59,100 , after deducting commissions of $900 . During the quarter ended December 31, 2018, there were no shares of common stock sold under the At The Market (ATM) Equity Program. During the year ended December 31, 2018, under the At The Market (ATM) Equity Program, we sold an aggregate of 273,486 shares of common stock for gross proceeds of approximately $8,800 , generating net proceeds of $8,716 , after deducting commissions of $90 . As of December 31, 2018 the remaining aggregate sale price of shares of our common stock available for distribution under the At The Market (ATM) Equity Program was approximately $431,200 . Equity Offering On December 12, 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 (the “Firm Shares”) of our common stock (the “Equity Offering”). The offering price to the public for the Equity Offering was $37.00 per share, and we agreed to pay the Underwriters an underwriting commission of $1.38195 per share. The net proceeds to us from the Equity Offering, after deducting underwriters' commissions, was $516,462 . Pursuant to the Underwriting Agreement, we granted the Underwriters a 30-day option to purchase from us up to an additional 2,175,000 shares of common stock (the “Option Shares”) at the public offering price, less the underwriting commission and less an amount per share equal to any dividends or distributions declared by us and payable on the Firm Shares but not payable on the Option Shares (the “Over-Allotment Option"). On January 10, 2018, the Underwriters exercised the Over-Allotment Option in its entirety. The net proceeds to us from the exercise of the Over-Allotment Option, after deducting underwriters' commissions and the per share value of the dividend we declared on our common stock on October 24, 2017 (for which the record date was December 15, 2017) which was paid on January 2, 2018, was approximately $76,200 . The net proceeds of the Equity Offering and the Over-Allotment Option, together with the net proceeds from the issuance of the 5 1 / 4 % Notes, were used to finance the purchase price of the IODC Transaction, and to pay related fees and expenses. At December 31, 2017, the net proceeds of the Equity Offering, together with the net proceeds from the 5 1 / 4 % Notes, were used to temporarily repay borrowings under our Revolving Credit Facility and invest in money market funds.

Divestments

Divestments	12 Months Ended
	Dec. 31, 2018
Discontinued Operations and Disposal Groups [Abstract]
Divestments	a. Recall Divestments As disclosed in Note 6, in connection with the acquisition of Recall, we sought regulatory approval of the Recall Transaction from the DOJ, the ACCC, the CCB and the CMA and, as part of the regulatory approval process, we agreed to make the Divestments. The assets and liabilities related to the Initial United States Divestments were sold to Access CIG in the Access Sale on May 4, 2016; the assets and liabilities related to the Australia Divestment Business were sold to the Australia Divestment Business Purchasers in the Australia Sale on October 31, 2016; the assets and liabilities related to the UK Divestments were sold to Oasis Group in the UK Sale on December 9, 2016; and the assets and liabilities associated with the Seattle/Atlanta Divestments and the Canadian Divestments were sold to ARKIVE in the ARKIVE Sale on December 29, 2016. We have concluded that the Australia Divestment Business and the Iron Mountain Canadian Divestments (collectively, the “Iron Mountain Divestments”) do not meet the criteria to be reported as discontinued operations in our Consolidated Statements of Operations and Consolidated Statement of Cash Flows for the year ended December 31, 2016, as our decision to divest these businesses 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 the Iron Mountain Divestments are presented as a component of income (loss) from continuing operations in our Consolidated Statements of Operations for the year ended December 31, 2016 and the cash flows associated with these businesses are presented as a component of cash flows from continuing operations in our Consolidated Statement of Cash Flows for the year ended December 31, 2016 through the closing date of the Australia Sale, in the case of the Australia Divestment Business, and through the closing date of the ARKIVE Sale, in the case of the Iron Mountain Canadian Divestments. During the year ended December 31, 2016, we recorded charges of $15,417 and $1,421 to other expense, net associated with the loss on disposal of the Australia Divestment Business and the Iron Mountain Canadian Divestments, respectively, representing the excess of the carrying value of these businesses compared to their fair value (less costs to sell). We have concluded that the Initial United States Divestments, the Seattle/Atlanta Divestments, the Recall Canadian Divestments and the UK Divestments (collectively, the “Recall Divestments”) meet the criteria to be reported as discontinued operations in our Consolidated Statements of Operations and Consolidated Statements of Cash Flows for the years ended December 31, 2016, 2017 and 2018 as the Recall Divestments met the criteria to be reported as assets and liabilities held for sale at, or within a short period of time following, the closing of the Recall Transaction. The table below summarizes certain results of operations of the Recall Divestments included in discontinued operations for the years ended December 31, 2016, 2017 and 2018: Year Ended December 31, Description 2016(1) 2017 2018(2) Total Revenues $ 13,047 $ — $ — Income (Loss) from Discontinued Operations Before Provision (Benefit) for Income Taxes 4,105 (8,118 ) (12,574 ) Provision (Benefit) for Income Taxes 752 (1,827 ) (147 ) Income (Loss) from Discontinued Operations, Net of Tax $ 3,353 $ (6,291 ) $ (12,427 ) ______________________________________________________________________________ (1) The Access Sale occurred nearly simultaneously with the closing of the Recall Transaction. Accordingly, the revenue and expenses associated with the Initial United States Divestments are not included in our Consolidated Statement of Operations for the year ended December 31, 2016 and the cash flows associated with the Initial United States Divestments are not included in our Consolidated Statement of Cash Flows for the year ended December 31, 2016, due to the immaterial nature of the revenues, expenses and cash flows related to the Initial United States Divestments for the period of time we owned these businesses (May 2, 2016 through May 4, 2016). (2) The loss from discontinued operations during the year ended December 31, 2018 primarily relates to losses incurred due to the resolution of the post-closing adjustments to the Access Contingent Consideration in connection with our agreement with Access CIG. See Note 6. b. Russia and Ukraine Divestment On May 30, 2017, Iron Mountain EES Holdings Ltd. ("IM EES"), a consolidated subsidiary of IMI, sold its records and information management operations in Russia and Ukraine to OSG Records Management (Europe) Limited (“OSG”) in a stock transaction (the “Russia and Ukraine Divestment”). As consideration for the Russia and Ukraine Divestment, IM EES received a 25% equity interest in OSG (the “OSG Investment”). We have concluded that the Russia and Ukraine Divestment does not meet the criteria to be reported as discontinued operations in our consolidated financial statements, as our decision to divest these businesses 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 these businesses are presented as a component of income (loss) from continuing operations in our Consolidated Statements of Operations for the years ended December 31, 2016 and 2017 and the cash flows associated with these businesses are presented as a component of cash flows from continuing operations in our Consolidated Statements of Cash Flows for years ended December 31, 2016 and 2017 through the sale date. As a result of the Russia and Ukraine Divestment, we recorded a gain on sale of $38,869 to Other expense (income), net, in the second quarter of 2017, representing the excess of the fair value of the consideration received over the carrying value of our businesses in Russia and Ukraine. As of the closing date of the Russia and Ukraine Divestment, the fair value of the OSG Investment was approximately $18,000 . We account for the OSG Investment as an equity method investment. As of the closing date of the Russia and Ukraine Divestment, the carrying value of our businesses in Russia and Ukraine was a credit balance of $20,869 , which consisted of (i) a credit balance of approximately $29,100 of cumulative translation adjustment associated with our businesses in Russia and Ukraine that was reclassified from accumulated other comprehensive items, net, (ii) the carrying value of the net assets of our businesses in Russia and Ukraine, excluding goodwill, of $4,716 and (iii) $3,515 of goodwill associated with our former Northern and Eastern Europe reporting unit (of which our businesses in Russia and Ukraine were a component of prior to the Russia and Ukraine Divestment), which was allocated, on a relative fair value basis, to our businesses in Russia and Ukraine. c. IMFS Divestment On September 28, 2018, Iron Mountain Fulfillment Services, Inc. ("IMFS"), a consolidated subsidiary of IMI that operated our fulfillment services business in the United States, sold substantially all of its assets for total consideration of approximately $3,000 (the "IMFS Divestment"). We have concluded that the IMFS Divestment 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 years ended December 31, 2016, 2017 and 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 years ended December 31, 2016, 2017 and 2018 through the sale date. The fair value of the consideration received as a result of the IMFS Divestment approximated the carrying value of IMFS and, therefore, during the third quarter of 2018, we recorded an insignificant loss in connection with the IMFS Divestment to Other expense (income), net.

Significant Acquisition Costs

Significant Acquisition Costs	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Significant Acquisition Costs	Significant Acquisition Costs included in the accompanying Consolidated Statements of Operations are as follows: Year Ended December 31, 2016 2017 2018 Cost of sales (excluding depreciation and amortization) $ 11,963 $ 20,493 $ 7,628 Selling, general and administrative expenses 119,981 64,408 43,037 Total Significant Acquisition Costs $ 131,944 $ 84,901 $ 50,665 Significant Acquisition Costs included in the accompanying Consolidated Statements of Operations by segment are as follows: Year Ended December 31, 2016 2017 2018 North American Records and Information Management Business $ 14,394 $ 15,763 $ 6,202 North American Data Management Business 2,581 2,099 637 Western European Business 16,173 20,290 8,852 Other International Business 18,842 9,570 4,899 Global Data Center Business — — 11,423 Corporate and Other Business 79,954 37,179 18,652 Total Significant Acquisition Costs $ 131,944 $ 84,901 $ 50,665 Accrued liabilities related to Significant Acquisition Costs as of December 31, 2018 was $2,724 , which generally relates to employee severance costs and onerous lease liabilities and is expected to be paid in 2019.

SCHEDULE III - SCHEDULE OF REAL

SCHEDULE III - SCHEDULE OF REAL ESTATE AND ACCUMULATED DEPRECIATION	12 Months Ended
	Dec. 31, 2018
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	IRON MOUNTAIN INCORPORATED SCHEDULE III—SCHEDULE OF REAL ESTATE AND ACCUMULATED DEPRECIATION DECEMBER 31, 2018 (Dollars in thousands) 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 1,140 leased facilities in our real estate portfolio. In addition, Schedule III does not include any value for capital 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.f. to Notes to Consolidated Financial Statements as of December 31, 2018: Gross Amount of Real Estate Assets, As Reported on Schedule III $ 3,700,307 Add Reconciling Items: Book value of racking included in leased facilities(1) 1,270,992 Book value of capital leases(2) 444,711 Book value of construction in progress(3) 196,268 Total Reconciling Items 1,911,971 Gross Amount of Real Estate Assets, As Disclosed in Note 2.f. $ 5,612,278 _______________________________________________________________________________ (1) Represents the gross book value of racking installed in our 1,140 leased facilities, which is included in historical book value of racking in Note 2.f., but excluded from Schedule III. (2) Represents the gross book value of buildings and building improvements that are subject to capital leases, which are included in the historical book value of building and building improvements in Note 2.f., 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.f., but excluded from Schedule III, as such assets are not considered real estate associated with owned buildings. The historical book value of real estate assets associated with owned buildings that were related to construction in progress as of December 31, 2018 is included in Schedule III. IRON MOUNTAIN INCORPORATED SCHEDULE III—SCHEDULE OF REAL ESTATE AND ACCUMULATED DEPRECIATION (Continued) DECEMBER 31, 2018 (Dollars in thousands) 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, 2018: Accumulated Depreciation of Real Estate Assets, As Reported on Schedule III $ 1,011,050 Add Reconciling Items: Accumulated Depreciation - non-real estate assets(1) 1,292,432 Accumulated Depreciation - racking in leased facilities(2) 707,628 Accumulated Depreciation - capital leases(3) 100,282 Total Reconciling Items 2,100,342 Accumulated Depreciation, As Reported on Consolidated Balance Sheet $ 3,111,392 _______________________________________________________________________________ (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, 2018 installed in our 1,140 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, 2018 that are subject to capital 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. IRON MOUNTAIN INCORPORATED SCHEDULE III—SCHEDULE OF REAL ESTATE AND ACCUMULATED DEPRECIATION (Continued) DECEMBER 31, 2018 (Dollars in thousands) (A) (B) (C) (D) (E) (F) Region/Country/State/Campus Address 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 depreciation in latest income statement is computed North America United States (Including Puerto Rico) 140 Oxmoor Ct, Birmingham, Alabama 1 $ — $ 1,322 $ 879 $ 2,201 $ 1,033 2001 Up to 40 years 1420 North Fiesta Blvd, Gilbert, Arizona 1 — 1,637 2,737 4,374 1,760 2001 Up to 40 years 615 North 48th Street, Phoenix, Arizona 1 — 423,107 15,110 438,217 13,283 2018 (5) Up to 40 years 2955 S. 18th Place, Phoenix, Arizona 1 — 12,178 7,848 20,026 4,570 2007 Up to 40 years 4449 South 36th St, Phoenix, Arizona 1 — 7,305 1,047 8,352 4,771 2012 Up to 40 years 851 Princess Drive, Scottsdale, Arizona 1 — 87,865 43 87,908 3,887 2018 (5) Up to 40 years 3381 East Global Loop, Tucson, Arizona 1 — 1,622 4,350 5,972 2,692 2000 Up to 40 years 200 Madrone Way, Felton, California 1 — 760 (60 ) 700 — 1997 Up to 40 years 13379 Jurupa Ave, Fontana, California 1 — 10,472 8,596 19,068 9,241 2002 Up to 40 years 600 Burning Tree Rd, Fullerton, California 1 — 4,762 1,853 6,615 2,849 2002 Up to 40 years 5086 4th St, Irwindale, California 1 — 6,800 2,308 9,108 3,345 2002 Up to 40 years 6933 Preston Ave, Livermore, California 1 — 14,585 13,498 28,083 9,405 2002 Up to 40 years 1006 North Mansfield, Los Angeles, California 1 — 749 — 749 90 2014 Up to 40 years 1025 North Highland Ave, Los Angeles, California 1 — 10,168 24,544 34,712 12,746 1988 Up to 40 years 1350 West Grand Ave, Oakland, California 1 — 15,172 6,207 21,379 14,418 1997 Up to 40 years 1760 North Saint Thomas Circle, Orange, California 1 — 4,576 471 5,047 1,689 2002 Up to 40 years 8700 Mercury Lane, Pico Rivera, California 1 — 27,957 183 28,140 8,838 2012 Up to 40 years 8661 Kerns St, San Diego, California 1 — 10,512 6,690 17,202 6,832 2002 Up to 40 years 1915 South Grand Ave, Santa Ana, California 1 — 3,420 1,235 4,655 1,888 2001 Up to 40 years 2680 Sequoia Dr, South Gate, California 1 — 6,329 2,251 8,580 4,065 2002 Up to 40 years 111 Uranium Drive, Sunnyvale, California 1 — 9,645 5,155 14,800 4,309 2002 Up to 40 years 25250 South Schulte Rd, Tracy, California 1 — 3,049 1,764 4,813 1,928 2001 Up to 40 years 3576 N. Moline, Aurora, Colorado 1 — 1,583 4,320 5,903 1,593 2001 Up to 40 years North Stone Ave, Colorado Springs, Colorado 2 — 761 2,715 3,476 1,645 2001 Up to 40 years 4300 Brighton Boulevard, Denver, Colorado 1 — 116,336 12,206 128,542 4,565 2017 Up to 40 years 11333 E 53rd Ave, Denver, Colorado 1 — 7,403 10,168 17,571 8,708 2001 Up to 40 years 5151 E. 46th Ave, Denver, Colorado 1 — 6,312 133 6,445 1,330 2014 Up to 40 years 20 Eastern Park Rd, East Hartford, Connecticut 1 — 7,417 1,867 9,284 5,909 2002 Up to 40 years Bennett Rd, Suffield, Connecticut 2 — 1,768 926 2,694 1,286 2000 Up to 40 years Kennedy Road, Windsor, Connecticut 2 — 10,447 30,824 41,271 18,845 2001 Up to 40 years 293 Ella Grasso Rd, Windsor Locks, Connecticut 1 — 4,021 1,476 5,497 2,707 2002 Up to 40 years 150-200 Todds Ln, Wilmington, Delaware 1 — 7,226 997 8,223 4,861 2002 Up to 40 years 13280 Vantage Way, Jacksonville, Florida 1 — 1,853 533 2,386 865 2001 Up to 40 years 12855 Starkey Rd, Largo, Florida 1 — 3,293 2,957 6,250 2,971 2001 Up to 40 years 7801 Riviera Blvd, Miramar, Florida 1 — 8,250 64 8,314 593 2017 Up to 40 years 10002 Satellite Blvd, Orlando, Florida 1 — 1,927 295 2,222 834 2001 Up to 40 years IRON MOUNTAIN INCORPORATED SCHEDULE III—SCHEDULE OF REAL ESTATE AND ACCUMULATED DEPRECIATION (Continued) DECEMBER 31, 2018 (Dollars in thousands) (A) (B) (C) (D) (E) (F) Region/Country/State/Campus Address Facilities(1) Encumbrances Initial cost to Company(1) Cost capitalized subsequent to acquisition (1)(2) Gross amount Accumulated depreciation at close of current period(1)(8) Date of construction or acquired(3) Life on which depreciation in latest income statement is computed United States (Including Puerto Rico) (continued) 3501 Electronics Way, West Palm Beach, Florida 1 $ — $ 4,201 $ 13,545 $ 17,746 $ 6,334 2001 Up to 40 years 1890 MacArthur Blvd, Atlanta Georgia 1 — 1,786 742 2,528 1,049 2002 Up to 40 years 3881 Old Gordon Rd, Atlanta, Georgia 1 — 1,185 322 1,507 826 2001 Up to 40 years 5319 Tulane Drive SW, Atlanta, Georgia 1 — 2,808 3,923 6,731 2,731 2002 Up to 40 years 6111 Live Oak Parkway, Norcross, Georgia 1 — 3,542 1,087 4,629 266 2017 Up to 40 years 3150 Nifda Dr, Smyrna, Georgia 1 — 463 745 1,208 699 1990 Up to 40 years 1301 S. Rockwell St, Chicago, Illinois 1 — 7,947 18,915 26,862 15,084 1999 Up to 40 years 2211 W. Pershing Rd, Chicago, Illinois 1 — 4,264 13,490 17,754 7,862 2001 Up to 40 years 2425 South Halsted St, Chicago, Illinois 1 — 7,470 1,471 8,941 4,058 2006 Up to 40 years 2604 West 13th St, Chicago, Illinois 1 — 404 2,733 3,137 2,729 2001 Up to 40 years 2255 Pratt Blvd, Elk Grove, Illinois 1 — 1,989 3,892 5,881 1,350 2000 Up to 40 years 4175 Chandler Dr Opus No. Corp, Hanover Park, Illinois 1 — 22,048 1,481 23,529 8,763 2014 Up to 40 years 2600 Beverly Drive, Lincoln, Illinois 1 — 1,378 923 2,301 189 2015 Up to 40 years 6120 Churchman Bypass, Indianapolis, Indiana 1 — 4,827 8,321 13,148 5,896 2002 Up to 40 years 6090 NE 14th Street, Des Moines, Iowa 1 — 622 482 1,104 373 2003 Up to 40 years South 7th St, Louisville, Kentucky 4 — 709 12,543 13,252 4,708 Various Up to 40 years 900 Distributors Row, New Orleans, Louisiana 1 — 7,607 1,307 8,914 5,780 2002 Up to 40 years 1274 Commercial Drive, Port Allen, Louisiana 1 — 2,680 3,887 6,567 2,782 2003 Up to 40 years 26 Parkway Drive (fka 133 Pleasant), Scarborough, Maine 1 — 8,337 286 8,623 2,909 2015 (7) Up to 40 years 8928 McGaw Ct, Columbia, Maryland 1 — 2,198 6,406 8,604 3,278 1999 Up to 40 years 10641 Iron Bridge Rd, Jessup, Maryland 1 — 3,782 1,127 4,909 2,443 2000 Up to 40 years 8275 Patuxent Range Rd, Jessup, Maryland 1 — 10,105 7,679 17,784 9,420 2001 Up to 40 years 96 High St, Billerica, Massachusetts 1 — 3,221 3,895 7,116 3,507 1998 Up to 40 years 120 Hampden St, Boston, Massachusetts 1 — 164 742 906 510 2002 Up to 40 years 32 George St, Boston, Massachusetts 1 — 1,820 5,374 7,194 5,163 1991 Up to 40 years 3435 Sharps Lot Rd, Dighton, Massachusetts 1 — 1,911 788 2,699 2,022 1999 Up to 40 years 77 Constitution Boulevard, Franklin, Massachusetts 1 — 5,413 135 5,548 570 2014 Up to 40 years 216 Canal St, Lawrence, Massachusetts 1 — 1,298 1,079 2,377 1,194 2001 Up to 40 years Bearfoot Road, Northboro, Massachusetts 2 — 55,923 24,897 80,820 39,580 Various Up to 40 years 38300 Plymouth Road, Livonia, Michigan 1 — 10,285 1,237 11,522 3,554 2015 (7) Up to 40 years 6601 Sterling Dr South, Sterling Heights, Michigan 1 — 1,294 1,124 2,418 1,206 2002 Up to 40 years 1985 Bart Ave, Warren, Michigan 1 — 1,802 530 2,332 1,040 2000 Up to 40 years Wahl Court, Warren, Michigan 2 — 3,426 2,613 6,039 3,528 Various Up to 40 years 31155 Wixom Rd, Wixom, Michigan 1 — 4,000 1,372 5,372 2,503 2001 Up to 40 years 3140 Ryder Trail South, Earth City, Missouri 1 — 3,072 3,331 6,403 2,149 2004 Up to 40 years Missouri Bottom Road, Hazelwood, Missouri 3 — 28,282 4,158 32,440 6,738 2016 (7) Up to 40 years Leavenworth St/18th St, Omaha, Nebraska 3 — 2,924 18,968 21,892 6,715 Various Up to 40 years IRON MOUNTAIN INCORPORATED SCHEDULE III—SCHEDULE OF REAL ESTATE AND ACCUMULATED DEPRECIATION (Continued) DECEMBER 31, 2018 (Dollars in thousands) (A) (B) (C) (D) (E) (F) Region/Country/State/Campus Address Facilities(1) Encumbrances Initial cost to Company(1) Cost capitalized subsequent to acquisition (1)(2) Gross amount Accumulated depreciation at close of current period(1)(8) Date of construction or acquired(3) Life on which depreciation in latest income statement is computed United States (Including Puerto Rico) (continued) 4105 North Lamb Blvd, Las Vegas, Nevada 1 $ — $ 3,430 $ 8,909 $ 12,339 $ 5,426 2002 Up to 40 years 17 Hydro Plant Rd, Milton, New Hampshire 1 — 6,179 4,180 10,359 6,160 2001 Up to 40 years Kimberly Rd, East Brunsick, New Jersey 3 — 22,105 5,882 27,987 13,467 Various Up to 40 years 3003 Woodbridge Avenue, Edison, New Jersey 1 — 310,404 10,086 320,490 8,836 2018 (5) Up to 40 years 811 Route 33, Freehold, New Jersey 3 — 38,697 54,175 92,872 48,720 Various Up to 40 years 51-69 & 77-81 Court St, Newark, New Jersey 1 — 11,734 6,273 18,007 945 2015 Up to 40 years 560 Irvine Turner Blvd, Newark, New Jersey 1 — 9,522 660 10,182 634 2015 Up to 40 years 231 Johnson Ave, Newark, New Jersey 1 — 8,945 1,202 10,147 655 2015 Up to 40 years 650 Howard Avenue, Somerset, New Jersey 1 — 3,585 11,686 15,271 5,442 2006 Up to 40 years 555 Gallatin Place, Albuquerque, New Mexico 1 — 4,083 852 4,935 2,440 2001 Up to 40 years 7500 Los Volcanes Rd NW, Albuquerque, New Mexico 1 — 2,801 1,942 4,743 2,613 1999 Up to 40 years 100 Bailey Ave, Buffalo, New York 1 — 1,324 10,979 12,303 6,111 1998 Up to 40 years 64 Leone Ln, Chester, New York 1 — 5,086 1,132 6,218 3,357 2000 Up to 40 years 1368 County Rd 8, Farmington, New York 1 — 2,611 4,525 7,136 4,387 1998 Up to 40 years County Rd 10, Linlithgo, New York 2 — 102 2,959 3,061 1,511 2001 Up to 40 years 77 Seaview Blvd, N. Hempstead New York 1 — 5,719 1,417 7,136 2,515 2006 Up to 40 years 37 Hurds Corner Road, Pawling, New York 1 — 4,323 1,099 5,422 2,075 2005 Up to 40 years Ulster Ave/Route 9W, Port Ewen, New York 3 — 23,137 10,401 33,538 21,265 2001 Up to 40 years Binnewater Rd, Rosendale, New York 2 — 5,142 11,312 16,454 6,250 Various Up to 40 years 220 Wavel St, Syracuse, New York 1 — 2,929 2,615 5,544 2,741 1997 Up to 40 years 2235 Cessna Drive, Burlington, North Carolina 1 — 1,602 328 1,930 167 2015 Up to 40 years 14500 Weston Pkwy, Cary, North Carolina 1 — 1,880 2,113 3,993 1,749 1999 Up to 40 years 826 Church Street, Morrisville, North Carolina 1 — 7,087 153 7,240 1,116 2017 Up to 40 years 11350 Deerfield Rd, Cincinnati, Ohio 1 — 4,259 599 4,858 2,653 2015 (7) Up to 40 years 1034 Hulbert Ave, Cincinnati, Ohio 1 — 786 877 1,663 815 2000 Up to 40 years 1275 East 40th, Cleveland, Ohio 1 — 3,129 576 3,705 1,924 1999 Up to 40 years 7208 Euclid Avenue, Cleveland, Ohio 1 — 3,336 3,259 6,595 2,901 2001 Up to 40 years 4260 Tuller Ridge Rd, Dublin, Ohio 1 — 1,030 1,810 2,840 1,405 1999 Up to 40 years 3366 South Tech Boulevard, Miamisburg, Ohio 1 — 29,092 57 29,149 962 2018 (5) Up to 40 years 2120 Buzick Drive, Obetz, Ohio 1 — 4,317 15,070 19,387 7,396 2003 Up to 40 years 302 South Byrne Rd, Toledo, Ohio 1 — 602 1,079 1,681 683 2001 Up to 40 years Partnership Drive, Oklahoma City, Oklahoma 3 — 11,437 299 11,736 2,950 2015 (7) Up to 40 years 7530 N. Leadbetter Road, Portland, Oregon 1 — 5,187 1,874 7,061 4,005 2002 Up to 40 years Branchton Rd, Boyers, Pennsylvania 3 — 21,166 224,322 245,488 53,526 Various Up to 40 years 1201 Freedom Rd, Cranberry Township, Pennsylvania 1 — 1,057 12,627 13,684 6,692 2001 Up to 40 years 800 Carpenters Crossings, Folcroft, Pennsylvania 1 — 2,457 953 3,410 1,959 2000 Up to 40 years 36 Great Valley Pkwy, Malvern, Pennsylvania 1 — 2,397 7,048 9,445 4,057 1999 Up to 40 years 2300 Newlins Mill Road, Palmer Township, Pennsylvania 1 — 18,365 7,313 25,678 674 2017 Up to 40 years IRON MOUNTAIN INCORPORATED SCHEDULE III—SCHEDULE OF REAL ESTATE AND ACCUMULATED DEPRECIATION (Continued) DECEMBER 31, 2018 (Dollars in thousands) (A) (B) (C) (D) (E) (F) Region/Country/State/Campus Address Facilities(1) Encumbrances Initial cost to Company(1) Cost capitalized subsequent to acquisition (1)(2) Gross amount Accumulated depreciation at close of current period(1)(8) Date of construction or acquired(3) Life on which depreciation in latest income statement is computed United States (Including Puerto Rico) (continued) Henderson Dr/Elmwood Ave, Sharon Hill, Pennsylvania 3 $ — $ 24,153 $ 10,314 $ 34,467 $ 17,150 Various Up to 40 years Las Flores Industrial Park, Rio Grande, Puerto Rico 1 — 4,185 3,426 7,611 4,129 2001 Up to 40 years 24 Snake Hill Road, Chepachet, Rhode Island 1 — 2,659 2,202 4,861 2,732 2001 Up to 40 years 1061 Carolina Pines Road, Columbia, South Carolina 1 — 11,776 1,693 13,469 2,766 2016 (7) Up to 40 years 2301 Prosperity Way, Florence, South Carolina 1 — 2,846 1,056 3,902 1,015 2016 (7) Up to 40 years Mitchell Street, Knoxville, Tennessee 2 — 718 4,526 5,244 1,818 Various Up to 40 years 415 Brick Church Park Dr, Nashville, Tennessee 1 — 2,312 4,191 6,503 3,674 2000 Up to 40 years 6005 Dana Way, Nashville, Tennessee 2 — 1,827 2,849 4,676 1,741 2000 Up to 40 years 11406 Metric Blvd, Austin, Texas 1 — 5,489 2,035 7,524 3,913 2002 Up to 40 years 6600 Metropolis Drive, Austin, Texas 1 — 4,519 396 4,915 1,187 2011 Up to 40 years Capital Parkway, Carrollton, Texas 3 — 8,299 222 8,521 2,523 2015 (7) Up to 40 years 1800 Columbian Club Dr, Carrolton, Texas 1 — 19,673 1,163 20,836 8,725 2013 Up to 40 years 1905 John Connally Dr, Carrolton, Texas 1 — 2,174 746 2,920 1,290 2000 Up to 40 years 13425 Branchview Ln, Dallas, Texas 1 — 3,518 3,475 6,993 4,055 2001 Up to 40 years Cockrell Ave, Dallas, Texas 1 — 1,277 1,554 2,831 1,948 2000 Up to 40 years 1819 S. Lamar St, Dallas, Texas 1 — 3,215 812 4,027 2,426 2000 Up to 40 years 2000 Robotics Place Suite B, Fort Worth, Texas 1 — 5,328 610 5,938 2,769 2002 Up to 40 years 1202 Ave R, Grand Prairie, Texas 1 — 8,354 2,059 10,413 5,592 2003 Up to 40 years 15333 Hempstead Hwy, Houston, Texas 3 — 6,327 37,476 43,803 11,332 2004 Up to 40 years 2600 Center Street, Houston, Texas 1 — 2,840 1,741 4,581 2,426 2000 Up to 40 years 3502 Bissonnet St, Houston, Texas 1 — 7,687 597 8,284 5,612 2002 Up to 40 years 5249 Glenmont Ave, Houston, Texas 1 — 3,467 2,379 5,846 2,548 2000 Up to 40 years 5707 Chimney Rock, Houston, Texas 1 — 1,032 1,046 2,078 1,037 2002 Up to 40 years 5757 Royalton Dr, Houston, Texas 1 — 1,795 994 2,789 1,221 2000 Up to 40 years 6203 Bingle Rd, Houston, Texas 1 — 3,188 11,467 14,655 8,244 2001 Up to 40 years 7800 Westpark, Houston, Texas 1 — 6,323 1,203 7,526 1,651 2015 (7) Up to 40 years 9601 West Tidwell, Houston, Texas 1 — 1,680 1,958 3,638 1,189 2001 Up to 40 years 15300 FM 1825, Pflugerville, Texas 2 — 3,811 7,910 11,721 4,594 2001 Up to 40 years 929 South Medina St, San Antonio, Texas 1 — 3,883 1,312 5,195 2,553 2002 Up to 40 years 930 Avenue B, San Antonio, Texas 1 — 393 230 623 236 1998 Up to 40 years 931 North Broadway, San Antonio, Texas 1 — 3,526 962 4,488 2,753 1999 Up to 40 years 1665 S. 5350 West, Salt Lake City, Utah 1 — 6,239 4,215 10,454 4,850 2002 Up to 40 years 11052 Lakeridge Pkwy, Ashland, Virginia 1 — 1,709 1,890 3,599 1,712 1999 Up to 40 years 2301 International Parkway, Fredericksburg, Virginia 1 — 20,980 27 21,007 5,157 2015 (7) Up to 40 years 4555 Progress Road, Norfolk, Virginia 1 — 6,527 1,021 7,548 3,053 2011 Up to 40 years 3725 Thirlane Rd. N.W., Roanoke, Virginia 1 — 2,577 129 2,706 974 2015 (7) Up to 40 years 7700-7730 Southern Dr, Springfield, Virginia 1 — 14,167 2,649 16,816 9,156 2002 Up to 40 years IRON MOUNTAIN INCORPORATED SCHEDULE III—SCHEDULE OF REAL ESTATE AND ACCUMULATED DEPRECIATION (Continued) DECEMBER 31, 2018 (Dollars in thousands) (A) (B) (C) (D) (E) (F) Region/Country/State/Campus Address Facilities(1) Encumbrances Initial cost to Company(1) Cost capitalized subsequent to acquisition (1)(2) Gross amount Accumulated depreciation at close of current period(1)(8) Date of construction or acquired(3) Life on which depreciation in latest income statement is computed United States (Including Puerto Rico) (continued) 8001 Research Way, Springfield, Virginia 1 $ — $ 5,230 $ 2,656 $ 7,886 $ 3,123 2002 Up to 40 years 22445 Randolph Dr, Sterling, Virginia 1 — 7,598 3,719 11,317 5,697 2005 Up to 40 years 307 South 140th St, Burien, Washington 1 — 2,078 2,271 4,349 2,173 1999 Up to 40 years 8908 W. Hallett Rd, Cheney, Washington 1 — 510 4,253 4,763 1,880 1999 Up to 40 years 6600 Hardeson Rd, Everett, Washington 1 — 5,399 3,348 8,747 3,315 2002 Up to 40 years 19826 Russell Rd, South, Kent, Washington 1 — 14,793 9,324 24,117 10,004 2002 Up to 40 years 1201 N. 96th St, Seattle, Washington 1 — 4,496 2,036 6,532 3,348 2001 Up to 40 years 4330 South Grove Road, Spokane, Washington 1 — 3,906 820 4,726 336 2015 Up to 40 years 12021 West Bluemound Road, Wauwatosa, Wisconsin 1 — 1,307 2,124 3,431 1,344 1999 Up to 40 years 190 — 1,914,610 937,469 2,852,079 752,014 Canada One Command Court, Bedford 1 — 3,847 4,072 7,919 3,642 2000 Up to 40 years 195 Summerlea Road, Brampton 1 — 5,403 5,661 11,064 4,639 2000 Up to 40 years 10 Tilbury Court, Brampton 1 — 5,007 15,941 20,948 6,726 2000 Up to 40 years 8825 Northbrook Court, Burnaby 1 — 8,091 1,444 9,535 4,120 2001 Up to 40 years 8088 Glenwood Drive, Burnaby 1 — 4,326 6,584 10,910 4,091 2005 Up to 40 years 5811 26th Street S.E., Calgary 1 — 14,658 7,145 21,803 9,898 2000 Up to 40 years 3905-101 Street, Edmonton 1 — 2,020 469 2,489 1,414 2000 Up to 40 years 68 Grant Timmins Drive, Kingston 1 — 3,639 430 4,069 202 2016 Up to 40 years 3005 Boul. Jean-Baptiste Deschamps, Lachine 1 — 2,751 (8 ) 2,743 1,243 2000 Up to 40 years 1655 Fleetwood, Laval 1 — 8,196 16,896 25,092 11,108 2000 Up to 40 years 4005 Richelieu, Montreal 1 — 1,800 1,802 3,602 1,475 2000 Up to 40 years 1209 Algoma Rd, Ottawa 1 — 1,059 5,861 6,920 3,551 2000 Up to 40 years 1650 Comstock Rd, Ottawa 1 — 7,478 (404 ) 7,074 2,360 2017 Up to 40 years 235 Edson Street, Saskatoon 1 — 829 1,532 2,361 737 2008 Up to 40 years 640 Coronation Drive, Scarborough 1 — 1,853 (106 ) 1,747 568 2000 Up to 40 years 610 Sprucewood Ave, Windsor 1 — 1,243 1,653 2,896 1,137 2007 Up to 40 years 16 — 72,200 68,972 141,172 56,911 206 — 1,986,810 1,006,441 2,993,251 808,925 IRON MOUNTAIN INCORPORATED SCHEDULE III—SCHEDULE OF REAL ESTATE AND ACCUMULATED DEPRECIATION (Continued) DECEMBER 31, 2018 (Dollars in thousands) (A) (B) (C) (D) (E) (F) Region/Country/State/Campus Address Facilities(1) Encumbrances Initial cost to Cost capitalized (1)(2) Gross amount Accumulated Date of Life on which Europe Gewerbeparkstr. 3, Vienna, Austria 1 $ — $ 6,542 $ 7,121 $ 13,663 $ 2,946 2010 Up to 40 years Woluwelaan 147, Diegem, Belgium 1 — 2,541 6,438 8,979 3,926 2003 Up to 40 years Stupničke Šipkovine 62, Zagreb, Croatia 1 — 1,408 (34 ) 1,374 17 2018 Up to 40 years Kratitirion 9 Kokkinotrimithia Industrial District, Nicosia, Cyprus 1 — 3,136 659 3,795 201 2017 Up to 40 years Karyatidon 1, Agios Sylas Industrial Area (3rd), Limassol, Cyprus 1 — 1,935 282 2,217 132 2017 Up to 40 years 628 Western Avenue, Acton, England 1 — 2,070 (291 ) 1,779 754 2003 Up to 40 years 65 Egerton Road, Birmingham, England 1 — 6,980 1,259 8,239 4,519 2003 Up to 40 years Corby 278, Long Croft Road, Corby, England 1 — 20,486 (877 ) 19,609 177 2018 Up to 40 years Otterham Quay Lane, Gillingham, England 9 — 7,418 2,670 10,088 4,857 2003 Up to 40 years Pennine Way, Hemel Hempstead, England 1 — 10,847 5,516 16,363 6,447 2004 Up to 40 years Kemble Industrial Park, Kemble, England 2 — 5,277 6,558 11,835 7,951 2004 Up to 40 years Gayton Road, Kings Lynn, England 3 — 3,119 1,617 4,736 2,680 2003 Up to 40 years Cody Road, London, England 2 — 20,307 8,033 28,340 10,244 2003 Up to 40 years Unit 10 High Cross Centre, London, England 1 — 3,598 544 4,142 1,219 2003 Up to 40 years Old Poplar Bus Garage, London, England 1 — 4,639 1,647 6,286 3,416 2003 Up to 40 years 17 Broadgate, Oldham, England 1 — 4,039 192 4,231 2,156 2008 Up to 40 years Harpway Lane, Sopley, England 1 — 681 1,372 2,053 1,277 2004 Up to 40 years Unit 1A Broadmoor Road, Swindom, England 1 — 2,636 372 3,008 1,062 2006 Up to 40 years Jeumont-Schneider, Champagne Sur Seine, France 3 — 1,750 2,508 4,258 2,110 2003 Up to 40 years Bat I-VII Rue de Osiers, Coignieres, France 4 — 21,318 840 22,158 2,993 2016 (4) Up to 40 years 26 Rue de I Industrie, Fergersheim, France 1 — 1,322 (55 ) 1,267 176 2016 (4) Up to 40 years Bat A, B, C1, C2, C3 Rue Imperiale, Gue de Longroi, France 1 — 3,390 784 4,174 628 2016 (4) Up to 40 years Le Petit Courtin Site de Dois, Gueslin, Mingieres, France 1 — 14,141 11 14,152 1,364 2016 (4) Up to 40 years ZI des Sables, Morangis, France 1 918 12,407 15,111 27,518 18,505 2004 Up to 40 years 45 Rue de Savoie, Manissieux, Saint Priest, France 1 — 5,546 (75 ) 5,471 586 2016 (4) Up to 40 years Gutenbergstrabe 55, Hamburg, Germany 1 — 4,022 739 4,761 711 2016 (4) Up to 40 years Brommer Weg 1, Wipshausen, Germany 1 — 3,220 1,619 4,839 3,218 2006 Up to 40 years Warehouse and Offices 4 Springhill, Cork, Ireland 1 — 9,040 2,797 11,837 4,244 2014 Up to 40 years 17 Crag Terrace, Dublin, Ireland 1 — 2,818 810 3,628 1,267 2001 Up to 40 years Damastown Industrial Park, Dublin, Ireland 1 — 16,034 7,350 23,384 6,986 2012 Up to 40 years Portsmuiden 46, Amsterdam, The Netherlands 1 — 1,852 1,936 3,788 2,082 2015 (7) Up to 40 years Schepenbergweg 1, Amsterdam, The Netherlands 1 — 1,258 (633 ) 625 283 2015 (7) Up to 40 years IRON MOUNTAIN INCORPORATED SCHEDULE III—SCHEDULE OF REAL ESTATE AND ACCUMULATED DEPRECIATION (Continued) DECEMBER 31, 2018 (Dollars in thousands) (A) (B) (C) (D) (E) (F) Region/Country/State/Campus Address Facilities(1) Encumbrances Initial cost to Company(1) Cost capitalized subsequent to acquisition (1)(2) Gross amount Accumulated depreciation at close of current period(1)(8) Date of construction or acquired(3) Life on which depreciation in latest income statement is computed Europe (Continued) Vareseweg 130, Rotterdam, The Netherlands 1 $ — $ 1,357 $ 1,500 $ 2,857 $ 2,106 2015 (7) Up to 40 years Howemoss Drive, Aberdeen, Scotland 2 — 6,970 5,120 12,090 4,296 Various Up to 40 years Traquair Road, Innerleithen, Scotland 1 — 113 2,092 2,205 981 2004 Up to 40 years Nettlehill Road, Houston Industrial Estate, Livingston, Scotland 1 — 11,517 24,131 35,648 16,177 2001 Up to 40 years Av Madrid s/n Poligono Industrial Matillas, Alcala de Henares, Spain 1 — 186 240 426 324 2014 Up to 40 years Calle Bronce, 37, Chiloeches, Spain 1 — 11,011 2,071 13,082 2,819 2010 Up to 40 years Ctra M.118 , Km.3 Parcela 3, Madrid, Spain 1 — 3,981 5,497 9,478 5,910 2001 Up to 40 years Fundicion 8, Rivas-Vaciamadrid, Spain 1 — 1,022 2,389 3,411 1,969 2002 Up to 40 years Abanto Ciervava, Spain 2 — 1,053 (60 ) 993 440 Various Up to 40 years 60 918 242,987 119,800 362,787 134,156 Latin America Amancio Alcorta 2396, Buenos Aires, Argentina 2 — 655 2,227 2,882 724 Various Up to 40 years Azara 1245, Buenos Aires, Argentina 1 — 166 (162 ) 4 — 1998 Up to 40 years Saraza 6135, Buenos Aires, Argentina 1 — 144 345 489 161 1995 Up to 40 years Spegazzini, Ezeiza Buenos Aires, Argentina 1 — 12,773 (7,806 ) 4,967 729 2012 Up to 40 years Av Ernest de Moraes 815, Bairro Fim do Campo, Jarinu Brazil 1 — 12,562 (2,149 ) 10,413 1,135 2016 (4) Up to 40 years Rua Peri 80, Jundiai, Brazil 2 — 8,894 (1,609 ) 7,285 851 2016 (4) Up to 40 years Francisco de Souza e Melo, Rio de Janerio, Brazil 3 — 1,868 8,087 9,955 2,827 Various Up to 40 years Hortolandia, Sao Paulo, Brazil 1 — 24,078 2,100 26,178 2,945 2014 Up to 40 years El Taqueral 99, Santiago, Chile 2 — 2,629 34,372 37,001 9,662 2006 Up to 40 years Panamericana Norte 18900, Santiago, Chile 5 — 4,001 17,900 21,901 7,928 2004 Up to 40 years Avenida Prolongacion del Colli 1104, Guadalajara, Mexico 1 — 374 1,061 1,435 895 2002 Up to 40 years Privada Las Flores No. 25 (G3), Guadalajara, Mexico 1 — 905 993 1,898 888 2004 Up to 40 years Tula KM Parque de Las, Huehuetoca, Mexico 2 — 19,937 (1,910 ) 18,027 1,825 2016 (4) Up to 40 years Carretera Pesqueria Km2.5(M3), Monterrey, Mexico 2 — 3,537 3,227 6,764 2,328 2004 Up to 40 years Lote 2, Manzana A, (T2& T3), Toluca, Mexico 1 — 2,204 3,561 5,765 4,352 2002 Up to 40 years Prolongacion de la Calle 7 (T4), Toluca, Mexico 1 — 7,544 12,049 19,593 6,731 2007 Up to 40 years Panamericana Sur, KM 57.5, Lima, Peru 7 2,020 1,549 685 2,234 1,206 Various Up to 40 years Av. Elmer Faucett 3462, Lima, Peru 2 — 4,112 4,691 8,803 4,456 Various Up to 40 years Calle Los Claveles-Seccion 3, Lima, Peru 1 — 8,179 31,813 39,992 7,494 2010 Up to 40 years 37 2,020 116,111 109,475 225,586 57,137 IRON MOUNTAIN INCORPORATED SCHEDULE III—SCHEDULE OF REAL ESTATE AND ACCUMULATED DEPRECIATION (Continued) DECEMBER 31, 2018 (Dollars in thousands) (A) (B) (C) (D) (E) (F) Region/Country/State/Campus Address Facilities(1) Encumbrances Initial cost to Cost capitalized (1)(2) Gross amount Accumulated Date of Life on which Asia 8 Whitestone Drive, Austins Ferry, Australia 1 $ — $ 681 $ 2,550 $ 3,231 $ 335 2012 Up to 40 years 6 Norwich Street, South Launceston, Australia 1 — 1,090 (77 ) 1,013 74 2015 Up to 40 years Warehouse No 4, Shanghai, China 1 — 1,530 769 2,299 452 2013 Up to 40 years Jalan Karanggan Muda Raya No 59, Bogor Indonesia 1 — 7,897 (444 ) 7,453 1,316 2017 Up to 40 years 1 Serangoon North Avenue 6, Singapore 1 — 58,637 (1,688 ) 56,949 3,049 2018 (6) Up to 40 years 2 Yung Ho Road, Singapore 1 — 10,395 3,667 14,062 1,144 2016 (4) Up to 40 years 26 Chin Bee Drive, Singapore 1 — 15,699 (465 ) 15,234 1,240 2016 (4) Up to 40 years IC1 69 Moo 2, Soi Wat Namdaeng, Bangkok, Thailand 2 — 13,226 5,216 18,442 3,222 2016 (4) Up to 40 years 9 — 109,155 9,528 118,683 10,832 Total 312 $ 2,938 $ 2,455,063 $ 1,245,244 $ 3,700,307 $ 1,011,050 ____________________________________ (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 1,140 leased facilities in our real estate portfolio. In addition, the above information does not include any value for capital 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, acquired the facility through purchase or acquisition. (4) Property was acquired in connection with the Recall Transaction. (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. IRON MOUNTAIN INCORPORATED SCHEDULE III—SCHEDULE OF REAL ESTATE AND ACCUMULATED DEPRECIATION (Continued) DECEMBER 31, 2018 (Dollars in thousands) (8) The following tables present the changes in gross carrying amount of real estate owned and accumulated depreciation for the years ended December 31, 2017 and 2018: Year Ended December 31, Gross Carrying Amount of Real Estate 2017 2018 Gross amount at beginning of period $ 2,427,540 $ 2,707,925 Additions during period: Acquisitions(1) 121,790 918,091 Discretionary capital projects 94,658 155,901 Foreign currency translation fluctuations 66,666 (58,798 ) 283,114 1,015,194 Deductions during period: Cost of real estate sold or disposed (2,729 ) (22,812 ) Gross amount at end of period $ 2,707,925 $ 3,700,307 _______________________________________________________________________________ (1) Includes acquisition of sites through business combinations and purchase accounting adjustments. Year Ended December 31, Accumulated Depreciation 2017 2018 Gross amount of accumulated depreciation at beginning of period $ 808,481 $ 909,092 Additions during period: Depreciation 83,488 125,280 Foreign currency translation fluctuations 18,183 (16,016 ) 101,671 109,264 Deductions during period: Amount of accumulated depreciation for real estate assets sold or disposed (1,060 ) (7,306 ) Gross amount of end of period $ 909,092 $ 1,011,050 The aggregate cost of our real estate assets for federal tax purposes at December 31, 2018 was approximately $3,400,000 .

