Quarterly report pursuant to Section 13 or 15(d)

Investment in Joint Ventures - Summary of Company's Unconsolidated Joint Ventures (Detail)

v3.21.2
Investment in Joint Ventures - Summary of Company's Unconsolidated Joint Ventures (Detail)
$ in Thousands
Jun. 30, 2021
USD ($)
Property
Dec. 31, 2020
USD ($)
Sovran HHF Storage Holdings LLC [Member]    
Schedule of Equity Method Investments [Line Items]    
Number of Properties | Property 36  
Company common ownership interest 20.00%  
Carrying value of investment $ 59,500 $ 60,500
Sovran HHF Storage Holdings II LLC [Member]    
Schedule of Equity Method Investments [Line Items]    
Number of Properties | Property 22  
Company common ownership interest 15.00%  
Carrying value of investment $ (4,700) 27,300
Life Storage-SERS Storage LLC [Member]    
Schedule of Equity Method Investments [Line Items]    
Number of Properties | Property 3  
Company common ownership interest 20.00%  
Carrying value of investment $ 3,000 3,000
Life Storage-HIERS Storage LLC [Member]    
Schedule of Equity Method Investments [Line Items]    
Number of Properties | Property 17  
Company common ownership interest 20.00%  
Carrying value of investment $ 14,000 14,300
191 V Life Storage Holdings, LLC [Member]    
Schedule of Equity Method Investments [Line Items]    
Number of Properties | Property 17  
Company common ownership interest 20.00%  
Carrying value of investment $ 28,400
Iskalo Office Holdings, LLC [Member]    
Schedule of Equity Method Investments [Line Items]    
Company common ownership interest 49.00%  
Carrying value of investment $ (2,400) (2,500)
Life Storage Spacemax, LLC [Member]    
Schedule of Equity Method Investments [Line Items]    
Number of Properties | Property 6  
Company common ownership interest 40.00%  
Carrying value of investment $ 14,900 16,700
Life Storage Virtus, LLC [Member]    
Schedule of Equity Method Investments [Line Items]    
Number of Properties | Property 1  
Company common ownership interest 20.00%  
Carrying value of investment $ 1,300 1,500
SNL Orix Merrick, LLC [Member]    
Schedule of Equity Method Investments [Line Items]    
Number of Properties | Property  
Company common ownership interest 5.00%  
Carrying value of investment 2,500
Joint Ventures with Properties in Development Stage [Member]    
Schedule of Equity Method Investments [Line Items]    
Number of Properties | Property 7  
Company common ownership interest  
Carrying value of investment $ 11,700 10,400
Other Unconsolidated Joint Ventures [Member]    
Schedule of Equity Method Investments [Line Items]    
Number of Properties | Property 6  
Company common ownership interest  
Carrying value of investment $ 6,700 $ 6,800