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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 38,562	$ 108,284	$ 96,341	$ 231,211
Other Comprehensive Income (Loss):
Foreign Currency Translation Adjustment	44,883	(83,595)	(109,742)	(71,195)
Change in Fair Value of Derivative Instruments	(184)	(1,496)	(11,507)	(9,101)
Total Other Comprehensive Income (Loss)	44,699	(85,091)	(121,249)	(80,296)
Comprehensive Income (Loss)	83,261	23,193	(24,908)	150,915
Comprehensive Income (Loss) Attributable to Noncontrolling Interests	522	(100)	406	1,777
Comprehensive Income (Loss) Attributable to Iron Mountain Incorporated	$ 82,739	$ 23,293	$ (25,314)	$ 149,138

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