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Principals of Consolidation	Principles 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	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.
Cash, Cash Equivalents and Restricted Cash	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.
Foreign Currency	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. Resulting translation adjustments are reflected in the accumulated other comprehensive, net component of Iron Mountain Incorporated Stockholders' Equity.
Derivatives Instruments and Hedging Activities	Derivative 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 target approximately 75% of our debt portfolio to be fixed with respect to interest rates. Occasionally, we may use interest rate swaps as a tool to maintain our targeted level of fixed rate debt. In addition, we may 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. Sometimes we enter into currency swaps to temporarily hedge an overseas investment, such as a major acquisition, while we arrange permanent financing or to hedge our exposure due to foreign currency exchange movements related to our intercompany accounts with and between our foreign subsidiaries.
Property, Plant and Equipment	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): 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 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. When the liability is initially recorded, the entity capitalizes the cost by increasing the carrying amount of the related long-lived asset, which is then depreciated over the useful life of the related asset. The liability is increased over time through accretion expense (included in depreciation expense) such that the liability will equate to the future cost to retire the long-lived asset at the expected retirement date. Upon settlement of the liability, an entity either settles the obligation for its recorded amount or realizes a gain or loss upon settlement. 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 obligation 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. 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. 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. 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.
Long-Lived Assets	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 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. Reporting unit valuations have generally been determined using a combined approach based on the present value of future cash flows and market multiples. The income approach incorporates many assumptions including future growth rates and operating margins, discount rate factors, expected capital expenditures and income tax cash flows. Changes in economic and operating conditions impacting these assumptions 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.
Customer Relationships and Acquisitions Costs and Other Intangible Assets	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 ten to 30 years (weighted average of 18 years at December 31, 2018 ) and are included in depreciation and amortization in the accompanying Consolidated Statements of Operations. The value of customer relationship intangible assets is calculated based upon estimates of their fair value. Data Center Intangible Assets and Liabilities Finite-lived intangible assets associated with our 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") are acquired through either business combinations or asset acquisitions in our data center business. These intangible assets 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 (weighted average of six years as of December 31, 2018) and are included in depreciation and amortization in the accompanying Consolidated Statements of Operations. 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 (weighted average of nine years as of December 31, 2018) and are included in depreciation and amortization in the accompanying Consolidated Statements of Operations. Data Center In-Place Leases and Data Center Tenant Relationships are included in Customer relationships, customer inducements and data center lease-based intangibles in the accompanying Consolidated Balance Sheets. Data Center Above-Market and Below-Market In-Place Lease Intangible Assets 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”) are acquired through either business combinations or asset acquisitions in our data center business. We record Data Center Above-Market Leases and 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 (weighted average of four years as of December 31, 2018) and Data Center Below-Market Leases (weighted average of nine years as of December 31, 2018) are amortized over the remaining non-cancellable term of the acquired in-place lease to storage revenue in the accompanying Consolidated Statements of Operations. Data Center Above-Market Leases are included in Customer relationships, customer inducements and data center lease-based intangibles in the accompanying Consolidated Balance Sheets. Data Center Below-Market Leases are included in Other long-term liabilities in the accompanying Consolidated Balance Sheets.
Deferred Financing Costs	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.
Revenues	Customer Inducements Prior to the adoption of ASU 2014-09, free intake costs to transport boxes to one of our facilities, which include labor and transportation costs ("Free Move Costs"), were capitalized and amortized over periods ranging from ten to 30 years. The amortization of Free Move Costs is included in depreciation and amortization in the accompanying Consolidated Statements of Operations for the years ended December 31, 2016 and 2017. Subsequent to the adoption of ASU 2014-09, Free Move Costs are considered a Contract Fulfillment Cost (as defined in Note 2.l.) and, therefore, are now deferred and amortized and included in amortization expense over three years, consistent with the transfer of the performance obligation to the customer to which the asset relates. See Note 2.l. for information regarding the accounting for Free Move Costs, which are now a component of Intake Costs (as defined in Note 2.l.), following the adoption of ASU 2014-09. Payments that are made to a customer's current records management vendor in order to terminate the customer's existing contract with that vendor, or direct payments to a customer ("Permanent Withdrawal Fees"), are amortized over periods ranging from five to 15 years (weighted average of seven years as of December 31, 2018) and are included in storage and service revenue in the accompanying Consolidated Statements of Operations. Our accounting for Permanent Withdrawal Fees did not change as a result of the adoption of ASU 2014-09. Free Move Costs (prior to the adoption of ASU 2014-09) and Permanent Withdrawal Fees are collectively referred to as "Customer Inducements". If the customer terminates its relationship with us, the unamortized carrying value of the Customer Inducement intangible asset is charged to expense or revenue. However, in the event of such termination, we generally collect, and record as income, permanent removal fees that generally equal or exceed the amount of the unamortized Customer Inducement intangible asset. Data Center Our data center business features storage rental provided to the customer at contractually specified rates over a fixed contractual period and are accounted for under Accounting Standards Codification ("ASC") 840, Leases , and therefore, the majority of our revenues from our data center business are recognized on a straight-line basis. Revenues 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, technology escrow services that protect and manage source code, data backup and storage on our proprietary cloud 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 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 related sale of recycled paper, the price of which can fluctuate from period to period, and customer termination and permanent removal fees; (3) other services, including the scanning, imaging and document conversion services of active and inactive records and project revenues; (4) consulting services; and (5) cloud-related data protection, preservation, restoration and recovery. In May 2014, the Financial Accounting Standards Board ("FASB") issued ASU 2014-09. ASU 2014-09 provides guidance for management to reassess revenue recognition as it relates to: (1) transfer of control, (2) variable consideration, (3) allocation of transaction price based on relative standalone selling price, (4) licenses, (5) time value of money, and (6) contract costs. We adopted ASU 2014-09 as of January 1, 2018 using the modified retrospective method for all of our customer contracts, whereby the cumulative effect of applying ASU 2014-09 is recognized at the date of initial application. At January 1, 2018, we recognized the cumulative effect of initially applying ASU 2014-09 as an adjustment to the opening balance of (distributions in excess of earnings) earnings in excess of distributions, resulting in a decrease of $30,233 to stockholders' equity. The reduction of (distribution in excess of earnings) earnings in excess of distributions represents the net effect of (i) the write-off of Free Move Costs, net (which were capitalized and amortized prior to the adoption of ASU 2014-09) based upon the net book value of the Free Move Costs as of December 31, 2017, (ii) the recognition of certain Contract Fulfillment Costs, specifically Intake Costs (each as defined below) and commission assets, (iii) the recognition of deferred revenue associated with Intake Costs billed to our customers, and (iv) the deferred income tax impact of the aforementioned items. As we adopted ASU 2014-09 on a modified retrospective basis, the comparative Consolidated Balance Sheet as of December 31, 2017 and the comparative Consolidated Statements of Operations, Consolidated Statements of Comprehensive Income (Loss), Consolidated Statements of Equity and the Consolidated Statements of Cash Flows for the years ended December 31, 2016 and 2017 have not been restated to reflect the adoption of ASU 2014-09 and reflect our revenue policies in place at that time. Storage rental and service revenues are recognized in the month the respective storage rental or service is provided, and customers are generally billed on a monthly basis on contractually agreed-upon terms. Amounts related to future storage rental or prepaid service contracts for customers where storage rental fees or services are billed in advance are accounted for as deferred revenue and recognized ratably over the period the applicable storage rental or service is provided or performed. Revenues from the sales of products, which are included as a component of service revenues, are recognized when products are shipped and title has passed to the customer. Revenues from the sales of products, which represented less than 2% of consolidated revenue for the year ended December 31, 2018, have historically not been significant. The performance obligation is a series of distinct services (as determined for purposes of ASU 2014-09, a “series”) that have the same pattern of transfer to the customer that is satisfied over time. 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 are applying the "right to invoice" practical expedient to all revenues, with the exception of storage revenues in our data center business. For all of our businesses, with the exception of the storage component of our data center business, 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, which is consistent with the practical expedient described above. Our data center business features storage rental provided to the customer at contractually specified rates over a fixed contractual period. 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) Prior to the adoption of ASU 2014-09, intake costs incurred but not charged to a customer to transport records to our facilities (or Free Move Costs, as described in Note 2.i.), which include labor and transportation costs, were capitalized and amortized as a component of depreciation and amortization in our Consolidated Statements of Operations. The initial movement of customer records into physical storage must take place prior to initiation of the storage of records and is not considered a separate performance obligation and, therefore, the costs of the initial intake of customer records into physical storage (“Intake Costs”) represent a contract fulfillment cost for the storage of records as the earnings process does not commence until a customer’s records or other assets are in our possession. Accordingly, upon the adoption of ASU 2014-09, all Intake Costs, regardless of whether or not the services associated with such initial moves are billed to the customer or are provided to the customer at no charge, will be 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. Similarly, in instances where such Intake Costs are billed to the customer, the associated revenue will be deferred and recognized over the same three -year period. Commissions Prior to the adoption of ASU 2014-09, commissions we paid related to our long-term storage contracts were expensed as incurred. Upon the adoption of ASU 2014-09, 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.
Rent Normalization	Rent Normalization We have entered into various leases for buildings that expire over various terms. Certain leases have fixed escalation clauses (excluding those tied to the consumer price index or other inflation-based indices) or other features (including return to original condition, primarily in the United Kingdom) which require normalization of the rental expense over the life of the lease, resulting in deferred rent being reflected as a liability in the accompanying Consolidated Balance Sheets. In addition, we have assumed various above and below market leases in connection with certain of our acquisitions. The difference between the present value of these lease obligations and the market rate at the date of the acquisition was recorded as either a deferred rent liability (which is a component of Other long-term liabilities) or deferred rent asset (which is a component of Other within Other assets, net) in our Consolidated Balance Sheets and is being amortized to rent expense.
Stock-Based Compensation	Stock Options Under our various stock option plans, 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 options we issue become exercisable ratably over a period of either (i) three years from the date of grant and have a contractual life of ten years from the date of grant, unless the holder's employment is terminated sooner, or (ii) five years from the date of grant and have a contractual life of ten 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. Performance Units Under our various equity compensation plans, we may also make awards of PUs. For the majority of outstanding PUs, the number of PUs earned is determined based on our performance against predefined targets of revenue and return on invested capital ("ROIC") and, beginning with PUs granted in 2018, Adjusted EBITDA (as defined in Note 9). The number of PUs earned may range from 0% to 200% of the initial award. The number of PUs earned is determined based on our actual performance as compared to the targets at the end of a three -year performance period. Certain PUs that we grant will be earned based on a market condition associated with the total return on our common stock in relation to either (i) a subset of the Standard & Poor's 500 Index (for certain PUs granted prior to 2017), or (ii) the MSCI United States REIT Index (for certain PUs granted in 2017 and thereafter), rather than the revenue, ROIC and Adjusted EBITDA targets noted above. The number of PUs earned based on this market condition may range from 0% to 200% of the initial award. 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. PUs awarded to 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. We offer an ESPP in which participation is available to substantially all United States and Canadian employees who meet certain service eligibility requirements. The ESPP provides a way for our eligible employees to become stockholders on favorable terms. The ESPP provides for the purchase of our common stock by eligible employees through successive offering periods. We have historically had two six -month offering periods per year, the first of which generally runs from June 1 through November 30 and the second of which generally runs from December 1 through May 31. During each offering period, participating employees accumulate after-tax payroll contributions, up to a maximum of 15% of their compensation, to pay the purchase price at the end of the offering. Participating employees may withdraw from an offering before the purchase date and obtain a refund of the amounts withheld as payroll deductions. At the end of the offering period, outstanding options under the ESPP are exercised, and each employee's accumulated contributions are used to purchase our common stock. The price for shares purchased under the ESPP is 95% of the fair market price at the end of the offering period, without a look-back feature. As a result, we do not recognize compensation expense for the ESPP shares purchased. 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"). Under our various equity compensation plans, we may also grant RSUs. Our RSUs generally have a vesting period of three years from the date of grant. However, RSUs granted to our non-employee directors vest immediately upon grant. All RSUs accrue dividend equivalents associated with the underlying stock as we declare dividends. Dividends will generally be paid to holders of RSUs in cash upon the vesting date of the associated RSU and will be forfeited if the RSU does not vest. The fair value of RSUs is the excess of the market price of our common stock at the date of grant over the purchase price (which is typically zero). Expected volatility is calculated utilizing daily historical volatility over a period that equates to the expected life of the option. The risk-free interest rate was 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. 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. The expected life of the stock options granted is estimated using the historical exercise behavior of employees. We forecast the likelihood of achieving the predefined revenue, ROIC and Adjusted EBITDA targets for our PUs in order to calculate the expected PUs to be earned. We record a compensation charge based on either the forecasted PUs to be earned (during the performance period) or the actual PUs earned (at the three -year anniversary of the grant date) over the vesting period for each of the awards. The fair value of PUs based on our performance against revenue, ROIC and Adjusted EBITDA targets is the excess of the market price of our common stock at the date of grant over the purchase price (which is typically zero). For PUs earned based on a market condition, we utilize a Monte Carlo simulation to fair value these awards at the date of grant, and such fair value is expensed over the three-year performance period.
Income Taxes	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 (benefit) provision for income taxes in the accompanying Consolidated Statements of Operations.
Income (Loss) Per Share-Basic and Diluted	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.
Allowance for Doubtful Accounts and Credit Memo Reserves	We maintain an allowance for doubtful accounts and credit memos 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 consider 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 may be required. We write-off uncollectible balances as circumstances warrant, generally, no later than one year past due.
Concentrations of Credit Risk	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 total assets or in any one financial institution to a maximum of $50,000 . 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.
Fair Value Measurements	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. 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). Level 3—Unobservable inputs that reflect our assumptions about the assumptions that market participants would use in pricing the asset or liability.
Redeemable Noncontrolling Interests	Redeemable Noncontrolling Interests Certain unaffiliated third parties own noncontrolling interests in our consolidated subsidiaries in Chile, India and South Africa. 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.
New Accounting Pronouncements	New Accounting Pronouncements Recently Adopted Accounting Pronouncements In May 2014, the FASB issued ASU 2014-09. We adopted ASU 2014-09 on January 1, 2018 using the modified retrospective method. See Note 2.l. for information regarding the impact of the adoption of ASU 2014-09 on our consolidated financial statements. In January 2016, the FASB issued ASU No. 2016-01, Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities ("ASU 2016-01"). ASU 2016-01 requires that most equity investments be measured at fair value, with subsequent changes in fair value recognized in net income, while eliminating the available-for-sale classification for equity securities with readily determinable fair values and the cost method for equity investments without readily determinable fair values. ASU 2016-01 also impacts financial liabilities under the fair value option and the presentation and disclosure requirements for financial instruments. We adopted ASU 2016-01 on January 1, 2018. ASU 2016-01 did not have an impact on our consolidated financial statements. In August 2017, the FASB issued ASU No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities ("ASU 2017-12"). ASU 2017-12 amends the hedge accounting recognition and presentation requirements as outlined in Accounting Standards Codification Topic 815 with the objective of improving the financial reporting of hedging relationships to better portray the economic results of an entity’s risk management activities in its financial statements and enhance the transparency and understandability of hedge transactions. In addition, ASU 2017-12 simplifies the application of the hedge accounting guidance. We adopted ASU 2017-12 on January 1, 2018. ASU 2017-12 did not have a material impact on our consolidated financial statements. Other As Yet Adopted Accounting Pronouncements In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) as amended ("ASU 2016-02"). ASU 2016-02 will require lessees to recognize assets and liabilities on the balance sheet for the rights and obligations created by all leases. ASU 2016-02 also will require certain qualitative and quantitative disclosures designed to give financial statement users information on the amount, timing, and uncertainty of cash flows arising from leases. ASU 2016-02 was effective for us on January 1, 2019. ASU 2016-02 permits the use of a modified retrospective approach which requires an entity to recognize and measure leases existing at, or entered into after, either (1) the beginning of the earliest comparative period presented (“Option 1”) or (2) at the beginning of the period of adoption (“Option 2”). We will be electing Option 2, under which we will apply ASC 840, Leases (prior to the adoption of ASU 2016-02) to all comparative periods, including disclosures, and recognize the effects of applying ASU 2016-02 as a cumulative-effect adjustment to retained earnings as of January 1, 2019, the effective date of the standard. The transition guidance associated with ASU 2016-02 also permits certain practical expedients. We will elect the package of practical expedients permitted under the transition guidance which, among other things, allows us to carryforward the historical lease classification. We will also adopt an accounting policy election such that leases with an initial term of 12 months or less will not be included on our balance sheet. We will recognize those lease payments in the Consolidated Statements of Operations on a straight-line basis over the lease term. We are finalizing certain aspects of adopting ASU 2016-02, including finalizing our discount rates. ASU 2016-02 will have a material impact on our Consolidated Balance Sheets, but will not have a material impact on our Consolidated Statements of Operations. The most significant impact of the adoption of ASU 2016-02 is the recognition of additional right-of-use assets and lease liabilities for operating leases. We currently estimate the lease liabilities to be between $1,750,000 and $1,950,000 at January 1, 2019, the date of initial application, and the right-of-use assets to be approximately $100,000 less than the lease liabilities. The accounting for our existing capital leases remains substantially unchanged by the provisions of ASU 2016-02. We also expect to record an immaterial adjustment to our opening retained earnings balance as a result of certain build-to-suit leases that were accounted for as capital leases under the old standard but will be accounted for as operating leases under ASU 2016-02. In August 2018, the FASB issued ASU No. 2018-15, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (a consensus of the FASB Emerging Issues Task Force) ("ASU 2018-15"). ASU 2018-15 aligns the accounting for costs incurred to implement a cloud computing arrangement that is a service arrangement with the guidance on capitalizing costs associated with developing or obtaining internal-use software. ASU 2018-15 is effective for us on January 1, 2020, with early adoption permitted. We do not expect ASU 2018-15 will have a material impact on our consolidated financial statements.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
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): 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 capital leases in the respective category), at cost, consist of the following: December 31, 2017 2018 Land $ 314,897 $ 400,980 Buildings and building improvements 2,039,902 2,991,307 Leasehold improvements 592,700 770,666 Racking 1,996,594 2,001,831 Warehouse equipment/vehicles 467,345 481,515 Furniture and fixtures 55,245 56,207 Computer hardware and software 627,571 680,283 Construction in progress 156,846 218,160 $ 6,251,100 $ 7,600,949
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, 2017 is as follows: Carrying Value North American Records and Information Management(1) $ 2,269,446 North American Data Management(2) 497,851 Consumer Storage(3) — Fine Arts(3) 25,298 Entertainment Services(3) 34,750 Western Europe(4) 396,489 NEE and MEAI(5) 188,265 Latin America(5) 155,115 Australia and New Zealand(5) 316,883 Asia(5) 186,170 Global Data Center(6) — Total $ 4,070,267 _______________________________________________________________________________ (1) This reporting unit is included in the North American Records and Information Management Business segment. (2) This reporting unit is included in the North American Data Management Business segment. (3) This reporting unit is included in the Corporate and Other Business segment. (4) This reporting unit is included in the Western European Business segment. (5) This reporting unit is included in the Other International Business segment. (6) This reporting unit is included in the Global Data Center Business segment. The carrying value of goodwill, net for each of our reporting units described above as of December 31, 2018 is as follows: Carrying Value North American Records and Information Management(1) $ 2,251,795 North American Data Management(2) 493,491 Consumer Storage(3) — Fine Arts(3) 35,526 Entertainment Services(3) 34,233 Western Europe(4) 381,806 NEE and MEI(5) 169,780 Latin America(5) 136,099 ANZ SA(5) 300,204 Asia(5) 212,140 Global Data Center(6) 425,956 Total $ 4,441,030 _______________________________________________________________________________ (1) This reporting unit is included in the North American Records and Information Management Business segment. (2) This reporting unit is included in the North American Data Management Business segment. (3) This reporting unit is included in the Corporate and Other Business segment. (4) This reporting unit is included in the Western European Business segment. (5) This reporting unit is included in the Other International Business segment. (6) This reporting unit is included in the Global Data Center Business segment.
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, 2017 and 2018 is as follows: North American North American Western European Business Other International Business Global Data Center Business Corporate and Other Business Total Goodwill balance, net of accumulated amortization, as of December 31, 2016 $ 2,280,911 $ 493,966 $ 349,421 $ 743,077 $ — $ 37,646 $ 3,905,021 Deductible goodwill acquired during the year 894 — — 9,274 — 717 10,885 Non-deductible goodwill acquired during the year — — — 24,970 — 24,533 49,503 Goodwill impairment — — — — — (3,011 ) (3,011 ) Goodwill allocated to Russia and Ukraine Divestment (see Note 13) — — — (3,515 ) — — (3,515 ) Fair value and other adjustments(1) (25,195 ) 208 10,536 21,079 — — 6,628 Currency effects 12,836 3,677 36,532 51,548 — 163 104,756 Goodwill balance, net of accumulated amortization, as of December 31, 2017 2,269,446 497,851 396,489 846,433 — 60,048 4,070,267 Deductible goodwill acquired during the year — — — 3,251 — 6,644 9,895 Non-deductible goodwill acquired during the year — — 5,231 28,999 429,853 3,620 467,703 Goodwill allocated to IMFS Divestment (see Note 13) (1,202 ) — — — — — (1,202 ) Fair value and other adjustments(2) (423 ) — — 4,283 — 609 4,469 Currency effects (16,026 ) (4,360 ) (19,914 ) (64,743 ) (3,897 ) (1,162 ) (110,102 ) Goodwill balance, net of accumulated amortization, as of December 31, 2018 $ 2,251,795 $ 493,491 $ 381,806 $ 818,223 $ 425,956 $ 69,759 $ 4,441,030 Accumulated Goodwill Impairment Balance as of December 31, 2017 $ 85,909 $ — $ 46,500 $ — $ — $ 3,011 $ 135,420 Accumulated Goodwill Impairment Balance as of December 31, 2018 $ 85,909 $ — $ 46,500 $ — $ — $ 3,011 $ 135,420 ___________________________________________________________________ (1) Total fair value and other adjustments primarily include net adjustments of $6,628 primarily related to property, plant and equipment, and customer relationship intangible assets. (2) Total fair value and other adjustments primarily include net adjustments of $(2,717) primarily related to property, plant and equipment, customer relationship intangible assets and deferred income taxes and other liabilities and $7,186 of cash paid related to certain acquisitions completed in 2017.
Components of amortizable intangible assets	December 31, 2017 December 31, 2018 Gross Carrying Accumulated Net Carrying Gross Carrying Accumulated Net Carrying Other finite-lived intangible assets (included in other assets, net) $ 20,929 $ (10,728 ) $ 10,201 $ 20,310 $ (14,798 ) $ 5,512 The gross carrying amount and accumulated amortization of our finite-lived intangible assets as of December 31, 2017 and 2018, respectively, are as follows: December 31, 2017 December 31, 2018 Gross Carrying Accumulated Net Carrying Gross Carrying Accumulated Net Carrying Assets: Customer relationship intangible assets $ 1,704,105 $ (395,278 ) $ 1,308,827 $ 1,718,919 $ (455,705 ) $ 1,263,214 Customer inducements(1) 140,030 (66,981 ) 73,049 56,478 (34,181 ) 22,297 Data center lease-based intangible assets(2) 19,314 (643 ) 18,671 271,818 (50,807 ) 221,011 Third-party commissions asset(3) — — — 30,071 (1,089 ) 28,982 $ 1,863,449 $ (462,902 ) $ 1,400,547 $ 2,077,286 $ (541,782 ) $ 1,535,504 Liabilities: Data center below-market leases $ — $ — $ — $ 12,318 $ (1,642 ) $ 10,676 _______________________________________________________________________________ (1) The gross carrying amount, accumulated amortization and net carrying amount of customer inducements as of December 31, 2017 includes Free Move Costs, which were capitalized as Customer Inducements prior to the adoption of ASU 2014-09. Subsequent to the adoption of ASU 2014-09, Free Move Costs are considered Contract Fulfillment Costs and Customer Inducements consist exclusively of Permanent Withdrawal Fees. Contract Fulfillment Costs are included in Other, a component of Other assets, net, in the accompanying Consolidated Balance Sheet as of December 31, 2018. See Note 2.l. for information regarding Contract Fulfillment Costs included in our Consolidated Balance Sheet as of December 31, 2018. (2) Includes Data Center In-Place Leases, Data Center Tenant Relationships and Data Center Above-Market Leases. (3) Third-party commissions asset is included in Other, a component of Other assets, net in the accompanying Consolidated Balance Sheet as of December 31, 2018. See Note 6 for additional information on the third-party commissions asset.
Schedule of amortization expenses	Amortization expense associated with finite-lived intangible assets, revenue reduction associated with the amortization of Permanent Withdrawal Fees 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, 2016 , 2017 and 2018 are as follows: Year Ended December 31, 2016 2017 2018 Amortization expense included in depreciation and amortization associated with: Customer relationship and customer inducement intangible assets $ 84,349 $ 109,563 $ 113,782 Data center in-place leases and tenant relationships — — 43,061 Other finite-lived intangible assets 2,451 6,530 4,624 Third-party commissions asset — — 1,089 Revenue reduction associated with amortization of: Permanent withdrawal fees $ 12,217 $ 11,253 $ 11,408 Data center above-market leases and data center below-market leases — — 4,873
Estimated amortization expense for existing intangible assets for the next five succeeding fiscal years	Estimated amortization expense for existing finite-lived intangible assets (excluding deferred financing costs, as disclosed in Note 2.j. and Contract Fulfillment Costs, as defined and disclosed in Note 2.l.) is as follows: Estimated Amortization Included in Depreciation Revenue Reduction Associated with the Amortization of Permanent Withdrawal Fees Revenue Reduction (Increase) Associated with Amortization of Data Center Above-market leases and Below-market leases 2019 $ 160,048 $ 7,386 $ 4,332 2020 155,324 5,705 1,260 2021 151,546 3,792 676 2022 121,459 1,667 157 2023 118,586 1,192 (523 ) Thereafter 800,248 1,387 (3,902 )
Schedule of amortization of deferred financing costs	Estimated amortization expense for deferred financing costs, which are amortized as a component of interest expense, is as follows: Estimated Amortization of Deferred Financing Costs 2019 $ 15,544 2020 15,396 2021 14,272 2022 13,227 2023 10,108 Thereafter 18,060
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, 2017 2018 Interest $ 71,176 $ 83,854 Payroll and vacation 67,379 65,846 Incentive compensation 72,006 75,256 Sales tax and VAT payable 63,725 96,564 Dividend 172,102 181,986 Other 206,758 249,178 Accrued expenses $ 653,146 $ 752,684
Schedule of new accounting pronouncements and changes in accounting principles	Deferred revenue liabilities are reflected as follows in our Consolidated Balance Sheets: December 31, Description Balance Sheet Location 2017 2018 Deferred revenue - Current Deferred revenue $ 241,590 $ 264,823 Deferred revenue - Long-term Other Long-term Liabilities — 26,401 The Contract Fulfillment Costs recorded as a result of the adoption of ASU 2014-09 as of January 1, 2018 and December 31, 2018 are as follows: January 1, 2018 (Date of Adoption of December 31, 2018 Description Location in Balance Sheet Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Intake Costs asset Other (within Other Assets, Net) $ 31,604 $ (14,954 ) $ 16,650 $ 39,748 $ (24,504 ) 15,244 Commissions asset Other (within Other Assets, Net) 42,072 (21,173 ) 20,899 58,424 (34,637 ) 23,787 The following table presents certain components of our Consolidated Statements of Operations for the year ended December 31, 2018 as reported and as if we had not adopted ASU 2014-09 on January 1, 2018: Year Ended December 31, 2018 As Reported If ASU 2014-09 was not adopted Revenues $ 4,225,761 $ 4,219,663 Operating Income $ 755,508 $ 751,648 Income from Continuing Operations $ 376,976 $ 373,113 Per Share Income from Continuing Operations - Basic $ 1.31 $ 1.30 Per Share Income from Continuing Operations - Diluted $ 1.31 $ 1.30
Contract with customer, future amortization expense	Estimated amortization expense for Contract Fulfillment Costs is as follows: Estimated Amortization 2019 $ 21,227 2020 12,526 2021 5,278
Schedule of future minimum rental payments for operating leases	The future minimum lease payments to be received 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: Future minimum lease payments 2019 $ 178,196 2020 138,216 2021 92,724 2022 71,784 2023 57,882
Stock-based compensation expense for Employee Stock-Based Awards related to continuing operations	Stock-based compensation expense for Employee Stock-Based Awards included in the accompanying Consolidated Statements of Operations is as follows: Year Ended December 31, 2016 2017 2018 Cost of sales (excluding depreciation and amortization) $ 110 $ 108 $ 119 Selling, general and administrative expenses 28,866 29,911 31,048 Total stock-based compensation $ 28,976 $ 30,019 $ 31,167
Schedule of weighted average assumptions	. The weighted average assumptions used for grants in the year ended December 31: Weighted Average Assumptions 2016 2017 2018 Expected volatility 27.2 % 25.7 % 25.4 % Risk-free interest rate 1.32 % 1.96 % 2.65 % Expected dividend yield 7 % 6 % 7 % Expected life 5.6 years 5.0 years 5.0 years
Summary of stock option activity	A summary of our stock options outstanding as of December 31, 2018 by vesting terms is as follows: December 31, 2018 Stock Options Outstanding % of Three-year vesting period (10 year contractual life) 3,965,018 92.8 % Five-year vesting period (10 year contractual life) 306,816 7.2 % 4,271,834 100.0 % A summary of stock option activity for the year ended December 31, 2018 is as follows: Options Weighted Average Exercise Price Weighted Average Remaining Contractual Term (Years) Aggregate Intrinsic Value Outstanding at December 31, 2017 3,671,740 $ 34.41 Granted 846,517 33.71 Exercised (182,607 ) 22.36 Forfeited (47,754 ) 34.69 Expired (16,062 ) 34.69 Outstanding at December 31, 2018 4,271,834 $ 34.78 7.03 $ 6,066 Options exercisable at December 31, 2018 2,393,010 $ 34.51 5.97 $ 5,785 Options expected to vest 1,808,321 $ 35.10 8.36 $ 279
Aggregate intrinsic value of stock options exercised	The aggregate intrinsic value of stock options exercised for the years ended December 31, 2016 , 2017 and 2018 is as follows: Year Ended December 31, 2016 2017 2018 Aggregate intrinsic value of stock options exercised $ 18,298 $ 8,485 $ 2,181
Summary of restricted stock and RSU activity	Cash dividends accrued and paid on RSUs for the years ended December 31, 2016 , 2017 and 2018 , are as follows: Year Ended December 31, 2016 2017 2018 Cash dividends accrued on RSUs $ 2,525 $ 2,590 $ 2,899 Cash dividends paid on RSUs 2,363 2,370 2,477 Year Ended December 31, 2016 2017 2018 Fair value of RSUs vested $ 22,236 $ 19,825 $ 20,454 A summary of RSU activity for the year ended December 31, 2018 is as follows: RSUs Weighted- Non-vested at December 31, 2017 1,071,469 $ 35.38 Granted 814,659 33.59 Vested (582,687 ) 35.10 Forfeited (106,875 ) 34.92 Non-vested at December 31, 2018 1,196,566 $ 34.33
Schedule of performance units	The fair value of earned PUs that vested during the years ended December 31, 2016 , 2017 and 2018 , is as follows: Year Ended December 31, 2016 2017 2018 Fair value of earned PUs that vested $ 5,748 $ 1,242 $ 3,117 Cash dividends accrued and paid on PUs for the years ended December 31, 2016 , 2017 and 2018 , are as follows: Year Ended December 31, 2016 2017 2018 Cash dividends accrued on PUs $ 1,078 $ 1,290 $ 1,804 Cash dividends paid on PUs 645 205 644
Summary of performance unit (PU) activity	A summary of PU activity for the year ended December 31, 2018 is as follows: Original PU Adjustment(1) Total Weighted- Non-vested at December 31, 2017 717,878 (250,067 ) 467,811 $ 39.28 Granted 353,507 — 353,507 33.64 Vested (81,305 ) — (81,305 ) 38.34 Forfeited/Performance or Market Conditions Not Achieved (23,031 ) (49,881 ) (72,912 ) 38.01 Non-vested at December 31, 2018 967,049 (299,948 ) 667,101 $ 36.54 _______________________________________________________________________________ (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.
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, 2016 , 2017 and 2018 is as follows: Year Ended December 31, 2016 2017 2018 Income (loss) from continuing operations $ 103,880 $ 191,723 $ 376,976 Less: Net income (loss) attributable to noncontrolling interests 2,409 1,611 1,198 Income (loss) from continuing operations (utilized in numerator of Earnings Per Share calculation) $ 101,471 $ 190,112 $ 375,778 Income (loss) from discontinued operations, net of tax 3,353 (6,291 ) (12,427 ) Net income (loss) attributable to Iron Mountain Incorporated $ 104,824 $ 183,821 $ 363,351 Weighted-average shares—basic 246,178,000 265,898,000 285,913,000 Effect of dilutive potential stock options 574,954 431,071 234,558 Effect of dilutive potential RSUs and PUs 514,044 509,235 505,030 Effect of Over-Allotment Option(1) — 6,278 — Weighted-average shares—diluted 247,266,998 266,844,584 286,652,588 Earnings (losses) per share—basic: Income (loss) from continuing operations $ 0.41 $ 0.71 $ 1.31 Income (loss) from discontinued operations, net of tax 0.01 (0.02 ) (0.04 ) Net income (loss) attributable to Iron Mountain Incorporated(2) $ 0.43 $ 0.69 $ 1.27 Earnings (losses) per share—diluted: Income (loss) from continuing operations $ 0.41 $ 0.71 $ 1.31 Income (loss) from discontinued operations, net of tax 0.01 (0.02 ) (0.04 ) Net income (loss) attributable to Iron Mountain Incorporated(2) $ 0.42 $ 0.69 $ 1.27 Antidilutive stock options, RSUs and PUs, excluded from the calculation 1,790,362 2,326,344 3,258,078 ___________________________________________________________________ (1) See Note 12. (2) Columns may not foot due to rounding.
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 Credit Memos Allowance for Other(1) Deductions(2) Balance at 2016 $ 31,447 $ 37,616 $ 8,705 $ 16,528 $ (50,006 ) $ 44,290 2017 44,290 38,966 14,826 1,905 (53,339 ) 46,648 2018 46,648 36,329 18,625 (1,568 ) (56,450 ) 43,584 _______________________________________________________________________________ (1) Primarily consists of recoveries of previously written-off accounts receivable, allowances of businesses acquired (primarily Recall in 2016) and the impact associated with currency translation adjustments. (2) Primarily consists of the issuance of credit memos and the write-off of accounts receivable.
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, 2017 and 2018 , respectively, are as follows: Fair Value Measurements at December 31, 2017 Using Description Total Carrying Quoted prices Significant other Significant Money Market Funds(1) $ 585,000 $ — $ 585,000 $ — Time Deposits(1) 24,482 — 24,482 — Trading Securities 11,784 11,279 (2) 505 (3) — Derivative Assets(4) 1,579 — 1,579 — Derivative Liabilities(4) 2,329 — 2,329 — Fair Value Measurements at Description Total Carrying Quoted prices Significant other Significant Time Deposits(1) $ 956 $ — $ 956 $ — Trading Securities 10,753 10,248 (2) 505 (3) — Derivative Assets(4) 93 — 93 — Interest Rate Swap Agreements Liabilities(5) 973 — 973 — _____________________________________________________________ (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. (4) Derivative assets and liabilities relate to short-term (six months or less) foreign currency contracts that we have entered into to hedge certain of our foreign exchange intercompany exposures, as more fully disclosed at Note 3. We calculate the value of such forward contracts by adjusting the spot rate utilized at the balance sheet date for translation purposes by an estimate of the forward points observed in active markets. (5) We have entered into interest rate swap agreements to hedge certain of our interest rate exposures, as more fully disclosed in Note 3. The interest rate swap agreements are designated as cash flow hedges and 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, 2016 , 2017 and 2018 are as follows: Foreign Currency Market Value Fair Value Adjustments for Interest Rate Swap Agreements Total Balance as of December 31, 2015 $ (175,651 ) $ 734 $ — $ (174,917 ) Other comprehensive (loss) income: Foreign currency translation adjustment (36,922 ) — — (36,922 ) Market value adjustments for securities — (734 ) — (734 ) Total other comprehensive (loss) income (36,922 ) (734 ) — (37,656 ) Balance as of December 31, 2016 $ (212,573 ) $ — — $ (212,573 ) Other comprehensive (loss) income: Foreign currency translation adjustment(1) 108,584 — — 108,584 Total other comprehensive (loss) income 108,584 — — 108,584 Balance as of December 31, 2017 $ (103,989 ) $ — — $ (103,989 ) Other comprehensive (loss) income: Foreign currency translation adjustment (160,702 ) — — (160,702 ) Fair value adjustments for interest rate swap agreements — — (973 ) (973 ) Total other comprehensive (loss) income (160,702 ) — (973 ) (161,675 ) Balance as of December 31, 2018 $ (264,691 ) $ — $ (973 ) $ (265,664 ) ______________________________________________________________ (1) During the year ended December 31, 2017, approximately $29,100 of cumulative translation adjustment associated with our businesses in Russia and Ukraine was reclassified from accumulated other comprehensive items, net and was included in the gain on sale associated with the Russia and Ukraine Divestment (see Note 13).
Other expense (income), net	Other expense (income), net consists of the following: Year Ended December 31, 2016 2017 2018 Foreign currency transaction losses (gains), net(1) $ 20,413 $ 43,248 $ (15,567 ) Debt extinguishment expense, net 9,283 78,368 — Other, net(2) 14,604 (42,187 ) 3,875 $ 44,300 $ 79,429 $ (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) our Euro Notes (as defined in Note 4), (ii) borrowings in certain foreign currencies under our Revolving Credit Facility and our Former Revolving Credit Facility (each as defined in Note 4), (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 3). (2) Other, net for the year ended December 31, 2016 includes a charge of $15,417 associated with the loss on disposal of the Australia Divestment Business (as defined in Note 6) and a charge of $1,421 associated with the loss on disposal of the Iron Mountain Canadian Divestments (as defined in Note 6). Other, net for the year ended December 31, 2017 includes a gain of $38,869 associated with the Russia and Ukraine Divestment (as defined in Note 13).

