Quarterly report pursuant to Section 13 or 15(d)

Investment in Storage Facilities and Intangible Assets - Additional Information (Detail)

v3.20.2
Investment in Storage Facilities and Intangible Assets - Additional Information (Detail)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
USD ($)
Mar. 31, 2020
USD ($)
Property
Jun. 30, 2019
USD ($)
$ / shares
Jun. 30, 2020
USD ($)
Property
Jun. 30, 2019
USD ($)
$ / shares
Investment Holdings [Line Items]          
Number of storage facilities acquired | Property   6   6  
Cash payment for property acquisition       $ 124,204  
Received return on investment       6,086 $ 4,865
Net other liabilities assumed       $ 100  
Amortization period for in-place customer leases on a straight-line basis       12 months  
Amortization expense related to in-place customer leases $ 1,500   $ 500 $ 2,800 900
Increase in depreciation expense due to facility replacement     $ 100   $ 800
Estimate increase in depreciation expense due to facility replacement during remainder of 2020 $ 2,200     $ 2,200  
Accelerated depreciation reduced basic and diluted earnings per share | $ / shares         $ 0.02
Maximum [Member]          
Investment Holdings [Line Items]          
Accelerated depreciation reduced basic and diluted earnings per share | $ / shares     $ 0.01    
191 III Life Storage Holdings LLC [Member]          
Investment Holdings [Line Items]          
Number of storage facilities acquired | Property   6      
Company common ownership interest   20.00%      
Cash payment for property acquisition   $ 124,200      
Received return on investment   $ 8,400