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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 108,284	$ 65,744	$ 231,211	$ 196,574
Other Comprehensive (Loss) Income:
Foreign Currency Translation Adjustment	(83,595)	(24,769)	(71,195)	(132,290)
Change in Fair Value of Derivative Instruments	(1,496)	1,980	(9,101)	4,183
Total Other Comprehensive (Loss) Income	(85,091)	(22,789)	(80,296)	(128,107)
Comprehensive Income (Loss)	23,193	42,955	150,915	68,467
Comprehensive (Loss) Income Attributable to Noncontrolling Interests	(100)	(2,104)	1,777	(3,351)
Comprehensive Income (Loss) Attributable to Iron Mountain Incorporated	$ 23,293	$ 45,059	$ 149,138	$ 71,818

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