v3.26.1
NONCONTROLLING INTERESTS - Operating Partnership Ownership (Details) - CubeSmart, L.P. and Subsidiaries - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
NONCONTROLLING INTERESTS          
OP units redeemed 0 38,965   91,465  
Cash redemptions of OP units     19,011    
Outstanding units of noncontrolling interest in the Operating Partnership (in shares) 984,229 1,103,240 984,229 1,103,240 1,003,240
Redemption value of OP units owned by third parties $ 39.1   $ 39.1