Quarterly report pursuant to Section 13 or 15(d)

Investment in Joint Ventures - Company's Share of Unconsolidated Joint Ventures' Income (Loss) (Detail)

v3.19.1
Investment in Joint Ventures - Company's Share of Unconsolidated Joint Ventures' Income (Loss) (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Schedule of Equity Method Investments [Line Items]    
Income (loss) from equity method investments $ 811 $ 972
Sovran HHF Storage Holdings LLC [Member]    
Schedule of Equity Method Investments [Line Items]    
Income (loss) from equity method investments 829 689
Sovran HHF Storage Holdings II LLC [Member]    
Schedule of Equity Method Investments [Line Items]    
Income (loss) from equity method investments 413 368
191 III Holdings LLC [Member]    
Schedule of Equity Method Investments [Line Items]    
Income (loss) from equity method investments (14) 18
Life Storage-SERS Storage LLC [Member]    
Schedule of Equity Method Investments [Line Items]    
Income (loss) from equity method investments (46) 62
Life Storage-HIERS Storage LLC [Member]    
Schedule of Equity Method Investments [Line Items]    
Income (loss) from equity method investments 20  
Review Avenue Partners LLC [Member]    
Schedule of Equity Method Investments [Line Items]    
Income (loss) from equity method investments (280) (216)
SNL Orix Merrick, LLC [Member]    
Schedule of Equity Method Investments [Line Items]    
Income (loss) from equity method investments (5) (16)
SNL/Orix 1200 McDonald Ave., LLC [Member]    
Schedule of Equity Method Investments [Line Items]    
Income (loss) from equity method investments (13)  
Urban Box Coralway Storage, LLC [Member]    
Schedule of Equity Method Investments [Line Items]    
Income (loss) from equity method investments (125)  
N 32nd Street Self Storage, LLC [Member]    
Schedule of Equity Method Investments [Line Items]    
Income (loss) from equity method investments (21)  
Iskalo Office Holdings, LLC [Member]    
Schedule of Equity Method Investments [Line Items]    
Income (loss) from equity method investments $ 53 $ 67