Derivative Instruments and He_2

Derivative Instruments and Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Fair Value of Derivative Instruments Not Designated As Hedging Instruments	The following table provides the fair value of our derivative instruments not designated as hedging instruments as of December 31, 2017 and 2018: Derivatives Not Designated as Hedging Instruments Balance Sheet Location December 31, 2017 December 31, 2018 Derivative assets Prepaid expenses and other $ 1,579 $ 93 Derivative liabilities Accrued expenses 2,329 —
Schedule of Net Cash (Receipts) Payments Included in Cash From Operacting Activities Related to Settlements	Net cash (receipts) payments included in cash from operating activities related to settlements associated with foreign currency forward contracts for the years ended December 31, 2016 , 2017 and 2018 , are as follows: Year Ended December 31, 2016 2017 2018 Net (receipts) payments $ — $ (9,073 ) $ 5,797
Schedule of (Gains) Losses For Derivative Instruments	(Gains) losses for our derivative instruments for the years ended December 31, 2016, 2017 and 2018 are as follows: Amount of (Gain) Loss Recognized in Income on Derivatives December 31, Derivatives Not Designated as Hedging Instruments Location of Loss (Gain) Recognized in Income on Derivative 2016 2017 2018 Foreign exchange contracts Other expense (income), net $ — $ (8,292 ) $ 4,954
Schedule of Net Investment Hedges in Accumulated Other Comprehensive Income (Loss) [Table Text Block]	As a result, we recorded the following foreign exchange gains (losses) related to the change in fair value of such debt due to the currency translation adjustments, which is a component of accumulated other comprehensive items, net: Year Ended December 31, 2016 2017 2018 Foreign exchange gains (losses) $ 1,107 $ (15,015 ) $ 11,070

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Schedule of carrying amount and fair value of long-term debt instruments	Long-term debt is as follows: December 31, 2017 December 31, 2018 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) 466,593 (14,407 ) 452,186 466,593 793,832 (14,117 ) 779,715 793,832 Term Loan A(1) 243,750 — 243,750 243,750 240,625 — 240,625 240,625 Term Loan B(1)(2) — — — — 693,169 (8,742 ) 684,427 660,013 Australian Dollar Term Loan (the "AUD Term Loan")(3)(4) 187,504 (3,382 ) 184,122 189,049 233,955 (3,084 ) 230,871 235,645 UK Bilateral Revolving Credit Facility ("UK Bilateral Facility")(4) — — — — 178,299 (2,357 ) 175,942 178,299 4 3 / 8 % Senior Notes due 2021 (the "4 3 / 8 % Notes")(5)(6)(7) 500,000 (5,874 ) 494,126 507,500 500,000 (4,155 ) 495,845 488,750 6% Senior Notes due 2023 (the "6% Notes due 2023")(5)(6) 600,000 (6,224 ) 593,776 625,500 600,000 (5,126 ) 594,874 606,000 5 3 / 8 % CAD Senior Notes due 2023 (the "CAD Notes due 2023")(5)(7)(8) 199,171 (3,295 ) 195,876 208,631 183,403 (2,506 ) 180,897 186,154 5 3 / 4 % Senior Subordinated Notes due 2024 (the "5 3 / 4 % Notes")(5)(6) 1,000,000 (9,156 ) 990,844 1,012,500 1,000,000 (7,782 ) 992,218 940,000 3% Euro Senior Notes due 2025 (the "Euro Notes")(5)(6)(7) 359,386 (4,691 ) 354,695 364,776 343,347 (4,098 ) 339,249 321,029 3 7 / 8 % GBP Senior Notes due 2025 (the "GBP Notes due 2025")(5)(7)(9) 539,702 (7,718 ) 531,984 527,559 509,425 (6,573 ) 502,852 453,811 5 3 / 8 % Senior Notes due 2026 (the "5 3 / 8 % Notes")(5)(7)(10) 250,000 (3,615 ) 246,385 256,875 250,000 (3,185 ) 246,815 224,375 4 7 / 8 % Senior Notes due 2027 (the "4 7 / 8 % Notes")(5)(6)(7) 1,000,000 (13,866 ) 986,134 1,000,000 1,000,000 (12,442 ) 987,558 855,000 5 1 / 4 % Senior Notes due 2028 (the "5 1 / 4 % Notes")(5)(6)(7) 825,000 (11,817 ) 813,183 826,031 825,000 (10,923 ) 814,077 713,625 Real Estate Mortgages, Capital Leases and Other(11) 649,432 (566 ) 648,866 649,432 606,702 (171 ) 606,531 606,702 Accounts Receivable Securitization Program(12) 258,973 (356 ) 258,617 258,973 221,673 (218 ) 221,455 221,673 Mortgage Securitization Program(13) 50,000 (1,273 ) 48,727 50,000 50,000 (1,128 ) 48,872 50,000 Total Long-term Debt 7,129,511 (86,240 ) 7,043,271 8,229,430 (86,607 ) 8,142,823 Less Current Portion (146,300 ) — (146,300 ) (126,406 ) — (126,406 ) Long-term Debt, Net of Current Portion $ 6,983,211 $ (86,240 ) $ 6,896,971 $ 8,103,024 $ (86,607 ) $ 8,016,417 ______________________________________________________________ (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.s.) 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, 2017 and 2018, respectively. (2) The amount of debt for the Term Loan B (as defined below) reflects an unamortized original issue discount of $1,581 as of December 31, 2018. (3) The amount of debt for the AUD Term Loan reflects an unamortized original issue discount of $ 1,545 and $1,690 as of December 31, 2017 and 2018, respectively. (4) The fair value (Level 3 of fair value hierarchy described at Note 2.s.) 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.s.) of these debt instruments are based on quoted market prices for these notes on December 31, 2017 and 2018 , respectively. (6) Collectively, the "Parent Notes". IMI is the direct obligor on the Parent Notes, which are fully and unconditionally guaranteed, on a senior or senior subordinated basis, as the case may be, 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. See Note 5. (7) The 4 3 / 8 % Notes, the CAD Notes due 2023, the Euro Notes, the GBP Notes due 2025, the 5 3 / 8 % Notes, the 4 7 / 8 % Notes and the 5 1 / 4 % Notes (collectively, 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 is the direct obligor on the CAD Notes due 2023, 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. See Note 5. (9) Iron Mountain (UK) PLC ("IM UK") is the direct obligor on the GBP Notes due 2025, 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. See Note 5. (10) Iron Mountain US Holdings, Inc. ("IM US Holdings"), one of the Guarantors, is the direct obligor on the 5 3 / 8 % Notes, which are fully and unconditionally guaranteed, on a senior basis, by IMI and the other Guarantors. These guarantees are joint and several obligations of IMI and such Guarantors. See Note 5. (11) Includes (i) real estate mortgages of $20,183 and $18,576 as of December 31, 2017 and 2018 , respectively, which bear interest at approximately 4.3% as of December 31, 2017 and 4.1% as of December 31, 2018 and are payable in various installments through 2021, (ii) capital lease obligations of $436,285 and $447,173 as of December 31, 2017 and 2018 , respectively, which bear a weighted average interest rate of 4.9% at December 31, 2017 and 5.7% at December 31, 2018 , and (iii) other notes and other obligations, which were assumed by us as a result of certain acquisitions, of $192,964 and $140,953 as of December 31, 2017 and 2018 , respectively, and bear a weighted average interest rate of 11.2% at December 31, 2017 and 11.1% at December 31, 2018 , respectively. We believe the fair value (Level 3 of fair value hierarchy described at Note 2.s.) of this debt approximates its carrying value. (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.s.) of this debt approximates its carrying value. (13) The Mortgage Securitization Special Purpose Subsidiary is the obligor under this program. We believe the fair value (Level 3 of fair value hierarchy described at Note 2.s.) of this debt approximates its carrying value.
Schedule of redemption dates and prices of the senior or senior subordinated notes	The following table presents the various redemption dates and prices of the senior or senior subordinated notes. The redemption dates reflect the date at or after which the notes may be redeemed at our option at a premium redemption price. After these dates, the notes may be redeemed at 100% of face value: Redemption Date 4 3 / 8 % Notes June 1, 6% Notes due 2023 August 15, CAD Notes due 2023 5 3 / 4 % Notes August 15, Euro Notes January 15, GBP Notes due 2025 November 15, 5 3 / 8 % Notes June 1, 4 7 / 8 % Notes 5 1 / 4 % Notes 2019 101.094 % (1) 102.000 % (1) 104.031 % (1) 100.958 % (1) — — — — — 2020 100.000 % 101.000 % 102.688 % 100.000 % 101.500 % (1) 101.938 % (1) — — — 2021 100.000 % 100.000 % 101.344 % 100.000 % 100.750 % 100.969 % 102.688 % (1) — — 2022 — 100.000 % 100.000 % 100.000 % 100.000 % 100.000 % 101.792 % 102.438 % (1) 102.625 % (1) 2023 — 100.000 % 100.000 % 100.000 % 100.000 % 100.000 % 100.896 % 101.625 % 101.750 % 2024 — — — 100.000 % 100.000 % 100.000 % 100.000 % 100.813 % 100.875 % 2025 — — — — 100.000 % 100.000 % 100.000 % 100.000 % 100.000 % 2026 — — — — — — 100.000 % 100.000 % 100.000 % 2027 — — — — — — — 100.000 % 100.000 % 2028 — — — — — — — — 100.000 % _______________________________________________________________________________ (1) Prior to this date, the relevant notes are redeemable, at our option, in whole or in part, at a specified redemption price or make-whole price, as the case may be.
Schedule of maturities of long-term debt	Maturities of long-term debt (gross of discounts) are as follows: Year Amount 2019 $ 126,406 2020 381,741 2021 583,759 2022 447,153 2023 1,800,128 Thereafter 4,893,514 8,232,701 Net Discounts (3,271 ) Net Deferred Financing Costs (86,607 ) Total Long-term Debt (including current portion) $ 8,142,823
Schedule of leverage and fixed charge ratios	Our leverage and fixed charge coverage ratios under the Credit Agreement as of December 31, 2017 and 2018, as well as our leverage ratio under our indentures as of December 31, 2017 and 2018 are as follows: December 31, 2017 December 31, 2018 Maximum/Minimum Allowable Net total lease adjusted leverage ratio 5.0 5.6 Maximum allowable of 6.5 Net secured debt lease adjusted leverage ratio 1.6 2.6 Maximum allowable of 4.0 Bond leverage ratio (not lease adjusted) 5.8 5.8 Maximum allowable of 6.5-7.0(1)(2) Fixed charge coverage ratio 2.1 2.2 Minimum allowable of 1.5 ______________________________________________________________ (1) The maximum allowable leverage ratio under our indentures for the 4 7 / 8 % Notes, the GBP Notes due 2025 and the 5 1 / 4 % Notes is 7.0 , while the maximum allowable leverage ratio under the indentures pertaining to our remaining senior and senior subordinated notes is 6.5 . In certain instances as provided in our indentures, we have the ability to incur additional indebtedness that would result in our bond leverage ratio exceeding the maximum allowable ratio under our indentures and still remain in compliance with the covenant. (2) At December 31, 2017, a portion of the net proceeds from the 5 1 / 4 % Notes, together with a portion of the net proceeds of the Equity Offering (as defined in Note 12), were used to temporarily repay approximately $807,000 of outstanding indebtedness under our Revolving Credit Facility until the closing of the IODC Transaction, which occurred on January 10, 2018 (as described in Note 6). The bond leverage ratio at December 31, 2017 is calculated based on our outstanding indebtedness at this date, which reflects the temporary payment of the Revolving Credit Facility.

Selected Consolidated Financi_2

Selected Consolidated Financial Statements of Parent, Guarantors, Canada Company and Non-Guarantors (Tables)	12 Months Ended
	Dec. 31, 2018
Selected Consolidated Financial Statements of Parent, Guarantors, Canada Company and Non-Guarantors
Schedule of Selected Consolidated Balance Sheets of Parent, Guarantors, Canada Company and Non-Guarantors	CONSOLIDATED BALANCE SHEETS December 31, 2017 Parent Guarantors Non- Guarantors Eliminations Consolidated Assets Current Assets: Cash and cash equivalents(1) $ 2,433 $ 634,317 $ 383,675 $ (94,726 ) $ 925,699 Accounts receivable — 32,972 802,770 — 835,742 Intercompany receivable 332,293 149,731 — (482,024 ) — Prepaid expenses and other 1,579 103,643 83,681 (29 ) 188,874 Total Current Assets 336,305 920,663 1,270,126 (576,779 ) 1,950,315 Property, Plant and Equipment, Net 316 2,030,875 1,386,488 — 3,417,679 Other Assets, Net: Long-term notes receivable from affiliates and intercompany receivable 4,578,995 — — (4,578,995 ) — Investment in subsidiaries 1,858,045 885,999 — (2,744,044 ) — Goodwill — 2,577,310 1,492,957 — 4,070,267 Other — 796,913 737,228 — 1,534,141 Total Other Assets, Net 6,437,040 4,260,222 2,230,185 (7,323,039 ) 5,604,408 Total Assets $ 6,773,661 $ 7,211,760 $ 4,886,799 $ (7,899,818 ) $ 10,972,402 Liabilities and Equity Intercompany Payable $ — $ — $ 482,024 $ (482,024 ) $ — Debit Balances Under Cash Pool — 56,233 38,493 (94,726 ) — Current Portion of Long-term Debt — 54,247 92,082 (29 ) 146,300 Total Other Current Liabilities 235,062 527,549 421,262 — 1,183,873 Long-term Debt, Net of Current Portion 4,232,759 758,166 1,906,046 — 6,896,971 Long-term Notes Payable to Affiliates and Intercompany Payable — 4,578,995 — (4,578,995 ) — Other Long-term Liabilities — 113,024 241,974 — 354,998 Commitments and Contingencies (see Note 10) Redeemable Noncontrolling Interests (see Note 2.v.) 8,402 — 83,016 — 91,418 Total Iron Mountain Incorporated Stockholders' Equity 2,297,438 1,123,546 1,620,498 (2,744,044 ) 2,297,438 Noncontrolling Interests — — 1,404 — 1,404 Total Equity 2,297,438 1,123,546 1,621,902 (2,744,044 ) 2,298,842 Total Liabilities and Equity $ 6,773,661 $ 7,211,760 $ 4,886,799 $ (7,899,818 ) $ 10,972,402 ______________________________________________________________ (1) Included within Cash and Cash Equivalents at December 31, 2017 is approximately $38,400 and $62,000 of cash on deposit associated with our Cash Pools for the Guarantors and Non-Guarantors, respectively. See Note 4 for more information on our Cash Pools. CONSOLIDATED BALANCE SHEETS (Continued) December 31, 2018 Parent Guarantors Non- Guarantors Eliminations Consolidated Assets Current Assets: Cash and cash equivalents(1) $ 132 $ 61,650 $ 169,318 $ (65,615 ) $ 165,485 Accounts receivable — 47,900 798,989 — 846,889 Intercompany receivable — 818,463 — (818,463 ) — Prepaid expenses and other 93 108,879 86,797 (29 ) 195,740 Total Current Assets 225 1,036,892 1,055,104 (884,107 ) 1,208,114 Property, Plant and Equipment, Net 190 3,002,104 1,487,263 — 4,489,557 Other Assets, Net: Long-term notes receivable from affiliates and intercompany receivable 4,954,686 — — (4,954,686 ) — Investment in subsidiaries 1,885,174 1,006,144 — (2,891,318 ) — Goodwill — 2,858,539 1,582,491 — 4,441,030 Other — 979,483 734,063 — 1,713,546 Total Other Assets, Net 6,839,860 4,844,166 2,316,554 (7,846,004 ) 6,154,576 Total Assets $ 6,840,275 $ 8,883,162 $ 4,858,921 $ (8,730,111 ) $ 11,852,247 Liabilities and Equity Intercompany Payable $ 462,927 $ — $ 355,536 $ (818,463 ) $ — Debit Balances Under Cash Pools — 10,612 55,003 (65,615 ) — Current Portion of Long-term Debt — 63,703 62,732 (29 ) 126,406 Total Other Current Liabilities 268,373 616,826 451,073 — 1,336,272 Long-term Debt, Net of Current Portion 4,223,822 1,877,649 1,914,946 — 8,016,417 Long-term Notes Payable to Affiliates and Intercompany Payable — 4,954,686 — (4,954,686 ) — Other Long-term Liabilities 973 115,994 300,064 — 417,031 Commitments and Contingencies (see Note 10) Redeemable Noncontrolling Interests (see Note 2.v.) — — 70,532 — 70,532 Total Iron Mountain Incorporated Stockholders' Equity 1,884,180 1,243,692 1,647,626 (2,891,318 ) 1,884,180 Noncontrolling Interests — — 1,409 — 1,409 Total Equity 1,884,180 1,243,692 1,649,035 (2,891,318 ) 1,885,589 Total Liabilities and Equity $ 6,840,275 $ 8,883,162 $ 4,858,921 $ (8,730,111 ) $ 11,852,247 ______________________________________________________________ (1) Included within Cash and Cash Equivalents at December 31, 2018 is approximately $57,200 and $12,700 of cash on deposit associated with our Cash Pools for the Guarantors and Non-Guarantors, respectively. See Note 4 for more information on our Cash Pools.
Schedule of Selected Consolidated Statements of Operations of Parent, Guarantors, Canada Company and Non-Guarantors	CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) Year Ended December 31, 2016 Parent Guarantors Canada Company Non- Guarantors Eliminations Consolidated Revenues: Storage rental $ — $ 1,341,840 $ 125,335 $ 675,730 $ — $ 2,142,905 Service — 822,515 64,147 481,886 — 1,368,548 Intercompany revenues — 3,994 — 80,788 (84,782 ) — Total Revenues — 2,168,349 189,482 1,238,404 (84,782 ) 3,511,453 Operating Expenses: Cost of sales (excluding depreciation and amortization) — 895,595 29,418 642,764 — 1,567,777 Intercompany cost of sales — 17,496 63,292 3,994 (84,782 ) — Selling, general and administrative 668 668,975 17,786 300,903 — 988,332 Depreciation and amortization 179 272,831 15,480 163,836 — 452,326 Loss (Gain) on disposal/write-down of property, plant and equipment (excluding real estate), net — 1,328 310 (226 ) — 1,412 Total Operating Expenses 847 1,856,225 126,286 1,111,271 (84,782 ) 3,009,847 Operating (Loss) Income (847 ) 312,124 63,196 127,133 — 501,606 Interest Expense (Income), Net 110,659 (7,741 ) 40,546 167,198 — 310,662 Other Expense (Income), Net 71,335 (13,247 ) 10,341 (24,129 ) — 44,300 (Loss) Income from Continuing Operations Before (Benefit) Provision for Income Taxes and Gain on Sale of Real Estate (182,841 ) 333,112 12,309 (15,936 ) — 146,644 Provision (Benefit) for Income Taxes — 30,860 7,354 6,730 — 44,944 Gain on Sale of Real Estate, Net of Tax — (2,121 ) (59 ) — — (2,180 ) Equity in the (Earnings) Losses of Subsidiaries, Net of Tax (287,665 ) (22,662 ) (5,040 ) (6,832 ) 322,199 — Net Income (Loss) 104,824 327,035 10,054 (15,834 ) (322,199 ) 103,880 Income (Loss) from Discontinued Operations, Net of Tax — 1,642 1,818 (107 ) — 3,353 Net Income (Loss) 104,824 328,677 11,872 (15,941 ) (322,199 ) 107,233 Less: Net Income (Loss) Attributable to Noncontrolling Interests — — — 2,409 — 2,409 Net Income (Loss) Attributable to Iron Mountain Incorporated $ 104,824 $ 328,677 $ 11,872 $ (18,350 ) $ (322,199 ) $ 104,824 Net Income (Loss) $ 104,824 $ 328,677 $ 11,872 $ (15,941 ) $ (322,199 ) $ 107,233 Other Comprehensive Income (Loss): Foreign Currency Translation Adjustment 1,107 — (6,123 ) (30,625 ) — (35,641 ) Market Value Adjustments for Securities — (734 ) — — — (734 ) Equity in Other Comprehensive (Loss) Income of Subsidiaries (38,763 ) (3,164 ) (679 ) (6,123 ) 48,729 — Total Other Comprehensive (Loss) Income (37,656 ) (3,898 ) (6,802 ) (36,748 ) 48,729 (36,375 ) Comprehensive Income (Loss) 67,168 324,779 5,070 (52,689 ) (273,470 ) 70,858 Comprehensive Income (Loss) Attributable to Noncontrolling Interests — — — 3,690 — 3,690 Comprehensive Income (Loss) Attributable to Iron Mountain Incorporated $ 67,168 $ 324,779 $ 5,070 $ (56,379 ) $ (273,470 ) $ 67,168 CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (Continued) Year Ended December 31, 2017 Parent Guarantors Non- Guarantors Eliminations Consolidated Revenues: Storage rental $ — $ 1,437,466 $ 940,091 $ — $ 2,377,557 Service — 863,623 604,398 — 1,468,021 Intercompany revenues — 4,577 24,613 (29,190 ) — Total Revenues — 2,305,666 1,569,102 (29,190 ) 3,845,578 Operating Expenses: Cost of sales (excluding depreciation and amortization) — 925,385 759,933 — 1,685,318 Intercompany cost of sales — 24,613 4,577 (29,190 ) — Selling, general and administrative 161 654,213 330,591 — 984,965 Depreciation and amortization 167 309,883 212,326 — 522,376 Intangible impairments — 3,011 — — 3,011 (Gain) Loss on disposal/write-down of property, plant and equipment (excluding real estate), net — (999 ) 1,798 — 799 Total Operating Expenses 328 1,916,106 1,309,225 (29,190 ) 3,196,469 Operating (Loss) Income (328 ) 389,560 259,877 — 649,109 Interest Expense (Income), Net 163,541 6,996 183,038 — 353,575 Other Expense (Income), Net 47,176 9,112 23,141 — 79,429 (Loss) Income from Continuing Operations Before Provision (Benefit) for Income Taxes and Gain on Sale of Real Estate (211,045 ) 373,452 53,698 — 216,105 Provision (Benefit) for Income Taxes — 5,854 20,093 — 25,947 Gain on Sale of Real Estate, Net of Tax — — (1,565 ) — (1,565 ) Equity in the (Earnings) Losses of Subsidiaries, Net of Tax (394,866 ) (25,385 ) — 420,251 — (Loss) Income from Continuing Operations 183,821 392,983 35,170 (420,251 ) 191,723 (Loss) Income from Discontinued Operations, Net of Tax — (4,370 ) (1,921 ) — (6,291 ) Net Income (Loss) 183,821 388,613 33,249 (420,251 ) 185,432 Less: Net Income (Loss) Attributable to Noncontrolling Interests — — 1,611 — 1,611 Net Income (Loss) Attributable to Iron Mountain Incorporated $ 183,821 $ 388,613 $ 31,638 $ (420,251 ) $ 183,821 Net Income (Loss) $ 183,821 $ 388,613 $ 33,249 $ (420,251 ) $ 185,432 Other Comprehensive Income (Loss): Foreign Currency Translation Adjustment (15,015 ) — 123,579 — 108,564 Equity in Other Comprehensive Income (Loss) of Subsidiaries 123,599 82,127 — (205,726 ) — Total Other Comprehensive Income (Loss) 108,584 82,127 123,579 (205,726 ) 108,564 Comprehensive Income (Loss) 292,405 470,740 156,828 (625,977 ) 293,996 Comprehensive Income (Loss) Attributable to Noncontrolling Interests — — 1,591 — 1,591 Comprehensive Income (Loss) Attributable to Iron Mountain Incorporated $ 292,405 $ 470,740 $ 155,237 $ (625,977 ) $ 292,405 CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (Continued) Year Ended December 31, 2018 Parent Guarantors Non- Guarantors Eliminations Consolidated Revenues: Storage rental $ — $ 1,600,230 $ 1,022,225 $ — $ 2,622,455 Service — 970,678 632,628 — 1,603,306 Intercompany revenues — 4,759 18,439 (23,198 ) — Total Revenues — 2,575,667 1,673,292 (23,198 ) 4,225,761 Operating Expenses: Cost of sales (excluding depreciation and amortization) — 1,007,794 793,788 — 1,801,582 Intercompany cost of sales — 18,439 4,759 (23,198 ) — Selling, general and administrative (288 ) 711,702 327,561 — 1,038,975 Depreciation and amortization 122 403,480 235,912 — 639,514 (Gain) Loss on disposal/write-down of property, plant and equipment (excluding real estate), net — (1,489 ) (8,329 ) — (9,818 ) Total Operating Expenses (166 ) 2,139,926 1,353,691 (23,198 ) 3,470,253 Operating (Loss) Income 166 435,741 319,601 — 755,508 Interest Expense (Income), Net 199,955 5,692 203,642 — 409,289 Other Expense (Income), Net 2,328 16,744 (30,764 ) — (11,692 ) (Loss) Income from Continuing Operations Before Provision (Benefit) for Income Taxes and Gain on Sale of Real Estate (202,117 ) 413,305 146,723 — 357,911 (Benefit) Provision for Income Taxes — (2,418 ) 38,681 — 36,263 Gain on Sale of Real Estate, Net of Tax — (836 ) (54,492 ) — (55,328 ) Equity in the (Earnings) Losses of Subsidiaries, Net of Tax (565,468 ) (156,993 ) — 722,461 — Income (Loss) from Continuing Operations 363,351 573,552 162,534 (722,461 ) 376,976 (Loss) Income from Discontinued Operations, Net of Tax — (12,283 ) (144 ) — (12,427 ) Net Income (Loss) 363,351 561,269 162,390 (722,461 ) 364,549 Less: Net Income (Loss) Attributable to Noncontrolling Interests — — 1,198 — 1,198 Net Income (Loss) Attributable to Iron Mountain Incorporated $ 363,351 $ 561,269 $ 161,192 $ (722,461 ) $ 363,351 Net Income (Loss) $ 363,351 $ 561,269 $ 162,390 $ (722,461 ) $ 364,549 Other Comprehensive Income (Loss): Foreign Currency Translation Adjustment 11,070 — (175,177 ) — (164,107 ) Change in Fair Value of Interest Rate Swap Agreements (973 ) — — — (973 ) Equity in Other Comprehensive Income (Loss) of Subsidiaries (171,772 ) (139,971 ) — 311,743 — Total Other Comprehensive Income (Loss) (161,675 ) (139,971 ) (175,177 ) 311,743 (165,080 ) Comprehensive Income (Loss) 201,676 421,298 (12,787 ) (410,718 ) 199,469 Comprehensive Income (Loss) Attributable to Noncontrolling Interests — — (2,207 ) — (2,207 ) Comprehensive Income (Loss) Attributable to Iron Mountain Incorporated $ 201,676 $ 421,298 $ (10,580 ) $ (410,718 ) $ 201,676
Schedule of Selected Consolidated Statements of Cash Flows of Parent, Guarantors, Canada Company and Non-Guarantors	CONSOLIDATED STATEMENTS OF CASH FLOWS Year Ended December 31, 2016 Parent Guarantors Canada Company Non- Guarantors Eliminations Consolidated Cash Flows from Operating Activities: Cash Flows from Operating Activities $ (168,389 ) $ 633,808 $ 41,885 $ 33,912 $ — $ 541,216 Cash Flows from Operating Activities-Discontinued Operations — 1,076 1,710 (107 ) — 2,679 Cash Flows from Operating Activities (168,389 ) 634,884 43,595 33,805 — 543,895 Cash Flows from Investing Activities: Capital expenditures — (192,736 ) (10,284 ) (125,583 ) — (328,603 ) Cash paid for acquisitions, net of cash acquired — 4,007 (2,405 ) (293,567 ) — (291,965 ) Intercompany loans to subsidiaries 175,092 (166,400 ) (20,185 ) — 11,493 — Investment in subsidiaries (1,585 ) (1,585 ) — — 3,170 — Acquisitions of customer relationships and customer inducements — (40,217 ) (366 ) (10,183 ) — (50,766 ) Net proceeds from Divestments (see Note 6) — — 4,032 26,622 — 30,654 Proceeds from sales of property and equipment and other, net (including real estate) and proceeds from involuntary conversion of property and equipment — 5,235 30 2,712 — 7,977 Cash Flows from Investing Activities 173,507 (391,696 ) (29,178 ) (399,999 ) 14,663 (632,703 ) Cash Flows from Investing Activities-Discontinued Operations — 78,564 16,153 1,995 — 96,712 Cash Flows from Investing Activities 173,507 (313,132 ) (13,025 ) (398,004 ) 14,663 (535,991 ) Cash Flows from Financing Activities: Repayment of revolving credit and term loan facilities, bridge facilities and other debt (1,163,654 ) (7,511,941 ) (1,273,228 ) (4,902,617 ) — (14,851,440 ) Proceeds from revolving credit and term loan facilities, bridge facilities and other debt 1,150,628 7,144,874 1,130,193 5,118,693 — 14,544,388 Net proceeds from sales of senior notes 492,500 246,250 186,693 — — 925,443 Debt (repayment to) financing from and equity (distribution to) contribution from noncontrolling interests, net — — — (466 ) — (466 ) Intercompany loans from parent — (183,454 ) (67,514 ) 262,461 (11,493 ) — Equity contribution from parent — 1,585 — 1,585 (3,170 ) — Parent cash dividends (505,871 ) — — — — (505,871 ) Net proceeds (payments) associated with employee stock-based awards 31,922 — — — — 31,922 Payment of debt financing and stock issuance costs (8,389 ) (3,489 ) (895 ) (5,830 ) — (18,603 ) Cash Flows from Financing Activities (2,864 ) (306,175 ) (24,751 ) 473,826 (14,663 ) 125,373 Cash Flows from Financing Activities-Discontinued Operations — — — — — — Cash Flows from Financing Activities (2,864 ) (306,175 ) (24,751 ) 473,826 (14,663 ) 125,373 Effect of exchange rates on cash and cash equivalents — — (1,891 ) (23,283 ) — (25,174 ) Increase (Decrease) in cash and cash equivalents 2,254 15,577 3,928 86,344 — 108,103 Cash and cash equivalents, including Restricted Cash, beginning of year 151 7,803 13,182 107,245 — 128,381 Cash and cash equivalents, including Restricted Cash, end of year $ 2,405 $ 23,380 $ 17,110 $ 193,589 $ — $ 236,484 CONSOLIDATED STATEMENTS OF CASH FLOWS (Continued) Year Ended December 31, 2017 Parent Guarantors Non- Eliminations Consolidated Cash Flows from Operating Activities: Cash Flows from Operating Activities $ (203,403 ) $ 738,256 $ 189,406 $ — $ 724,259 Cash Flows from Operating Activities-Discontinued Operations — (1,345 ) (1,946 ) — (3,291 ) Cash Flows from Operating Activities (203,403 ) 736,911 187,460 — 720,968 Cash Flows from Investing Activities: Capital expenditures — (235,996 ) (107,135 ) — (343,131 ) Cash paid for acquisitions, net of cash acquired — (96,946 ) (122,759 ) — (219,705 ) Intercompany loans to subsidiaries (990,635 ) (344,919 ) — 1,335,554 — Investment in subsidiaries (16,170 ) — — 16,170 — Acquisitions of customer relationships and customer inducements — (63,765 ) (11,420 ) — (75,185 ) Net proceeds from Divestments (see Note 6) — — 29,236 — 29,236 Proceeds from sales of property and equipment and other, net (including real estate) and proceeds from involuntary conversion of property and equipment — 12,963 (3,626 ) — 9,337 Cash Flows from Investing Activities-Continuing Operations (1,006,805 ) (728,663 ) (215,704 ) 1,351,724 (599,448 ) Cash Flows from Investing Activities-Discontinued Operations — — — — — Cash Flows from Investing Activities (1,006,805 ) (728,663 ) (215,704 ) 1,351,724 (599,448 ) Cash Flows from Financing Activities: Repayment of revolving credit and term loan facilities, bridge facilities and other debt (262,579 ) (8,077,553 ) (6,089,563 ) — (14,429,695 ) Proceeds from revolving credit and term loan facilities, bridge facilities and other debt 224,660 7,650,617 6,041,778 — 13,917,055 Early retirement of senior subordinated and senior notes (1,031,554 ) — (715,302 ) — (1,746,856 ) Net proceeds from sales of senior notes 2,134,870 — 522,078 — 2,656,948 Debit balances (payments) under cash pools — 56,233 38,493 (94,726 ) — Debt (repayment to) financing from and equity (distribution to) contribution from noncontrolling interests, net — — 9,079 — 9,079 Intercompany loans from parent — 982,783 352,771 (1,335,554 ) — Equity contribution from parent — — 16,170 (16,170 ) — Parent cash dividends (439,999 ) — — — (439,999 ) Net proceeds (payments) associated with employee stock-based awards 13,095 — — — 13,095 Net proceeds associated with the Equity Offering, including Over-Allotment Option 516,462 — — — 516,462 Net proceeds associated with the At The Market (ATM) Program 59,129 — — — 59,129 Payment of debt financing and stock issuance costs (3,848 ) (9,391 ) (1,554 ) — (14,793 ) Cash Flows from Financing Activities-Continuing Operations 1,210,236 602,689 173,950 (1,446,450 ) 540,425 Cash Flows from Financing Activities-Discontinued Operations — — — — — Cash Flows from Financing Activities 1,210,236 602,689 173,950 (1,446,450 ) 540,425 Effect of exchange rates on cash and cash equivalents — — 27,270 — 27,270 Increase (Decrease) in cash and cash equivalents 28 610,937 172,976 (94,726 ) 689,215 Cash and cash equivalents, including Restricted Cash, beginning of year 2,405 23,380 210,699 — 236,484 Cash and cash equivalents, including Restricted Cash, end of year $ 2,433 $ 634,317 $ 383,675 $ (94,726 ) $ 925,699 CONSOLIDATED STATEMENTS OF CASH FLOWS (Continued) Year Ended December 31, 2018 Parent Guarantors Non- Eliminations Consolidated Cash Flows from Operating Activities: Cash Flows from Operating Activities-Continuing Operations $ (217,819 ) $ 877,864 $ 276,499 $ — $ 936,544 Cash Flows from Operating Activities-Discontinued Operations — (995 ) — — (995 ) Cash Flows from Operating Activities (217,819 ) 876,869 276,499 — 935,549 Cash Flows from Investing Activities: Capital expenditures — (312,856 ) (147,206 ) — (460,062 ) Cash paid for acquisitions, net of cash acquired — (1,338,888 ) (419,669 ) — (1,758,557 ) Intercompany loans to subsidiaries 805,799 90,569 — (896,368 ) — Acquisitions of customer relationships, customer inducements and data center lease-based intangibles — (73,429 ) (25,258 ) — (98,687 ) Net proceeds from Divestments (see Note 6) — 1,019 — — 1,019 Proceeds from sales of property and equipment and other, net (including real estate) and proceeds from involuntary conversion of property and equipment — 299 85,860 — 86,159 Cash Flows from Investing Activities-Continuing Operations 805,799 (1,633,286 ) (506,273 ) (896,368 ) (2,230,128 ) Cash Flows from Investing Activities-Discontinued Operations — 8,250 — — 8,250 Cash Flows from Investing Activities 805,799 (1,625,036 ) (506,273 ) (896,368 ) (2,221,878 ) Cash Flows from Financing Activities: Repayment of revolving credit and term loan facilities, bridge facilities and other debt — (7,355,086 ) (6,837,053 ) — (14,192,139 ) Proceeds from revolving credit and term loan facilities, bridge facilities and other debt — 8,445,509 6,906,105 — 15,351,614 Debit (payments) balances under cash pools — (45,621 ) 16,510 29,111 — Debt (repayment to) financing from and equity (distribution to) contribution from noncontrolling interests, net — — (2,523 ) — (2,523 ) Intercompany loans from parent — (856,911 ) (39,457 ) 896,368 — Parent cash dividends (673,635 ) — — — (673,635 ) Net payments associated with employee stock-based awards (1,142 ) — — — (1,142 ) Net proceeds associated with the Equity Offering, including Over-Allotment Option 76,192 — — — 76,192 Net proceeds associated with the At The Market (ATM) Program 8,716 — — — 8,716 Payment of debt financing and stock issuance costs (412 ) (12,391 ) (3,602 ) — (16,405 ) Cash Flows from Financing Activities-Continuing Operations (590,281 ) 175,500 39,980 925,479 550,678 Cash Flows from Financing Activities-Discontinued Operations — — — — — Cash Flows from Financing Activities (590,281 ) 175,500 39,980 925,479 550,678 Effect of exchange rates on cash and cash equivalents — — (24,563 ) — (24,563 ) (Decrease) Increase in cash and cash equivalents (2,301 ) (572,667 ) (214,357 ) 29,111 (760,214 ) Cash and cash equivalents, including Restricted Cash, beginning of year 2,433 634,317 383,675 (94,726 ) 925,699 Cash and cash equivalents, including Restricted Cash, end of year $ 132 $ 61,650 $ 169,318 $ (65,615 ) $ 165,485

Acquisitions (Tables)

Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Business acquisition, pro forma information	(Unaudited) Year Ended December 31, 2016(1) 2017(2) 2018(2) Total Revenues $ 3,763,929 $ 3,983,016 $ 4,229,251 Income (Loss) from Continuing Operations $ 138,954 $ 124,385 $ 386,928 Per Share Income (Loss) from Continuing Operations - Basic $ 0.53 $ 0.43 $ 1.35 Per Share Income (Loss) from Continuing Operations - Diluted $ 0.53 $ 0.43 $ 1.35 ______________________________________________________________________________ (1) The Pro Forma Financial Information for the year ended December 31, 2016 only reflect the pro forma results of us and Recall. (2) The Pro Forma Financial Information for the years ended December 31, 2017 and 2018 only reflect pro forma results of us and IODC as Recall was included in our actual financial results for the years ended December 31, 2017 and 2018.
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: 2016 2017 2018 Recall Other Fiscal Year 2016 Acquisitions Total Total IODC Transaction Other Fiscal Year 2018 Acquisitions Total Cash Paid (gross of cash acquired)(1) $ 331,834 $ 37,350 $ 369,184 $ 234,314 $ 1,347,046 $ 432,078 $ 1,779,124 Purchase Price Holdbacks and Other(2) — — — 20,093 — 35,218 35,218 Fair Value of Common Stock Issued 1,835,026 — 1,835,026 83,014 — — — Fair Value of Noncontrolling Interests — 3,506 3,506 1,507 — — — Total Consideration 2,166,860 40,856 2,207,716 338,928 1,347,046 467,296 1,814,342 Fair Value of Identifiable Assets Acquired: Cash 76,461 576 77,037 14,746 34,307 10,227 44,534 Accounts Receivable and Prepaid Expenses 176,775 2,703 179,478 19,309 7,070 13,076 20,146 Fair Value of Recall Divestments(3) 121,689 — 121,689 — — — — Other Assets 57,563 541 58,104 5,070 — 4,586 4,586 Property, Plant and Equipment(4) 622,063 10,963 633,026 150,878 863,027 225,848 1,088,875 Customer Relationship Intangible Assets(5) 709,139 20,842 729,981 116,028 — 44,622 44,622 Data Center In-Place Leases(6) — — — 6,300 104,340 36,130 140,470 Data Center Tenant Relationships(7) — — — — 77,362 18,410 95,772 Data Center Above-Market Leases(8) — — — — 16,439 2,381 18,820 Other Intangible Assets — — — 14,487 — — — Debt Assumed (792,385 ) — (792,385 ) (5,287 ) — (12,312 ) (12,312 ) Accounts Payable, Accrued Expenses and Other Liabilities (276,814 ) (11,504 ) (288,318 ) (24,869 ) (36,230 ) (17,206 ) (53,436 ) Deferred Income Taxes (164,074 ) (2,985 ) (167,059 ) (18,122 ) — (43,218 ) (43,218 ) Data Center Below-Market Leases(8) — — — — (11,421 ) (694 ) (12,115 ) Total Fair Value of Identifiable Net Assets Acquired 530,417 21,136 551,553 278,540 1,054,894 281,850 1,336,744 Goodwill Initially Recorded(9) $ 1,636,443 $ 19,720 $ 1,656,163 $ 60,388 $ 292,152 $ 185,446 $ 477,598 _______________________________________________________________________________ (1) Included in cash paid for acquisitions in the Consolidated Statement of Cash Flows for the year ended December 31, 2016 is net cash acquired of $77,037 and cash received of $182 related to acquisitions made in years prior to 2016. Included in cash paid for acquisitions in the Consolidated Statement of Cash Flows for the year ended December 31, 2017 is net cash acquired of $14,746 and contingent and other payments, net of $137 related to acquisitions made in years prior to 2017. Included in cash paid for acquisitions in the Consolidated Statement of Cash Flows for the year ended December 31, 2018 is net cash acquired of $44,534 and contingent and other payments, net of $23,967 related to acquisitions made in years prior to 2018. (2) Purchase price holdbacks and other includes $16,771 purchase price accrued for the Santa Fe China Transaction in 2017 and includes $18,824 purchase price accrued for the EvoSwitch Transaction in 2018. (3) Represents the fair value, less costs to sell, of the Initial United States Divestments, the Seattle/Atlanta Divestments, the Recall Canadian Divestments and the UK Divestments. (4) Consists primarily of buildings, building improvements, leasehold improvements, data center infrastructure, racking structures, warehouse equipment and computer hardware and software. (5) The weighted average lives of customer relationship intangible assets associated with acquisitions in 2016 , 2017 and 2018 was 13 years, 12 years and 10 years, respectively. (6) The weighted average lives of data center in-place leases associated with acquisitions in 2018 was 6 years. (7) The weighted average lives of data center tenant relationships associated with acquisitions in 2018 was 9 years. (8) The weighted average lives of data center above-market leases associated with acquisitions in 2018 was 3 years and the weighted average lives of data center below-market leases associated with acquisitions in 2018 was 7 years. (9) The goodwill associated with acquisitions, including Recall and 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 us and the acquired businesses.

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2018
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 are presented below: December 31, 2017 2018 Deferred Tax Assets: Accrued liabilities and other adjustments $ 38,931 $ 54,506 Net operating loss carryforwards 105,026 92,952 Federal benefit of unrecognized tax benefits 3,051 2,925 Valuation allowance (61,756 ) (55,666 ) 85,252 94,717 Deferred Tax Liabilities: Other assets, principally due to differences in amortization (168,028 ) (166,469 ) Plant and equipment, principally due to differences in depreciation (61,530 ) (74,147 ) Other(1) — (26,260 ) (229,558 ) (266,876 ) Net deferred tax liability $ (144,306 ) $ (172,159 ) ______________________________________________________________________________ (1) Other consists primarily of withholding taxes on the earnings of foreign qualified REIT subsidiaries, capital lease obligations and an accounting method change for certain tangible assets acquired as part of the IODC Transaction. At December 31, 2017, the comparable amount of approximately $12,800 was presented as a reduction to accrued liabilities and other adjustments in the table above.
Schedule of current and noncurrent deferred tax assets (liabilities)	The deferred tax assets and liabilities are presented below: December 31, 2017 2018 Noncurrent deferred tax assets (Included in Other, a component of Other Assets, net) $ 11,422 $ 11,677 Noncurrent deferred tax liabilities (155,728 ) (183,836 )
Roll forward of Valuation allowance	Rollforward of the valuation allowance is as follows: Year Ended December 31, Balance at Beginning of the Year Charged (Credited) to Expense Other Increases/(Decreases)(1) Balance at End of the Year 2016 $ 60,009 $ 7,660 $ 3,690 $ 71,359 2017 71,359 (4,317 ) (5,286 ) 61,756 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 and disposal of certain foreign subsidiaries.
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 and gain on sale of real estate are: Year Ended December 31, 2016 2017 2018 United States $ 106,223 $ 161,198 $ 201,730 Canada 28,157 50,019 53,779 Other Foreign 12,264 4,888 102,402 $ 146,644 $ 216,105 $ 357,911
Provision (benefit) for income taxes	The provision (benefit) for income taxes consists of the following components: Year Ended December 31, 2016 2017 2018 Federal—current $ 52,944 $ 16,345 $ 703 Federal—deferred (28,127 ) (12,655 ) (4,675 ) State—current 6,096 3,440 918 State—deferred (1,479 ) (1,276 ) 627 Foreign—current 36,272 42,532 45,371 Foreign—deferred (20,762 ) (22,439 ) (6,681 ) $ 44,944 $ 25,947 $ 36,263
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 former federal statutory tax rate of 35.0% to income from continuing operations before provision (benefit) for income taxes and gain on sale of real estate for the years ended December 31, 2016 and 2017 and the current federal statutory tax rate of 21.0% to income from continuing operations before provision (benefit) for income taxes and gain on sale of real estate for the year ended December 31, 2018 is as follows: Year Ended December 31, 2016 2017 2018 Computed "expected" tax provision $ 51,325 $ 75,637 $ 75,161 Changes in income taxes resulting from: Tax adjustment relating to REIT (18,526 ) (78,873 ) (35,165 ) Deferred tax adjustment and other taxes due to REIT conversion 247 — — State taxes (net of federal tax benefit) 3,796 2,692 1,599 Increase (decrease) in valuation allowance (net operating losses) 7,660 (4,317 ) 3,568 Foreign repatriation 510 29,476 — U.S. Federal Rate Reduction — (4,685 ) — Reserve (reversal) accrual and audit settlements (net of federal tax benefit) 1,898 (9,103 ) (13,985 ) Foreign tax rate differential (13,328 ) (11,949 ) 5,545 Disallowed foreign interest, Subpart F income, and other foreign taxes 7,773 29,325 903 Other, net 3,589 (2,256 ) (1,363 ) Provision (Benefit) for Income Taxes $ 44,944 $ 25,947 $ 36,263
Tax years subject to examination by major tax jurisdictions	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 2012 to present Canada 2015 to present United Kingdom
Reconciliation of unrecognized tax benefits	A rollforward of unrecognized tax benefits is as follows: Gross tax contingencies—December 31, 2015 $ 47,685 Gross additions based on tax positions related to the current year 3,704 Gross additions for tax positions of prior years 12,207 Gross reductions for tax positions of prior years (1,740 ) Lapses of statutes (2,390 ) Settlements — Gross tax contingencies—December 31, 2016 $ 59,466 Gross additions based on tax positions related to the current year 4,067 Gross additions for tax positions of prior years 3,368 Gross reductions for tax positions of prior years(1) (2,789 ) Lapses of statutes (2,629 ) Settlements (22,950 ) 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 _______________________________________________________________________________ (1) This amount includes gross additions related to the Recall Transaction.

Quarterly Results of Operatio_2

Quarterly Results of Operations (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Quarterly Results of Operations (Unaudited)	Quarter Ended March 31 June 30 September 30 December 31 2017 Total revenues $ 938,876 $ 949,806 $ 965,661 $ 991,235 Operating income (loss) 147,755 170,194 176,756 154,405 Income (loss) from continuing operations 58,844 83,148 25,382 24,349 Total (loss) income from discontinued operations (337 ) (2,026 ) (1,058 ) (2,870 ) Net income (loss) 58,507 81,122 24,324 21,479 Net income (loss) attributable to Iron Mountain Incorporated 58,125 78,630 24,345 22,721 (1) Earnings (losses) per Share-Basic: Income (loss) per share from continuing operations 0.22 0.31 0.10 0.09 Total (loss) income per share from discontinued operations — (0.01 ) — (0.01 ) Net income (loss) per share attributable to Iron Mountain Incorporated 0.22 0.30 0.09 0.08 Earnings (losses) per Share-Diluted: Income (loss) per share from continuing operations 0.22 0.30 0.10 0.09 Total (loss) income per share from discontinued operations — (0.01 ) — (0.01 ) Net income (loss) per share attributable to Iron Mountain Incorporated 0.22 0.30 0.09 0.08 2018 Total revenues $ 1,042,458 $ 1,060,823 $ 1,060,991 $ 1,061,489 Operating income (loss) 164,559 203,359 195,746 191,844 Income (loss) from continuing operations 45,614 93,903 78,628 158,831 Total (loss) income from discontinued operations (462 ) (360 ) (11,605 ) — Net income (loss) 45,152 93,543 67,023 158,831 Net income (loss) attributable to Iron Mountain Incorporated 44,684 93,401 67,148 158,118 (2) Earnings (losses) per Share-Basic: Income (loss) per share from continuing operations 0.16 0.33 0.28 0.55 Total (loss) income per share from discontinued operations — — (0.04 ) — Net income (loss) per share attributable to Iron Mountain Incorporated 0.16 0.33 0.23 0.55 Earnings (losses) per Share-Diluted: Income (loss) per share from continuing operations 0.16 0.33 0.27 0.55 Total (loss) income per share from discontinued operations — — (0.04 ) — Net income (loss) per share attributable to Iron Mountain Incorporated 0.16 0.33 0.23 0.55 _______________________________________________________________________________ (1) The change in net income (loss) attributable to Iron Mountain Incorporated in the fourth quarter of 2017 compared to the third quarter of 2017 is primarily attributable to increases in operating expenses, primarily associated with increased Significant Acquisition Costs and bad debt expenses, as well as a $3,011 intangible impairment charge recorded during the fourth quarter of 2017. This increase in operating expenses was partially offset by a decrease in debt extinguishment expense in the fourth quarter of 2017 compared to the third quarter of 2017 of approximately $18,200 , as well as a decrease in the provision for income taxes recorded in the fourth quarter of 2017 compared to the third quarter of 2017 of approximately $5,800 . The decrease in the tax provision is primarily attributable to benefits derived from (i) rate changes as a result of the Tax Reform Legislation, (ii) the release of reserves and benefits recorded as a result of closing tax years; and (iii) the change in our estimated annual effective tax rate, which were partially offset by a provision related to the establishment of a valuation allowance on certain of our foreign net operating losses in Brazil. (2) The change in net income (loss) attributable to Iron Mountain Incorporated in the fourth quarter of 2018 compared to the third quarter of 2018 is primarily attributable to (i) gains of approximately $54,500 recorded during the fourth quarter of 2018 associated with the sale of land and buildings in the United Kingdom (see Note 2.g.), (ii) a gain on disposal/write-down of property, plant and equipment (excluding real estate) recorded during the fourth quarter of 2018 of approximately $8,800 related to the receipt of insurance proceeds related to the involuntary conversion of certain assets in a facility we own in Argentina (see Note 2.g.), (iii) a decrease in the provision for income taxes recorded in the fourth quarter of 2018 compared to the third quarter of 2018 of approximately $19,900 , (iv) an increase in gains on foreign currency transactions in the fourth quarter of 2018 compared to the third quarter of 2018 of approximately $20,000 and (v) a charge of $11,100 recorded during the third quarter of 2018 relating to the resolution of the post-closing adjustments to the Access Contingent Consideration that did not recur during the fourth quarter of 2018.

