CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 91,391	$ 192,931	$ 158,069	$ 436,496
Other Comprehensive (Loss) Income:
Foreign Currency Translation Adjustment	(80,168)	(175,098)	(21,907)	(335,431)
Change in Fair Value of Derivative Instruments	6,184	32,233	10,638	83,210
Reclassifications from Accumulated Other Comprehensive Items, net	(2,527)	0	(5,054)	0
Total Other Comprehensive (Loss) Income:	(76,511)	(142,865)	(16,323)	(252,221)
Comprehensive Income (Loss)	14,880	50,066	141,746	184,275
Comprehensive (Loss) Income Attributable to Noncontrolling Interests	(404)	408	1,994	865
Comprehensive Income (Loss) Attributable to Iron Mountain Incorporated	$ 15,284	$ 49,658	$ 139,752	$ 183,410