XML 67 R45.htm IDEA: XBRL DOCUMENT v3.25.3
Summary of Significant Accounting Policies - Income (Loss) Per Share, Basic and Diluted (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Income (Loss) Per Share-Basic and Diluted        
Net Income (Loss) $ 86,241 $ (33,665) $ 59,134 $ 77,981
Less: Net Income (Loss) Attributable to Noncontrolling Interests 1,951 (45) 3,813 1,757
Net Income (Loss) Attributable to Iron Mountain Incorporated (utilized in numerator of Earnings Per Share calculation) $ 84,290 $ (33,620) $ 55,321 $ 76,224
Weighted-average shares—basic (in shares) 295,771,000 293,603,000 295,214,000 293,229,000
Effect of dilutive potential stock options (in shares) 1,898,000 0 2,020,000 2,143,000
Effect of dilutive potential RSUs and PUs (in shares) 312,000 0 394,000 540,000
Weighted-average shares—diluted (in shares) 297,981,000 293,603,000 297,628,000 295,912,000
Net Income (Loss) Per Share Attributable to Iron Mountain Incorporated:        
Basic (in dollars per share) $ 0.28 $ (0.11) $ 0.19 $ 0.26
Diluted (in dollars per share) $ 0.28 $ (0.11) $ 0.19 $ 0.26
Antidilutive stock options, RSUs and PUs, excluded from the calculation (in shares) 102,248 3,083,222 112,101 293,457