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2018
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: North North Western European Business Other International Business Global Data Center Business Corporate and Total As of and for the Year Ended December 31, 2016 Total Revenues $ 1,930,699 $ 392,814 $ 447,357 $ 659,370 $ 24,249 $ 56,964 $ 3,511,453 Storage Rental 1,150,646 264,148 275,659 393,005 22,026 37,421 2,142,905 Service 780,053 128,666 171,698 266,365 2,223 19,543 1,368,548 Depreciation and Amortization 215,330 26,629 55,427 100,645 4,827 49,468 452,326 Depreciation 186,467 20,666 42,458 67,465 4,610 43,860 365,526 Amortization 28,863 5,963 12,969 33,180 217 5,608 86,800 Adjusted EBITDA 775,717 224,522 136,985 169,563 6,212 (225,711 ) 1,087,288 Total Assets(1) 4,996,216 826,320 1,020,439 2,114,599 167,757 361,469 9,486,800 Expenditures for Segment Assets 145,636 26,054 31,251 365,845 70,060 32,488 671,334 Capital Expenditures 111,062 22,731 30,735 62,594 70,060 31,421 328,603 Cash Paid for Acquisitions, Net of Cash Acquired(2) (2,591 ) (59 ) (6,878 ) 300,451 — 1,042 291,965 Acquisitions of Customer Relationships and Customer Inducements 37,165 3,382 7,394 2,800 — 25 50,766 As of and for the Year Ended December 31, 2017 Total Revenues 2,050,346 401,640 490,746 795,851 37,694 69,301 3,845,578 Storage Rental 1,221,495 276,416 303,205 493,118 35,839 47,484 2,377,557 Service 828,851 125,224 187,541 302,733 1,855 21,817 1,468,021 Depreciation and Amortization 240,524 34,759 64,051 119,402 10,224 53,416 522,376 Depreciation 201,204 24,623 47,526 78,664 8,617 45,649 406,283 Amortization 39,320 10,136 16,525 40,738 1,607 7,767 116,093 Adjusted EBITDA 884,158 223,324 159,142 227,312 11,275 (245,015 ) 1,260,196 Total Assets(1) 5,050,240 839,539 911,012 2,401,579 382,198 1,387,834 10,972,402 Expenditures for Segment Assets 205,531 31,279 21,853 166,057 86,543 126,758 638,021 Capital Expenditures 134,785 31,279 19,782 76,720 32,015 48,550 343,131 Cash Paid for Acquisitions, Net of Cash Acquired 6,624 — — 80,345 54,528 78,208 219,705 Acquisitions of Customer Relationships and Customer Inducements 64,122 — 2,071 8,992 — — 75,185 North American Records and Information Management Business North American Data Management Business Western European Business Other International Business Global Data Center Business Corporate and Other Business Total Consolidated As of and for the Year Ended December 31, 2018 Total Revenues $ 2,137,781 $ 393,993 $ 521,555 $ 821,333 $ 228,983 $ 122,116 $ 4,225,761 Storage Rental 1,222,230 273,193 325,624 512,358 218,675 70,375 2,622,455 Service 915,551 120,800 195,931 308,975 10,308 51,741 1,603,306 Depreciation and Amortization 243,415 38,850 64,795 125,154 105,680 61,620 639,514 Depreciation 190,493 30,066 45,590 75,294 58,707 52,590 452,740 Amortization 52,922 8,784 19,205 49,860 46,973 9,030 186,774 Adjusted EBITDA 956,890 213,893 180,172 243,008 99,574 (257,668 ) 1,435,869 Total Assets(1) 4,933,269 807,564 1,179,065 2,262,672 2,217,505 452,172 11,852,247 Expenditures for Segment Assets 196,010 19,325 63,142 165,167 1,794,386 79,276 2,317,306 Capital Expenditures 115,555 19,325 39,163 80,275 152,739 53,005 460,062 Cash Paid for Acquisitions, Net of Cash Acquired 1,551 — 14,579 77,087 1,639,427 25,913 1,758,557 Acquisitions of Customer Relationships, Customer Inducements and Contract Fulfillment Costs 78,904 — 9,400 7,805 2,220 358 98,687 _______________________________________________________________________________ (1) Excludes all intercompany receivables or payables and investment in subsidiary balances. (2) Cash paid for acquisitions, net of cash acquired for the Other International Business segment for the year ended December 31, 2016 primarily consists of the cash component of the purchase price for the Recall Transaction, as the IMI entity that made the cash payment was an Australian subsidiary. However, the Recall Transaction also benefited the North American Records and Information Management Business, North American Data Management Business and Western European Business segments.
Schedule of Reconciliation of Adjusted EBITDA to Income (Loss) From Continuing Operations on a Consolidated Basis	A reconciliation of Adjusted EBITDA to income (loss) from continuing operations on a consolidated basis is as follows: Year Ended December 31, 2016 2017 2018 Adjusted EBITDA $ 1,087,288 $ 1,260,196 $ 1,435,869 (Add)/Deduct: Gain on Sale of Real Estate, Net of Tax (2,180 ) (1,565 ) (55,328 ) Provision (Benefit) for Income Taxes 44,944 25,947 36,263 Other Expense, Net 44,300 79,429 (11,692 ) Interest Expense, Net 310,662 353,575 409,289 Loss (Gain) on Disposal/Write-down of Property, Plant and Equipment (Excluding Real Estate), Net 1,412 799 (9,818 ) Depreciation and Amortization 452,326 522,376 639,514 Intangible Impairments — 3,011 — Significant Acquisition Costs(1) 131,944 84,901 50,665 Income (Loss) from Continuing Operations $ 103,880 $ 191,723 $ 376,976 _______________________________________________________________________________ (1) Represents operating expenditures associated with (1) the Recall Transaction, including: (i) advisory and professional fees to complete the Recall Transaction; (ii) costs associated with the Divestments required in connection with receipt of regulatory approvals (including transitional services); and (iii) costs to integrate Recall with our existing operations, including moving, severance, facility upgrade, REIT integration and system upgrade costs, as well as certain costs associated with our shared service center initiative for our finance, human resources and information technology functions; and (2) the advisory and professional fees to complete the IODC Transaction (collectively, "Significant Acquisition Costs").
Schedule of Operations in Different Geographical Areas	Information as to our operations in different geographical areas is as follows: Year Ended December 31, 2016 2017 2018 Revenues: United States $ 2,173,782 $ 2,310,296 $ 2,579,847 United Kingdom 237,032 246,373 280,993 Canada 230,944 243,625 249,505 Australia 148,175 157,333 155,367 Other International 721,520 887,951 960,049 Total Revenues $ 3,511,453 $ 3,845,578 $ 4,225,761 Long-lived Assets: United States $ 5,238,807 $ 5,476,551 $ 6,902,232 United Kingdom 400,937 529,233 547,768 Canada 463,396 500,396 453,398 Australia 542,055 470,432 442,755 Other International 1,729,498 2,045,475 2,297,980 Total Long-lived Assets $ 8,374,693 $ 9,022,087 $ 10,644,133
Schedule of Revenues By Product and Service Lines	Information as to our revenues by product and service lines by segment are as follows: North American Records and Information Management Business North American Data Management Business Western European Business Other International Business Global Data Center Business Corporate and Other Business Total Consolidated For the Year Ended December 31, 2016 Records Management(1) $ 1,629,367 $ 14,857 $ 373,994 $ 578,209 $ — $ 35,468 $ 2,631,895 Data Management(1) — 370,419 73,182 59,989 — 21,496 525,086 Information Destruction(1)(2) 301,332 7,538 181 21,172 — — 330,223 Data Center — — — — 24,249 — 24,249 Total Revenues 1,930,699 392,814 447,357 659,370 24,249 56,964 3,511,453 For the Year Ended December 31, 2017 Records Management(1) 1,706,288 — 417,221 686,988 — 37,194 2,847,691 Data Management(1) — 391,346 73,389 77,413 — 32,103 574,251 Information Destruction(1)(2) 344,058 10,294 136 31,450 — 4 385,942 Data Center — — — — 37,694 — 37,694 Total Revenues 2,050,346 401,640 490,746 795,851 37,694 69,301 3,845,578 For the Year Ended December 31, 2018 Records Management(1) 1,751,058 — 443,960 708,297 — 64,607 2,967,922 Data Management(1) — 384,370 77,189 77,476 — 57,509 596,544 Information Destruction(1)(2) 386,723 9,623 406 35,560 — — 432,312 Data Center — — — — 228,983 — 228,983 Total Revenues 2,137,781 393,993 521,555 821,333 228,983 122,116 4,225,761 _______________________________________________________________________________ (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.

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Schedule of future minimum lease payments for leases	Estimated minimum future lease payments (excluding common area maintenance charges) include payments for certain renewal periods at our option because failure to renew results in an economic disincentive due to significant capital expenditure costs (e.g., racking structures), thereby making it reasonably assured that we will renew the lease. Such payments in effect at December 31, are as follows: Year Operating Lease Payments Sublease Income Capital Leases 2019 $ 323,454 $ (7,525 ) $ 80,513 2020 293,276 (7,200 ) 71,335 2021 267,379 (7,063 ) 61,269 2022 246,128 (6,694 ) 52,832 2023 221,808 (6,409 ) 44,722 Thereafter 1,287,807 (6,279 ) 377,750 Total minimum lease payments $ 2,639,852 $ (41,170 ) 688,421 Less amounts representing interest (241,248 ) Present value of capital lease obligations $ 447,173
Contractual obligations related to purchase commitments	In addition, we have certain contractual obligations related to purchase commitments which require minimum payments as follows: Year Purchase 2019 $ 232,880 2020 48,436 2021 40,112 2022 20,042 2023 2,196 Thereafter 1,876 $ 345,542 ______________________________________________________________________________ (1) Purchase commitments include obligations for future construction costs associated with the expansion of our data center business which represent a substantial portion of the amount of purchase commitments due in 2019.

Stockholders' Equity Matters (T

Stockholders' Equity Matters (Tables)	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Schedule of Dividends Declared and Payments	In 2016, 2017 and 2018 , our board of directors declared the following dividends: Declaration Date Dividend Per Share Record Date Total Amount Payment Date February 17, 2016 $ 0.4850 March 7, 2016 $ 102,651 March 21, 2016 May 25, 2016 0.4850 June 6, 2016 127,469 June 24, 2016 July 27, 2016 0.4850 September 12, 2016 127,737 September 30, 2016 October 31, 2016 0.5500 December 15, 2016 145,006 December 30, 2016 February 15, 2017 0.5500 March 15, 2017 145,235 April 3, 2017 May 24, 2017 0.5500 June 15, 2017 145,417 July 3, 2017 July 27, 2017 0.5500 September 15, 2017 146,772 October 2, 2017 October 24, 2017 0.5875 December 15, 2017 166,319 January 2, 2018 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
Schedule of Classification of Dividends Paid	For the years ended December 31, 2016 , 2017 and 2018 , the dividends we paid on our common shares were classified as follows: Year Ended December 31, 2016 2017 2018 Nonqualified ordinary dividends 45.5 % 82.1 % 83.0 % Qualified ordinary dividends 21.0 % 17.9 % 4.8 % Capital gains — % — % 5.8 % Return of capital 33.5 % 0.0 % 6.4 % 100.0 % 100.0 % 100.0 %

Divestments (Tables)

Divestments (Tables)	12 Months Ended
	Dec. 31, 2018
Discontinued Operations and Disposal Groups [Abstract]
Summary of Operations of the Recall Divestments	The table below summarizes certain results of operations of the Recall Divestments included in discontinued operations for the years ended December 31, 2016, 2017 and 2018: Year Ended December 31, Description 2016(1) 2017 2018(2) Total Revenues $ 13,047 $ — $ — Income (Loss) from Discontinued Operations Before Provision (Benefit) for Income Taxes 4,105 (8,118 ) (12,574 ) Provision (Benefit) for Income Taxes 752 (1,827 ) (147 ) Income (Loss) from Discontinued Operations, Net of Tax $ 3,353 $ (6,291 ) $ (12,427 ) ______________________________________________________________________________ (1) The Access Sale occurred nearly simultaneously with the closing of the Recall Transaction. Accordingly, the revenue and expenses associated with the Initial United States Divestments are not included in our Consolidated Statement of Operations for the year ended December 31, 2016 and the cash flows associated with the Initial United States Divestments are not included in our Consolidated Statement of Cash Flows for the year ended December 31, 2016, due to the immaterial nature of the revenues, expenses and cash flows related to the Initial United States Divestments for the period of time we owned these businesses (May 2, 2016 through May 4, 2016). (2) The loss from discontinued operations during the year ended December 31, 2018 primarily relates to losses incurred due to the resolution of the post-closing adjustments to the Access Contingent Consideration in connection with our agreement with Access CIG. See Note 6.

Significant Acquisition Costs (

Significant Acquisition Costs (Tables)	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Summary of Significant Acquisition Costs Included in the Statement of Operations	Significant Acquisition Costs included in the accompanying Consolidated Statements of Operations are as follows: Year Ended December 31, 2016 2017 2018 Cost of sales (excluding depreciation and amortization) $ 11,963 $ 20,493 $ 7,628 Selling, general and administrative expenses 119,981 64,408 43,037 Total Significant Acquisition Costs $ 131,944 $ 84,901 $ 50,665 Significant Acquisition Costs included in the accompanying Consolidated Statements of Operations by segment are as follows: Year Ended December 31, 2016 2017 2018 North American Records and Information Management Business $ 14,394 $ 15,763 $ 6,202 North American Data Management Business 2,581 2,099 637 Western European Business 16,173 20,290 8,852 Other International Business 18,842 9,570 4,899 Global Data Center Business — — 11,423 Corporate and Other Business 79,954 37,179 18,652 Total Significant Acquisition Costs $ 131,944 $ 84,901 $ 50,665

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Cash and Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accounting Policies [Abstract]
Restricted cash	$ 15,141	$ 22,167

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Derivative Instruments and Hedging Activities (Details)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Target percentage of debt portfolio with fixed interest rates	75.00%

Summary of Significant Accoun_6

Summary of Significant Accounting Policies - Property, Plant and Equipment (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property, plant and equipment, stated at cost	$ 7,600,949,000	$ 6,251,100,000
Capitalized interest	3,732,000
Capitalization of internal use computer software	29,407,000	25,166,000	$ 16,438,000
Asset retirement obligations	28,256,000	27,757,000
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, stated at cost	400,980,000	314,897,000
Buildings and building improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, stated at cost	2,991,307,000	2,039,902,000
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, stated at cost	770,666,000	592,700,000
Racking
Property, Plant and Equipment [Line Items]
Property, plant and equipment, stated at cost	2,001,831,000	1,996,594,000
Warehouse equipment/vehicles
Property, Plant and Equipment [Line Items]
Property, plant and equipment, stated at cost	481,515,000	467,345,000
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, stated at cost	56,207,000	55,245,000
Computer hardware and software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, stated at cost	680,283,000	627,571,000
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, stated at cost	$ 218,160,000	$ 156,846,000
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_7

Summary of Significant Accounting Policies - Long Lived Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounting Policies [Abstract]
Loss (Gain) on disposal/write-down of property, plant and equipment (excluding real estate), net	$ (9,818)	$ 799	$ 1,412
Gain on sale of real estate, net of tax	55,328	1,565	2,180
Tax effect on gain on sale of real estate	$ 8,476		$ 130
Gain on sale of real estate		$ 12,700

Summary of Significant Accoun_8

Summary of Significant Accounting Policies - Goodwill and Other Indefinite-Lived Intangible Assets (Details) - USD ($)	Oct. 01, 2018	Oct. 01, 2016	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounting Policies [Abstract]
Intangible impairments	$ 0	$ 0	$ 3,011,000	$ 0	$ 3,011,000	$ 0

Summary of Significant Accoun_9

Summary of Significant Accounting Policies - Schedule of Carrying Value of Goodwill, by Reporting Unit (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Goodwill
Goodwill	$ 4,441,030	$ 4,070,267
North American Records and Information Management Business | North American Records And Information Management
Goodwill
Goodwill	2,251,795	2,269,446
North American Data Management Business | North American Data Management
Goodwill
Goodwill	493,491	497,851
Corporate and Other Business | Consumer Storage
Goodwill
Goodwill	0	0
Corporate and Other Business | Fine Arts
Goodwill
Goodwill	35,526	25,298
Corporate and Other Business | Entertainment Services
Goodwill
Goodwill	34,233	34,750
Western European Business | Western Europe
Goodwill
Goodwill	381,806	396,489
Other International Business | NEE and MEAI
Goodwill
Goodwill		188,265
Other International Business | NEE And MEI
Goodwill
Goodwill	169,780
Other International Business | Latin America
Goodwill
Goodwill	136,099	155,115
Other International Business | Australia and New Zealand
Goodwill
Goodwill		316,883
Other International Business | ANZ SA
Goodwill
Goodwill	300,204
Other International Business | Asia
Goodwill
Goodwill	212,140	186,170
Global Data Center Business | Global Data Center
Goodwill
Goodwill	$ 425,956	$ 0

Summary of Significant Accou_10

Summary of Significant Accounting Policies - Schedule of Changes in Carrying Value of Goodwill, by Reportable Operating Segment (Details) - USD ($)	Oct. 01, 2018	Oct. 01, 2016	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Gross amount of goodwill [Roll Forward]
Beginning balance				$ 4,070,267,000	$ 3,905,021,000
Deductible goodwill acquired during the year			$ 10,885,000	9,895,000	10,885,000
Non-deductible goodwill acquired during the year				467,703,000	49,503,000
Goodwill impairment	$ 0	$ 0	(3,011,000)	0	(3,011,000)	$ 0
Fair value and other adjustments				4,469,000	6,628,000
Currency effects				(110,102,000)	104,756,000
Ending balance			4,070,267,000	4,441,030,000	4,070,267,000	3,905,021,000
Goodwill, Purchase Accounting Adjustments, Property, Plant And Equipment, Intangibles, Deferred Income Tax And Other Liabilities				(2,717,000)
Accumulated goodwill impairment			135,420,000	135,420,000	135,420,000
Net cash paid and received for previous acquisitions				23,967,000	137,000	(182,000)
Payments for (Proceeds from) Previous Acquisition From Previous Year				7,186,000
North American Records and Information Management Business
Gross amount of goodwill [Roll Forward]
Beginning balance				2,269,446,000	2,280,911,000
Deductible goodwill acquired during the year			894,000	0	894,000
Non-deductible goodwill acquired during the year				0	0
Goodwill impairment					0
Fair value and other adjustments				(423,000)	(25,195,000)
Currency effects				(16,026,000)	12,836,000
Ending balance			2,269,446,000	2,251,795,000	2,269,446,000	2,280,911,000
Accumulated goodwill impairment			85,909,000	85,909,000	85,909,000
North American Data Management Business
Gross amount of goodwill [Roll Forward]
Beginning balance				497,851,000	493,966,000
Deductible goodwill acquired during the year			0	0	0
Non-deductible goodwill acquired during the year				0	0
Goodwill impairment					0
Fair value and other adjustments				0	208,000
Currency effects				(4,360,000)	3,677,000
Ending balance			497,851,000	493,491,000	497,851,000	493,966,000
Accumulated goodwill impairment			0	0	0
Western European Business
Gross amount of goodwill [Roll Forward]
Beginning balance				396,489,000	349,421,000
Deductible goodwill acquired during the year			0	0	0
Non-deductible goodwill acquired during the year				5,231,000	0
Goodwill impairment					0
Fair value and other adjustments				0	10,536,000
Currency effects				(19,914,000)	36,532,000
Ending balance			396,489,000	381,806,000	396,489,000	349,421,000
Accumulated goodwill impairment			46,500,000	46,500,000	46,500,000
Other International Business
Gross amount of goodwill [Roll Forward]
Beginning balance				846,433,000	743,077,000
Deductible goodwill acquired during the year			9,274,000	3,251,000	9,274,000
Non-deductible goodwill acquired during the year				28,999,000	24,970,000
Goodwill impairment					0
Fair value and other adjustments				4,283,000	21,079,000
Currency effects				(64,743,000)	51,548,000
Ending balance			846,433,000	818,223,000	846,433,000	743,077,000
Accumulated goodwill impairment			0	0	0
Global Data Center Business
Gross amount of goodwill [Roll Forward]
Beginning balance				0	0
Deductible goodwill acquired during the year			0	0	0
Non-deductible goodwill acquired during the year				429,853,000	0
Goodwill impairment					0
Fair value and other adjustments				0	0
Currency effects				(3,897,000)	0
Ending balance			0	425,956,000	0	0
Accumulated goodwill impairment			0	0	0
Corporate and Other Business
Gross amount of goodwill [Roll Forward]
Beginning balance				60,048,000	37,646,000
Deductible goodwill acquired during the year			717,000	6,644,000	717,000
Non-deductible goodwill acquired during the year				3,620,000	24,533,000
Goodwill impairment					(3,011,000)
Fair value and other adjustments				609,000	0
Currency effects				(1,162,000)	163,000
Ending balance			60,048,000	69,759,000	60,048,000	$ 37,646,000
Accumulated goodwill impairment			$ 3,011,000	3,011,000	3,011,000
Disposal Group, Not Discontinued Operations | Russia and Ukraine Divestment
Gross amount of goodwill [Roll Forward]
Goodwill allocated to divested operations					(3,515,000)
Disposal Group, Not Discontinued Operations | Russia and Ukraine Divestment | North American Records and Information Management Business
Gross amount of goodwill [Roll Forward]
Goodwill allocated to divested operations					0
Disposal Group, Not Discontinued Operations | Russia and Ukraine Divestment | North American Data Management Business
Gross amount of goodwill [Roll Forward]
Goodwill allocated to divested operations					0
Disposal Group, Not Discontinued Operations | Russia and Ukraine Divestment | Western European Business
Gross amount of goodwill [Roll Forward]
Goodwill allocated to divested operations					0
Disposal Group, Not Discontinued Operations | Russia and Ukraine Divestment | Other International Business
Gross amount of goodwill [Roll Forward]
Goodwill allocated to divested operations					(3,515,000)
Disposal Group, Not Discontinued Operations | Russia and Ukraine Divestment | Global Data Center Business
Gross amount of goodwill [Roll Forward]
Goodwill allocated to divested operations					0
Disposal Group, Not Discontinued Operations | Russia and Ukraine Divestment | Corporate and Other Business
Gross amount of goodwill [Roll Forward]
Goodwill allocated to divested operations					$ 0
Disposal Group, Not Discontinued Operations | IMFS
Gross amount of goodwill [Roll Forward]
Goodwill allocated to divested operations				(1,202,000)
Disposal Group, Not Discontinued Operations | IMFS | North American Records and Information Management Business
Gross amount of goodwill [Roll Forward]
Goodwill allocated to divested operations				(1,202,000)
Disposal Group, Not Discontinued Operations | IMFS | North American Data Management Business
Gross amount of goodwill [Roll Forward]
Goodwill allocated to divested operations				0
Disposal Group, Not Discontinued Operations | IMFS | Western European Business
Gross amount of goodwill [Roll Forward]
Goodwill allocated to divested operations				0
Disposal Group, Not Discontinued Operations | IMFS | Other International Business
Gross amount of goodwill [Roll Forward]
Goodwill allocated to divested operations				0
Disposal Group, Not Discontinued Operations | IMFS | Global Data Center Business
Gross amount of goodwill [Roll Forward]
Goodwill allocated to divested operations				0
Disposal Group, Not Discontinued Operations | IMFS | Corporate and Other Business
Gross amount of goodwill [Roll Forward]
Goodwill allocated to divested operations				$ 0

Summary of Significant Accou_11

Summary of Significant Accounting Policies - Customer Relationships and Acquisition Costs and Other Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Amortizable intangible assets
Net Carrying Amount	$ 1,506,522	$ 1,400,547
Amortization	186,774	116,093	$ 86,800
Amortization Expense Included In Depreciation And Amortization
Estimated amortization expense for existing intangible assets for the next five succeeding fiscal years
2,019	160,048
2,020	155,324
2,021	151,546
2,022	121,459
2,023	118,586
Thereafter	800,248
Customer relationship intangible assets
Amortizable intangible assets
Gross Carrying Amount	1,718,919	1,704,105
Accumulated Amortization	(455,705)	(395,278)
Net Carrying Amount	$ 1,263,214	1,308,827
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 relationship intangible assets | Weighted Average
Amortizable intangible assets
Useful life of finite-lived intangible assets	18 years
Customer Inducements
Amortizable intangible assets
Useful life of finite-lived intangible assets	3 years
Gross Carrying Amount	$ 56,478	140,030
Accumulated Amortization	(34,181)	(66,981)
Net Carrying Amount	$ 22,297	73,049
Customer Inducements | Minimum
Amortizable intangible assets
Remaining amortization period	10 years
Customer Inducements | Maximum
Amortizable intangible assets
Remaining amortization period	30 years
Customer Relationships Current Record Management Vendor Or Payments To Customers | Weighted Average
Amortizable intangible assets
Useful life of finite-lived intangible assets	7 years
Data center in-place leases | Weighted Average
Amortizable intangible assets
Remaining amortization period	6 years
Data center tenant relationships | Weighted Average
Amortizable intangible assets
Remaining amortization period	9 years
Customer Inducements, Current Record Management Vendor Or Payments To Customers | Minimum
Amortizable intangible assets
Remaining amortization period	5 years
Customer Inducements, Current Record Management Vendor Or Payments To Customers | Maximum
Amortizable intangible assets
Remaining amortization period	15 years
Customer-Related Intangible Assets
Amortizable intangible assets
Amortization	$ 113,782	109,563	84,349
Leases Acquired In Place and Tenant Relationships [Member]
Amortizable intangible assets
Amortization	$ 43,061	0	0
Data Center Above Market Leases | Weighted Average
Amortizable intangible assets
Remaining amortization period	4 years
Data Center Below Market Leases | Weighted Average
Amortizable intangible assets
Remaining amortization period	9 years
Other Intangible Assets
Amortizable intangible assets
Gross Carrying Amount	$ 20,310	20,929
Accumulated Amortization	(14,798)	(10,728)
Net Carrying Amount	5,512	10,201
Amortization	$ 4,624	6,530	2,451
Other Intangible Assets | Weighted Average
Amortizable intangible assets
Useful life of finite-lived intangible assets	4 years
Third-party Commissions Asset
Amortizable intangible assets
Gross Carrying Amount	$ 30,071	0
Accumulated Amortization	(1,089)	0
Net Carrying Amount	28,982	0
Amortization	1,089	0	0
Permanent Withdrawal Fees
Amortizable intangible assets
Amortization	11,408	11,253	12,217
Permanent Withdrawal Fees | Amortization Expense Charged To Revenues
Estimated amortization expense for existing intangible assets for the next five succeeding fiscal years
2,019	7,386
2,020	5,705
2,021	3,792
2,022	1,667
2,023	1,192
Thereafter	1,387
Data Center Above and Below Market Leases
Amortizable intangible assets
Amortization	4,873	0	$ 0
Data Center Above and Below Market Leases | Amortization Expense Charged To Revenues
Estimated amortization expense for existing intangible assets for the next five succeeding fiscal years
2,019	4,332
2,020	1,260
2,021	676
2,022	157
2,023	(523)
Thereafter	(3,902)
Data Center
Amortizable intangible assets
Gross Carrying Amount	271,818	19,314
Accumulated Amortization	(50,807)	(643)
Net Carrying Amount	221,011	18,671
Gross Carrying Amount	12,318	0
Accumulated Amortization	1,642	0
Net Carrying Amount	10,676	0
Customer Relationships, Customer Inducements and Data Center
Amortizable intangible assets
Gross Carrying Amount	2,077,286	1,863,449
Accumulated Amortization	(541,782)	(462,902)
Net Carrying Amount	$ 1,535,504	$ 1,400,547

Summary of Significant Accou_12

Summary of Significant Accounting Policies - Deferred Financing Costs (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accounting Policies [Abstract]
Gross deferred financing costs	$ 128,469	$ 113,678
Accumulated amortization of deferred financing costs	41,862	$ 27,438
Deferred Financing Costs, Amortization Expense, Rolling Maturity [Abstract]
2,019	15,544
2,020	15,396
2,021	14,272
2,022	13,227
2,023	10,108
Thereafter	$ 18,060

Summary of Significant Accou_13

Summary of Significant Accounting Policies - Prepaid Expenses and Accrued Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accounting Policies [Abstract]
Minimum percentage of current assets and liabilities required to be disclosed separately	5.00%	5.00%
Interest	$ 83,854	$ 71,176
Payroll and vacation	65,846	67,379
Incentive compensation	75,256	72,006
Sales tax and VAT payable	96,564	63,725
Dividend	181,986	172,102
Other	249,178	206,758
Accrued expenses	$ 752,684	$ 653,146

Summary of Significant Accou_14

Summary of Significant Accounting Policies - Revenue - Narrative (Details) - USD ($) $ in Thousands

3 Months Ended

12 Months Ended

Dec. 31, 2018

Sep. 30, 2018

Jun. 30, 2018

Mar. 31, 2018

Dec. 31, 2017

Sep. 30, 2017

Jun. 30, 2017

Mar. 31, 2017

Dec. 31, 2018

Dec. 31, 2017

Dec. 31, 2016

Jan. 01, 2018

Capitalized Contract Cost [Line Items]

Percentage Of Revenue From Sales Of Products

2.00%

Amortization

$ 10,380

$ 13,838

Revenues

$ 1,061,489

$ 1,060,991

$ 1,060,823

$ 1,042,458

$ 991,235

$ 965,661

$ 949,806

$ 938,876

$ 4,225,761

3,845,578

$ 3,511,453

Intake Costs

Capitalized Contract Cost [Line Items]

Capitalized contract cost, amortization period

3 years

3 years

Commissions

Capitalized Contract Cost [Line Items]

Capitalized contract cost, amortization period

3 years

3 years

Contract term

1 year

Storage rental

Capitalized Contract Cost [Line Items]

Revenues

$ 2,622,455

2,377,557

2,142,905

Accounting Standards Update 2014-09

Capitalized Contract Cost [Line Items]

Decrease to stockholders' equity

$ 30,233

Global Data Center Business

Capitalized Contract Cost [Line Items]

Revenues

228,983

37,694

24,249

Global Data Center Business | Operating Segments

Capitalized Contract Cost [Line Items]

Revenues

228,983

37,694

24,249

Global Data Center Business | Operating Segments | Storage rental

Capitalized Contract Cost [Line Items]

Revenues

218,675

$ 35,839

$ 22,026

Global Data Center Business | Operating Segments | Power and connectivity

Capitalized Contract Cost [Line Items]

Revenues

$ 38,800

Summary of Significant Accou_15

Summary of Significant Accounting Policies - Revenue - Contract Fulfillment Costs (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Jan. 01, 2018
Intake Costs asset
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Gross Carrying Amount	$ 39,748
Accumulated Amortization	(24,504)
Net Carrying Amount	15,244
Commissions
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Gross Carrying Amount	58,424
Accumulated Amortization	(34,637)
Net Carrying Amount	$ 23,787
Accounting Standards Update 2014-09 | Intake Costs asset
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Gross Carrying Amount		$ 31,604
Accumulated Amortization		(14,954)
Net Carrying Amount		16,650
Accounting Standards Update 2014-09 | Commissions
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Gross Carrying Amount		42,072
Accumulated Amortization		(21,173)
Net Carrying Amount		$ 20,899

Summary of Significant Accou_16

Summary of Significant Accounting Policies - Estimated Amortization Expense for Contract Fulfillment Costs (Details) $ in Thousands	Dec. 31, 2018USD ($)
Accounting Policies [Abstract]
2,019	$ 21,227
2,020	12,526
2,021	$ 5,278

Summary of Significant Accou_17

Summary of Significant Accounting Policies - Revenue - Summary of Deferred Revenue Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Deferred revenue - Current	$ 264,823	$ 241,590
Deferred revenue - Long-term	111,331	73,039
Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Deferred revenue - Current		241,590
Deferred revenue - Long-term	$ 26,401	$ 0

Summary of Significant Accou_18

Summary of Significant Accounting Policies - Revenue - Remaining Performance Obligation (Details)	Dec. 31, 2018
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Percentage of deferred revenue expected to be recognized	91.00%

Summary of Significant Accou_19

Summary of Significant Accounting Policies - Revenue - Summary of Condensed Consolidated Statements of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues	$ 1,061,489	$ 1,060,991	$ 1,060,823	$ 1,042,458	$ 991,235	$ 965,661	$ 949,806	$ 938,876	$ 4,225,761	$ 3,845,578	$ 3,511,453
Operating income (loss)	191,844	195,746	203,359	164,559	154,405	176,756	170,194	147,755	755,508	649,109	501,606
Income from Continuing Operations	$ 158,831	$ 78,628	$ 93,903	$ 45,614	$ 24,349	$ 25,382	$ 83,148	$ 58,844	$ 376,976	$ 191,723	$ 103,880
Income (Loss) from Continuing Operations (in dollars per share)	$ 0.55	$ 0.28	$ 0.33	$ 0.16	$ 0.09	$ 0.10	$ 0.31	$ 0.22	$ 1.31	$ 0.71	$ 0.41
Income (Loss) from Continuing Operations - Diluted (in dollars per share)	$ 0.55	$ 0.27	$ 0.33	$ 0.16	$ 0.09	$ 0.10	$ 0.30	$ 0.22	$ 1.31	$ 0.71	$ 0.41
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues									$ 4,219,663
Operating income (loss)									751,648
Income from Continuing Operations									$ 373,113
Income (Loss) from Continuing Operations (in dollars per share)									$ 1.30
Income (Loss) from Continuing Operations - Diluted (in dollars per share)									$ 1.30

Summary of Significant Accou_20

Summary of Significant Accounting Policies - Revenue - Data Center (Details) $ in Thousands	Dec. 31, 2018USD ($)
Accounting Policies [Abstract]
2,019	$ 178,196
2,020	138,216
2,021	92,724
2,022	71,784
2,023	$ 57,882

Summary of Significant Accou_21

Summary of Significant Accounting Policies - Stock-Based Compensation and Income Taxes (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)offering_period$ / sharesshares	Dec. 31, 2017USD ($)$ / sharesshares	Dec. 31, 2016USD ($)$ / sharesshares
Employee stock-based awards
Stock-based compensation | $	$ 31,167	$ 30,019	$ 28,976
Stock-based compensation expense (income), net of tax | $	$ 28,998	$ 26,512	$ 22,364
Stock-based compensation expense per basic and diluted share (in dollars per share) | $ / shares	$ 0.10	$ 0.10	$ 0.09
Certain options as a percentage of total outstanding options	100.00%
Total amount of shares of common stock reserved and available for issuance pursuant to awards granted under the 2014 Plan (in shares)	48,253,839
Summary of option activity
Options outstanding balance, end of period (in shares)	4,271,834
Employee Stock Purchase Plan
Employee stock purchase plan, shares available for grant	6,053,429
Employee stock-based awards, unrecognized compensation costs on nonvested awards | $	$ 43,248
Employee stock-based awards, weighted average recognition period	1 year 10 months 17 days
Share-based Compensation Award, Tranche Two
Employee stock-based awards
Certain options as a percentage of total outstanding options	7.20%
Summary of option activity
Options outstanding balance, end of period (in shares)	306,816
Share-based Compensation Award, Tranche One
Employee stock-based awards
Certain options as a percentage of total outstanding options	92.80%
Summary of option activity
Options outstanding balance, end of period (in shares)	3,965,018
Continuing Operations
Employee stock-based awards
Stock-based compensation | $	$ 31,167	$ 30,019	$ 28,976
Continuing Operations | Cost of sales (excluding depreciation and amortization)
Employee stock-based awards
Stock-based compensation | $	119	108	110
Continuing Operations | Selling, general and administrative expenses
Employee stock-based awards
Stock-based compensation | $	$ 31,048	$ 29,911	28,866
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)	717,878
Granted (in shares)	353,507
Vested (in shares)	(81,305)
Forfeited (in shares)	(23,031)
Non-vested at the end of the period (in shares)	967,049	717,878
Restricted Stock Units (RSUs)
Dividends accrued and paid
Accrued cash dividends | $	$ 2,899	$ 2,590	2,525
Cash dividends paid | $	2,477	2,370	2,363
Total fair value of shares or units vested | $	$ 20,454	$ 19,825	22,236
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)	(250,067)
Granted (in shares)	0
Vested (in shares)	0
Forfeited (in shares)	(49,881)
Non-vested at the end of the period (in shares)	(299,948)	(250,067)
Performance Shares [Member]
Dividends accrued and paid
Accrued cash dividends | $	$ 1,804	$ 1,290	1,078
Cash dividends paid | $	644	205	645
Total fair value of shares or units vested | $	$ 3,117	$ 1,242	$ 5,748
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options
Non-vested at the beginning of the period (in shares)	467,811
Granted (in shares)	353,507
Vested (in shares)	(81,305)
Forfeited (in shares)	(72,912)
Non-vested at the end of the period (in shares)	667,101	467,811
Weighted average grant date fair value
Weighted average grant date fair value, non-vested, beginning of period (in dollars per share) | $ / shares	$ 39.28
Weighted average grant date fair value, granted (in dollars per share) | $ / shares	33.64
Weighted average grant date fair value, vested (in dollars per share) | $ / shares	38.34
Weighted average grant date fair value, forfeited (in dollars per share) | $ / shares	38.01
Weighted average grant date fair value, non-vested, end of period (in dollars per share) | $ / shares	$ 36.54	$ 39.28
Performance units disclosure
Period of anniversary from the date of grant	3 years
Qualifying age for grant of performance units	55 years
Qualifying service period	10 years
Performance Shares [Member] | Two Thousand Sixteen
Performance units disclosure
Percentage of achievement of the predefined revenue and ROIC targets	65.00%
Performance Shares [Member] | Two Thousand Seventeen
Performance units disclosure
Percentage of achievement of the predefined revenue and ROIC targets	100.00%
Performance Shares [Member] | Two Thousand Eighteen
Performance units disclosure
Percentage of achievement of the predefined revenue and ROIC targets	100.00%
Performance Shares [Member] | Revenue or revenue growth and return on invested capital
Performance units disclosure
Performance period	3 years
Performance Shares [Member] | Market condition associated with shareholder return of common stock
Performance units disclosure
Performance period	3 years
Performance Shares [Member] | Minimum | Predefined Targets Of Revenue And Return On Invested Capital Or Adjusted EBITDA [Member]
Performance units disclosure
Percentage payout rate	0.00%
Performance Shares [Member] | Minimum | Market condition associated with shareholder return of common stock
Performance units disclosure
Percentage payout rate	0.00%
Performance Shares [Member] | Maximum | Predefined Targets Of Revenue And Return On Invested Capital Or Adjusted EBITDA [Member]
Performance units disclosure
Percentage payout rate	200.00%
Performance Shares [Member] | Maximum | Market condition associated with shareholder return of common stock
Performance units disclosure
Percentage payout rate	200.00%
Employee Stock Purchase Plan
Employee Stock Purchase Plan
Employee stock purchase plan, number of offering periods | offering_period	2
Employee stock purchase plan, duration of offering periods	6 months
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	119,123	102,826	110,835
Employee stock purchase plan, shares available for grant	505,645
Three Year Vesting Option [Member]
Employee stock-based awards
Award vesting period	3 years
Contractual term of awards	10 years
Five Year Vesting Option [Member]
Employee stock-based awards
Award vesting period	5 years
Contractual term of awards	10 years
Stock And Cash Incentive Plan2014 [Member]
Employee stock-based awards
Total amount of shares 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 [Member]
Employee stock-based awards
Weighted average fair value of options granted (in dollars per share) | $ / shares	$ 3.50	$ 4.28	$ 2.56
Weighted average assumptions used for grants
Expected volatility (as a percent)	25.40%	25.70%	27.20%
Risk-free interest rate (as a percent)	2.65%	1.96%	1.32%
Expected dividend yield (as a percent)	7.00%	6.00%	7.00%
Expected life of the option	5 years	5 years	5 years 7 months 6 days
Summary of option activity
Options outstanding balance, beginning of period (in shares)	3,671,740
Options granted (in shares)	846,517
Options exercised (in shares)	(182,607)
Options forfeited (in shares)	(47,754)
Options expired (in shares)	(16,062)
Options outstanding balance, end of period (in shares)	4,271,834	3,671,740
Options exercisable balance (in shares)	2,393,010
Options expected to vest (in shares)	1,808,321
Weighted Average Exercise Price
Weighted average exercise price, options outstanding balance beginning of period (in dollars per share) | $ / shares	$ 34.41
Weighted average exercise price, options granted (in dollars per share) | $ / shares	33.71
Weighted average exercise price, options exercised (in dollars per share) | $ / shares	22.36
Weighted average exercise price, options forfeited (in dollars per share) | $ / shares	34.69
Weighted average exercise price, options expired (in dollars per share) | $ / shares	34.69
Weighted average exercise price, options outstanding balance end of period (in dollars per share) | $ / shares	34.78	$ 34.41
Weighted average exercise price, options exercisable (in dollars per share) | $ / shares	34.51
Weighted average exercise price, options expected to vest (in dollars per share) | $ / shares	$ 35.10
Weighted average remaining contractual term
Weighted average remaining contractual term, options outstanding	7 years 11 days
Weighted average remaining contractual term, options exercisable	5 years 11 months 19 days
Weighted average remaining contractual term, options expected to vest	8 years 4 months 10 days
Aggregate intrinsic value
Aggregate intrinsic value, options outstanding | $	$ 6,066
Aggregate intrinsic value, options exercisable | $	5,785
Aggregate intrinsic value, options expected to vest | $	279
Aggregate intrinsic value of stock options exercised
Aggregate intrinsic value of stock options exercised | $	$ 2,181	$ 8,485	$ 18,298
Restricted Stock And Restricted Stock Units [Member]
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)	1,071,469
Granted (in shares)	814,659
Vested (in shares)	(582,687)
Forfeited (in shares)	(106,875)
Non-vested at the end of the period (in shares)	1,196,566	1,071,469
Weighted average grant date fair value
Weighted average grant date fair value, non-vested, beginning of period (in dollars per share) | $ / shares	$ 35.38
Weighted average grant date fair value, granted (in dollars per share) | $ / shares	33.59
Weighted average grant date fair value, vested (in dollars per share) | $ / shares	35.10
Weighted average grant date fair value, forfeited (in dollars per share) | $ / shares	34.92
Weighted average grant date fair value, non-vested, end of period (in dollars per share) | $ / shares	$ 34.33	$ 35.38
Performance Units Original Awards
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options
Granted (in shares)		229,692	231,672

Summary of Significant Accou_22

Summary of Significant Accounting Policies - Income (Loss) Per Share - Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income (Loss) Per Share-Basic and Diluted
Income from Continuing Operations	$ 158,831	$ 78,628	$ 93,903	$ 45,614	$ 24,349	$ 25,382	$ 83,148	$ 58,844	$ 376,976	$ 191,723	$ 103,880
Less: Net income (loss) attributable to noncontrolling interests									1,198	1,611	2,409
Income (loss) from continuing operations (utilized in numerator of Earnings Per Share calculation)									375,778	190,112	101,471
Income (loss) from discontinued operations, net of tax	0	(11,605)	(360)	(462)	(2,870)	(1,058)	(2,026)	(337)	(12,427)	(6,291)	3,353
Net Income (Loss) Attributable to Iron Mountain Incorporated	$ 158,118	$ 67,148	$ 93,401	$ 44,684	$ 22,721	$ 24,345	$ 78,630	$ 58,125	$ 363,351	$ 183,821	$ 104,824
Weighted-average shares—basic (in shares)									285,913,000	265,898,000	246,178,000
Effect of dilutive potential stock options (in shares)									234,558	431,071	574,954
Effect of dilutive potential RSUs and PUs (in shares)									505,030	509,235	514,044
Effect of Over-Allotment Option (in shares)									0	6,278	0
Weighted-average shares—diluted (in shares)									286,652,588	266,844,584	247,266,998
Earnings (Losses) per share-basic:
Income (Loss) from Continuing Operations (in dollars per share)	$ 0.55	$ 0.28	$ 0.33	$ 0.16	$ 0.09	$ 0.10	$ 0.31	$ 0.22	$ 1.31	$ 0.71	$ 0.41
Income (loss) from discontinued operations, net of tax (in dollars per share)	0	(0.04)	0	0	(0.01)	0	(0.01)	0	(0.04)	(0.02)	0.01
Net Income (Loss) Attributable to Iron Mountain Incorporated (in dollars per share)	0.55	0.23	0.33	0.16	0.08	0.09	0.30	0.22	1.27	0.69	0.43
Earnings (Losses) per share-diluted:
Income (Loss) from Continuing Operations (in dollars per share)	0.55	0.27	0.33	0.16	0.09	0.10	0.30	0.22	1.31	0.71	0.41
Income (loss) from discontinued operations, net of tax (in dollars per share)	0	(0.04)	0	0	(0.01)	0	(0.01)	0	(0.04)	(0.02)	0.01
Net Income (Loss) Attributable to Iron Mountain Incorporated (in dollars per share)	$ 0.55	$ 0.23	$ 0.33	$ 0.16	$ 0.08	$ 0.09	$ 0.30	$ 0.22	$ 1.27	$ 0.69	$ 0.42
Antidilutive stock options, RSUs and PUs, excluded from the calculation (in shares)									3,258,078	2,326,344	1,790,362

