Quarterly report pursuant to Section 13 or 15(d)

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

v3.10.0.1
Investment in Joint Ventures - Company's Share of Unconsolidated Joint Ventures' Income (Loss) (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Schedule of Equity Method Investments [Line Items]        
Income (loss) from equity method investments $ 1,046 $ 752 $ 3,066 $ 2,259
Sovran HHF Storage Holdings LLC [Member]        
Schedule of Equity Method Investments [Line Items]        
Income (loss) from equity method investments 828 588 2,257 1,750
Sovran HHF Storage Holdings II LLC [Member]        
Schedule of Equity Method Investments [Line Items]        
Income (loss) from equity method investments 436 398 1,235 1,100
191 III Holdings LLC [Member]        
Schedule of Equity Method Investments [Line Items]        
Income (loss) from equity method investments 7 (14) 43 12
Life Storage-SERS Storage LLC [Member]        
Schedule of Equity Method Investments [Line Items]        
Income (loss) from equity method investments 20 (43) 107 (43)
Review Avenue Partners LLC [Member]        
Schedule of Equity Method Investments [Line Items]        
Income (loss) from equity method investments (215) (248) (648) (749)
SNL Orix Merrick, LLC [Member]        
Schedule of Equity Method Investments [Line Items]        
Income (loss) from equity method investments (6)   (38)  
SNL/Orix 1200 McDonald Ave., LLC [Member]        
Schedule of Equity Method Investments [Line Items]        
Income (loss) from equity method investments (10)   (10)  
Urban Box Coralway Storage, LLC [Member]        
Schedule of Equity Method Investments [Line Items]        
Income (loss) from equity method investments (19)   (19)  
N 32nd Street Self Storage, LLC [Member]        
Schedule of Equity Method Investments [Line Items]        
Income (loss) from equity method investments (48)   (48)  
Iskalo Office Holdings, LLC [Member]        
Schedule of Equity Method Investments [Line Items]        
Income (loss) from equity method investments $ 53 $ 71 $ 187 $ 189