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