Summary of Significant Accou_23

Summary of Significant Accounting Policies - Allowance for Doubtful Accounts and Credit Memo Reserves (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Valuation Allowance [Line Items]
The general period to charge-off uncollectible balances of receivable, as circumstances warrant, is no later than this period of time past due	1 year
SEC Schedule, 12-09, Allowance, Credit Loss
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of the Year	$ 46,648	$ 44,290	$ 31,447
Credit Memos Charged to Revenue	36,329	38,966	37,616
Allowance for Bad Debts Charged to Expense	18,625	14,826	8,705
Other	(1,568)	1,905	16,528
Deductions	(56,450)	(53,339)	(50,006)
Balance at End of the Year	$ 43,584	$ 46,648	$ 44,290

Summary of Significant Accou_24

Summary of Significant Accounting Policies - Concentration of Credit Risk (Details)	12 Months Ended
	Dec. 31, 2018USD ($)bankfund	Dec. 31, 2017USD ($)bankfund	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
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	0	12
Number of global banks with cash, cash equivalent and restricted cash held on deposit | bank	7	7
Money market funds	$ 0	$ 585,000,000
Maximum investment limit in any one financial institution	50,000,000
Cash and cash equivalents	$ 165,485,000	925,699,000	$ 236,484,000	$ 128,381,000
Time deposits		$ 24,482,000
Investment in single mutual fund | Credit Concentration Risk
Cash and Cash Equivalents [Line Items]
Concentration risk percentage	1.00%

Summary of Significant Accou_25

Summary of Significant Accounting Policies - Fair Value Measurements (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Assets and liabilities carried at fair value measured on a recurring basis
Money Market Funds	$ 0	$ 585,000,000
Time Deposits		24,482,000
Fair Value, Measurements, Recurring | Quoted prices in active markets (Level 1)
Assets and liabilities carried at fair value measured on a recurring basis
Money Market Funds		0
Time Deposits	0	0
Trading Securities	10,248,000	11,279,000
Derivative Assets	0	0
Derivative Liabilities		0
Interest Rate Swap Agreements Liabilities	0
Fair Value, Measurements, Recurring | Significant other observable inputs (Level 2)
Assets and liabilities carried at fair value measured on a recurring basis
Money Market Funds		585,000,000
Time Deposits	956,000	24,482,000
Trading Securities	505,000	505,000
Derivative Assets	93,000	1,579,000
Derivative Liabilities		2,329,000
Interest Rate Swap Agreements Liabilities	973,000
Fair Value, Measurements, Recurring | Significant unobservable inputs (Level 3)
Assets and liabilities carried at fair value measured on a recurring basis
Money Market Funds		0
Time Deposits	0	0
Trading Securities	0	0
Derivative Assets	0	0
Derivative Liabilities		0
Interest Rate Swap Agreements Liabilities	0
Fair Value, Measurements, Recurring | Estimated Fair Value
Assets and liabilities carried at fair value measured on a recurring basis
Money Market Funds		585,000,000
Time Deposits	956,000	24,482,000
Trading Securities	10,753,000	11,784,000
Derivative Assets	93,000	1,579,000
Derivative Liabilities		$ 2,329,000
Interest Rate Swap Agreements Liabilities	$ 973,000

Summary of Significant Accou_26

Summary of Significant Accounting Policies - Accumulated Other Comprehensive Income, Other Expenses, and Change in Accounting Pronouncements (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	May 30, 2017
Other comprehensive loss:
Stockholders' equity, beginning balance	$ 2,297,438,000
Foreign currency translation adjustments	(160,702,000)	$ 108,584,000	$ (36,922,000)
Market value adjustments for securities			(734,000)
Fair value adjustments for interest rate swap agreements	(973,000)
Total Other comprehensive (loss) income	(161,675,000)	108,584,000	(37,656,000)
Stockholders' equity, ending balance	1,884,180,000	2,297,438,000
Foreign Currency Translation Adjustments
Other comprehensive loss:
Stockholders' equity, beginning balance	(103,989,000)	(212,573,000)	(175,651,000)
Foreign currency translation adjustments	(160,702,000)	108,584,000	(36,922,000)
Market value adjustments for securities			0
Fair value adjustments for interest rate swap agreements	0
Total Other comprehensive (loss) income	(160,702,000)	108,584,000	(36,922,000)
Stockholders' equity, ending balance	(264,691,000)	(103,989,000)	(212,573,000)
Market Value Adjustments for Securities
Other comprehensive loss:
Stockholders' equity, beginning balance	0	0	734,000
Foreign currency translation adjustments	0	0	0
Market value adjustments for securities			(734,000)
Fair value adjustments for interest rate swap agreements	0
Total Other comprehensive (loss) income	0	0	(734,000)
Stockholders' equity, ending balance	0	0	0
Fair Value Adjustments for Interest Rate Swap Agreements
Other comprehensive loss:
Stockholders' equity, beginning balance	0	0	0
Foreign currency translation adjustments	0	0	0
Market value adjustments for securities			0
Fair value adjustments for interest rate swap agreements	(973,000)
Total Other comprehensive (loss) income	(973,000)	0	0
Stockholders' equity, ending balance	(973,000)	0	0
Accumulated Other Comprehensive Items, Net
Other comprehensive loss:
Stockholders' equity, beginning balance	(103,989,000)	(212,573,000)	(174,917,000)
Stockholders' equity, ending balance	$ (265,664,000)	(103,989,000)	$ (212,573,000)
Disposal Group, Not Discontinued Operations | Russia and Ukraine Divestment
Other comprehensive loss:
Cumulative translation adjustment		$ 29,100,000		$ 29,100,000

Summary of Significant Accou_27

Summary of Significant Accounting Policies - Other Expense (Income), Net (including Foreign Currency) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Foreign currency transaction losses (gains), net		$ (15,567)	$ 43,248	$ 20,413
Debt extinguishment expense, net		0	78,368	9,283
Other, net		3,875	(42,187)	14,604
Other (Income) Expense, Net		(11,692)	79,429	44,300
Loss on disposition		0	0	16,838
Gain on divestiture		$ 0	38,869	0
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Australia Divestment Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on disposition				15,417
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Iron Mountain Canadian Divestments
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on disposition				$ 1,421
Disposal Group, Not Discontinued Operations | Russia and Ukraine Divestment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on divestiture	$ 38,869		$ 38,869

Summary of Significant Accou_28

Summary of Significant Accounting Policies - New Accounting Pronouncements (Details) - Subsequent Event - ASU 2016-02 $ in Thousands	Jan. 01, 2019USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use assets, difference from operating liabilities	$ 100,000
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, liabilities	1,750,000
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, liabilities	$ 1,950,000

Derivative Instruments and He_3

Derivative Instruments and Hedging Activities (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)	Dec. 31, 2018EUR (€)	Dec. 31, 2017USD ($)	Dec. 31, 2017EUR (€)	Dec. 31, 2017CAD ($)	Dec. 31, 2016EUR (€)
Derivative [Line Items]
Unrealized loss associated with interest rate swap agreements	$ 973,000
Net investment | 6 3/4% Notes | Designated Hedging Instruments
Derivative [Line Items]
Notional amount of derivatives | €		€ 224,424,000		€ 103,682,000		€ 29,649,000
Cumulative net investment hedge gains (losses) recorded in accumulated other comprehensive items, net	14,258,000
Interest Rate Swap | Designated Hedging Instruments
Derivative [Line Items]
Notional amount of derivatives	350,000,000
Purchases | Foreign exchange contracts
Derivative [Line Items]
Notional amount of derivatives | €		€ 29,000,000		135,000,000
Purchases | Foreign Exchange Forward - Option Two
Derivative [Line Items]
Notional amount of derivatives			$ 114,390,000
Purchases | Foreign Exchange Forward - Option One
Derivative [Line Items]
Notional amount of derivatives			138,823,000
Sales | Foreign exchange contracts
Derivative [Line Items]
Amount of hedged item	33,374,000		$ 160,757,000
Sales | Foreign Exchange Forward - Option Two
Derivative [Line Items]
Amount of hedged item | €				€ 96,150,000
Sales | Foreign Exchange Forward - Option One
Derivative [Line Items]
Amount of hedged item					$ 176,000
Other Noncurrent Liabilities | Interest Rate Swap
Derivative [Line Items]
Derivative liability	973,000
Cumulative unrealized losses within accumulated other comprehensive items, net	$ 973,000

Derivative Instruments and He_4

Derivative Instruments and Hedging Activities - Fair Value of Derivatives (Details) - Derivatives Not Designated as Hedging Instruments - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Prepaid expenses and other
Fair value of derivative instruments
Derivative assets	$ 93	$ 1,579
Accrued expenses
Fair value of derivative instruments
Derivative liabilities	$ 0	$ 2,329

Derivative Instruments and He_5

Derivative Instruments and Hedging Activities Derivative Instruments and Hedging Activities - Net Cash (Receipts) Payments Included In Cash From Operating Activities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Foreign exchange contracts
Derivative [Line Items]
Net (receipts) payments	$ 5,797	$ (9,073)	$ 0

Derivative Instruments and He_6

Derivative Instruments and Hedging Activities - Amount of (Gain) Loss in Income on Derivatives (Details) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Derivatives Not Designated as Hedging Instruments
Derivative [Line Items]
(Gains) losses for derivative instruments	$ 4,954	$ (8,292)	$ 0

Derivative Instruments and He_7

Derivative Instruments and Hedging Activities - Schedule of Foreign Exchange Gains Related to Fair of Debt (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Foreign exchange gains (losses)	$ 11,070	$ (15,015)	$ 1,107

Debt - Schedule of Long Term De

Debt - Schedule of Long Term Debt (Details) € in Thousands, £ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands	Dec. 31, 2018USD ($)	Dec. 31, 2018AUD ($)	Mar. 27, 2018AUD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2017AUD ($)	Nov. 30, 2017GBP (£)	Sep. 30, 2017USD ($)	Aug. 21, 2017USD ($)	May 31, 2017EUR (€)	Sep. 30, 2016CAD ($)	Sep. 28, 2016AUD ($)	May 31, 2016USD ($)
Debt Instrument [Line Items]
Debt (inclusive of discount)	$ 8,229,430			$ 7,129,511
Unamortized Deferred Financing Costs	(86,607)			(86,240)
Total Long-term Debt (including current portion)	8,142,823			7,043,271
Debt, current portion	(126,406)			(146,300)
Unamortized deferred financing costs, current portion	0			0
Carrying amount, current portion	(126,406)			(146,300)
Long-term debt, net of current portion	8,103,024			6,983,211
Unamortized deferred financing costs	(86,607)			(86,240)
Long-term debt, net of current portion	$ 8,016,417			6,896,971
Capital stock of subsidiaries pledged to secure debt (as a percent)	66.00%	66.00%
Unamortized original issue discount	$ 3,271
Ownership in U.S. subsidiaries that are considered guarantor (as a percent)	100.00%	100.00%
Capital lease obligations	$ 447,173			436,285
Revolving Credit Facility | New Credit Agreement
Debt Instrument [Line Items]
Debt (inclusive of discount)	793,832			466,593
Unamortized Deferred Financing Costs	(14,117)			(14,407)
Total Long-term Debt (including current portion)	779,715			452,186
Fair Value	793,832			466,593
Revolving Credit Facility | UK Bilateral Revolving Credit Facility
Debt Instrument [Line Items]
Debt (inclusive of discount)	178,299			0
Unamortized Deferred Financing Costs	(2,357)			0
Total Long-term Debt (including current portion)	175,942			0
Fair Value	178,299			0
Term Loan Facility | New Credit Agreement
Debt Instrument [Line Items]
Debt (inclusive of discount)								$ 250,000
Term Loan Facility | Term Loan A
Debt Instrument [Line Items]
Debt (inclusive of discount)	240,625			243,750
Unamortized Deferred Financing Costs	0			0
Total Long-term Debt (including current portion)	240,625			243,750
Fair Value	240,625			243,750
Term Loan Facility | Term Loan B
Debt Instrument [Line Items]
Debt (inclusive of discount)	693,169			0
Unamortized Deferred Financing Costs	(8,742)			0
Total Long-term Debt (including current portion)	684,427			0
Fair Value	660,013			0
Unamortized original issue discount	1,581
Australian Dollar Term Loan
Debt Instrument [Line Items]
Debt (inclusive of discount)	233,955		$ 350,000	187,504							$ 250,000
Unamortized Deferred Financing Costs	(3,084)			(3,382)
Total Long-term Debt (including current portion)	230,871			184,122
Fair Value	235,645	$ 334,063		189,049	$ 242,188
Unamortized original issue discount	1,690			1,545
Senior Notes 4.375 Percent due 2021
Debt Instrument [Line Items]
Debt (inclusive of discount)	500,000			500,000								$ 500,000
Unamortized Deferred Financing Costs	(4,155)			(5,874)
Total Long-term Debt (including current portion)	495,845			494,126
Fair Value	$ 488,750			507,500
Stated interest rate (as a percent)	4.375%	4.375%
Senior Notes 6 Percent Due 2023
Debt Instrument [Line Items]
Debt (inclusive of discount)	$ 600,000			600,000
Unamortized Deferred Financing Costs	(5,126)			(6,224)
Total Long-term Debt (including current portion)	594,874			593,776
Fair Value	$ 606,000			625,500
Stated interest rate (as a percent)	6.00%	6.00%
CAD 5.375 Percent Senior Notes due 2023
Debt Instrument [Line Items]
Debt (inclusive of discount)	$ 183,403			199,171						$ 250,000
Unamortized Deferred Financing Costs	(2,506)			(3,295)
Total Long-term Debt (including current portion)	180,897			195,876
Fair Value	$ 186,154			208,631
Stated interest rate (as a percent)	5.375%	5.375%
Senior Subordinated Notes 5.75 Percent due 2024
Debt Instrument [Line Items]
Debt (inclusive of discount)	$ 1,000,000			1,000,000
Unamortized Deferred Financing Costs	(7,782)			(9,156)
Total Long-term Debt (including current portion)	992,218			990,844
Fair Value	$ 940,000			1,012,500
Stated interest rate (as a percent)	5.75%	5.75%
Euro Notes 3 Percent due 2025
Debt Instrument [Line Items]
Debt (inclusive of discount)	$ 343,347			359,386					€ 300,000
Unamortized Deferred Financing Costs	(4,098)			(4,691)
Total Long-term Debt (including current portion)	339,249			354,695
Fair Value	$ 321,029			364,776
Stated interest rate (as a percent)	3.00%	3.00%
GBP Notes due 2025 3.875 Percent
Debt Instrument [Line Items]
Debt (inclusive of discount)	$ 509,425			539,702		£ 400,000
Unamortized Deferred Financing Costs	(6,573)			(7,718)
Total Long-term Debt (including current portion)	502,852			531,984
Fair Value	$ 453,811			527,559
Stated interest rate (as a percent)	3.875%	3.875%
Senior Notes 5.375 Percent due 2026
Debt Instrument [Line Items]
Debt (inclusive of discount)	$ 250,000			250,000								$ 250,000
Unamortized Deferred Financing Costs	(3,185)			(3,615)
Total Long-term Debt (including current portion)	246,815			246,385
Fair Value	$ 224,375			256,875
Stated interest rate (as a percent)	5.375%	5.375%
Senior Notes 4.875 Percent due 2027
Debt Instrument [Line Items]
Debt (inclusive of discount)	$ 1,000,000			1,000,000			$ 1,000,000
Unamortized Deferred Financing Costs	(12,442)			(13,866)
Total Long-term Debt (including current portion)	987,558			986,134
Fair Value	$ 855,000			1,000,000
Stated interest rate (as a percent)	4.875%	4.875%
Senior Notes due 2028 5.25 Percent
Debt Instrument [Line Items]
Debt (inclusive of discount)	$ 825,000			825,000
Unamortized Deferred Financing Costs	(10,923)			(11,817)
Total Long-term Debt (including current portion)	814,077			813,183
Fair Value	$ 713,625			826,031
Stated interest rate (as a percent)	5.25%	5.25%
Real Estate Mortgages, Capital Leases and Other
Debt Instrument [Line Items]
Debt (inclusive of discount)	$ 606,702			649,432
Unamortized Deferred Financing Costs	(171)			(566)
Total Long-term Debt (including current portion)	606,531			648,866
Fair Value	606,702			649,432
Accounts Receivable Securitization Program
Debt Instrument [Line Items]
Debt (inclusive of discount)	221,673			258,973
Unamortized Deferred Financing Costs	(218)			(356)
Total Long-term Debt (including current portion)	221,455			258,617
Fair Value	221,673			258,973
Mortgage Securitization Program
Debt Instrument [Line Items]
Debt (inclusive of discount)	50,000			50,000
Unamortized Deferred Financing Costs	(1,128)			(1,273)
Total Long-term Debt (including current portion)	48,872			48,727
Fair Value	$ 50,000			50,000
Credit Agreement
Debt Instrument [Line Items]
Capital stock of subsidiaries pledged to secure debt (as a percent)	66.00%	66.00%
Mortgages
Debt Instrument [Line Items]
Total Long-term Debt (including current portion)	$ 18,576			$ 20,183
Stated interest rate (as a percent)	4.10%	4.10%		4.30%	4.30%
Capital Lease Obligations
Debt Instrument [Line Items]
Weighted average interest rate (as a percent)	5.70%	5.70%		4.90%	4.90%
Other Notes And Obligations
Debt Instrument [Line Items]
Total Long-term Debt (including current portion)	$ 140,953			$ 192,964
Weighted average interest rate (as a percent)	11.10%	11.10%		11.20%	11.20%

Debt - New Credit Agreement Nar

Debt - New Credit Agreement Narrative (Details) € in Thousands, $ in Thousands, $ in Thousands	Jun. 04, 2018	Aug. 21, 2017USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2018EUR (€)	Dec. 31, 2018CAD ($)	Mar. 26, 2018	Mar. 22, 2018USD ($)	Dec. 31, 2017USD ($)
Debt Instrument [Line Items]
Debt			$ 8,229,430					$ 7,129,511
New Credit Agreement
Debt Instrument [Line Items]
Average interest rate (as a percent)			3.90%	3.90%	3.90%
Revolving Credit Facility
Debt Instrument [Line Items]
Letters of credit outstanding			$ 43,297
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			$ 912,871
Revolving Credit Facility | New Credit Agreement
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 1,750,000
Debt			$ 793,832					466,593
Optional additional commitments		500,000					$ 1,260,000
Reduction in interest rate	0.25%
Average interest rate (as a percent)			3.90%	3.90%	3.90%
Term Loan Facility | New Credit Agreement
Debt Instrument [Line Items]
Debt		250,000
Amount of quarterly installments based on the original principal		$ 3,125
Average interest rate (as a percent)			4.20%	4.20%	4.20%
Term Loan Facility | Term Loan A
Debt Instrument [Line Items]
Debt			$ 240,625					243,750
Term Loan Facility | Term Loan B
Debt Instrument [Line Items]
Debt			693,169					$ 0
USD | Term Loan Facility | New Credit Agreement
Debt Instrument [Line Items]
Carrying amount on long-term debt			$ 619,800
CAD | Term Loan Facility | New Credit Agreement
Debt Instrument [Line Items]
Debt					$ 93,700
Euro | Term Loan Facility | New Credit Agreement
Debt Instrument [Line Items]
Debt | €				€ 92,000
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
Proceeds from issuance of debt			$ 689,850
Par						99.75%
Quarterly payment amount			$ 1,750
Stated interest rate (as a percent)			4.30%	4.30%	4.30%		1.75%

Debt - Notes Issued Under Inden

Debt - Notes Issued Under Indentures Narrative (Details)	1 Months Ended									3 Months Ended			12 Months Ended
	Dec. 31, 2017USD ($)	Nov. 30, 2017USD ($)	Nov. 30, 2017GBP (£)	Sep. 30, 2017USD ($)	Aug. 31, 2017USD ($)	May 30, 2017USD ($)	May 30, 2017EUR (€)	Sep. 30, 2016USD ($)	Sep. 30, 2016CAD ($)	Dec. 31, 2017USD ($)	Sep. 30, 2017USD ($)	Jun. 30, 2016USD ($)	Dec. 31, 2018USD ($)debt_instrument	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2018EUR (€)debt_instrument	Dec. 31, 2018GBP (£)debt_instrument	Dec. 31, 2018CAD ($)debt_instrument	Aug. 31, 2017CAD ($)	May 31, 2017EUR (€)	May 31, 2016USD ($)
Debt Instrument [Line Items]
Number of series of subordinated notes | debt_instrument													9			9	9	9
Debt (inclusive of discount)	$ 7,129,511,000									$ 7,129,511,000			$ 8,229,430,000	$ 7,129,511,000
Net proceeds from sales of senior notes													0	2,656,948,000	$ 925,443,000
Long-term debt	7,043,271,000									7,043,271,000			$ 8,142,823,000	7,043,271,000
Redemption price, percentage													100.00%
Repurchase price in the event of change of control, percentage of principal plus accrued and unpaid interest													101.00%			101.00%	101.00%	101.00%
Senior Notes 4.375 Percent due 2021
Debt Instrument [Line Items]
Principal Amount													$ 500,000,000
Stated interest rate (as a percent)													4.375%			4.375%	4.375%	4.375%
Debt (inclusive of discount)	500,000,000									500,000,000			$ 500,000,000	500,000,000							$ 500,000,000
Long-term debt	494,126,000									494,126,000			495,845,000	494,126,000
Senior Notes 6 Percent Due 2023
Debt Instrument [Line Items]
Principal Amount													$ 600,000,000
Stated interest rate (as a percent)													6.00%			6.00%	6.00%	6.00%
Debt (inclusive of discount)	600,000,000									600,000,000			$ 600,000,000	600,000,000
Long-term debt	593,776,000									593,776,000			$ 594,874,000	593,776,000
CAD 5.375 Percent Senior Notes due 2023
Debt Instrument [Line Items]
Principal Amount																		$ 250,000,000
Stated interest rate (as a percent)													5.375%			5.375%	5.375%	5.375%
Debt (inclusive of discount)	199,171,000								$ 250,000,000	199,171,000			$ 183,403,000	199,171,000
Net proceeds from sales of senior notes								$ 186,693,000	$ 246,250,000
Long-term debt	195,876,000									195,876,000			180,897,000	195,876,000
Senior Subordinated Notes 5.75 Percent due 2024
Debt Instrument [Line Items]
Principal Amount													$ 1,000,000,000
Stated interest rate (as a percent)													5.75%			5.75%	5.75%	5.75%
Debt (inclusive of discount)	1,000,000,000									1,000,000,000			$ 1,000,000,000	1,000,000,000
Long-term debt	990,844,000									990,844,000			$ 992,218,000	990,844,000
Euro Notes 3 Percent due 2025
Debt Instrument [Line Items]
Principal Amount | €																€ 300,000,000
Stated interest rate (as a percent)													3.00%			3.00%	3.00%	3.00%
Debt (inclusive of discount)	359,386,000									359,386,000			$ 343,347,000	359,386,000						€ 300,000,000
Net proceeds from sales of senior notes						$ 332,683,000	€ 296,250,000
Long-term debt	354,695,000									354,695,000			$ 339,249,000	354,695,000
GBP Notes due 2025 3.875 Percent
Debt Instrument [Line Items]
Principal Amount | £																	£ 400,000,000
Stated interest rate (as a percent)													3.875%			3.875%	3.875%	3.875%
Debt (inclusive of discount)	539,702,000		£ 400,000,000							539,702,000			$ 509,425,000	539,702,000
Par			100.00%
Net proceeds from sales of senior notes		$ 522,077,000	£ 395,000,000
Long-term debt	531,984,000									531,984,000			502,852,000	531,984,000
Gbp Senior Notes 6.125 Percent Due 2022
Debt Instrument [Line Items]
Redemption price, percentage		104.594%	104.594%
Aggregate principal amount outstanding										30,056,000
Senior Notes 5.375 Percent due 2026
Debt Instrument [Line Items]
Principal Amount													$ 250,000,000
Stated interest rate (as a percent)													5.375%			5.375%	5.375%	5.375%
Debt (inclusive of discount)	250,000,000									250,000,000			$ 250,000,000	250,000,000							$ 250,000,000
Long-term debt	246,385,000									246,385,000			$ 246,815,000	246,385,000
Senior Notes 4.875 Percent due 2027
Debt Instrument [Line Items]
Stated interest rate (as a percent)													4.875%			4.875%	4.875%	4.875%
Debt (inclusive of discount)	1,000,000,000			$ 1,000,000,000						1,000,000,000	$ 1,000,000,000		$ 1,000,000,000	1,000,000,000
Net proceeds from sales of senior notes				987,500,000
Long-term debt	986,134,000									986,134,000			987,558,000	986,134,000
Senior Notes due 2028 5.25 Percent
Debt Instrument [Line Items]
Principal Amount													$ 825,000,000
Stated interest rate (as a percent)													5.25%			5.25%	5.25%	5.25%
Debt (inclusive of discount)	825,000,000									825,000,000			$ 825,000,000	825,000,000
Net proceeds from sales of senior notes	814,688,000
Long-term debt	$ 813,183,000									$ 813,183,000			$ 814,077,000	$ 813,183,000
Senior Notes 5.375 Percent due 2026 & 4.375 Percent due 2021
Debt Instrument [Line Items]
Net proceeds from sales of senior notes												$ 738,750,000
CAD Notes
Debt Instrument [Line Items]
Long-term debt					$ 157,458,000														$ 200,000,000
Redemption price, percentage					103.063%
Aggregate principal amount outstanding											6,354,000
CAD 6 Percent Senior Notes Due 2020
Debt Instrument [Line Items]
Long-term debt				$ 1,000,000,000							1,000,000,000
Senior Notes 6 Percent Due 2020 [Member]
Debt Instrument [Line Items]
Redemption price, percentage				103.155%
Aggregate principal amount outstanding											$ 41,738,000
Parent
Debt Instrument [Line Items]
Number of series of subordinated notes | debt_instrument													6			6	6	6
IM US Holdings
Debt Instrument [Line Items]
Number of series of subordinated notes | debt_instrument													1			1	1	1
Canada Company
Debt Instrument [Line Items]
Number of series of subordinated notes | debt_instrument													1			1	1	1
Iron Mountain Europe
Debt Instrument [Line Items]
Number of series of subordinated notes | debt_instrument													1			1	1	1

Debt - Redemption Rates (Detail

Debt - Redemption Rates (Details)	12 Months Ended
	Dec. 31, 2018
Debt Instrument [Line Items]
Redemption price, percentage	100.00%
Senior Notes 4.375 Percent due 2021 | Redemption date 2019
Debt Instrument [Line Items]
Redemption price, percentage	101.094%
Senior Notes 4.375 Percent due 2021 | Redemption date 2020
Debt Instrument [Line Items]
Redemption price, percentage	100.00%
Senior Notes 4.375 Percent due 2021 | Redemption date 2021
Debt Instrument [Line Items]
Redemption price, percentage	100.00%
Senior Notes 6 Percent Due 2023 | Redemption date 2019
Debt Instrument [Line Items]
Redemption price, percentage	102.00%
Senior Notes 6 Percent Due 2023 | Redemption date 2020
Debt Instrument [Line Items]
Redemption price, percentage	101.00%
Senior Notes 6 Percent Due 2023 | Redemption date 2021
Debt Instrument [Line Items]
Redemption price, percentage	100.00%
Senior Notes 6 Percent Due 2023 | Redemption date 2022
Debt Instrument [Line Items]
Redemption price, percentage	100.00%
Senior Notes 6 Percent Due 2023 | Redemption date 2023
Debt Instrument [Line Items]
Redemption price, percentage	100.00%
CAD 5.375 Percent Senior Notes due 2023 | Redemption date 2019
Debt Instrument [Line Items]
Redemption price, percentage	104.031%
CAD 5.375 Percent Senior Notes due 2023 | Redemption date 2020
Debt Instrument [Line Items]
Redemption price, percentage	102.688%
CAD 5.375 Percent Senior Notes due 2023 | Redemption date 2021
Debt Instrument [Line Items]
Redemption price, percentage	101.344%
CAD 5.375 Percent Senior Notes due 2023 | Redemption date 2022
Debt Instrument [Line Items]
Redemption price, percentage	100.00%
CAD 5.375 Percent Senior Notes due 2023 | Redemption date 2023
Debt Instrument [Line Items]
Redemption price, percentage	100.00%
Senior Subordinated Notes 5.75 Percent due 2024 | Redemption date 2019
Debt Instrument [Line Items]
Redemption price, percentage	100.958%
Senior Subordinated Notes 5.75 Percent due 2024 | Redemption date 2020
Debt Instrument [Line Items]
Redemption price, percentage	100.00%
Senior Subordinated Notes 5.75 Percent due 2024 | Redemption date 2021
Debt Instrument [Line Items]
Redemption price, percentage	100.00%
Senior Subordinated Notes 5.75 Percent due 2024 | Redemption date 2022
Debt Instrument [Line Items]
Redemption price, percentage	100.00%
Senior Subordinated Notes 5.75 Percent due 2024 | Redemption date 2023
Debt Instrument [Line Items]
Redemption price, percentage	100.00%
Senior Subordinated Notes 5.75 Percent due 2024 | Redemption date 2024
Debt Instrument [Line Items]
Redemption price, percentage	100.00%
Euro Notes 3 Percent due 2025 | Redemption date 2019
Debt Instrument [Line Items]
Redemption price, percentage	0.00%
Euro Notes 3 Percent due 2025 | Redemption date 2020
Debt Instrument [Line Items]
Redemption price, percentage	101.50%
Euro Notes 3 Percent due 2025 | Redemption date 2021
Debt Instrument [Line Items]
Redemption price, percentage	100.75%
Euro Notes 3 Percent due 2025 | Redemption date 2022
Debt Instrument [Line Items]
Redemption price, percentage	100.00%
Euro Notes 3 Percent due 2025 | Redemption date 2023
Debt Instrument [Line Items]
Redemption price, percentage	100.00%
Euro Notes 3 Percent due 2025 | Redemption date 2024
Debt Instrument [Line Items]
Redemption price, percentage	100.00%
Euro Notes 3 Percent due 2025 | Redemption date 2025
Debt Instrument [Line Items]
Redemption price, percentage	100.00%
GBP Notes due 2025 3.875 Percent | Redemption date 2019
Debt Instrument [Line Items]
Redemption price, percentage	0.00%
GBP Notes due 2025 3.875 Percent | Redemption date 2020
Debt Instrument [Line Items]
Redemption price, percentage	101.938%
GBP Notes due 2025 3.875 Percent | Redemption date 2021
Debt Instrument [Line Items]
Redemption price, percentage	100.969%
GBP Notes due 2025 3.875 Percent | Redemption date 2022
Debt Instrument [Line Items]
Redemption price, percentage	100.00%
GBP Notes due 2025 3.875 Percent | Redemption date 2023
Debt Instrument [Line Items]
Redemption price, percentage	100.00%
GBP Notes due 2025 3.875 Percent | Redemption date 2024
Debt Instrument [Line Items]
Redemption price, percentage	100.00%
GBP Notes due 2025 3.875 Percent | Redemption date 2025
Debt Instrument [Line Items]
Redemption price, percentage	100.00%
Senior Notes 5.375 Percent due 2026 | Redemption date 2019
Debt Instrument [Line Items]
Redemption price, percentage	0.00%
Senior Notes 5.375 Percent due 2026 | Redemption date 2020
Debt Instrument [Line Items]
Redemption price, percentage	0.00%
Senior Notes 5.375 Percent due 2026 | Redemption date 2021
Debt Instrument [Line Items]
Redemption price, percentage	102.688%
Senior Notes 5.375 Percent due 2026 | Redemption date 2022
Debt Instrument [Line Items]
Redemption price, percentage	101.792%
Senior Notes 5.375 Percent due 2026 | Redemption date 2023
Debt Instrument [Line Items]
Redemption price, percentage	100.896%
Senior Notes 5.375 Percent due 2026 | Redemption date 2024
Debt Instrument [Line Items]
Redemption price, percentage	100.00%
Senior Notes 5.375 Percent due 2026 | Redemption date 2025
Debt Instrument [Line Items]
Redemption price, percentage	100.00%
Senior Notes 5.375 Percent due 2026 | Redemption date 2026
Debt Instrument [Line Items]
Redemption price, percentage	100.00%
Senior Notes 4.875 Percent due 2027 | Redemption date 2019
Debt Instrument [Line Items]
Redemption price, percentage	0.00%
Senior Notes 4.875 Percent due 2027 | Redemption date 2020
Debt Instrument [Line Items]
Redemption price, percentage	0.00%
Senior Notes 4.875 Percent due 2027 | Redemption date 2021
Debt Instrument [Line Items]
Redemption price, percentage	0.00%
Senior Notes 4.875 Percent due 2027 | Redemption date 2022
Debt Instrument [Line Items]
Redemption price, percentage	102.438%
Senior Notes 4.875 Percent due 2027 | Redemption date 2023
Debt Instrument [Line Items]
Redemption price, percentage	101.625%
Senior Notes 4.875 Percent due 2027 | Redemption date 2024
Debt Instrument [Line Items]
Redemption price, percentage	100.813%
Senior Notes 4.875 Percent due 2027 | Redemption date 2025
Debt Instrument [Line Items]
Redemption price, percentage	100.00%
Senior Notes 4.875 Percent due 2027 | Redemption date 2026
Debt Instrument [Line Items]
Redemption price, percentage	100.00%
Senior Notes 4.875 Percent due 2027 | Redemption date 2027
Debt Instrument [Line Items]
Redemption price, percentage	100.00%
Senior Notes due 2028 5.25 Percent | Redemption date 2019
Debt Instrument [Line Items]
Redemption price, percentage	0.00%
Senior Notes due 2028 5.25 Percent | Redemption date 2020
Debt Instrument [Line Items]
Redemption price, percentage	0.00%
Senior Notes due 2028 5.25 Percent | Redemption date 2021
Debt Instrument [Line Items]
Redemption price, percentage	0.00%
Senior Notes due 2028 5.25 Percent | Redemption date 2022
Debt Instrument [Line Items]
Redemption price, percentage	102.625%
Senior Notes due 2028 5.25 Percent | Redemption date 2023
Debt Instrument [Line Items]
Redemption price, percentage	101.75%
Senior Notes due 2028 5.25 Percent | Redemption date 2024
Debt Instrument [Line Items]
Redemption price, percentage	100.875%
Senior Notes due 2028 5.25 Percent | Redemption date 2025
Debt Instrument [Line Items]
Redemption price, percentage	100.00%
Senior Notes due 2028 5.25 Percent | Redemption date 2026
Debt Instrument [Line Items]
Redemption price, percentage	100.00%
Senior Notes due 2028 5.25 Percent | Redemption date 2027
Debt Instrument [Line Items]
Redemption price, percentage	100.00%
Senior Notes due 2028 5.25 Percent | Redemption date 2028
Debt Instrument [Line Items]
Redemption price, percentage	100.00%

Debt - Australian Dollar Term L

Debt - Australian Dollar Term Loan (Details) $ in Thousands, $ in Thousands	Mar. 29, 2018USD ($)	Mar. 29, 2018AUD ($)	Mar. 27, 2018AUD ($)	Sep. 28, 2016AUD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2018AUD ($)	Dec. 31, 2017AUD ($)
Debt Instrument [Line Items]
Debt (inclusive of discount)					$ 8,229,430	$ 7,129,511
Net proceeds from sales of senior notes					0	2,656,948	$ 925,443
Australian Dollar Term Loan
Debt Instrument [Line Items]
Debt (inclusive of discount)			$ 350,000	$ 250,000	233,955	187,504
Amount of quarterly installments based on the original principal			$ 8,750	$ 6,250
Par			99.00%
Net proceeds from sales of senior notes	$ 75,621	$ 99,000
Fair Value					$ 235,645	$ 189,049		$ 334,063	$ 242,188
Effective interest rate (as a percent)					6.00%	6.10%		6.00%	6.10%
Australian Dollar Term Loan | BBSY
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate			3.875%	4.30%

Debt - UK Bilateral Revolving C

Debt - UK Bilateral Revolving Credit Facility (Details) - Revolving Credit Facility - UK Bilateral Revolving Credit Facility $ in Thousands	Sep. 24, 2018USD ($)	Sep. 24, 2018GBP (£)	Dec. 31, 2018
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%	2.25%
Effective interest rate (as a percent)			3.10%
Proceeds from lines of credit	$ 180,300	£ 138,250,000

Debt - Accounts Receivable and

Debt - Accounts Receivable and Mortgage Securitization Program Narrative (Details) - Secured Debt - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Jul. 31, 2017	Oct. 31, 2016	Mar. 31, 2015
Accounts Receivable Securitization Program
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 275,000,000		$ 250,000,000
Line of credit	$ 221,673,000	$ 258,973,000
Effective interest rate (as a percent)	3.00%	2.20%
Commitment fee percentage	0.40%
Mortgage Securitization Program
Debt Instrument [Line Items]
Maximum borrowing capacity				$ 50,000,000
Line of credit	$ 50,000,000	$ 50,000,000
Effective interest rate (as a percent)	3.50%	3.50%

Debt - Cash Pooling (Details)

Debt - Cash Pooling (Details) $ in Thousands	3 Months Ended
	Jun. 30, 2017USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Debt Instrument [Line Items]
Number of cash pools		2
QRS Cash Pool
Debt Instrument [Line Items]
Cash pool agreement, borrowings, maximum	$ 10,000
Cash pool agreement, cash position, net		$ 2,000	$ 5,700
Cash pool agreement, cash position, gross		300,800	383,700
Cash pool agreement, outstanding borrowings		298,800	378,000
TRS Cash Pool
Debt Instrument [Line Items]
Cash pool agreement, cash position, net		2,200	0
Cash pool agreement, cash position, gross		281,500	229,600
Cash pool agreement, outstanding borrowings		$ 279,300	$ 229,600

Debt - Covenant Ratios (Details

Debt - Covenant Ratios (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)	Dec. 31, 2018
Senior And Senior Subordinated Notes [Member]
Debt Instrument [Line Items]
Maximum allowable leverage ratio under indentures pertaining to senior and senior subordinated notes		6.5
Credit Agreement
Debt Instrument [Line Items]
Net total lease adjusted leverage ratio	5	5.6
Net secured debt lease adjusted leverage ratio	1.6	2.6
Bond leverage ratio (not lease adjusted)	5.8	5.8
Fixed charge coverage ratio	2.1	2.2
Credit Agreement | Maximum
Debt Instrument [Line Items]
Net total lease adjusted leverage ratio	6.5	6.5
Net secured debt lease adjusted leverage ratio	4	4
Credit Agreement | Minimum
Debt Instrument [Line Items]
Fixed charge coverage ratio	1.5	1.5
Senior Notes 4.875% due 2027, GBP Notes due 2025 and Senior Notes 5.25% Notes
Debt Instrument [Line Items]
Maximum allowable leverage ratio under indentures pertaining to senior and senior subordinated notes		7
Revolving Credit Facility
Debt Instrument [Line Items]
Repayment of debt	$ 807,000

Debt - Maturities of Long Term

Debt - Maturities of Long Term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Debt Disclosure [Abstract]
2,019	$ 126,406
2,020	381,741
2,021	583,759
2,022	447,153
2,023	1,800,128
Thereafter	4,893,514
Long-term Debt, Excluding Unamortized (Discount) Premium and Debt Issuance Costs, and Current Maturities	8,232,701
Net Discounts	(3,271)
Net Deferred Financing Costs	(86,607)	$ (86,240)
Total Long-term Debt (including current portion)	$ 8,142,823	$ 7,043,271

Selected Consolidated Financi_3

Selected Consolidated Financial Statements of Parent, Guarantors, Canada Company and Non-Guarantors - Additional Information (Details)	Dec. 31, 2018
Selected Consolidated Financial Statements of Parent, Guarantors, Canada Company and Non-Guarantors [Abstract]
Ownership percentage of subsidiaries	100.00%

Selected Consolidated Financi_4

Selected Consolidated Financial Statements of Parent, Guarantors, Canada Company and Non-Guarantors - Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current Assets:
Cash and cash equivalents	$ 165,485	$ 925,699	$ 236,484	$ 128,381
Accounts receivable	846,889	835,742
Intercompany receivable	0	0
Prepaid expenses and other	195,740	188,874
Total Current Assets	1,208,114	1,950,315
Property, Plant and Equipment, Net	4,489,557	3,417,679
Other Assets, Net:
Long-term notes receivable from affiliates and intercompany receivable	0	0
Investment in subsidiaries	0	0
Goodwill	4,441,030	4,070,267
Other	1,713,546	1,534,141
Total Other Assets, net	6,154,576	5,604,408
Total Assets	11,852,247	10,972,402	9,486,800
Liabilities and Equity
Intercompany Payable	0	0
Debit Balances Under Cash Pool	0	0
Current Portion of Long-term Debt	126,406	146,300
Total Other Current Liabilities	1,336,272	1,183,873
Long-term Debt, Net of Current Portion	8,016,417	6,896,971
Long-term Notes Payable to Affiliates and Intercompany Payable	0	0
Other Long-term Liabilities	417,031	354,998
Commitments and Contingencies (see Note 10)
Redeemable Noncontrolling Interests (see Note 2.v.)	70,532	91,418
Total Iron Mountain Incorporated Stockholders' Equity	1,884,180	2,297,438
Noncontrolling Interests	1,409	1,404
Total Equity	1,885,589	2,298,842	$ 1,936,671	$ 528,607
Total Liabilities and Equity	11,852,247	10,972,402
Reportable legal entities
Liabilities and Equity
Commitments and Contingencies (see Note 10)
Eliminations
Current Assets:
Cash and cash equivalents	(65,615)	(94,726)
Accounts receivable	0	0
Intercompany receivable	(818,463)	(482,024)
Prepaid expenses and other	(29)	(29)
Total Current Assets	(884,107)	(576,779)
Property, Plant and Equipment, Net	0	0
Other Assets, Net:
Long-term notes receivable from affiliates and intercompany receivable	(4,954,686)	(4,578,995)
Investment in subsidiaries	(2,891,318)	(2,744,044)
Goodwill	0	0
Other	0	0
Total Other Assets, net	(7,846,004)	(7,323,039)
Total Assets	(8,730,111)	(7,899,818)
Liabilities and Equity
Intercompany Payable	(818,463)	(482,024)
Debit Balances Under Cash Pool	(65,615)	(94,726)
Current Portion of Long-term Debt	(29)	(29)
Total Other Current Liabilities	0	0
Long-term Debt, Net of Current Portion	0	0
Long-term Notes Payable to Affiliates and Intercompany Payable	(4,954,686)	(4,578,995)
Other Long-term Liabilities	0	0
Commitments and Contingencies (see Note 10)
Redeemable Noncontrolling Interests (see Note 2.v.)	0	0
Total Iron Mountain Incorporated Stockholders' Equity	(2,891,318)	(2,744,044)
Noncontrolling Interests	0	0
Total Equity	(2,891,318)	(2,744,044)
Total Liabilities and Equity	(8,730,111)	(7,899,818)
Parent | Reportable legal entities
Current Assets:
Cash and cash equivalents	132	2,433
Accounts receivable	0	0
Intercompany receivable	0	332,293
Prepaid expenses and other	93	1,579
Total Current Assets	225	336,305
Property, Plant and Equipment, Net	190	316
Other Assets, Net:
Long-term notes receivable from affiliates and intercompany receivable	4,954,686	4,578,995
Investment in subsidiaries	1,885,174	1,858,045
Goodwill	0	0
Other	0	0
Total Other Assets, net	6,839,860	6,437,040
Total Assets	6,840,275	6,773,661
Liabilities and Equity
Intercompany Payable	462,927	0
Debit Balances Under Cash Pool	0	0
Current Portion of Long-term Debt	0	0
Total Other Current Liabilities	268,373	235,062
Long-term Debt, Net of Current Portion	4,223,822	4,232,759
Long-term Notes Payable to Affiliates and Intercompany Payable	0	0
Other Long-term Liabilities	973	0
Commitments and Contingencies (see Note 10)
Redeemable Noncontrolling Interests (see Note 2.v.)	0	8,402
Total Iron Mountain Incorporated Stockholders' Equity	1,884,180	2,297,438
Noncontrolling Interests	0	0
Total Equity	1,884,180	2,297,438
Total Liabilities and Equity	6,840,275	6,773,661
Guarantors
Liabilities and Equity
Deposits	57,200	38,400
Guarantors | Reportable legal entities
Current Assets:
Cash and cash equivalents	61,650	634,317
Accounts receivable	47,900	32,972
Intercompany receivable	818,463	149,731
Prepaid expenses and other	108,879	103,643
Total Current Assets	1,036,892	920,663
Property, Plant and Equipment, Net	3,002,104	2,030,875
Other Assets, Net:
Long-term notes receivable from affiliates and intercompany receivable	0	0
Investment in subsidiaries	1,006,144	885,999
Goodwill	2,858,539	2,577,310
Other	979,483	796,913
Total Other Assets, net	4,844,166	4,260,222
Total Assets	8,883,162	7,211,760
Liabilities and Equity
Intercompany Payable	0	0
Debit Balances Under Cash Pool	10,612	56,233
Current Portion of Long-term Debt	63,703	54,247
Total Other Current Liabilities	616,826	527,549
Long-term Debt, Net of Current Portion	1,877,649	758,166
Long-term Notes Payable to Affiliates and Intercompany Payable	4,954,686	4,578,995
Other Long-term Liabilities	115,994	113,024
Commitments and Contingencies (see Note 10)
Redeemable Noncontrolling Interests (see Note 2.v.)	0	0
Total Iron Mountain Incorporated Stockholders' Equity	1,243,692	1,123,546
Noncontrolling Interests	0	0
Total Equity	1,243,692	1,123,546
Total Liabilities and Equity	8,883,162	7,211,760
Non-Guarantor Subsidiaries
Liabilities and Equity
Deposits	12,700	62,000
Non-Guarantor Subsidiaries | Reportable legal entities
Current Assets:
Cash and cash equivalents	169,318	383,675
Accounts receivable	798,989	802,770
Intercompany receivable	0	0
Prepaid expenses and other	86,797	83,681
Total Current Assets	1,055,104	1,270,126
Property, Plant and Equipment, Net	1,487,263	1,386,488
Other Assets, Net:
Long-term notes receivable from affiliates and intercompany receivable	0	0
Investment in subsidiaries	0	0
Goodwill	1,582,491	1,492,957
Other	734,063	737,228
Total Other Assets, net	2,316,554	2,230,185
Total Assets	4,858,921	4,886,799
Liabilities and Equity
Intercompany Payable	355,536	482,024
Debit Balances Under Cash Pool	55,003	38,493
Current Portion of Long-term Debt	62,732	92,082
Total Other Current Liabilities	451,073	421,262
Long-term Debt, Net of Current Portion	1,914,946	1,906,046
Long-term Notes Payable to Affiliates and Intercompany Payable	0	0
Other Long-term Liabilities	300,064	241,974
Commitments and Contingencies (see Note 10)
Redeemable Noncontrolling Interests (see Note 2.v.)	70,532	83,016
Total Iron Mountain Incorporated Stockholders' Equity	1,647,626	1,620,498
Noncontrolling Interests	1,409	1,404
Total Equity	1,649,035	1,621,902
Total Liabilities and Equity	$ 4,858,921	$ 4,886,799

