CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 187,263	$ 562,149	$ 452,725
Other Comprehensive Income (Loss):
Foreign Currency Translation Adjustment	80,657	(113,966)	(136,410)
Change in fair value of derivative instruments	(2,454)	9,829	52,380
Reclassifications from Accumulated Other Comprehensive Items, net	(7,580)	0	0
Total Other Comprehensive Income (Loss)	70,623	(104,137)	(84,030)
Comprehensive Income (Loss)	257,886	458,012	368,695
Comprehensive Income (Loss) Attributable to Noncontrolling Interests	2,805	4,687	930
Comprehensive Income (Loss) Attributable to Iron Mountain Incorporated	$ 255,081	$ 453,325	$ 367,765