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RISK MANAGEMENT AND USE OF FINANCIAL INSTRUMENTS (Details) - USD ($) $ in Thousands		12 Months Ended
	Jan. 24, 2019	Dec. 31, 2021	Dec. 31, 2019	Dec. 23, 2021	Dec. 31, 2020	Dec. 24, 2018	Apr. 04, 2017	Dec. 17, 2013
Derivative financial instruments
Settlement of hedge transactions			$ 807
Amount estimated to be reclassified as an increase to interest expense		$ 100
Loss Reclassified from Accumulated OCI into Income		$ 100
CubeSmart, L.P. and Subsidiaries
Derivative financial instruments
Settlement of hedge transactions			$ 807
Senior notes 4.375% due December 15, 2023
Derivative financial instruments
Senior notes, principal amount	$ 300,000				$ 300,000
Interest rate (as a percent)	4.375%	4.375%		4.375%			4.375%	4.375%
Designated as an accounting hedge \| Cash flow \| Interest rate swap
Derivative financial instruments
Notional Amount						$ 150,000
Settlement of hedge transactions	$ 800