Selected Consolidated Financi_5

Selected Consolidated Financial Statements of Parent, Guarantors, Canada Company and Non-Guarantors - Consolidated Statement of Operations (Details) - USD ($)	Oct. 01, 2018	Oct. 01, 2016	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues:
Intercompany revenues											$ 0	$ 0	$ 0
Revenues			$ 1,061,489,000	$ 1,060,991,000	$ 1,060,823,000	$ 1,042,458,000	$ 991,235,000	$ 965,661,000	$ 949,806,000	$ 938,876,000	4,225,761,000	3,845,578,000	3,511,453,000
Operating Expenses:
Cost of sales (excluding depreciation and amortization)											1,801,582,000	1,685,318,000	1,567,777,000
Intercompany cost of sales											0	0	0
Selling, general and administrative											1,038,975,000	984,965,000	988,332,000
Depreciation and amortization											639,514,000	522,376,000	452,326,000
Intangible impairments	$ 0	$ 0					3,011,000				0	3,011,000	0
Loss (Gain) on disposal/write-down of property, plant and equipment (excluding real estate), net											(9,818,000)	799,000	1,412,000
Total Operating Expenses											3,470,253,000	3,196,469,000	3,009,847,000
Operating (Loss) Income			191,844,000	195,746,000	203,359,000	164,559,000	154,405,000	176,756,000	170,194,000	147,755,000	755,508,000	649,109,000	501,606,000
Interest Expense (Income), Net											409,289,000	353,575,000	310,662,000
Other Expense (Income), Net											(11,692,000)	79,429,000	44,300,000
Income (Loss) from Continuing Operations Before Provision (Benefit) for Income Taxes and Gain on Sale of Real Estate											357,911,000	216,105,000	146,644,000
Provision (Benefit) for Income Taxes											36,263,000	25,947,000	44,944,000
Gain on Sale of Real Estate, Net of Tax											(55,328,000)	(1,565,000)	(2,180,000)
Equity in the (Earnings) Losses of Subsidiaries, Net of Tax											0	0	0
Income (Loss) from Continuing Operations			158,831,000	78,628,000	93,903,000	45,614,000	24,349,000	25,382,000	83,148,000	58,844,000	376,976,000	191,723,000	103,880,000
Income (Loss) from Discontinued Operations, Net of Tax			0	(11,605,000)	(360,000)	(462,000)	(2,870,000)	(1,058,000)	(2,026,000)	(337,000)	(12,427,000)	(6,291,000)	3,353,000
Net Income (Loss)			158,831,000	67,023,000	93,543,000	45,152,000	21,479,000	24,324,000	81,122,000	58,507,000	364,549,000	185,432,000	107,233,000
Less: Net Income (Loss) Attributable to Noncontrolling Interests											1,198,000	1,611,000	2,409,000
Net Income (Loss) Attributable to Iron Mountain Incorporated			158,118,000	67,148,000	93,401,000	44,684,000	22,721,000	24,345,000	78,630,000	58,125,000	363,351,000	183,821,000	104,824,000
Net Income (Loss)			$ 158,831,000	$ 67,023,000	$ 93,543,000	$ 45,152,000	$ 21,479,000	$ 24,324,000	$ 81,122,000	$ 58,507,000	364,549,000	185,432,000	107,233,000
Other Comprehensive Income (Loss):
Foreign Currency Translation Adjustment											(164,107,000)	108,564,000	(35,641,000)
Market Value Adjustments for Securities											0	0	(734,000)
Change in Fair Value of Interest Rate Swap Agreements											(973,000)	0	0
Equity in Other Comprehensive (Loss) Income of Subsidiaries											0	0	0
Total Other Comprehensive (Loss) Income											(165,080,000)	108,564,000	(36,375,000)
Comprehensive Income (Loss)											199,469,000	293,996,000	70,858,000
Comprehensive Income (Loss) Attributable to Noncontrolling Interests											(2,207,000)	1,591,000	3,690,000
Comprehensive Income (Loss) Attributable to Iron Mountain Incorporated											201,676,000	292,405,000	67,168,000
Eliminations
Revenues:
Intercompany revenues											(23,198,000)	(29,190,000)	(84,782,000)
Revenues											(23,198,000)	(29,190,000)	(84,782,000)
Operating Expenses:
Cost of sales (excluding depreciation and amortization)											0	0	0
Intercompany cost of sales											(23,198,000)	(29,190,000)	(84,782,000)
Selling, general and administrative											0	0	0
Depreciation and amortization											0	0	0
Intangible impairments												0
Loss (Gain) on disposal/write-down of property, plant and equipment (excluding real estate), net											0	0	0
Total Operating Expenses											(23,198,000)	(29,190,000)	(84,782,000)
Operating (Loss) Income											0	0	0
Interest Expense (Income), Net											0	0	0
Other Expense (Income), Net											0	0	0
Income (Loss) from Continuing Operations Before Provision (Benefit) for Income Taxes and Gain on Sale of Real Estate											0	0	0
Provision (Benefit) for Income Taxes											0	0	0
Gain on Sale of Real Estate, Net of Tax											0	0	0
Equity in the (Earnings) Losses of Subsidiaries, Net of Tax											722,461,000	420,251,000	322,199,000
Income (Loss) from Continuing Operations											(722,461,000)	(420,251,000)	(322,199,000)
Income (Loss) from Discontinued Operations, Net of Tax											0	0	0
Net Income (Loss)											(722,461,000)	(420,251,000)	(322,199,000)
Less: Net Income (Loss) Attributable to Noncontrolling Interests											0	0	0
Net Income (Loss) Attributable to Iron Mountain Incorporated											(722,461,000)	(420,251,000)	(322,199,000)
Net Income (Loss)											(722,461,000)	(420,251,000)	(322,199,000)
Other Comprehensive Income (Loss):
Foreign Currency Translation Adjustment											0	0	0
Market Value Adjustments for Securities													0
Change in Fair Value of Interest Rate Swap Agreements											0
Equity in Other Comprehensive (Loss) Income of Subsidiaries											311,743,000	(205,726,000)	48,729,000
Total Other Comprehensive (Loss) Income											311,743,000	(205,726,000)	48,729,000
Comprehensive Income (Loss)											(410,718,000)	(625,977,000)	(273,470,000)
Comprehensive Income (Loss) Attributable to Noncontrolling Interests											0	0	0
Comprehensive Income (Loss) Attributable to Iron Mountain Incorporated											(410,718,000)	(625,977,000)	(273,470,000)
Parent | Reportable legal entities
Revenues:
Intercompany revenues											0	0	0
Revenues											0	0	0
Operating Expenses:
Cost of sales (excluding depreciation and amortization)											0	0	0
Intercompany cost of sales											0	0	0
Selling, general and administrative											(288,000)	161,000	668,000
Depreciation and amortization											122,000	167,000	179,000
Intangible impairments												0
Loss (Gain) on disposal/write-down of property, plant and equipment (excluding real estate), net											0	0	0
Total Operating Expenses											(166,000)	328,000	847,000
Operating (Loss) Income											166,000	(328,000)	(847,000)
Interest Expense (Income), Net											199,955,000	163,541,000	110,659,000
Other Expense (Income), Net											2,328,000	47,176,000	71,335,000
Income (Loss) from Continuing Operations Before Provision (Benefit) for Income Taxes and Gain on Sale of Real Estate											(202,117,000)	(211,045,000)	(182,841,000)
Provision (Benefit) for Income Taxes											0	0	0
Gain on Sale of Real Estate, Net of Tax											0	0	0
Equity in the (Earnings) Losses of Subsidiaries, Net of Tax											(565,468,000)	(394,866,000)	(287,665,000)
Income (Loss) from Continuing Operations											363,351,000	183,821,000	104,824,000
Income (Loss) from Discontinued Operations, Net of Tax											0	0	0
Net Income (Loss)											363,351,000	183,821,000	104,824,000
Less: Net Income (Loss) Attributable to Noncontrolling Interests											0	0	0
Net Income (Loss) Attributable to Iron Mountain Incorporated											363,351,000	183,821,000	104,824,000
Net Income (Loss)											363,351,000	183,821,000	104,824,000
Other Comprehensive Income (Loss):
Foreign Currency Translation Adjustment											11,070,000	(15,015,000)	1,107,000
Market Value Adjustments for Securities													0
Change in Fair Value of Interest Rate Swap Agreements											(973,000)
Equity in Other Comprehensive (Loss) Income of Subsidiaries											(171,772,000)	123,599,000	(38,763,000)
Total Other Comprehensive (Loss) Income											(161,675,000)	108,584,000	(37,656,000)
Comprehensive Income (Loss)											201,676,000	292,405,000	67,168,000
Comprehensive Income (Loss) Attributable to Noncontrolling Interests											0	0	0
Comprehensive Income (Loss) Attributable to Iron Mountain Incorporated											201,676,000	292,405,000	67,168,000
Guarantors | Reportable legal entities
Revenues:
Intercompany revenues											4,759,000	4,577,000	3,994,000
Revenues											2,575,667,000	2,305,666,000	2,168,349,000
Operating Expenses:
Cost of sales (excluding depreciation and amortization)											1,007,794,000	925,385,000	895,595,000
Intercompany cost of sales											18,439,000	24,613,000	17,496,000
Selling, general and administrative											711,702,000	654,213,000	668,975,000
Depreciation and amortization											403,480,000	309,883,000	272,831,000
Intangible impairments												3,011,000
Loss (Gain) on disposal/write-down of property, plant and equipment (excluding real estate), net											(1,489,000)	(999,000)	1,328,000
Total Operating Expenses											2,139,926,000	1,916,106,000	1,856,225,000
Operating (Loss) Income											435,741,000	389,560,000	312,124,000
Interest Expense (Income), Net											5,692,000	6,996,000	(7,741,000)
Other Expense (Income), Net											16,744,000	9,112,000	(13,247,000)
Income (Loss) from Continuing Operations Before Provision (Benefit) for Income Taxes and Gain on Sale of Real Estate											413,305,000	373,452,000	333,112,000
Provision (Benefit) for Income Taxes											(2,418,000)	5,854,000	30,860,000
Gain on Sale of Real Estate, Net of Tax											(836,000)	0	(2,121,000)
Equity in the (Earnings) Losses of Subsidiaries, Net of Tax											(156,993,000)	(25,385,000)	(22,662,000)
Income (Loss) from Continuing Operations											573,552,000	392,983,000	327,035,000
Income (Loss) from Discontinued Operations, Net of Tax											(12,283,000)	(4,370,000)	1,642,000
Net Income (Loss)											561,269,000	388,613,000	328,677,000
Less: Net Income (Loss) Attributable to Noncontrolling Interests											0	0	0
Net Income (Loss) Attributable to Iron Mountain Incorporated											561,269,000	388,613,000	328,677,000
Net Income (Loss)											561,269,000	388,613,000	328,677,000
Other Comprehensive Income (Loss):
Foreign Currency Translation Adjustment											0	0	0
Market Value Adjustments for Securities													(734,000)
Change in Fair Value of Interest Rate Swap Agreements											0
Equity in Other Comprehensive (Loss) Income of Subsidiaries											(139,971,000)	82,127,000	(3,164,000)
Total Other Comprehensive (Loss) Income											(139,971,000)	82,127,000	(3,898,000)
Comprehensive Income (Loss)											421,298,000	470,740,000	324,779,000
Comprehensive Income (Loss) Attributable to Noncontrolling Interests											0	0	0
Comprehensive Income (Loss) Attributable to Iron Mountain Incorporated											421,298,000	470,740,000	324,779,000
Non-Guarantor Subsidiaries | Reportable legal entities
Revenues:
Intercompany revenues											18,439,000	24,613,000	80,788,000
Revenues											1,673,292,000	1,569,102,000	1,238,404,000
Operating Expenses:
Cost of sales (excluding depreciation and amortization)											793,788,000	759,933,000	642,764,000
Intercompany cost of sales											4,759,000	4,577,000	3,994,000
Selling, general and administrative											327,561,000	330,591,000	300,903,000
Depreciation and amortization											235,912,000	212,326,000	163,836,000
Intangible impairments												0
Loss (Gain) on disposal/write-down of property, plant and equipment (excluding real estate), net											(8,329,000)	1,798,000	(226,000)
Total Operating Expenses											1,353,691,000	1,309,225,000	1,111,271,000
Operating (Loss) Income											319,601,000	259,877,000	127,133,000
Interest Expense (Income), Net											203,642,000	183,038,000	167,198,000
Other Expense (Income), Net											(30,764,000)	23,141,000	(24,129,000)
Income (Loss) from Continuing Operations Before Provision (Benefit) for Income Taxes and Gain on Sale of Real Estate											146,723,000	53,698,000	(15,936,000)
Provision (Benefit) for Income Taxes											38,681,000	20,093,000	6,730,000
Gain on Sale of Real Estate, Net of Tax											(54,492,000)	(1,565,000)	0
Equity in the (Earnings) Losses of Subsidiaries, Net of Tax											0	0	(6,832,000)
Income (Loss) from Continuing Operations											162,534,000	35,170,000	(15,834,000)
Income (Loss) from Discontinued Operations, Net of Tax											(144,000)	(1,921,000)	(107,000)
Net Income (Loss)											162,390,000	33,249,000	(15,941,000)
Less: Net Income (Loss) Attributable to Noncontrolling Interests											1,198,000	1,611,000	2,409,000
Net Income (Loss) Attributable to Iron Mountain Incorporated											161,192,000	31,638,000	(18,350,000)
Net Income (Loss)											162,390,000	33,249,000	(15,941,000)
Other Comprehensive Income (Loss):
Foreign Currency Translation Adjustment											(175,177,000)	123,579,000	(30,625,000)
Market Value Adjustments for Securities													0
Change in Fair Value of Interest Rate Swap Agreements											0
Equity in Other Comprehensive (Loss) Income of Subsidiaries											0	0	(6,123,000)
Total Other Comprehensive (Loss) Income											(175,177,000)	123,579,000	(36,748,000)
Comprehensive Income (Loss)											(12,787,000)	156,828,000	(52,689,000)
Comprehensive Income (Loss) Attributable to Noncontrolling Interests											(2,207,000)	1,591,000	3,690,000
Comprehensive Income (Loss) Attributable to Iron Mountain Incorporated											(10,580,000)	155,237,000	(56,379,000)
Canada Company | Reportable legal entities
Revenues:
Intercompany revenues													0
Revenues													189,482,000
Operating Expenses:
Cost of sales (excluding depreciation and amortization)													29,418,000
Intercompany cost of sales													63,292,000
Selling, general and administrative													17,786,000
Depreciation and amortization													15,480,000
Loss (Gain) on disposal/write-down of property, plant and equipment (excluding real estate), net													310,000
Total Operating Expenses													126,286,000
Operating (Loss) Income													63,196,000
Interest Expense (Income), Net													40,546,000
Other Expense (Income), Net													10,341,000
Income (Loss) from Continuing Operations Before Provision (Benefit) for Income Taxes and Gain on Sale of Real Estate													12,309,000
Provision (Benefit) for Income Taxes													7,354,000
Gain on Sale of Real Estate, Net of Tax													(59,000)
Equity in the (Earnings) Losses of Subsidiaries, Net of Tax													(5,040,000)
Income (Loss) from Continuing Operations													10,054,000
Income (Loss) from Discontinued Operations, Net of Tax													1,818,000
Net Income (Loss)													11,872,000
Less: Net Income (Loss) Attributable to Noncontrolling Interests													0
Net Income (Loss) Attributable to Iron Mountain Incorporated													11,872,000
Net Income (Loss)													11,872,000
Other Comprehensive Income (Loss):
Foreign Currency Translation Adjustment													(6,123,000)
Market Value Adjustments for Securities													0
Equity in Other Comprehensive (Loss) Income of Subsidiaries													(679,000)
Total Other Comprehensive (Loss) Income													(6,802,000)
Comprehensive Income (Loss)													5,070,000
Comprehensive Income (Loss) Attributable to Noncontrolling Interests													0
Comprehensive Income (Loss) Attributable to Iron Mountain Incorporated													5,070,000
Storage rental
Revenues:
Revenues											2,622,455,000	2,377,557,000	2,142,905,000
Storage rental | Eliminations
Revenues:
Revenues											0	0	0
Storage rental | Parent | Reportable legal entities
Revenues:
Revenues											0	0	0
Storage rental | Guarantors | Reportable legal entities
Revenues:
Revenues											1,600,230,000	1,437,466,000	1,341,840,000
Storage rental | Non-Guarantor Subsidiaries | Reportable legal entities
Revenues:
Revenues											1,022,225,000	940,091,000	675,730,000
Storage rental | Canada Company | Reportable legal entities
Revenues:
Revenues													125,335,000
Service
Revenues:
Revenues											1,603,306,000	1,468,021,000	1,368,548,000
Service | Eliminations
Revenues:
Revenues											0	0	0
Service | Parent | Reportable legal entities
Revenues:
Revenues											0	0	0
Service | Guarantors | Reportable legal entities
Revenues:
Revenues											970,678,000	863,623,000	822,515,000
Service | Non-Guarantor Subsidiaries | Reportable legal entities
Revenues:
Revenues											$ 632,628,000	$ 604,398,000	481,886,000
Service | Canada Company | Reportable legal entities
Revenues:
Revenues													$ 64,147,000

Selected Consolidated Financi_6

Selected Consolidated Financial Statements of Parent, Guarantors, Canada Company and Non-Guarantors - Consolidated Statement of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash Flows from Operating Activities:
Cash Flows from Operating Activities	$ 936,544	$ 724,259	$ 541,216
Cash Flows from Operating Activities-Discontinued Operations	(995)	(3,291)	2,679
Cash Flows from Operating Activities	935,549	720,968	543,895
Cash Flows from Investing Activities:
Capital expenditures	(460,062)	(343,131)	(328,603)
Cash paid for acquisitions, net of cash acquired	(1,758,557)	(219,705)	(291,965)
Intercompany loans to subsidiaries	0	0	0
Investment in subsidiaries		0	0
Acquisitions of customer relationships and customer inducements	(98,687)	(75,185)	(50,766)
Net proceeds from divestments (see Note 13)	1,019	29,236	30,654
Proceeds from sales of property and equipment and other, net (including real estate) and proceeds from involuntary conversion of property and equipment	86,159	9,337	7,977
Cash Flows from Investing Activities-Continuing Operations	(2,230,128)	(599,448)	(632,703)
Cash Flows from Investing Activities-Discontinued Operations	8,250	0	96,712
Cash Flows from Investing Activities	(2,221,878)	(599,448)	(535,991)
Cash Flows from Financing Activities:
Repayment of revolving credit and term loan facilities, bridge facilities and other debt	(14,192,139)	(14,429,695)	(14,851,440)
Proceeds from revolving credit and term loan facilities, bridge facilities and other debt	15,351,614	13,917,055	14,544,388
Early retirement of senior subordinated notes	0	(1,746,856)	0
Net proceeds from sales of senior notes	0	2,656,948	925,443
Debit (payments) balances under cash pools	0	0
Debt (repayment to) financing from and equity (distribution to) contribution from noncontrolling interests, net	(2,523)	9,079	(466)
Intercompany loans from parent	0	0	0
Equity contribution from parent		0	0
Parent cash dividends	(673,635)	(439,999)	(505,871)
Net proceeds associated with the Equity Offering, including Over-Allotment Option	76,192	516,462	0
Net proceeds associated with the At The Market (ATM) Program	8,716
Net proceeds (payments) associated with employee stock-based awards	(1,142)	13,095	31,922
Net proceeds associated with the Equity Offering, including Over-Allotment Option		516,462
Excess tax benefit from employee stock-based awards	8,716	59,129	0
Payment of debt financing and stock issuance costs	(16,405)	(14,793)	(18,603)
Cash Flows from Financing Activities	550,678	540,425	125,373
Cash Flows from Financing Activities-Continuing Operations	550,678	540,425	125,373
Cash Flows from Financing Activities-Discontinued Operations	0	0	0
Effect of exchange rates on cash and cash equivalents	(24,563)	27,270	(25,174)
Increase (Decrease) in cash and cash equivalents	(760,214)	689,215	108,103
Cash and cash equivalents, including Restricted Cash, beginning of year	925,699	236,484	128,381
Cash and cash equivalents, including Restricted Cash, end of year	165,485	925,699	236,484
Eliminations
Cash Flows from Operating Activities:
Cash Flows from Operating Activities	0	0	0
Cash Flows from Operating Activities-Discontinued Operations	0	0	0
Cash Flows from Operating Activities	0	0	0
Cash Flows from Investing Activities:
Capital expenditures	0	0	0
Cash paid for acquisitions, net of cash acquired	0	0	0
Intercompany loans to subsidiaries	(896,368)	1,335,554	11,493
Investment in subsidiaries		16,170	3,170
Acquisitions of customer relationships and customer inducements	0	0	0
Net proceeds from divestments (see Note 13)	0	0	0
Proceeds from sales of property and equipment and other, net (including real estate) and proceeds from involuntary conversion of property and equipment	0	0	0
Cash Flows from Investing Activities-Continuing Operations	(896,368)	1,351,724	14,663
Cash Flows from Investing Activities-Discontinued Operations	0	0	0
Cash Flows from Investing Activities	(896,368)	1,351,724	14,663
Cash Flows from Financing Activities:
Repayment of revolving credit and term loan facilities, bridge facilities and other debt	0	0	0
Proceeds from revolving credit and term loan facilities, bridge facilities and other debt	0	0	0
Early retirement of senior subordinated notes		0
Net proceeds from sales of senior notes		0	0
Debit (payments) balances under cash pools	29,111	(94,726)
Debt (repayment to) financing from and equity (distribution to) contribution from noncontrolling interests, net	0	0	0
Intercompany loans from parent	896,368	(1,335,554)	(11,493)
Equity contribution from parent		(16,170)	(3,170)
Parent cash dividends	0	0	0
Net proceeds associated with the Equity Offering, including Over-Allotment Option	0
Net proceeds associated with the At The Market (ATM) Program	0
Net proceeds (payments) associated with employee stock-based awards	0	0	0
Net proceeds associated with the Equity Offering, including Over-Allotment Option		0
Excess tax benefit from employee stock-based awards		0
Payment of debt financing and stock issuance costs	0	0	0
Cash Flows from Financing Activities	925,479	(1,446,450)	(14,663)
Cash Flows from Financing Activities-Continuing Operations	925,479	(1,446,450)	(14,663)
Cash Flows from Financing Activities-Discontinued Operations	0	0	0
Effect of exchange rates on cash and cash equivalents	0	0	0
Increase (Decrease) in cash and cash equivalents	29,111	(94,726)	0
Cash and cash equivalents, including Restricted Cash, beginning of year	(94,726)	0	0
Cash and cash equivalents, including Restricted Cash, end of year	(65,615)	(94,726)	0
Parent | Reportable legal entities
Cash Flows from Operating Activities:
Cash Flows from Operating Activities	(217,819)	(203,403)	(168,389)
Cash Flows from Operating Activities-Discontinued Operations	0	0	0
Cash Flows from Operating Activities	(217,819)	(203,403)	(168,389)
Cash Flows from Investing Activities:
Capital expenditures	0	0	0
Cash paid for acquisitions, net of cash acquired	0	0	0
Intercompany loans to subsidiaries	805,799	(990,635)	175,092
Investment in subsidiaries		(16,170)	(1,585)
Acquisitions of customer relationships and customer inducements	0	0	0
Net proceeds from divestments (see Note 13)	0	0	0
Proceeds from sales of property and equipment and other, net (including real estate) and proceeds from involuntary conversion of property and equipment	0	0	0
Cash Flows from Investing Activities-Continuing Operations	805,799	(1,006,805)	173,507
Cash Flows from Investing Activities-Discontinued Operations	0	0	0
Cash Flows from Investing Activities	805,799	(1,006,805)	173,507
Cash Flows from Financing Activities:
Repayment of revolving credit and term loan facilities, bridge facilities and other debt	0	(262,579)	(1,163,654)
Proceeds from revolving credit and term loan facilities, bridge facilities and other debt	0	224,660	1,150,628
Early retirement of senior subordinated notes		(1,031,554)
Net proceeds from sales of senior notes		2,134,870	492,500
Debit (payments) balances under cash pools	0	0
Debt (repayment to) financing from and equity (distribution to) contribution from noncontrolling interests, net	0	0	0
Intercompany loans from parent	0	0	0
Equity contribution from parent		0	0
Parent cash dividends	(673,635)	(439,999)	(505,871)
Net proceeds associated with the Equity Offering, including Over-Allotment Option	76,192
Net proceeds associated with the At The Market (ATM) Program	8,716
Net proceeds (payments) associated with employee stock-based awards	(1,142)	13,095	31,922
Net proceeds associated with the Equity Offering, including Over-Allotment Option		516,462
Excess tax benefit from employee stock-based awards		59,129
Payment of debt financing and stock issuance costs	(412)	(3,848)	(8,389)
Cash Flows from Financing Activities	(590,281)	1,210,236	(2,864)
Cash Flows from Financing Activities-Continuing Operations	(590,281)	1,210,236	(2,864)
Cash Flows from Financing Activities-Discontinued Operations	0	0	0
Effect of exchange rates on cash and cash equivalents	0	0	0
Increase (Decrease) in cash and cash equivalents	(2,301)	28	2,254
Cash and cash equivalents, including Restricted Cash, beginning of year	2,433	2,405	151
Cash and cash equivalents, including Restricted Cash, end of year	132	2,433	2,405
Guarantors | Reportable legal entities
Cash Flows from Operating Activities:
Cash Flows from Operating Activities	877,864	738,256	633,808
Cash Flows from Operating Activities-Discontinued Operations	(995)	(1,345)	1,076
Cash Flows from Operating Activities	876,869	736,911	634,884
Cash Flows from Investing Activities:
Capital expenditures	(312,856)	(235,996)	(192,736)
Cash paid for acquisitions, net of cash acquired	(1,338,888)	(96,946)	4,007
Intercompany loans to subsidiaries	90,569	(344,919)	(166,400)
Investment in subsidiaries		0	(1,585)
Acquisitions of customer relationships and customer inducements	(73,429)	(63,765)	(40,217)
Net proceeds from divestments (see Note 13)	1,019	0	0
Proceeds from sales of property and equipment and other, net (including real estate) and proceeds from involuntary conversion of property and equipment	299	12,963	5,235
Cash Flows from Investing Activities-Continuing Operations	(1,633,286)	(728,663)	(391,696)
Cash Flows from Investing Activities-Discontinued Operations	8,250	0	78,564
Cash Flows from Investing Activities	(1,625,036)	(728,663)	(313,132)
Cash Flows from Financing Activities:
Repayment of revolving credit and term loan facilities, bridge facilities and other debt	(7,355,086)	(8,077,553)	(7,511,941)
Proceeds from revolving credit and term loan facilities, bridge facilities and other debt	8,445,509	7,650,617	7,144,874
Early retirement of senior subordinated notes		0
Net proceeds from sales of senior notes		0	246,250
Debit (payments) balances under cash pools	(45,621)	56,233
Debt (repayment to) financing from and equity (distribution to) contribution from noncontrolling interests, net	0	0	0
Intercompany loans from parent	(856,911)	982,783	(183,454)
Equity contribution from parent		0	1,585
Parent cash dividends	0	0	0
Net proceeds associated with the Equity Offering, including Over-Allotment Option	0
Net proceeds associated with the At The Market (ATM) Program	0
Net proceeds (payments) associated with employee stock-based awards	0	0	0
Net proceeds associated with the Equity Offering, including Over-Allotment Option		0
Excess tax benefit from employee stock-based awards		0
Payment of debt financing and stock issuance costs	(12,391)	(9,391)	(3,489)
Cash Flows from Financing Activities	175,500	602,689	(306,175)
Cash Flows from Financing Activities-Continuing Operations	175,500	602,689	(306,175)
Cash Flows from Financing Activities-Discontinued Operations	0	0	0
Effect of exchange rates on cash and cash equivalents	0	0	0
Increase (Decrease) in cash and cash equivalents	(572,667)	610,937	15,577
Cash and cash equivalents, including Restricted Cash, beginning of year	634,317	23,380	7,803
Cash and cash equivalents, including Restricted Cash, end of year	61,650	634,317	23,380
Non-Guarantor Subsidiaries | Reportable legal entities
Cash Flows from Operating Activities:
Cash Flows from Operating Activities	276,499	189,406	33,912
Cash Flows from Operating Activities-Discontinued Operations	0	(1,946)	(107)
Cash Flows from Operating Activities	276,499	187,460	33,805
Cash Flows from Investing Activities:
Capital expenditures	(147,206)	(107,135)	(125,583)
Cash paid for acquisitions, net of cash acquired	(419,669)	(122,759)	(293,567)
Intercompany loans to subsidiaries	0	0	0
Investment in subsidiaries		0	0
Acquisitions of customer relationships and customer inducements	(25,258)	(11,420)	(10,183)
Net proceeds from divestments (see Note 13)	0	29,236	26,622
Proceeds from sales of property and equipment and other, net (including real estate) and proceeds from involuntary conversion of property and equipment	85,860	(3,626)	2,712
Cash Flows from Investing Activities-Continuing Operations	(506,273)	(215,704)	(399,999)
Cash Flows from Investing Activities-Discontinued Operations	0	0	1,995
Cash Flows from Investing Activities	(506,273)	(215,704)	(398,004)
Cash Flows from Financing Activities:
Repayment of revolving credit and term loan facilities, bridge facilities and other debt	(6,837,053)	(6,089,563)	(4,902,617)
Proceeds from revolving credit and term loan facilities, bridge facilities and other debt	6,906,105	6,041,778	5,118,693
Early retirement of senior subordinated notes		(715,302)
Net proceeds from sales of senior notes		522,078	0
Debit (payments) balances under cash pools	16,510	38,493
Debt (repayment to) financing from and equity (distribution to) contribution from noncontrolling interests, net	(2,523)	9,079	(466)
Intercompany loans from parent	(39,457)	352,771	262,461
Equity contribution from parent		16,170	1,585
Parent cash dividends	0	0	0
Net proceeds associated with the Equity Offering, including Over-Allotment Option	0
Net proceeds associated with the At The Market (ATM) Program	0
Net proceeds (payments) associated with employee stock-based awards	0	0	0
Net proceeds associated with the Equity Offering, including Over-Allotment Option		0
Excess tax benefit from employee stock-based awards		0
Payment of debt financing and stock issuance costs	(3,602)	(1,554)	(5,830)
Cash Flows from Financing Activities	39,980	173,950	473,826
Cash Flows from Financing Activities-Continuing Operations	39,980	173,950	473,826
Cash Flows from Financing Activities-Discontinued Operations	0	0	0
Effect of exchange rates on cash and cash equivalents	(24,563)	27,270	(23,283)
Increase (Decrease) in cash and cash equivalents	(214,357)	172,976	86,344
Cash and cash equivalents, including Restricted Cash, beginning of year	383,675	193,589	107,245
Cash and cash equivalents, including Restricted Cash, end of year	169,318	383,675	193,589
Canada Company | Reportable legal entities
Cash Flows from Operating Activities:
Cash Flows from Operating Activities			41,885
Cash Flows from Operating Activities-Discontinued Operations			1,710
Cash Flows from Operating Activities			43,595
Cash Flows from Investing Activities:
Capital expenditures			(10,284)
Cash paid for acquisitions, net of cash acquired			(2,405)
Intercompany loans to subsidiaries			(20,185)
Investment in subsidiaries			0
Acquisitions of customer relationships and customer inducements			(366)
Net proceeds from divestments (see Note 13)			4,032
Proceeds from sales of property and equipment and other, net (including real estate) and proceeds from involuntary conversion of property and equipment			30
Cash Flows from Investing Activities-Continuing Operations			(29,178)
Cash Flows from Investing Activities-Discontinued Operations			16,153
Cash Flows from Investing Activities			(13,025)
Cash Flows from Financing Activities:
Repayment of revolving credit and term loan facilities, bridge facilities and other debt			(1,273,228)
Proceeds from revolving credit and term loan facilities, bridge facilities and other debt			1,130,193
Net proceeds from sales of senior notes			186,693
Debt (repayment to) financing from and equity (distribution to) contribution from noncontrolling interests, net			0
Intercompany loans from parent			(67,514)
Equity contribution from parent			0
Parent cash dividends			0
Net proceeds (payments) associated with employee stock-based awards			0
Payment of debt financing and stock issuance costs			(895)
Cash Flows from Financing Activities			(24,751)
Cash Flows from Financing Activities-Continuing Operations			(24,751)
Cash Flows from Financing Activities-Discontinued Operations			0
Effect of exchange rates on cash and cash equivalents			(1,891)
Increase (Decrease) in cash and cash equivalents			3,928
Cash and cash equivalents, including Restricted Cash, beginning of year		17,110	13,182
Cash and cash equivalents, including Restricted Cash, end of year			17,110
Canada Company | Non-Guarantor Subsidiaries | Reportable legal entities
Cash Flows from Financing Activities:
Cash and cash equivalents, including Restricted Cash, beginning of year	$ 383,675	210,699
Cash and cash equivalents, including Restricted Cash, end of year		$ 383,675	$ 210,699

Acquisitions (Details)

Acquisitions (Details) $ / shares in Units, € in Thousands, £ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands

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

Dec. 29, 2016USD ($)

Oct. 31, 2016AUD ($)

May 04, 2016USD ($)

May 02, 2016USD ($)shares

Aug. 31, 2018USD ($)

Nov. 30, 2017USD ($)

Oct. 31, 2017USD ($)

Sep. 30, 2017USD ($)$ / sharesshares

Sep. 30, 2017GBP (£)shares

Jul. 31, 2017USD ($)

Jul. 31, 2017EUR (€)

Jun. 30, 2017USD ($)company

Dec. 31, 2016USD ($)city

Dec. 31, 2016EUR (€)city

Nov. 30, 2016region

Mar. 31, 2016USD ($)

Jun. 30, 2017USD ($)

Jun. 30, 2017EUR (€)

Dec. 31, 2018USD ($)company$ / shares

Dec. 31, 2017USD ($)companyacquisition$ / sharesshares

Dec. 31, 2016USD ($)city$ / sharesshares

Dec. 31, 2018USD ($)

Dec. 09, 2016USD ($)

Dec. 09, 2016GBP (£)

Oct. 31, 2016USD ($)

Oct. 31, 2016AUD ($)

Apr. 29, 2016$ / shares

Business Acquisition [Line Items]

Net proceeds from divestments (see Note 13)

$ 1,019

$ 29,236

$ 30,654

Loss on disposition

0

0

16,838

Total Revenues

4,229,251

3,983,016

3,763,929

Income (Loss) from Continuing Operations

$ 386,928

$ 124,385

$ 138,954

Per Share Income (Loss) from Continuing Operations - Basic (in dollars per share) | $ / shares

$ 1.35

$ 0.43

$ 0.53

Per Share Income (Loss) from Continuing Operations - Diluted (in dollars per share) | $ / shares

$ 1.35

$ 0.43

$ 0.53

Recall Holdings Limited

Business Acquisition [Line Items]

Cash consideration

$ 331,800

$ 331,834

Share price (in dollars per share) | $ / shares

$ 36.53

Purchase price

$ 2,166,900

$ 2,166,860

Operating expenditures

$ 140,661

Recall Holdings Limited | Common Stock

Business Acquisition [Line Items]

Issuance of common stock (in shares) | shares

50,233,412

50,233,412

IO Data Center LLC

Business Acquisition [Line Items]

Cash consideration

$ 1,347,046

Purchase price

$ 1,347,000

1,347,046

Number of data centers | data_center

4

Potential additional payments to be made

$ 35,000

Contingent consideration accrual

31,000

$ 31,000

Operating expenditures

$ 28,064

Docufile

Business Acquisition [Line Items]

Purchase price

$ 15,000

Santa Fe Transaction 2016

Business Acquisition [Line Items]

Cash consideration

$ 14,200

€ 13,500

Purchase price

$ 16,000

€ 15,200

Number of regions | region

10

Santa Fe Transaction 2017

Business Acquisition [Line Items]

Purchase price

$ 13,000

€ 11,700

Santa Fe China Transaction

Business Acquisition [Line Items]

Purchase price

$ 16,800

Ransa and Depositos Transaction

Business Acquisition [Line Items]

Purchase price

$ 14,700

Number of companies acquired | company

2

Fileminders Ltd

Business Acquisition [Line Items]

Purchase price

$ 28,500

€ 24,900

FORTRUST

Business Acquisition [Line Items]

Cash consideration

$ 54,500

Share price (in dollars per share) | $ / shares

$ 37.84

Purchase price

$ 137,500

FORTRUST | Common Stock

Business Acquisition [Line Items]

Issuance of common stock (in shares) | shares

2,193,637

2,193,637

2,193,637

Bonded Transaction

Business Acquisition [Line Items]

Purchase price

$ 83,000

£ 62,000

OEC Records Management

Business Acquisition [Line Items]

Purchase price

$ 19,300

Storage and Data Management Company

Business Acquisition [Line Items]

Number of companies acquired | company

10

1

Art Storage Company

Business Acquisition [Line Items]

Number of companies acquired | company

3

1

Storage and Records Management Company

Business Acquisition [Line Items]

Number of companies acquired | acquisition

5

Other 2017 Individually Immaterial Business Acquisitions

Business Acquisition [Line Items]

Purchase price

$ 22,700

Other 2017 Individually Immaterial Business Acquisitions | Maximum

Business Acquisition [Line Items]

Purchase price

$ 5,000

Credit Suisse Data Center Acquisition

Business Acquisition [Line Items]

Purchase price

$ 111,400

£ 34,600

$ 81,000

Number of data centers | data_center

2

2

2

EvoSwitch

Business Acquisition [Line Items]

Cash consideration

$ 222,000

€ 189,000

Potential additional payments to be made

$ 25,000

GRM Document Management

Business Acquisition [Line Items]

Purchase price

$ 34,100

Other 2018 Individually Immaterial Business Acquisitions

Business Acquisition [Line Items]

Purchase price

$ 64,000

Other 2018 Individually Immaterial Business Acquisitions | Maximum

Business Acquisition [Line Items]

Purchase price

18,000

Other 2018 Individually Immaterial Business Acquisitions | Minimum

Business Acquisition [Line Items]

Purchase price

$ 1,000

Initial United States Divestments

Business Acquisition [Line Items]

Number of cities subject to divestment | city

13

13

13

Disposal Group, Disposed of by Sale, Not Discontinued Operations | Australia Divestment Business

Business Acquisition [Line Items]

Divestiture cash consideration received

$ 53,200

$ 70,000

Net proceeds from divestments (see Note 13)

$ 35,000

Amount of consideration received

$ 35,000

Interest rate

3.30%

3.30%

Loss on disposition

$ 15,417

Disposal Group, Disposed of by Sale, Not Discontinued Operations | Australia Divestment Business | Accumulated Foreign Currency Adjustment Attributable to Parent

Business Acquisition [Line Items]

Cumulative translation adjustment reclassified from accumulated other comprehensive items, net

7,099

Disposal Group, Disposed of by Sale, Not Discontinued Operations | Iron Mountain Canadian Divestments

Business Acquisition [Line Items]

Loss on disposition

1,421

Discontinued Operations, Disposed of by Sale | Initial United States Divestments

Business Acquisition [Line Items]

Divestiture cash consideration received

$ 80,000

Net proceeds from divestments (see Note 13)

55,000

Contingent consideration

$ 25,000

Discontinued Operations, Disposed of by Sale | ARKIVE, Inc. Sale

Business Acquisition [Line Items]

Divestiture cash consideration received

$ 50,000

Net proceeds from divestments (see Note 13)

$ 45,000

Discontinued Operations, Disposed of by Sale | UK Divestments

Business Acquisition [Line Items]

Divestiture cash consideration received

$ 2,200

£ 1,800

Disposal Group, Held-for-sale, Not Discontinued Operations | Australia Divestment Business And Iron Mountain Canadian Divestments

Business Acquisition [Line Items]

