Quarterly report pursuant to Section 13 or 15(d)

Organization - Additional Information (Detail)

v3.21.2
Organization - Additional Information (Detail)
6 Months Ended
Jun. 30, 2021
Property
State
shares
Dec. 31, 2020
shares
Jun. 30, 2020
Organization [Line Items]      
Number of self-storage properties owned and managed 970    
Number of states in which self-storage properties owned and managed | State 33    
Number of properties managed under joint ventures 104    
Number of properties managed with no ownership 236    
Noncontrolling limited partnership unit redemption value one common share or cash    
Geographic Concentration Risk [Member] | Texas [Member] | Revenue [Member]      
Organization [Line Items]      
Concentration risk, percentage 18.00%    
Geographic Concentration Risk [Member] | Florida [Member] | Revenue [Member]      
Organization [Line Items]      
Concentration risk, percentage 13.00%    
Life Storage LP [Member]      
Organization [Line Items]      
Units of redeemable noncontrolling interest in operating partnership | shares 332,399 334,149  
Life Storage LP [Member]      
Organization [Line Items]      
Percentage of ownership interest of the subsidiary and its limited partnership which controls the operations of the Operating Partnership 99.60%    
Warehouse Anywhere LLC [Member]      
Organization [Line Items]      
Percentage of ownership interest of the subsidiary and its limited partnership which controls the operations of the Operating Partnership     60.00%