CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 1,143	$ 201,858	$ 66,678	$ 243,565
Other Comprehensive Income (Loss):
Foreign Currency Translation Adjustment	18,035	(187,786)	58,261	(160,333)
Change in Fair Value of Derivative Instruments	7,896	34,211	4,454	50,977
Reclassifications from Accumulated Other Comprehensive Items, net	(2,527)	0	(2,527)	0
Total Other Comprehensive Income (Loss):	23,404	(153,575)	60,188	(109,356)
Comprehensive Income (Loss)	24,547	48,283	126,866	134,209
Comprehensive Income (Loss) Attributable to Noncontrolling Interests	909	819	2,398	457
Comprehensive Income (Loss) Attributable to Iron Mountain Incorporated	$ 23,638	$ 47,464	$ 124,468	$ 133,752