Total revenues

46,655

Total income from continuing operations

$ 2,603

Acquisitions - Schedule of Purc

Acquisitions - Schedule of Purchase Price Allocation (Details) € in Thousands, $ in Thousands	May 25, 2018USD ($)	May 25, 2018EUR (€)	Jan. 10, 2018USD ($)	May 02, 2016USD ($)	Nov. 30, 2017USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Consideration paid for acquisitions
Accrued Purchase Price and Other Holdbacks (see Note 6)						$ 35,218	$ 20,093	$ 0
Fair Value of Identifiable Assets Acquired:
Goodwill Initially Recorded						4,441,030	4,070,267
Net cash paid and received for previous acquisitions						(23,967)	(137)	182
Recall Holdings Limited
Consideration paid for acquisitions
Cash Paid (gross of cash acquired)				$ 331,800				331,834
Accrued Purchase Price and Other Holdbacks (see Note 6)								0
Fair Value of Common Stock Issued								1,835,026
Fair Value of Noncontrolling Interests								0
Total Consideration				$ 2,166,900				2,166,860
Fair Value of Identifiable Assets Acquired:
Cash								76,461
Accounts Receivable and Prepaid Expenses								176,775
Fair Value of Recall Divestments								121,689
Other Assets								57,563
Property, Plant and Equipment								622,063
Customer Relationship Intangible Assets								709,139
Data Center In-Place Leases								0
Data Center Tenant Relationships								0
Data Center Above-Market Leases								0
Other Intangible Assets								0
Debt Assumed								(792,385)
Accounts Payable, Accrued Expenses and Other Liabilities								(276,814)
Deferred Income Taxes								(164,074)
Data Center Below-Market Leases								0
Total Fair Value of Identifiable Net Assets Acquired								530,417
Goodwill Initially Recorded								1,636,443
Other Acquisitions
Consideration paid for acquisitions
Cash Paid (gross of cash acquired)						432,078	234,314	37,350
Accrued Purchase Price and Other Holdbacks (see Note 6)						35,218	20,093	0
Fair Value of Common Stock Issued						0	83,014	0
Fair Value of Noncontrolling Interests						0	1,507	3,506
Total Consideration						467,296	338,928	40,856
Fair Value of Identifiable Assets Acquired:
Cash						10,227	14,746	576
Accounts Receivable and Prepaid Expenses						13,076	19,309	2,703
Fair Value of Recall Divestments						0	0	0
Other Assets						4,586	5,070	541
Property, Plant and Equipment						225,848	150,878	10,963
Customer Relationship Intangible Assets						44,622	116,028	20,842
Data Center In-Place Leases						36,130	6,300	0
Data Center Tenant Relationships						18,410	0	0
Data Center Above-Market Leases						2,381	0	0
Other Intangible Assets						0	14,487	0
Debt Assumed						(12,312)	(5,287)	0
Accounts Payable, Accrued Expenses and Other Liabilities						(17,206)	(24,869)	(11,504)
Deferred Income Taxes						(43,218)	(18,122)	(2,985)
Data Center Below-Market Leases						(694)	0	0
Total Fair Value of Identifiable Net Assets Acquired						281,850	278,540	21,136
Goodwill Initially Recorded						185,446	60,388	19,720
Cash acquired from acquisition						44,534	14,746	77,037
Series of Individually Immaterial Business Acquisitions and Recall Holdings Limited
Consideration paid for acquisitions
Cash Paid (gross of cash acquired)								369,184
Accrued Purchase Price and Other Holdbacks (see Note 6)								0
Fair Value of Common Stock Issued								1,835,026
Fair Value of Noncontrolling Interests								3,506
Total Consideration								2,207,716
Fair Value of Identifiable Assets Acquired:
Cash								77,037
Accounts Receivable and Prepaid Expenses								179,478
Fair Value of Recall Divestments								121,689
Other Assets								58,104
Property, Plant and Equipment								633,026
Customer Relationship Intangible Assets								729,981
Data Center In-Place Leases								0
Data Center Tenant Relationships								0
Data Center Above-Market Leases								0
Other Intangible Assets								0
Debt Assumed								(792,385)
Accounts Payable, Accrued Expenses and Other Liabilities								(288,318)
Deferred Income Taxes								(167,059)
Data Center Below-Market Leases								0
Total Fair Value of Identifiable Net Assets Acquired								551,553
Goodwill Initially Recorded								$ 1,656,163
IO Data Center LLC
Consideration paid for acquisitions
Cash Paid (gross of cash acquired)						1,347,046
Accrued Purchase Price and Other Holdbacks (see Note 6)						0
Fair Value of Common Stock Issued						0
Fair Value of Noncontrolling Interests						0
Total Consideration			$ 1,347,000			1,347,046
Fair Value of Identifiable Assets Acquired:
Cash						34,307
Accounts Receivable and Prepaid Expenses						7,070
Fair Value of Recall Divestments						0
Other Assets						0
Property, Plant and Equipment						863,027
Customer Relationship Intangible Assets						0
Data Center In-Place Leases						104,340
Data Center Tenant Relationships						77,362
Data Center Above-Market Leases						16,439
Other Intangible Assets						0
Debt Assumed						0
Accounts Payable, Accrued Expenses and Other Liabilities						(36,230)
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 (see Note 6)						35,218
Fair Value of Common Stock Issued						0
Fair Value of Noncontrolling Interests						0
Total Consideration						1,814,342
Fair Value of Identifiable Assets Acquired:
Cash						44,534
Accounts Receivable and Prepaid Expenses						20,146
Fair Value of Recall Divestments						0
Other Assets						4,586
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
Other Intangible Assets						0
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
EvoSwitch
Consideration paid for acquisitions
Cash Paid (gross of cash acquired)	$ 222,000	€ 189,000
Accrued Purchase Price and Other Holdbacks (see Note 6)						$ 18,824
Santa Fe China Transaction
Consideration paid for acquisitions
Accrued Purchase Price and Other Holdbacks (see Note 6)							$ 16,771
Total Consideration					$ 16,800
Customer relationship intangible assets
Fair Value of Identifiable Assets Acquired:
Acquired finite-lived intangible assets, weighted average useful life						10 years	12 years	13 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

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Tax carryforwards
Deemed repatriation tax, cash and liquid assets	15.50%
Deemed repatriation tax, non-liquid assets	8.00%
Undistributed E&P		$ 160,000
Amount included in taxable income related to repatriation of Undistributed E&P		70,900
GILTI estimate	$ 20,791
Benefit for income taxes	(36,263)	(25,947)	$ (44,944)
Net operating loss carryforwards, tax effected	$ 92,952	$ 105,026
Federal tax rate	21.00%	35.00%	35.00%
Reduction to accrued liabilities and other adjustments		$ 12,800
Effective tax rate	10.10%	12.00%	30.60%
Tax adjustment relating to REIT	$ 35,165	$ 78,873	$ 18,526
Foreign tax rate differential	(5,545)	11,949	13,328
Increase in valuation allowance (net operating losses)	(3,568)	4,317	(7,660)
Tax expense		24,791
Tax benefit as a result of the resolution of a tax matter	14,000
Decrease in provision for income taxes from continuing operations			3,260
Incremental foreign earnings	249,200
Increase in gross interest and penalties recorded	1,961	289	1,805
Accrued interest and penalties recorded	$ 7,557	7,061
Normal statute of limitation period, federal tax purpose	3 years
Unrecognized tax benefits	$ 35,320	38,533	$ 59,466	$ 47,685
Unrecognized tax benefits included in other long-term liabilities	32,144	34,003
Deferred income taxes including unrecognized tax benefits	3,176	$ 4,530
Unrecognized tax benefits net of federal benefits	32,677
Unrecognized tax benefits that would impact tax rate	7,767
Unrecognized tax benefits that would impact tax rate, net of federal tax benefit	5,119
Foreign
Tax carryforwards
Net operating loss carryforwards, tax effected	$ 82,485
Net operating loss carryforwards subject to valuation allowance (as a percent)	67.00%
Federal
Tax carryforwards
Net operating loss carryforwards, before tax effect	$ 163,022
Benefit for income taxes	10,382
Net operating loss carryforwards, tax effected	$ 49,436
Minimum
Tax carryforwards
Statute of limitations for state tax	3 years
Maximum
Tax carryforwards
Statute of limitations for state tax	5 years

Income Taxes - Significant Comp

Income Taxes - Significant Components To Deferred Tax Assets and Deferred Tax Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred Tax Assets:
Accrued liabilities and other adjustments	$ 54,506	$ 38,931
Net operating loss carryforwards	92,952	105,026
Federal benefit of unrecognized tax benefits	2,925	3,051
Valuation allowance	(55,666)	(61,756)
Deferred tax assets	94,717	85,252
Deferred Tax Liabilities:
Other assets, principally due to differences in amortization	(166,469)	(168,028)
Plant and equipment principally due to differences in depreciation	(74,147)	(61,530)
Other	(26,260)	0
Deferred tax liabilities	(266,876)	(229,558)
Net deferred tax liability	$ (172,159)	$ (144,306)

Income Taxes - Current and Nonc

Income Taxes - Current and Noncurrent Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Noncurrent deferred tax assets (Included in Other, a component of Other Assets, net)	$ 11,677	$ 11,422
Noncurrent deferred tax liabilities	$ (183,836)	$ (155,728)

Income Taxes - Rollforward of V

Income Taxes - Rollforward of Valuation Allowance (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Tax carryforwards
Net operating loss carryforwards	$ 92,952	$ 105,026
Roll forward of valuation allowance:
Balance at Beginning of the Year	61,756
Balance at the End of the Year	55,666	61,756
Valuation Allowance of Deferred Tax Assets
Roll forward of valuation allowance:
Balance at Beginning of the Year	61,756	71,359	$ 60,009
Charged (Credited) to Expense	3,568	(4,317)	7,660
Currency Translation Adjustments	(9,658)	(5,286)	3,690
Balance at the End of the Year	$ 55,666	$ 61,756	$ 71,359

Income Taxes - Components Of In

Income Taxes - Components Of Income (Loss) From Continuing Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
United States	$ 201,730	$ 161,198	$ 106,223
Canada	53,779	50,019	28,157
Other Foreign	102,402	4,888	12,264
Income (Loss) from Continuing Operations Before Provision (Benefit) for Income Taxes and Gain on Sale of Real Estate	$ 357,911	$ 216,105	$ 146,644

Income Taxes - Income Tax Recon

Income Taxes - Income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Provision (benefit) for income taxes:
Federal-current	$ 703	$ 16,345	$ 52,944
Federal-deferred	(4,675)	(12,655)	(28,127)
State-current	918	3,440	6,096
State-deferred	627	(1,276)	(1,479)
Foreign-current	45,371	42,532	36,272
Foreign-deferred	(6,681)	(22,439)	(20,762)
Changes in income taxes resulting from:
Computed "expected" tax provision	75,161	75,637	51,325
Tax adjustment relating to REIT	(35,165)	(78,873)	(18,526)
Deferred tax adjustment and other taxes due to REIT conversion	0	0	247
State taxes (net of federal tax benefit)	1,599	2,692	3,796
Increase in valuation allowance (net operating losses)	3,568	(4,317)	7,660
Foreign repatriation	0	29,476	510
U.S Federal Rate Reduction	0	(4,685)	0
Reserve accrual (reversal) and audit settlements (net of federal tax benefit)	(13,985)	(9,103)	1,898
Foreign tax rate differential	5,545	(11,949)	(13,328)
Disallowed foreign interest, Subpart F income, and other foreign taxes	903	29,325	7,773
Other, net	(1,363)	(2,256)	3,589
Provision (Benefit) for Income Taxes	$ 36,263	$ 25,947	$ 44,944

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Reconciliation of unrecognized tax benefits:
Gross tax contingencies - beginning of the period	$ 38,533	$ 59,466	$ 47,685
Gross additions based on tax positions related to the current year	3,147	4,067	3,704
Gross additions for tax positions of prior years	981	3,368	12,207
Gross reductions for tax positions of prior years	(2,865)	(2,789)	(1,740)
Lapses of statutes	(4,462)	(2,629)	(2,390)
Settlements	(14)	(22,950)	0
Gross tax contingencies - end of the period	$ 35,320	$ 38,533	$ 59,466

Quarterly Results of Operatio_3

Quarterly Results of Operations (Unaudited) (Details) - USD ($)	Oct. 01, 2018	Oct. 01, 2016	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Total revenues			$ 1,061,489,000	$ 1,060,991,000	$ 1,060,823,000	$ 1,042,458,000	$ 991,235,000	$ 965,661,000	$ 949,806,000	$ 938,876,000	$ 4,225,761,000	$ 3,845,578,000	$ 3,511,453,000
Operating income (loss)			191,844,000	195,746,000	203,359,000	164,559,000	154,405,000	176,756,000	170,194,000	147,755,000	755,508,000	649,109,000	501,606,000
Income from Continuing Operations			158,831,000	78,628,000	93,903,000	45,614,000	24,349,000	25,382,000	83,148,000	58,844,000	376,976,000	191,723,000	103,880,000
Income (Loss) from Discontinued Operations, Net of Tax			0	(11,605,000)	(360,000)	(462,000)	(2,870,000)	(1,058,000)	(2,026,000)	(337,000)	(12,427,000)	(6,291,000)	3,353,000
Net Income (Loss)			158,831,000	67,023,000	93,543,000	45,152,000	21,479,000	24,324,000	81,122,000	58,507,000	364,549,000	185,432,000	107,233,000
Net income (loss) attributable to Iron Mountain Incorporated			$ 158,118,000	$ 67,148,000	$ 93,401,000	$ 44,684,000	$ 22,721,000	$ 24,345,000	$ 78,630,000	$ 58,125,000	$ 363,351,000	$ 183,821,000	$ 104,824,000
Earnings (Losses) per Share—Basic:
Income (Loss) from Continuing Operations (in dollars per share)			$ 0.55	$ 0.28	$ 0.33	$ 0.16	$ 0.09	$ 0.10	$ 0.31	$ 0.22	$ 1.31	$ 0.71	$ 0.41
Income (loss) from discontinued operations, net of tax (in dollars per share)			0	(0.04)	0	0	(0.01)	0	(0.01)	0	(0.04)	(0.02)	0.01
Net income (loss) per share attributable to Iron Mountain Incorporated (in dollars per share)			0.55	0.23	0.33	0.16	0.08	0.09	0.30	0.22	1.27	0.69	0.43
Earnings (Losses) per Share—Diluted:
Income (Loss) from Continuing Operations (in dollars per share)			0.55	0.27	0.33	0.16	0.09	0.10	0.30	0.22	1.31	0.71	0.41
Income (loss) from discontinued operations, net of tax (in dollars per share)			0	(0.04)	0	0	(0.01)	0	(0.01)	0	(0.04)	(0.02)	0.01
Net income (loss) per share attributable to Iron Mountain Incorporated (in dollars per share)			$ 0.55	$ 0.23	$ 0.33	$ 0.16	$ 0.08	$ 0.09	$ 0.30	$ 0.22	$ 1.27	$ 0.69	$ 0.42
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Goodwill and intangible asset impairmentt	$ 0	$ 0					$ 3,011,000				$ 0	$ 3,011,000	$ 0
Decrease in debt extinguishment expense							18,200,000
Decrease in tax provision			$ 19,900,000				$ 5,800,000
Gain related to sale of land and buildings			54,500,000
Gain on disposal/write-down of property, plant and equipment											$ 65,658,000	$ 766,000	$ 898,000
Increase in gains on foreign currency transactions			20,000,000
Initial United States Divestments | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Charge related to resolution of post-closing adjustment to Access Contingent Consideration				$ 11,100,000
Argentina Fire
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on disposal/write-down of property, plant and equipment			$ 8,800,000

Segment Information - Additiona

Segment Information - Additional Information (Details)	12 Months Ended
	Dec. 31, 2018Marketsegment
Segment Reporting [Abstract]
Number of operating segments | segment	6
Number of markets with data center operations | Market	8

Segment Information - Revenue a

Segment Information - Revenue and Expenditures (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment information
Revenues	$ 1,061,489	$ 1,060,991	$ 1,060,823	$ 1,042,458	$ 991,235	$ 965,661	$ 949,806	$ 938,876	$ 4,225,761	$ 3,845,578	$ 3,511,453
Depreciation and Amortization									639,514	522,376	452,326
Depreciation									452,740	406,283	365,526
Amortization									186,774	116,093	86,800
Adjusted EBITDA									1,435,869	1,260,196	1,087,288
Total Assets	11,852,247				10,972,402				11,852,247	10,972,402	9,486,800
Expenditures for Segment Assets									2,317,306	638,021	671,334
Capital Expenditures									460,062	343,131	328,603
Cash Paid for Acquisitions, Net of Cash Acquired									1,758,557	219,705	291,965
Acquisitions of Customer Relationships and Customer Inducements									98,687	75,185	50,766
North American Records and Information Management Business
Segment information
Revenues									2,137,781	2,050,346	1,930,699
North American Records and Information Management Business | Operating Segments
Segment information
Revenues									2,137,781	2,050,346	1,930,699
Depreciation and Amortization									243,415	240,524	215,330
Depreciation									190,493	201,204	186,467
Amortization									52,922	39,320	28,863
Adjusted EBITDA									956,890	884,158	775,717
Total Assets	4,933,269				5,050,240				4,933,269	5,050,240	4,996,216
Expenditures for Segment Assets									196,010	205,531	145,636
Capital Expenditures									115,555	134,785	111,062
Cash Paid for Acquisitions, Net of Cash Acquired									1,551	6,624	(2,591)
Acquisitions of Customer Relationships and Customer Inducements									78,904	64,122	37,165
North American Data Management Business
Segment information
Revenues									393,993	401,640	392,814
North American Data Management Business | Operating Segments
Segment information
Revenues									393,993	401,640	392,814
Depreciation and Amortization									38,850	34,759	26,629
Depreciation									30,066	24,623	20,666
Amortization									8,784	10,136	5,963
Adjusted EBITDA									213,893	223,324	224,522
Total Assets	807,564				839,539				807,564	839,539	826,320
Expenditures for Segment Assets									19,325	31,279	26,054
Capital Expenditures									19,325	31,279	22,731
Cash Paid for Acquisitions, Net of Cash Acquired									0	0	(59)
Acquisitions of Customer Relationships and Customer Inducements									0	0	3,382
Western European Business
Segment information
Revenues									521,555	490,746	447,357
Western European Business | Operating Segments
Segment information
Revenues									521,555	490,746	447,357
Depreciation and Amortization									64,795	64,051	55,427
Depreciation									45,590	47,526	42,458
Amortization									19,205	16,525	12,969
Adjusted EBITDA									180,172	159,142	136,985
Total Assets	1,179,065				911,012				1,179,065	911,012	1,020,439
Expenditures for Segment Assets									63,142	21,853	31,251
Capital Expenditures									39,163	19,782	30,735
Cash Paid for Acquisitions, Net of Cash Acquired									14,579	0	(6,878)
Acquisitions of Customer Relationships and Customer Inducements									9,400	2,071	7,394
Other International Business
Segment information
Revenues									821,333	795,851	659,370
Other International Business | Operating Segments
Segment information
Revenues									821,333	795,851	659,370
Depreciation and Amortization									125,154	119,402	100,645
Depreciation									75,294	78,664	67,465
Amortization									49,860	40,738	33,180
Adjusted EBITDA									243,008	227,312	169,563
Total Assets	2,262,672				2,401,579				2,262,672	2,401,579	2,114,599
Expenditures for Segment Assets									165,167	166,057	365,845
Capital Expenditures									80,275	76,720	62,594
Cash Paid for Acquisitions, Net of Cash Acquired									77,087	80,345	300,451
Acquisitions of Customer Relationships and Customer Inducements									7,805	8,992	2,800
Global Data Center Business
Segment information
Revenues									228,983	37,694	24,249
Global Data Center Business | Operating Segments
Segment information
Revenues									228,983	37,694	24,249
Depreciation and Amortization									105,680	10,224	4,827
Depreciation									58,707	8,617	4,610
Amortization									46,973	1,607	217
Adjusted EBITDA									99,574	11,275	6,212
Total Assets	2,217,505				382,198				2,217,505	382,198	167,757
Expenditures for Segment Assets									1,794,386	86,543	70,060
Capital Expenditures									152,739	32,015	70,060
Cash Paid for Acquisitions, Net of Cash Acquired									1,639,427	54,528	0
Acquisitions of Customer Relationships and Customer Inducements									2,220	0	0
Corporate and Other Business
Segment information
Revenues									122,116	69,301	56,964
Corporate and Other Business | Operating Segments
Segment information
Revenues									122,116	69,301	56,964
Depreciation and Amortization									61,620	53,416	49,468
Depreciation									52,590	45,649	43,860
Amortization									9,030	7,767	5,608
Adjusted EBITDA									(257,668)	(245,015)	(225,711)
Total Assets	$ 452,172				$ 1,387,834				452,172	1,387,834	361,469
Expenditures for Segment Assets									79,276	126,758	32,488
Capital Expenditures									53,005	48,550	31,421
Cash Paid for Acquisitions, Net of Cash Acquired									25,913	78,208	1,042
Acquisitions of Customer Relationships and Customer Inducements									358	0	25
Storage rental
Segment information
Revenues									2,622,455	2,377,557	2,142,905
Storage rental | North American Records and Information Management Business | Operating Segments
Segment information
Revenues									1,222,230	1,221,495	1,150,646
Storage rental | North American Data Management Business | Operating Segments
Segment information
Revenues									273,193	276,416	264,148
Storage rental | Western European Business | Operating Segments
Segment information
Revenues									325,624	303,205	275,659
Storage rental | Other International Business | Operating Segments
Segment information
Revenues									512,358	493,118	393,005
Storage rental | Global Data Center Business | Operating Segments
Segment information
Revenues									218,675	35,839	22,026
Storage rental | Corporate and Other Business | Operating Segments
Segment information
Revenues									70,375	47,484	37,421
Service
Segment information
Revenues									1,603,306	1,468,021	1,368,548
Service | North American Records and Information Management Business | Operating Segments
Segment information
Revenues									915,551	828,851	780,053
Service | North American Data Management Business | Operating Segments
Segment information
Revenues									120,800	125,224	128,666
Service | Western European Business | Operating Segments
Segment information
Revenues									195,931	187,541	171,698
Service | Other International Business | Operating Segments
Segment information
Revenues									308,975	302,733	266,365
Service | Global Data Center Business | Operating Segments
Segment information
Revenues									10,308	1,855	2,223
Service | Corporate and Other Business | Operating Segments
Segment information
Revenues									$ 51,741	$ 21,817	$ 19,543

Segment Information - Reconcili

Segment Information - Reconciliation of Adjusted EBITDA to Income (Loss) from Continuing Operations (Details) - USD ($)	Oct. 01, 2018	Oct. 01, 2016	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Reconciliation of Adjusted EBITDA to income from continuing operations
Adjusted EBITDA											$ 1,435,869,000	$ 1,260,196,000	$ 1,087,288,000
Gain on Sale of Real Estate, Net of Tax											(55,328,000)	(1,565,000)	(2,180,000)
Provision (Benefit) for Income Taxes											36,263,000	25,947,000	44,944,000
Other Expense (Income), Net											(11,692,000)	79,429,000	44,300,000
Interest Expense (Income), Net											409,289,000	353,575,000	310,662,000
Loss (Gain) on Disposal/Write-down of Property, Plant and Equipment (Excluding Real Estate), Net											(9,818,000)	799,000	1,412,000
Depreciation and Amortization											639,514,000	522,376,000	452,326,000
Intangible impairments	$ 0	$ 0					$ 3,011,000				0	3,011,000	0
Income (Loss) from Continuing Operations			$ 158,831,000	$ 78,628,000	$ 93,903,000	$ 45,614,000	$ 24,349,000	$ 25,382,000	$ 83,148,000	$ 58,844,000	376,976,000	191,723,000	103,880,000
Recall and IODC
Reconciliation of Adjusted EBITDA to income from continuing operations
Significant Acquisition Costs											$ 50,665,000	$ 84,901,000	$ 131,944,000

Segment Information - Revenue_2

Segment Information - Revenue and Asset Information by Geography and Service Line (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues by product and service lines
Revenues	$ 1,061,489	$ 1,060,991	$ 1,060,823	$ 1,042,458	$ 991,235	$ 965,661	$ 949,806	$ 938,876	$ 4,225,761	$ 3,845,578	$ 3,511,453
Long-Lived Assets	10,644,133				9,022,087				10,644,133	9,022,087	8,374,693
Records Management
Revenues by product and service lines
Revenues									2,967,922	2,847,691	2,631,895
Data Management
Revenues by product and service lines
Revenues									596,544	574,251	525,086
Information Destruction
Revenues by product and service lines
Revenues									432,312	385,942	330,223
Data Center
Revenues by product and service lines
Revenues									228,983	37,694	24,249
United States
Revenues by product and service lines
Revenues									2,579,847	2,310,296	2,173,782
Long-Lived Assets	6,902,232				5,476,551				6,902,232	5,476,551	5,238,807
United Kingdom
Revenues by product and service lines
Revenues									280,993	246,373	237,032
Long-Lived Assets	547,768				529,233				547,768	529,233	400,937
Canada
Revenues by product and service lines
Revenues									249,505	243,625	230,944
Long-Lived Assets	453,398				500,396				453,398	500,396	463,396
Australia
Revenues by product and service lines
Revenues									155,367	157,333	148,175
Long-Lived Assets	442,755				470,432				442,755	470,432	542,055
Other International
Revenues by product and service lines
Revenues									960,049	887,951	721,520
Long-Lived Assets	$ 2,297,980				$ 2,045,475				2,297,980	2,045,475	1,729,498
North American Records and Information Management Business
Revenues by product and service lines
Revenues									2,137,781	2,050,346	1,930,699
North American Records and Information Management Business | Records Management
Revenues by product and service lines
Revenues									1,751,058	1,706,288	1,629,367
North American Records and Information Management Business | Data Management
Revenues by product and service lines
Revenues									0	0	0
North American Records and Information Management Business | Information Destruction
Revenues by product and service lines
Revenues									386,723	344,058	301,332
North American Records and Information Management Business | Data Center
Revenues by product and service lines
Revenues									0	0	0
North American Data Management Business
Revenues by product and service lines
Revenues									393,993	401,640	392,814
North American Data Management Business | Records Management
Revenues by product and service lines
Revenues									0	0	14,857
North American Data Management Business | Data Management
Revenues by product and service lines
Revenues									384,370	391,346	370,419
North American Data Management Business | Information Destruction
Revenues by product and service lines
Revenues									9,623	10,294	7,538
North American Data Management Business | Data Center
Revenues by product and service lines
Revenues									0	0	0
Western European Business
Revenues by product and service lines
Revenues									521,555	490,746	447,357
Western European Business | Records Management
Revenues by product and service lines
Revenues									443,960	417,221	373,994
Western European Business | Data Management
Revenues by product and service lines
Revenues									77,189	73,389	73,182
Western European Business | Information Destruction
Revenues by product and service lines
Revenues									406	136	181
Western European Business | Data Center
Revenues by product and service lines
Revenues									0	0	0
Other International Business
Revenues by product and service lines
Revenues									821,333	795,851	659,370
Other International Business | Records Management
Revenues by product and service lines
Revenues									708,297	686,988	578,209
Other International Business | Data Management
Revenues by product and service lines
Revenues									77,476	77,413	59,989
Other International Business | Information Destruction
Revenues by product and service lines
Revenues									35,560	31,450	21,172
Other International Business | Data Center
Revenues by product and service lines
Revenues									0	0	0
Global Data Center Business
Revenues by product and service lines
Revenues									228,983	37,694	24,249
Global Data Center Business | Records Management
Revenues by product and service lines
Revenues									0	0	0
Global Data Center Business | Data Management
Revenues by product and service lines
Revenues									0	0	0
Global Data Center Business | Information Destruction
Revenues by product and service lines
Revenues									0	0	0
Global Data Center Business | Data Center
Revenues by product and service lines
Revenues									228,983	37,694	24,249
Corporate and Other Business
Revenues by product and service lines
Revenues									122,116	69,301	56,964
Corporate and Other Business | Records Management
Revenues by product and service lines
Revenues									64,607	37,194	35,468
Corporate and Other Business | Data Management
Revenues by product and service lines
Revenues									57,509	32,103	21,496
Corporate and Other Business | Information Destruction
Revenues by product and service lines
Revenues									0	4	0
Corporate and Other Business | Data Center
Revenues by product and service lines
Revenues									$ 0	$ 0	$ 0

Commitments and Contingencies -

Commitments and Contingencies - Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Operating lease, leased facilities, term low end of range	5 years
Operating lease, leased facilities, term high end of range	10 years
Operating lease, leased facilities, minimum number of renewal options	1 year
Operating lease, leased facilities, renewal option period	5 years
Operating lease, vehicles and office equipment, minimum lease life	1 year
Operating lease, vehicles and office equipment, maximum lease life	7 years
Operating lease rent expense	$ 365,762	$ 350,403	$ 321,337
Operating Lease Payment
2,019	323,454
2,020	293,276
2,021	267,379
2,022	246,128
2,023	221,808
Thereafter	1,287,807
Operating Lease Payment, Total minimum lease payments	2,639,852
Sublease Income
2,019	(7,525)
2,020	(7,200)
2,021	(7,063)
2,022	(6,694)
2,023	(6,409)
Thereafter	(6,279)
Sublease Income, Total minimum lease payments	(41,170)
Capital Leases
2,019	80,513
2,020	71,335
2,021	61,269
2,022	52,832
2,023	44,722
Thereafter	377,750
Capital Leases, Total minimum lease payments	688,421
Less amounts representing interest	(241,248)
Present value of capital lease obligations	$ 447,173

Commitments and Contingencies_2

Commitments and Contingencies - Purchase Commitments (Details) $ in Thousands	Dec. 31, 2018USD ($)
Commitments and Contingencies Disclosure [Abstract]
2,019	$ 232,880
2,020	48,436
2,021	40,112
2,022	20,042
2,023	2,196
Thereafter	1,876
Contractual Obligation	$ 345,542

Commitments and Contingencies_3

Commitments and Contingencies - Additional Information (Details) € in Thousands, box in Thousands, $ in Thousands	1 Months Ended		3 Months Ended	12 Months Ended
	Dec. 31, 2018USD ($)lawsuitclaimfacility	Sep. 30, 2017facility	Dec. 31, 2018USD ($)lawsuitclaimfacility	Dec. 31, 2018USD ($)customerlawsuitclaimfacility	Dec. 31, 2018EUR (€)customerlawsuit	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Jan. 31, 2015customerbox
Commitments and Contingencies
Operating lease, leased facilities, term low end of range				5 years	5 years
Operating lease, leased facilities, term high end of range				10 years	10 years
Operating lease, leased facilities, minimum number of renewal options				1 year	1 year
Operating lease, leased facilities, renewal option period	5 years		5 years	5 years
Operating lease, vehicles and office equipment, minimum lease life				1 year	1 year
Operating lease, vehicles and office equipment, maximum lease life				7 years	7 years
Operating lease rent expense				$ 365,762		$ 350,403	$ 321,337
Self-insured accrual	$ 41,328		$ 41,328	41,328		38,460
Gain on disposal/write-down of property, plant and equipment (excluding real estate), net				$ 65,658		$ 766	$ 898
Number of facilities leased | facility	1,140		1,140	1,140
Litigation
Commitments and Contingencies
Loss contingencies, reasonably possible loss exposure in excess of the amount currently accrued	$ 16,800		$ 16,800	$ 16,800
Italy Fire
Commitments and Contingencies
Number of customer lawsuits | customer				6	6
Number of settled lawsuits | lawsuit				4	4
Number of pending lawsuits | lawsuit	2		2	2
Damages sought (Euros) | €					€ 42,600
Argentina Fire
Commitments and Contingencies
Facility revenue as a percentage of consolidated revenues (less than)				0.50%	0.50%
Insurance proceeds received	$ 13,700
Gain on disposal/write-down of property, plant and equipment (excluding real estate), net			$ 8,800
Insurance Claims
Commitments and Contingencies
Number of pending lawsuits | claim	1		1	1
Number of cartons of customer records lost | box								900
Number of customers impacted by fire | customer								1,200
PUERTO RICO
Commitments and Contingencies
Facility revenue as a percentage of consolidated revenues (less than)				0.50%	0.50%
Number of facilities | facility		4
PUERTO RICO | Hurricane
Commitments and Contingencies
Number of facilities damaged as a result of hurricane | facility		2
Number of facilities owned | facility		1
Number of facilities leased | facility		1

Stockholders' Equity Matters -

Stockholders' Equity Matters - Dividends Declared (Details) - USD ($) $ / shares in Units, $ in Thousands	Jan. 03, 2019	Oct. 25, 2018	Oct. 02, 2018	Jul. 24, 2018	Jul. 02, 2018	May 24, 2018	Apr. 02, 2018	Feb. 14, 2018	Jan. 02, 2018	Oct. 24, 2017	Oct. 02, 2017	Jul. 27, 2017	Jul. 03, 2017	May 24, 2017	Apr. 03, 2017	Feb. 15, 2017	Dec. 30, 2016	Oct. 31, 2016	Sep. 30, 2016	Jul. 27, 2016	Jun. 24, 2016	May 25, 2016	Mar. 21, 2016	Feb. 17, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Subsequent Event [Line Items]
Dividends per share (in dollars per share)		$ 0.6110		$ 0.5875		$ 0.5875		$ 0.5875		$ 0.5875		$ 0.55		$ 0.55		$ 0.55		$ 0.55		$ 0.485		$ 0.485		$ 0.485	$ 2.3753	$ 2.2706	$ 2.0427
Dividends declared			$ 168,148		$ 168,078		$ 167,969		$ 166,319		$ 146,772		$ 145,417		$ 145,235		$ 145,006		$ 127,737		$ 127,469		$ 102,651		$ 683,519	$ 606,476	$ 505,917
Subsequent Event
Subsequent Event [Line Items]
Dividends declared	$ 174,935

Stockholders' Equity Matters _2

Stockholders' Equity Matters - Classification of Dividends Paid (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
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	83.00%	82.10%	45.50%
Qualified ordinary dividends
Class of Stock [Line Items]
Percent of dividends paid	4.80%	17.90%	21.00%
Capital gains
Class of Stock [Line Items]
Percent of dividends paid	5.80%	0.00%	0.00%
Return of capital
Class of Stock [Line Items]
Percent of dividends paid	6.40%	0.00%	33.50%

Stockholders' Equity Matters _3

Stockholders' Equity Matters - Additional Information (Details) $ / shares in Units, $ in Thousands	Oct. 25, 2018$ / shares	Jul. 24, 2018$ / shares	May 24, 2018$ / shares	Feb. 14, 2018$ / shares	Jan. 02, 2018USD ($)	Dec. 12, 2017USD ($)bank$ / sharesshares	Oct. 24, 2017$ / shares	Jul. 27, 2017$ / shares	May 24, 2017$ / shares	Feb. 15, 2017$ / shares	Oct. 31, 2016$ / shares	Jul. 27, 2016$ / shares	May 25, 2016$ / shares	Feb. 17, 2016$ / shares	Oct. 31, 2017USD ($)bank	Dec. 31, 2018USD ($)$ / sharesshares	Dec. 31, 2018USD ($)$ / sharesshares	Dec. 31, 2017USD ($)$ / sharesshares	Dec. 31, 2016USD ($)$ / shares
Class of Stock [Line Items]
Amount of declared distributions																	$ 679,130	$ 603,743	$ 502,863
Dividends per share (in dollars per share) | $ / shares	$ 0.6110	$ 0.5875	$ 0.5875	$ 0.5875			$ 0.5875	$ 0.55	$ 0.55	$ 0.55	$ 0.55	$ 0.485	$ 0.485	$ 0.485			$ 2.3753	$ 2.2706	$ 2.0427
Common stock, par value (in dollars per share) | $ / shares																$ 0.01	$ 0.01	$ 0.01
At The Market (ATM) Equity Program
Class of Stock [Line Items]
Number of banks | bank															10
Sale of stock, authorized amount															$ 500,000
Sale of stock, number of shares issued in transaction (in shares) | shares																0	273,486	1,481,053
Sale of stock consideration received on transaction, gross																	$ 8,800	$ 60,000
Sale of stock, consideration received on transaction																	8,716	59,100
Payment of stock trading commission costs																	90	$ 900
Sale of stock, remaining aggregate sale price of stock available for distribution																$ 431,200	$ 431,200
Equity Offering
Class of Stock [Line Items]
Number of banks | bank						16
Sale of stock, number of shares issued in transaction (in shares) | shares						14,500,000
Sale of stock, consideration received on transaction						$ 516,462
Common stock, par value (in dollars per share) | $ / shares						$ 37
Payments of stock issuance costs per share (in dollars per share) | $ / shares						$ 1.38195
Over-Allotment Option
Class of Stock [Line Items]
Sale of stock, number of shares issued in transaction (in shares) | shares						2,175,000
Sale of stock, consideration received on transaction					$ 76,200

Divestments - Results of Operat

Divestments - Results of Operations (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (Loss) from Discontinued Operations, Net of Tax	$ 0	$ (11,605)	$ (360)	$ (462)	$ (2,870)	$ (1,058)	$ (2,026)	$ (337)	$ (12,427)	$ (6,291)	$ 3,353
Recall Divestments | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total Revenues									0	0	13,047
Income (Loss) from Discontinued Operations Before Provision (Benefit) for Income Taxes									(12,574)	(8,118)	4,105
Provision (Benefit) for Income Taxes									(147)	(1,827)	752
Income (Loss) from Discontinued Operations, Net of Tax									$ (12,427)	$ (6,291)	$ 3,353

Divestments - Additional Inform

Divestments - Additional Information (Details) $ in Thousands, $ in Thousands	May 30, 2017USD ($)	Jun. 30, 2017USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Sep. 28, 2018USD ($)	Oct. 31, 2016USD ($)	Oct. 31, 2016AUD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on disposition			$ 0	$ 0	$ 16,838
Gain on divestiture			0	38,869	0
Fair value of previously held equity interests			$ 0	18,000	0
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Australia Divestment Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on disposition					15,417
Divestiture cash consideration received							$ 53,200	$ 70,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Iron Mountain Canadian Divestments
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on disposition					$ 1,421
Disposal Group, Disposed of by Sale, Not Discontinued Operations | IMFS
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Divestiture cash consideration received						$ 3,000
Disposal Group, Not Discontinued Operations | Russia and Ukraine Divestment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership interest after disposal	25.00%
Gain on divestiture		$ 38,869		38,869
Cumulative translation adjustment	$ 29,100			$ 29,100
Carrying value of net assets excluding goodwill	4,716
Goodwill	3,515
Other Assets | Disposal Group, Not Discontinued Operations | Russia and Ukraine Divestment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Fair value of previously held equity interests	18,000
Equity method investments	$ 20,869

Significant Acquisition Costs -

Significant Acquisition Costs - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Recall Holdings Limited
Recall Transaction Expenditures [Line Items]
Accrued liabilities	$ 2,724
Recall and IODC
Recall Transaction Expenditures [Line Items]
Significant Acquisition Costs	50,665	$ 84,901	$ 131,944
Cost of sales (excluding depreciation and amortization) | Recall and IODC
Recall Transaction Expenditures [Line Items]
Significant Acquisition Costs	7,628	20,493	11,963
Selling, general and administrative expenses | Recall and IODC
Recall Transaction Expenditures [Line Items]
Significant Acquisition Costs	43,037	64,408	119,981
North American Records and Information Management Business | Recall and IODC
Recall Transaction Expenditures [Line Items]
Significant Acquisition Costs	6,202	15,763	14,394
North American Data Management Business | Recall and IODC
Recall Transaction Expenditures [Line Items]
Significant Acquisition Costs	637	2,099	2,581
Western European Business | Recall and IODC
Recall Transaction Expenditures [Line Items]
Significant Acquisition Costs	8,852	20,290	16,173
Other International Business | Recall and IODC
Recall Transaction Expenditures [Line Items]
Significant Acquisition Costs	4,899	9,570	18,842
Global Data Center Business | Recall and IODC
Recall Transaction Expenditures [Line Items]
Significant Acquisition Costs	11,423	0	0
Corporate and Other Business | Recall and IODC
Recall Transaction Expenditures [Line Items]
Significant Acquisition Costs	$ 18,652	$ 37,179	$ 79,954

SCHEDULE III - SCHEDULE OF RE_2

SCHEDULE III - SCHEDULE OF REAL ESTATE AND ACCUMULATED DEPRECIATION (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)facility	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	312
Encumbrances	$ 2,938
Initial cost to Company	2,455,063
Cost capitalized subsequent to acquisition	1,245,244
Gross amount carried at close of current period	3,700,307	$ 2,707,925	$ 2,427,540
Accumulated depreciation at close of current period	$ 1,011,050	$ 909,092	$ 808,481
Number of facilities leased | facility	1,140
North America
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	206
Encumbrances	$ 0
Initial cost to Company	1,986,810
Cost capitalized subsequent to acquisition	1,006,441
Gross amount carried at close of current period	2,993,251
Accumulated depreciation at close of current period	$ 808,925
United States
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	190
Encumbrances	$ 0
Initial cost to Company	1,914,610
Cost capitalized subsequent to acquisition	937,469
Gross amount carried at close of current period	2,852,079
Accumulated depreciation at close of current period	$ 752,014
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	68,972
Gross amount carried at close of current period	141,172
Accumulated depreciation at close of current period	$ 56,911
Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	60
Encumbrances	$ 918
Initial cost to Company	242,987
Cost capitalized subsequent to acquisition	119,800
Gross amount carried at close of current period	362,787
Accumulated depreciation at close of current period	$ 134,156
Latin America
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	37
Encumbrances	$ 2,020
Initial cost to Company	116,111
Cost capitalized subsequent to acquisition	109,475
Gross amount carried at close of current period	225,586
Accumulated depreciation at close of current period	$ 57,137
Asia Pacific
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	109,155
Cost capitalized subsequent to acquisition	9,528
Gross amount carried at close of current period	118,683
Accumulated depreciation at close of current period	$ 10,832
Sharon Hill PAHenderson Dr/Elmwood Ave [Member] | 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	24,153
Cost capitalized subsequent to acquisition	10,314
Gross amount carried at close of current period	34,467
Accumulated depreciation at close of current period	$ 17,150
Sharon Hill PAHenderson Dr/Elmwood Ave [Member] | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Aberdeen Scotland Howemoss Dr [Member] | 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	5,120
Gross amount carried at close of current period	12,090
Accumulated depreciation at close of current period	$ 4,296
Traquair Rd Innerleithen Scotland [Member] | 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	2,092
Gross amount carried at close of current period	2,205
Accumulated depreciation at close of current period	$ 981
Livingston Scotland Houston Industrial Estate [Member] | 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	24,131
Gross amount carried at close of current period	35,648
Accumulated depreciation at close of current period	$ 16,177
Alcala de Henares Spain [Member] | 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	240
Gross amount carried at close of current period	426
Accumulated depreciation at close of current period	$ 324
Alcala de Henares Spain [Member] | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Chileches Spain Calle Bronce [Member] | 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	2,071
Gross amount carried at close of current period	13,082
Accumulated depreciation at close of current period	$ 2,819
Burien Wa307 South140th St [Member] | 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	2,271
Gross amount carried at close of current period	4,349
Accumulated depreciation at close of current period	$ 2,173
Burien Wa307 South140th St [Member] | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Florence Sc230 Prosperity Way [Member] | 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	1,056
Gross amount carried at close of current period	3,902
Accumulated depreciation at close of current period	$ 1,015
Florence Sc230 Prosperity Way [Member] | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Mitchell Street Knoxville Tennessee [Member] | 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	4,526
Gross amount carried at close of current period	5,244
Accumulated depreciation at close of current period	$ 1,818
Mitchell Street Knoxville Tennessee [Member] | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Nashville Tn415 Brick Church Park Dr [Member] | 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	2,312
Cost capitalized subsequent to acquisition	4,191
Gross amount carried at close of current period	6,503
Accumulated depreciation at close of current period	$ 3,674
Nashville Tn415 Brick Church Park Dr [Member] | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Nashville Tn6005 Dana Way [Member] | 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	2,849
Gross amount carried at close of current period	4,676
Accumulated depreciation at close of current period	$ 1,741
Nashville Tn6005 Dana Way [Member] | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
East Brunsick NJ Kimberly Rd [Member] | 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	22,105
Cost capitalized subsequent to acquisition	5,882
Gross amount carried at close of current period	27,987
Accumulated depreciation at close of current period	$ 13,467
Edison NJ3003 Woodbridge Ave [Member] | 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	10,086
Gross amount carried at close of current period	320,490
Accumulated depreciation at close of current period	$ 8,836
Edison NJ3003 Woodbridge Ave [Member] | Asia Pacific | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Freehold NJ 811 Route 33 [Member] | 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	54,175
Gross amount carried at close of current period	92,872
Accumulated depreciation at close of current period	$ 48,720
Newark NJ Court Street [Member] | 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	6,273
Gross amount carried at close of current period	18,007
Accumulated depreciation at close of current period	$ 945
Atlanta Ga1890 Macarthur Blvd [Member] | 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	742
Gross amount carried at close of current period	2,528
Accumulated depreciation at close of current period	$ 1,049
Atlanta Ga1890 Macarthur Blvd [Member] | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Atlanta Ga3881 Old Gordon Rd [Member] | 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	322
Gross amount carried at close of current period	1,507
Accumulated depreciation at close of current period	$ 826
Atlanta Ga3881 Old Gordon Rd [Member] | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Atlanta Ga5319 Tulane Drive Sw [Member] | 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	3,923
Gross amount carried at close of current period	6,731
Accumulated depreciation at close of current period	$ 2,731
Atlanta Ga5319 Tulane Drive Sw [Member] | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Norcross GA 6111 Live Oak Pkwy [Member] | 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	1,087
Gross amount carried at close of current period	4,629
Accumulated depreciation at close of current period	$ 266
Norcross GA 6111 Live Oak Pkwy [Member] | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Carrollton Tx Capital Parkway [Member] | 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	222
Gross amount carried at close of current period	8,521
Accumulated depreciation at close of current period	$ 2,523
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	879
Gross amount carried at close of current period	2,201
Accumulated depreciation at close of current period	$ 1,033
140 Oxmoor Ct, Birmingham, Alabama | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	2,737
Gross amount carried at close of current period	4,374
Accumulated depreciation at close of current period	$ 1,760
1420 North Fiesta Blvd, Gilbert, Arizona | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Phoenix Az615 North 48th Street [Member] | 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	15,110
Gross amount carried at close of current period	438,217
Accumulated depreciation at close of current period	$ 13,283
Phoenix Az615 North 48th Street [Member] | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	7,848
Gross amount carried at close of current period	20,026
Accumulated depreciation at close of current period	$ 4,570
2955 S. 18th Place, Phoenix, Arizona | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	1,047
Gross amount carried at close of current period	8,352
Accumulated depreciation at close of current period	$ 4,771
4449 South 36th St, Phoenix, Arizona | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Scottsdale Az851 Princess Drive [Member] | 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	43
Gross amount carried at close of current period	87,908
Accumulated depreciation at close of current period	$ 3,887
Scottsdale Az851 Princess Drive [Member] | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
3381 East Global Loop, Tucson, 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	1,622
Cost capitalized subsequent to acquisition	4,350
Gross amount carried at close of current period	5,972
Accumulated depreciation at close of current period	$ 2,692
3381 East Global Loop, Tucson, Arizona | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
200 Madrone Way, Felton, 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	760
Cost capitalized subsequent to acquisition	(60)
Gross amount carried at close of current period	700
Accumulated depreciation at close of current period	$ 0
200 Madrone Way, Felton, California | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
13379 Jurupa Ave, Fontana, 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	10,472
Cost capitalized subsequent to acquisition	8,596
Gross amount carried at close of current period	19,068
Accumulated depreciation at close of current period	$ 9,241
13379 Jurupa Ave, Fontana, California | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	1,853
Gross amount carried at close of current period	6,615
Accumulated depreciation at close of current period	$ 2,849
600 Burning Tree Rd, Fullerton, California | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
5086 4th St, Irwindale, 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	6,800
Cost capitalized subsequent to acquisition	2,308
Gross amount carried at close of current period	9,108
Accumulated depreciation at close of current period	$ 3,345
5086 4th St, Irwindale, California | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
6933 Preston Ave, Livermore, 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	14,585
Cost capitalized subsequent to acquisition	13,498
Gross amount carried at close of current period	28,083
Accumulated depreciation at close of current period	$ 9,405
6933 Preston Ave, Livermore, California | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
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 at close of current period	$ 90
1006 North Mansfield, Los Angeles, California | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	24,544
Gross amount carried at close of current period	34,712
Accumulated depreciation at close of current period	$ 12,746
1025 North Highland Ave, Los Angeles, California | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	6,207
Gross amount carried at close of current period	21,379
Accumulated depreciation at close of current period	$ 14,418
1350 West Grand Ave, Oakland, California | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	471
Gross amount carried at close of current period	5,047
Accumulated depreciation at close of current period	$ 1,689
1760 North Saint Thomas Circle, Orange, California | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
8700 Mercury Lane, Pico Rivera, 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	27,957
Cost capitalized subsequent to acquisition	183
Gross amount carried at close of current period	28,140
Accumulated depreciation at close of current period	$ 8,838
8700 Mercury Lane, Pico Rivera, California | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
8661 Kerns St, San Diego, 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	10,512
Cost capitalized subsequent to acquisition	6,690
Gross amount carried at close of current period	17,202
Accumulated depreciation at close of current period	$ 6,832
8661 Kerns St, San Diego, California | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	1,235
Gross amount carried at close of current period	4,655
Accumulated depreciation at close of current period	$ 1,888
1915 South Grand Ave, Santa Ana, California | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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 at close of current period	$ 4,065
2680 Sequoia Dr, South Gate, California | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
111 Uranium Drive, Sunnyvale, 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	9,645
Cost capitalized subsequent to acquisition	5,155
Gross amount carried at close of current period	14,800
Accumulated depreciation at close of current period	$ 4,309
111 Uranium Drive, Sunnyvale, California | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	1,764
Gross amount carried at close of current period	4,813
Accumulated depreciation at close of current period	$ 1,928
25250 South Schulte Rd, Tracy, California | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	4,320
Gross amount carried at close of current period	5,903
Accumulated depreciation at close of current period	$ 1,593
3576 N. Moline, Aurora, Colorado | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
North Stone Ave, Colorado Springs, Colorado | 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	761
Cost capitalized subsequent to acquisition	2,715
Gross amount carried at close of current period	3,476
Accumulated depreciation at close of current period	$ 1,645
North Stone Ave, Colorado Springs, Colorado | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Denver Co4300 Brighton Boulevard [Member] | 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	12,206
Gross amount carried at close of current period	128,542
Accumulated depreciation at close of current period	$ 4,565
Denver Co4300 Brighton Boulevard [Member] | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	10,168
Gross amount carried at close of current period	17,571
Accumulated depreciation at close of current period	$ 8,708
11333 E 53rd Ave, Denver, Colorado | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	133
Gross amount carried at close of current period	6,445
Accumulated depreciation at close of current period	$ 1,330
5151 E. 46th Ave, Denver, Colorado | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	1,867
Gross amount carried at close of current period	9,284
Accumulated depreciation at close of current period	$ 5,909
20 Eastern Park Rd, East Hartford, Connecticut | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	926
Gross amount carried at close of current period	2,694
Accumulated depreciation at close of current period	$ 1,286
Bennett Rd, Suffield, Connecticut | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	30,824
Gross amount carried at close of current period	41,271
Accumulated depreciation at close of current period	$ 18,845
Kennedy Road, Windsor, Connecticut | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	1,476
Gross amount carried at close of current period	5,497
Accumulated depreciation at close of current period	$ 2,707
293 Ella Grasso Rd, Windsor Locks, Connecticut | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	997
Gross amount carried at close of current period	8,223
Accumulated depreciation at close of current period	$ 4,861
150-200 Todds Ln, Wilmington, Delaware | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	533
Gross amount carried at close of current period	2,386
Accumulated depreciation at close of current period	$ 865
13280 Vantage Way, Jacksonville, Florida | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	2,957
Gross amount carried at close of current period	6,250
Accumulated depreciation at close of current period	$ 2,971
12855 Starkey Rd, Largo, Florida | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Kimberly Rd East Brunsick New Jersey [Member] | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Miramar Fl7801 Riviera Blvd [Member] | 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	64
Gross amount carried at close of current period	8,314
Accumulated depreciation at close of current period	$ 593
Miramar Fl7801 Riviera Blvd [Member] | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	295
Gross amount carried at close of current period	2,222
Accumulated depreciation at close of current period	$ 834
10002 Satellite Blvd, Orlando, Florida | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	13,545
Gross amount carried at close of current period	17,746
Accumulated depreciation at close of current period	$ 6,334
3501 Electronics Way, West Palm Beach, Florida | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Route33811 Freehold New Jersey [Member] | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	745
Gross amount carried at close of current period	1,208
Accumulated depreciation at close of current period	$ 699
3150 Nifda Dr, Smyrna, Georgia | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	18,915
Gross amount carried at close of current period	26,862
Accumulated depreciation at close of current period	$ 15,084
1301 S. Rockwell St, Chicago, Illinois | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	13,490
Gross amount carried at close of current period	17,754
Accumulated depreciation at close of current period	$ 7,862
2211 W. Pershing Rd, Chicago, Illinois | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	1,471
Gross amount carried at close of current period	8,941
Accumulated depreciation at close of current period	$ 4,058
2425 South Halsted St, Chicago, Illinois | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	2,733
Gross amount carried at close of current period	3,137
Accumulated depreciation at close of current period	$ 2,729
2604 West 13th St, Chicago, Illinois | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	3,892
Gross amount carried at close of current period	5,881
Accumulated depreciation at close of current period	$ 1,350
2255 Pratt Blvd, Elk Grove, Illinois | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	1,481
Gross amount carried at close of current period	23,529
Accumulated depreciation at close of current period	$ 8,763
4175 Chandler Dr Opus No. Corp, Hanover Park, Illinois | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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 at close of current period	$ 189
2600 Beverly Drive, Lincoln, Illinois | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
6120 Churchman Bypass, Indianapolis, Indiana | 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	4,827
Cost capitalized subsequent to acquisition	8,321
Gross amount carried at close of current period	13,148
Accumulated depreciation at close of current period	$ 5,896
6120 Churchman Bypass, Indianapolis, Indiana | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	482
Gross amount carried at close of current period	1,104
Accumulated depreciation at close of current period	$ 373
6090 NE 14th Street, Des Moines, Iowa | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	12,543
Gross amount carried at close of current period	13,252
Accumulated depreciation at close of current period	$ 4,708
South 7th St, Louisville, Kentucky | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
900 Distributors Row, New Orleans, Louisiana | 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	7,607
Cost capitalized subsequent to acquisition	1,307
Gross amount carried at close of current period	8,914
Accumulated depreciation at close of current period	$ 5,780
900 Distributors Row, New Orleans, Louisiana | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
1274 Commercial Drive, Port Allen, Louisiana | 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	2,680
Cost capitalized subsequent to acquisition	3,887
Gross amount carried at close of current period	6,567
Accumulated depreciation at close of current period	$ 2,782
1274 Commercial Drive, Port Allen, Louisiana | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	286
Gross amount carried at close of current period	8,623
Accumulated depreciation at close of current period	$ 2,909
26 Parkway Drive (fka 133 Pleasant), Scarborough, Maine | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	6,406
Gross amount carried at close of current period	8,604
Accumulated depreciation at close of current period	$ 3,278
8928 McGaw Ct, Columbia, Maryland | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	1,127
Gross amount carried at close of current period	4,909
Accumulated depreciation at close of current period	$ 2,443
10641 Iron Bridge Rd, Jessup, Maryland | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
8275 Patuxent Range 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	10,105
Cost capitalized subsequent to acquisition	7,679
Gross amount carried at close of current period	17,784
Accumulated depreciation at close of current period	$ 9,420
8275 Patuxent Range Rd, Jessup, Maryland | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	3,895
Gross amount carried at close of current period	7,116
Accumulated depreciation at close of current period	$ 3,507
96 High St, Billerica, Massachusetts | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	742
Gross amount carried at close of current period	906
Accumulated depreciation at close of current period	$ 510
120 Hampden St, Boston, Massachusetts | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	5,374
Gross amount carried at close of current period	7,194
Accumulated depreciation at close of current period	$ 5,163
32 George St, Boston, Massachusetts | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	788
Gross amount carried at close of current period	2,699
Accumulated depreciation at close of current period	$ 2,022
3435 Sharps Lot Rd, Dighton, Massachusetts | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	135
Gross amount carried at close of current period	5,548
Accumulated depreciation at close of current period	$ 570
77 Constitution Boulevard, Franklin, Massachusetts | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	1,079
Gross amount carried at close of current period	2,377
Accumulated depreciation at close of current period	$ 1,194
216 Canal St, Lawrence, Massachusetts | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	24,897
Gross amount carried at close of current period	80,820
Accumulated depreciation at close of current period	$ 39,580
Bearfoot Road, Northboro, Massachusetts | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	1,237
Gross amount carried at close of current period	11,522
Accumulated depreciation at close of current period	$ 3,554
38300 Plymouth Road, Livonia, Michigan | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	1,124
Gross amount carried at close of current period	2,418
Accumulated depreciation at close of current period	$ 1,206
6601 Sterling Dr South, Sterling Heights, Michigan | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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 at close of current period	$ 1,040
1985 Bart Ave, Warren, Michigan | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	2,613
Gross amount carried at close of current period	6,039
Accumulated depreciation at close of current period	$ 3,528
Wahl Court, Warren, Michigan | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	1,372
Gross amount carried at close of current period	5,372
Accumulated depreciation at close of current period	$ 2,503
31155 Wixom Rd, Wixom, Michigan | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	3,331
Gross amount carried at close of current period	6,403
Accumulated depreciation at close of current period	$ 2,149
3140 Ryder Trail South, Earth City, Missouri | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Hazelwood MO Missouri Bottom Road [Member] [Member] | 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	28,282
Cost capitalized subsequent to acquisition	4,158
Gross amount carried at close of current period	32,440
Accumulated depreciation at close of current period	$ 6,738
Hazelwood MO Missouri Bottom Road [Member] [Member] | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	18,968
Gross amount carried at close of current period	21,892
Accumulated depreciation at close of current period	$ 6,715
Leavenworth St/18th St, Omaha, Nebraska | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	8,909
Gross amount carried at close of current period	12,339
Accumulated depreciation at close of current period	$ 5,426
4105 North Lamb Blvd, Las Vegas, Nevada | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Austin Tx6600 Metropolis Drive [Member] | 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	396
Gross amount carried at close of current period	4,915
Accumulated depreciation at close of current period	$ 1,187
Austin Tx6600 Metropolis Drive [Member] | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	4,180
Gross amount carried at close of current period	10,359
Accumulated depreciation at close of current period	$ 6,160
17 Hydro Plant Rd, Milton, New Hampshire | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	660
Gross amount carried at close of current period	10,182
Accumulated depreciation at close of current period	$ 634
560 Irvine Turner Blvd, Newark, New Jersey | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	1,202
Gross amount carried at close of current period	10,147
Accumulated depreciation at close of current period	$ 655
231 Johnson Ave, Newark, New Jersey | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	11,686
Gross amount carried at close of current period	15,271
Accumulated depreciation at close of current period	$ 5,442
650 Howard Avenue, Somerset, New Jersey | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
555 Gallatin Place, Albuquerque, New Mexico | 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	4,083
Cost capitalized subsequent to acquisition	852
Gross amount carried at close of current period	4,935
Accumulated depreciation at close of current period	$ 2,440
555 Gallatin Place, Albuquerque, New Mexico | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
7500 Los Volcanes Rd NW, Albuquerque, New Mexico | 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	2,801
Cost capitalized subsequent to acquisition	1,942
Gross amount carried at close of current period	4,743
Accumulated depreciation at close of current period	$ 2,613
7500 Los Volcanes Rd NW, Albuquerque, New Mexico | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	10,979
Gross amount carried at close of current period	12,303
Accumulated depreciation at close of current period	$ 6,111
100 Bailey Ave, Buffalo, New York | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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 at close of current period	$ 3,357
64 Leone Ln, Chester, New York | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	4,525
Gross amount carried at close of current period	7,136
Accumulated depreciation at close of current period	$ 4,387
1368 County Rd 8, Farmington, New York | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	2,959
Gross amount carried at close of current period	3,061
Accumulated depreciation at close of current period	$ 1,511
County Rd 10, Linlithgo, New York | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	1,417
Gross amount carried at close of current period	7,136
Accumulated depreciation at close of current period	$ 2,515
77 Seaview Blvd, N. Hempstead, New York | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	1,099
Gross amount carried at close of current period	5,422
Accumulated depreciation at close of current period	$ 2,075
37 Hurds Corner Road, Pawling, New York | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	10,401
Gross amount carried at close of current period	33,538
Accumulated depreciation at close of current period	$ 21,265
Ulster Ave/Route 9W, Port Ewen, New York | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	11,312
Gross amount carried at close of current period	16,454
Accumulated depreciation at close of current period	$ 6,250
Binnewater Rd, Rosendale, New York | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	2,615
Gross amount carried at close of current period	5,544
Accumulated depreciation at close of current period	$ 2,741
220 Wavel St, Syracuse, New York | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	2,035
Gross amount carried at close of current period	7,524
Accumulated depreciation at close of current period	$ 3,913
11406 Metric Blvd, Austin, Texas | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Morrisvile NJ 826 Church St [Member] | 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	153
Gross amount carried at close of current period	7,240
Accumulated depreciation at close of current period	$ 1,116
Morrisvile NJ 826 Church St [Member] | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	2,113
Gross amount carried at close of current period	3,993
Accumulated depreciation at close of current period	$ 1,749
14500 Weston Pkwy, Cary, North Carolina | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
11350 Deerfield Rd, Cincinnati, 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	4,259
Cost capitalized subsequent to acquisition	599
Gross amount carried at close of current period	4,858
Accumulated depreciation at close of current period	$ 2,653
11350 Deerfield Rd, Cincinnati, Ohio | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
1034 Hulbert Ave, Cincinnati, 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	786
Cost capitalized subsequent to acquisition	877
Gross amount carried at close of current period	1,663
Accumulated depreciation at close of current period	$ 815
1034 Hulbert Ave, Cincinnati, Ohio | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	576
Gross amount carried at close of current period	3,705
Accumulated depreciation at close of current period	$ 1,924
1275 East 40th, Cleveland, Ohio | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	3,259
Gross amount carried at close of current period	6,595
Accumulated depreciation at close of current period	$ 2,901
7208 Euclid Avenue, Cleveland, Ohio | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	1,810
Gross amount carried at close of current period	2,840
Accumulated depreciation at close of current period	$ 1,405
4260 Tuller Ridge Rd, Dublin, Ohio | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Miamisburg OH3366 South Tech Blvd [Member] | 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	57
Gross amount carried at close of current period	29,149
Accumulated depreciation at close of current period	$ 962
Miamisburg OH3366 South Tech Blvd [Member] | Latin America | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
2120 Buzick Drive, Obetz, 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	4,317
Cost capitalized subsequent to acquisition	15,070
Gross amount carried at close of current period	19,387
Accumulated depreciation at close of current period	$ 7,396
2120 Buzick Drive, Obetz, Ohio | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	1,079
Gross amount carried at close of current period	1,681
Accumulated depreciation at close of current period	$ 683
302 South Byrne Rd, Toledo, Ohio | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Partnership Drive, Oklahoma City, Oklahoma | 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	11,437
Cost capitalized subsequent to acquisition	299
Gross amount carried at close of current period	11,736
Accumulated depreciation at close of current period	$ 2,950
Partnership Drive, Oklahoma City, Oklahoma | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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 at close of current period	$ 4,005
7530 N. Leadbetter Road, Portland, Oregon | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	224,322
Gross amount carried at close of current period	245,488
Accumulated depreciation at close of current period	$ 53,526
Branchton Rd, Boyers, Pennsylvania | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
1201 Freedom Rd, Cranberry Township, 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	1,057
Cost capitalized subsequent to acquisition	12,627
Gross amount carried at close of current period	13,684
Accumulated depreciation at close of current period	$ 6,692
1201 Freedom Rd, Cranberry Township, Pennsylvania | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	953
Gross amount carried at close of current period	3,410
Accumulated depreciation at close of current period	$ 1,959
800 Carpenters Crossings, Folcroft, Pennsylvania | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
36 Great Valley Pkwy, Malvern, 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	2,397
Cost capitalized subsequent to acquisition	7,048
Gross amount carried at close of current period	9,445
Accumulated depreciation at close of current period	$ 4,057
36 Great Valley Pkwy, Malvern, Pennsylvania | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Palmer Township PA 2300 Newlin Mill Rd [Member] | 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	18,365
Cost capitalized subsequent to acquisition	7,313
Gross amount carried at close of current period	25,678
Accumulated depreciation at close of current period	$ 674
Palmer Township PA 2300 Newlin Mill Rd [Member] | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Henderson Dr/Elmwood Ave, Sharon Hill, Pennsylvania | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	3,426
Gross amount carried at close of current period	7,611
Accumulated depreciation at close of current period	$ 4,129
Las Flores Industrial Park, Rio Grande, Puerto Rico | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	2,202
Gross amount carried at close of current period	4,861
Accumulated depreciation at close of current period	$ 2,732
24 Snake Hill Road, Chepachet, Rhode Island | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Columbia Sc1061 Carolina Pines Rd [Member] | 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	1,693
Gross amount carried at close of current period	13,469
Accumulated depreciation at close of current period	$ 2,766
Columbia Sc1061 Carolina Pines Rd [Member] | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Capital Parkway, Carrollton, Texas | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
1800 Columbian Club Dr, Carrollton, 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	1,163
Gross amount carried at close of current period	20,836
Accumulated depreciation at close of current period	$ 8,725
1800 Columbian Club Dr, Carrollton, Texas | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
1905 John Connally Dr, Carrollton, 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	746
Gross amount carried at close of current period	2,920
Accumulated depreciation at close of current period	$ 1,290
1905 John Connally Dr, Carrollton, Texas | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	3,475
Gross amount carried at close of current period	6,993
Accumulated depreciation at close of current period	$ 4,055
13425 Branchview Ln, Dallas, Texas | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	1,554
Gross amount carried at close of current period	2,831
Accumulated depreciation at close of current period	$ 1,948
Cockrell Ave, Dallas, Texas | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	812
Gross amount carried at close of current period	4,027
Accumulated depreciation at close of current period	$ 2,426
1819 S. Lamar St, Dallas, Texas | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Bogor Indonesia Jalan Karanggan [Member] | 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	(444)
Gross amount carried at close of current period	7,453
Accumulated depreciation at close of current period	$ 1,316
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	610
Gross amount carried at close of current period	5,938
Accumulated depreciation at close of current period	$ 2,769
2000 Robotics Place Suite B, Fort Worth, Texas | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	2,059
Gross amount carried at close of current period	10,413
Accumulated depreciation at close of current period	$ 5,592
1202 Ave R, Grand Prairie, Texas | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	37,476
Gross amount carried at close of current period	43,803
Accumulated depreciation at close of current period	$ 11,332
15333 Hempstead Hwy, Houston, Texas | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	1,741
Gross amount carried at close of current period	4,581
Accumulated depreciation at close of current period	$ 2,426
2600 Center Street, Houston, Texas | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	597
Gross amount carried at close of current period	8,284
Accumulated depreciation at close of current period	$ 5,612
3502 Bissonnet St, Houston, Texas | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	2,379
Gross amount carried at close of current period	5,846
Accumulated depreciation at close of current period	$ 2,548
5249 Glenmont Ave, Houston, Texas | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	1,046
Gross amount carried at close of current period	2,078
Accumulated depreciation at close of current period	$ 1,037
5707 Chimney Rock, Houston, Texas | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	994
Gross amount carried at close of current period	2,789
Accumulated depreciation at close of current period	$ 1,221
5757 Royalton Dr, Houston, Texas | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	11,467
Gross amount carried at close of current period	14,655
Accumulated depreciation at close of current period	$ 8,244
6203 Bingle Rd, Houston, Texas | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	1,203
Gross amount carried at close of current period	7,526
Accumulated depreciation at close of current period	$ 1,651
7800 Westpark, Houston, Texas | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	1,958
Gross amount carried at close of current period	3,638
Accumulated depreciation at close of current period	$ 1,189
9601 West Tidwell, Houston, Texas | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	7,910
Gross amount carried at close of current period	11,721
Accumulated depreciation at close of current period	$ 4,594
15300 FM 1825, Pflugerville, Texas | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
929 South Medina St, 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	3,883
Cost capitalized subsequent to acquisition	1,312
Gross amount carried at close of current period	5,195
Accumulated depreciation at close of current period	$ 2,553
929 South Medina St, San Antonio, Texas | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Av Madrid S N Poligono Industrial Matillas [Member] | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	230
Gross amount carried at close of current period	623
Accumulated depreciation at close of current period	$ 236
930 Avenue B, San Antonio, Texas | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	962
Gross amount carried at close of current period	4,488
Accumulated depreciation at close of current period	$ 2,753
931 North Broadway, San Antonio, Texas | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	4,215
Gross amount carried at close of current period	10,454
Accumulated depreciation at close of current period	$ 4,850
1665 S. 5350 West, Salt Lake City, Utah | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	1,890
Gross amount carried at close of current period	3,599
Accumulated depreciation at close of current period	$ 1,712
11052 Lakeridge Pkwy, Ashland, Virginia | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
2301 International Parkway, Fredricksburg, 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	27
Gross amount carried at close of current period	21,007
Accumulated depreciation at close of current period	$ 5,157
2301 International Parkway, Fredricksburg, Virginia | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	1,021
Gross amount carried at close of current period	7,548
Accumulated depreciation at close of current period	$ 3,053
4555 Progress Road, Norfolk, Virginia | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	129
Gross amount carried at close of current period	2,706
Accumulated depreciation at close of current period	$ 974
3725 Thirlane Rd. N.W., Roanoke, Virginia | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	2,649
Gross amount carried at close of current period	16,816
Accumulated depreciation at close of current period	$ 9,156
7700-7730 Southern Dr, Springfield, Virginia | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
7700-7730 Southern Dr, Springfield, Virginia | Latin America | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
8001 Research Way, 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	5,230
Cost capitalized subsequent to acquisition	2,656
Gross amount carried at close of current period	7,886
Accumulated depreciation at close of current period	$ 3,123
8001 Research Way, Springfield, Virginia | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	3,719
Gross amount carried at close of current period	11,317
Accumulated depreciation at close of current period	$ 5,697
22445 Randolph Dr, Sterling, Virginia | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
1 Serangoon North Avenue 6 [Member] | Asia [Member] | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
1 Serangoon North Avenue 6 [Member] | 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	(1,688)
Gross amount carried at close of current period	56,949
Accumulated depreciation at close of current period	$ 3,049
8908 W. Hallett Rd, Cheney, WA | 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	4,253
Gross amount carried at close of current period	4,763
Accumulated depreciation at close of current period	$ 1,880
8908 W. Hallett Rd, Cheney, WA | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	3,348
Gross amount carried at close of current period	8,747
Accumulated depreciation at close of current period	$ 3,315
6600 Hardeson Rd, Everett, Washington | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Kent Wa19826 Russell Rd [Member] | 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	14,793
Cost capitalized subsequent to acquisition	9,324
Gross amount carried at close of current period	24,117
Accumulated depreciation at close of current period	$ 10,004
Seattle Wa120 N.96th St [Member] | 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	2,036
Gross amount carried at close of current period	6,532
Accumulated depreciation at close of current period	$ 3,348
Spokane Wa4330 South Grove Rd [Member] | 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	820
Gross amount carried at close of current period	4,726
Accumulated depreciation at close of current period	$ 336
Wauwatsa Wi12021 West Bluemound Road [Member] | 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	2,124
Gross amount carried at close of current period	3,431
Accumulated depreciation at close of current period	$ 1,344
19826 Russell Rd South, Kent, Washington | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
1201 N. 96th St, Seattle, Washington | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
4330 South Grove Road, Spokane, Washington | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
12021 West Bluemound Rd, Wauwatosa, Wisconsin | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	4,072
Gross amount carried at close of current period	7,919
Accumulated depreciation at close of current period	$ 3,642
One Command Court, Bedford | Canada | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	5,661
Gross amount carried at close of current period	11,064
Accumulated depreciation at close of current period	$ 4,639
195 Summerlea Road, Brampton | Canada | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	15,941
Gross amount carried at close of current period	20,948
Accumulated depreciation at close of current period	$ 6,726
10 Tilbury Court, Brampton | Canada | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	1,444
Gross amount carried at close of current period	9,535
Accumulated depreciation at close of current period	$ 4,120
8825 Northbrook Court, Burnaby | Canada | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	6,584
Gross amount carried at close of current period	10,910
Accumulated depreciation at close of current period	$ 4,091
8088 Glenwood Drive, Burnaby | Canada | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	7,145
Gross amount carried at close of current period	21,803
Accumulated depreciation at close of current period	$ 9,898
5811 26th Street S.E., Calgary | Canada | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	469
Gross amount carried at close of current period	2,489
Accumulated depreciation at close of current period	$ 1,414
3905 - 101 Street, Edmonton | Canada | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Kingston 68 Grant Timmins Drive [Member] | 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	430
Gross amount carried at close of current period	4,069
Accumulated depreciation at close of current period	$ 202
Kingston 68 Grant Timmins Drive [Member] | Canada | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	(8)
Gross amount carried at close of current period	2,743
Accumulated depreciation at close of current period	$ 1,243
3005 Boul. Jean-Baptiste Deschamps, Lachine | Canada | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	16,896
Gross amount carried at close of current period	25,092
Accumulated depreciation at close of current period	$ 11,108
1655 Fleetwood, Laval | Canada | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Howemoss Drive Aberdeen Scotland [Member] | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	1,802
Gross amount carried at close of current period	3,602
Accumulated depreciation at close of current period	$ 1,475
4005 Richelieu, Montreal | Canada | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Traquair Road Innerleithen Scotland [Member] | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	5,861
Gross amount carried at close of current period	6,920
Accumulated depreciation at close of current period	$ 3,551
1209 Algoma Rd, Ottawa | Canada | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Nettlehill Road Houston Industrial Estate Livingston Scotland [Member] | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	(404)
Gross amount carried at close of current period	7,074
Accumulated depreciation at close of current period	$ 2,360
1650 Comstock Rd, Ottawa | Canada | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	1,532
Gross amount carried at close of current period	2,361
Accumulated depreciation at close of current period	$ 737
235 Edson Street, Saskatoon | Canada | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Chiloeches Guadalajara Calle Bronce37 [Member] | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	(106)
Gross amount carried at close of current period	1,747
Accumulated depreciation at close of current period	$ 568
640 Coronation Drive, Scarborough | Canada | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	1,653
Gross amount carried at close of current period	2,896
Accumulated depreciation at close of current period	$ 1,137
610 Sprucewood Ave, Windsor | Canada | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	7,121
Gross amount carried at close of current period	13,663
Accumulated depreciation at close of current period	$ 2,946
Gewerbeparkstr. 3, Vienna, Austria | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	6,438
Gross amount carried at close of current period	8,979
Accumulated depreciation at close of current period	$ 3,926
Woluwelaan 147, Diegem, Belgium | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Stupničke Šipkovine 62 [Member] | 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	(34)
Gross amount carried at close of current period	1,374
Accumulated depreciation at close of current period	$ 17
Stupničke Šipkovine 62 [Member] | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Nicosia Cyprus Industrial District [Member] | 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	659
Gross amount carried at close of current period	3,795
Accumulated depreciation at close of current period	$ 201
Nicosia Cyprus Industrial District [Member] | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Limassol Cyprus Agios Sylas Industrial Area [Member] | 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	282
Gross amount carried at close of current period	2,217
Accumulated depreciation at close of current period	$ 132
Limassol Cyprus Agios Sylas Industrial Area [Member] | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	2,508
Gross amount carried at close of current period	4,258
Accumulated depreciation at close of current period	$ 2,110
Jeumont-Schneider, Champagne Sur Seine, France | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Coignieres France, Bat I-VII Rue de Osiers [Member] | 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	840
Gross amount carried at close of current period	22,158
Accumulated depreciation at close of current period	$ 2,993
Coignieres France, Bat I-VII Rue de Osiers [Member] | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Fergersheim France26 Rue de I Industrie [Member] | 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	(55)
Gross amount carried at close of current period	1,267
Accumulated depreciation at close of current period	$ 176
Fergersheim France26 Rue de I Industrie [Member] | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Gue de Longroi FranceBat A,B,C1,C2,C3 Rue Imperiale [Member] | 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	784
Gross amount carried at close of current period	4,174
Accumulated depreciation at close of current period	$ 628
Gue de Longroi FranceBat A,B,C1,C2,C3 Rue Imperiale [Member] | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Mingieres FranceLe Petit Courtin Site de Dois Gueslin [Member] | 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	11
Gross amount carried at close of current period	14,152
Accumulated depreciation at close of current period	$ 1,364
Mingieres FranceLe Petit Courtin Site de Dois Gueslin [Member] | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Morangis FranceZI des Sables [Member] | Europe
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Encumbrances	$ 918
Initial cost to Company	12,407
Cost capitalized subsequent to acquisition	15,111
Gross amount carried at close of current period	27,518
Accumulated depreciation at close of current period	$ 18,505
Saint Priest France45 Rue de Savoie Manissieux [Member] | 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	(75)
Gross amount carried at close of current period	5,471
Accumulated depreciation at close of current period	$ 586
Saint Priest France45 Rue de Savoie Manissieux [Member] | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Hamburg GermanyGutenbergstrabe 55 [Member] | 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	739
Gross amount carried at close of current period	4,761
Accumulated depreciation at close of current period	$ 711
Hamburg GermanyGutenbergstrabe 55 [Member] | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
ZI des Sables, Morangis, France | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	1,619
Gross amount carried at close of current period	4,839
Accumulated depreciation at close of current period	$ 3,218
Brommer Weg 1, Wipshausen, Germany | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	2,797
Gross amount carried at close of current period	11,837
Accumulated depreciation at close of current period	$ 4,244
Warehouse and Offices 4 Springhill, Cork, Ireland | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	810
Gross amount carried at close of current period	3,628
Accumulated depreciation at close of current period	$ 1,267
17 Crag Terrace, Dublin, Ireland | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	7,350
Gross amount carried at close of current period	23,384
Accumulated depreciation at close of current period	$ 6,986
Damastown Industrial Park, Dublin, Ireland | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	1,936
Gross amount carried at close of current period	3,788
Accumulated depreciation at close of current period	$ 2,082
Portsmuiden 46, Amsterdam, The Netherlands | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	(633)
Gross amount carried at close of current period	625
Accumulated depreciation at close of current period	$ 283
Schepenbergweg 1, Amsterdam, The Netherlands | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	1,500
Gross amount carried at close of current period	2,857
Accumulated depreciation at close of current period	$ 2,106
Vareseweg 130, Rotterdam, The Netherlands | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	5,497
Gross amount carried at close of current period	9,478
Accumulated depreciation at close of current period	$ 5,910
Ctra M.118 , Km.3 Parcela 3, Madrid, Spain | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Fundicion 8, Rivas-Vaciamadrid, 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	1,022
Cost capitalized subsequent to acquisition	2,389
Gross amount carried at close of current period	3,411
Accumulated depreciation at close of current period	$ 1,969
Fundicion 8, Rivas-Vaciamadrid, Spain | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	(60)
Gross amount carried at close of current period	993
Accumulated depreciation at close of current period	$ 440
Abanto Ciervava, Spain | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
628 Western Avenue, Acton, United Kingdom | 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	2,070
Cost capitalized subsequent to acquisition	(291)
Gross amount carried at close of current period	1,779
Accumulated depreciation at close of current period	$ 754
628 Western Avenue, Acton, United Kingdom | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
65 Egerton Road, Birmingham, United Kingdom | 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	1,259
Gross amount carried at close of current period	8,239
Accumulated depreciation at close of current period	$ 4,519
65 Egerton Road, Birmingham, United Kingdom | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Corby278 Long Croft Road [Member] | 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	(877)
Gross amount carried at close of current period	19,609
Accumulated depreciation at close of current period	$ 177
Corby278 Long Croft Road [Member] | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Otterham Quay Lane, Gillingham, United Kingdom | 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	2,670
Gross amount carried at close of current period	10,088
Accumulated depreciation at close of current period	$ 4,857
Otterham Quay Lane, Gillingham, United Kingdom | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Pennine Way, Hemel Hempstead, United Kingdom | 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	5,516
Gross amount carried at close of current period	16,363
Accumulated depreciation at close of current period	$ 6,447
Pennine Way, Hemel Hempstead, United Kingdom | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Kemble Industrial Park, Kemble, United Kingdom | 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	6,558
Gross amount carried at close of current period	11,835
Accumulated depreciation at close of current period	$ 7,951
Kemble Industrial Park, Kemble, United Kingdom | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Gayton Road, Kings Lynn, United Kingdom | 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	1,617
Gross amount carried at close of current period	4,736
Accumulated depreciation at close of current period	$ 2,680
Gayton Road, Kings Lynn, United Kingdom | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Cody Road, London, United Kingdom | 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	20,307
Cost capitalized subsequent to acquisition	8,033
Gross amount carried at close of current period	28,340
Accumulated depreciation at close of current period	$ 10,244
Cody Road, London, United Kingdom | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Unit 10 High Cross Centre, London, United Kingdom | 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	3,598
Cost capitalized subsequent to acquisition	544
Gross amount carried at close of current period	4,142
Accumulated depreciation at close of current period	$ 1,219
Unit 10 High Cross Centre, London, United Kingdom | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Old Poplar Bus Garage, London, United Kingdom | 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	4,639
Cost capitalized subsequent to acquisition	1,647
Gross amount carried at close of current period	6,286
Accumulated depreciation at close of current period	$ 3,416
Old Poplar Bus Garage, London, United Kingdom | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
17 Broadgate, Oldham, United Kingdom | 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	192
Gross amount carried at close of current period	4,231
Accumulated depreciation at close of current period	$ 2,156
17 Broadgate, Oldham, United Kingdom | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Harpway Lane, Sopley, United Kingdom | 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	1,372
Gross amount carried at close of current period	2,053
Accumulated depreciation at close of current period	$ 1,277
Harpway Lane, Sopley, United Kingdom | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
2235 Cessna Drive, Burlington, North Carolina [Member] | 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 at close of current period	$ 167
2235 Cessna Drive, Burlington, North Carolina [Member] | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Unit 1A Broadmoor Road, Swindom, United Kingdom | 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	372
Gross amount carried at close of current period	3,008
Accumulated depreciation at close of current period	$ 1,062
Unit 1A Broadmoor Road, Swindom, United Kingdom | Europe | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Amancio Alcorta 2396, Buenos Aires, Argentina | Latin America
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	2,227
Gross amount carried at close of current period	2,882
Accumulated depreciation at close of current period	$ 724
Amancio Alcorta 2396, Buenos Aires, Argentina | Latin America | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Azara 1245, Buenos Aires, Argentina | Latin America
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	(162)
Gross amount carried at close of current period	4
Accumulated depreciation at close of current period	$ 0
Azara 1245, Buenos Aires, Argentina | Latin America | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Saraza 6135, Buenos Aires, Argentina | Latin America
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	144
Cost capitalized subsequent to acquisition	345
Gross amount carried at close of current period	489
Accumulated depreciation at close of current period	$ 161
Saraza 6135, Buenos Aires, Argentina | Latin America | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Spegazzini, Ezeiza Buenos Aires, Argentina | Latin America
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	(7,806)
Gross amount carried at close of current period	4,967
Accumulated depreciation at close of current period	$ 729
Spegazzini, Ezeiza Buenos Aires, Argentina | Latin America | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Bairro Fim do Campo Jarinu Brazil Av Ernest de Moraes 815 [Member] | Latin America
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	(2,149)
Gross amount carried at close of current period	10,413
Accumulated depreciation at close of current period	$ 1,135
Bairro Fim do Campo Jarinu Brazil Av Ernest de Moraes 815 [Member] | Latin America | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Jundiai Brazil Rua Peri 80 [Member] | Latin America
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	(1,609)
Gross amount carried at close of current period	7,285
Accumulated depreciation at close of current period	$ 851
Jundiai Brazil Rua Peri 80 [Member] | Latin America | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Francisco de Souza e Melo, Rio de Janerio, Brazil | Latin America
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	8,087
Gross amount carried at close of current period	9,955
Accumulated depreciation at close of current period	$ 2,827
Francisco de Souza e Melo, Rio de Janerio, Brazil | Latin America | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Hortolandia, Sao Paulo, Brazil | Latin America
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	2,100
Gross amount carried at close of current period	26,178
Accumulated depreciation at close of current period	$ 2,945
Hortolandia, Sao Paulo, Brazil | Latin America | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
El Taqueral 99, Santiago, Chile | Latin America
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	2,629
Cost capitalized subsequent to acquisition	34,372
Gross amount carried at close of current period	37,001
Accumulated depreciation at close of current period	$ 9,662
El Taqueral 99, Santiago, Chile | Latin America | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Panamericana Norte 18900, Santiago, Chile | Latin America
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	17,900
Gross amount carried at close of current period	21,901
Accumulated depreciation at close of current period	$ 7,928
Panamericana Norte 18900, Santiago, Chile | Latin America | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Avenida Prolongacion del Colli 1104, Guadalajara, Mexico | Latin America
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	1,061
Gross amount carried at close of current period	1,435
Accumulated depreciation at close of current period	$ 895
Avenida Prolongacion del Colli 1104, Guadalajara, Mexico | Latin America | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Privada Las Flores No. 25 (G3), Guadalajara, Mexico | Latin America
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	993
Gross amount carried at close of current period	1,898
Accumulated depreciation at close of current period	$ 888
Privada Las Flores No. 25 (G3), Guadalajara, Mexico | Latin America | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Huehuetoca Mexico Tula KM Parque de Las [Member] | Latin America
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	(1,910)
Gross amount carried at close of current period	18,027
Accumulated depreciation at close of current period	$ 1,825
Huehuetoca Mexico Tula KM Parque de Las [Member] | Latin America | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Carretera Pesqueria Km2.5(M3), Monterrey, Mexico | Latin America
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	3,227
Gross amount carried at close of current period	6,764
Accumulated depreciation at close of current period	$ 2,328
Carretera Pesqueria Km2.5(M3), Monterrey, Mexico | Latin America | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Lote 2, Manzana A, (T2& T3), Toluca, Mexico | Latin America
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	3,561
Gross amount carried at close of current period	5,765
Accumulated depreciation at close of current period	$ 4,352
Lote 2, Manzana A, (T2& T3), Toluca, Mexico | Latin America | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Prolongacion de la Calle 7 (T4), Toluca, Mexico | Latin America
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	12,049
Gross amount carried at close of current period	19,593
Accumulated depreciation at close of current period	$ 6,731
Prolongacion de la Calle 7 (T4), Toluca, Mexico | Latin America | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Panamericana Sur, KM 57.5, Lima, Peru | Latin America
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	7
Encumbrances	$ 2,020
Initial cost to Company	1,549
Cost capitalized subsequent to acquisition	685
Gross amount carried at close of current period	2,234
Accumulated depreciation at close of current period	$ 1,206
Panamericana Sur, KM 57.5, Lima, Peru | Latin America | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Av. Elmer Faucett 3462, Lima, Peru | Latin America
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	4,112
Cost capitalized subsequent to acquisition	4,691
Gross amount carried at close of current period	8,803
Accumulated depreciation at close of current period	$ 4,456
Av. Elmer Faucett 3462, Lima, Peru | Latin America | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Calle Los Claveles-Seccion 3, Lima, Peru | Latin America
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	31,813
Gross amount carried at close of current period	39,992
Accumulated depreciation at close of current period	$ 7,494
Calle Los Claveles-Seccion 3, Lima, Peru | Latin America | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
8 Whitestone Drive, Austins Ferry, Australia | 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	681
Cost capitalized subsequent to acquisition	2,550
Gross amount carried at close of current period	3,231
Accumulated depreciation at close of current period	$ 335
8 Whitestone Drive, Austins Ferry, Australia | Asia Pacific | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
6 Norwich Street, South Launceston, Australia | 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	1,090
Cost capitalized subsequent to acquisition	(77)
Gross amount carried at close of current period	1,013
Accumulated depreciation at close of current period	$ 74
6 Norwich Street, South Launceston, Australia | Asia Pacific | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
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	769
Gross amount carried at close of current period	2,299
Accumulated depreciation at close of current period	$ 452
Warehouse No 4, Shanghai, China | Asia Pacific | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Singapore 2 Yung Ho Rd [Member] | 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	3,667
Gross amount carried at close of current period	14,062
Accumulated depreciation at close of current period	$ 1,144
Singapore 2 Yung Ho Rd [Member] | Asia Pacific | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Singapore 26 Chin Bee Drive [Member] | 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	(465)
Gross amount carried at close of current period	15,234
Accumulated depreciation at close of current period	$ 1,240
Singapore 26 Chin Bee Drive [Member] | Asia Pacific | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
Bangkok ThailandIC1 69 Moo 2 [Member] | 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	5,216
Gross amount carried at close of current period	18,442
Accumulated depreciation at close of current period	$ 3,222
Bangkok ThailandIC1 69 Moo 2 [Member] | Asia Pacific | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years
51-69 & 77-81 Court St, Newark, New Jersey [Member] | United States | Maximum
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	40 years

SCHEDULE III - SCHEDULE OF RE_3

SCHEDULE III - SCHEDULE OF REAL ESTATE AND ACCUMULATED DEPRECIATION (Details 2) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)facility	Dec. 31, 2017USD ($)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Aggregate Cost of Real Estate Assets	$ 3,400,000
Book Value of Racking Included in Leased Facilities	$ 1,270,992
Number of facilities leased | facility	1,140
Accumulated Depreciation, Non-Real Estate Assets	$ 1,292,432
Accumulated Depreciation, Racking In Lease Facilities	707,628
Accumulated Depreciation, Capital Leases	100,282
Accumulated Depreciation, Reconciling Items	2,100,342
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$ 3,111,392	$ 2,833,421
Facilities | facility	312
Activity in Real Estate
Gross amount at beginning of year	$ 2,707,925	2,427,540
Additions during period:
Acquisitions	918,091	121,790
Discretionary capital projects	155,901	94,658
Foreign currency translation fluctuations	(58,798)	66,666
Total additions	1,015,194	283,114
Deductions during period:
Cost of real estate sold or disposed	(22,812)	(2,729)
Gross amount at end of year	3,700,307	2,707,925
Change in accumulated depreciation
Gross amount of accumulation depreciation at beginning of year:	909,092	808,481
Additions during period:
Depreciation	125,280	83,488
Foreign currency translation fluctuations	(16,016)	18,183
Total additions	109,264	101,671
Deductions during period
Amount of accumulated depreciation for real estate assets sold or disposed	(7,306)	(1,060)
Gross amount of end of period	1,011,050	$ 909,092
Encumbrances	2,938
Initial cost to Company	2,455,063
Cost capitalized subsequent to acquisition	1,245,244
Book value Capital Leases	444,711
Construction in Progress, Gross	196,268
Real Estate Gross, Reconciling Items	1,911,971
Real Estate, Gross	$ 5,612,278
Asia Pacific
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	9
Deductions during period:
Gross amount at end of year	$ 118,683
Deductions during period
Gross amount of end of period	10,832
Encumbrances	0
Initial cost to Company	109,155
Cost capitalized subsequent to acquisition	$ 9,528
Bogor Indonesia Jalan Karanggan [Member] | Asia Pacific
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Deductions during period:
Gross amount at end of year	$ 7,453
Deductions during period
Gross amount of end of period	1,316
Encumbrances	0
Initial cost to Company	7,897
Cost capitalized subsequent to acquisition	$ (444)
1 Serangoon North Avenue 6 [Member] | Asia Pacific
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Deductions during period:
Gross amount at end of year	$ 56,949
Deductions during period
Gross amount of end of period	3,049
Encumbrances	0
Initial cost to Company	58,637
Cost capitalized subsequent to acquisition	$ (1,688)
Bangkok ThailandIC1 69 Moo 2 [Member] | Asia Pacific
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	2
Deductions during period:
Gross amount at end of year	$ 18,442
Deductions during period
Gross amount of end of period	3,222
Encumbrances	0
Initial cost to Company	13,226
Cost capitalized subsequent to acquisition	$ 5,216
Singapore 26 Chin Bee Drive [Member] | Asia Pacific
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Deductions during period:
Gross amount at end of year	$ 15,234
Deductions during period
Gross amount of end of period	1,240
Encumbrances	0
Initial cost to Company	15,699
Cost capitalized subsequent to acquisition	$ (465)
Singapore 2 Yung Ho Rd [Member] | Asia Pacific
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Facilities | facility	1
Deductions during period:
Gross amount at end of year	$ 14,062
Deductions during period
Gross amount of end of period	1,144
Encumbrances	0
Initial cost to Company	10,395
Cost capitalized subsequent to acquisition	$ 3,667

Uncategorized Items - irm-20181

Label	Element	Value
Accounting Standards Update 2014-09 [Member] | Accumulated Distributions in Excess of Net Income [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ (30,233,000)