Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Share and Earnings Per Unit - Computation of Basic and Diluted Earnings Per Common Share/Unit (Detail)

v3.10.0.1
Earnings Per Share and Earnings Per Unit - Computation of Basic and Diluted Earnings Per Common Share/Unit (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Numerator:        
Net income attributable to common shareholders/unitholders $ 41,120 $ 35,496 $ 114,283 $ 75,280
Denominator:        
Denominator for basic earnings per share/unit – weighted average shares/units 46,526,362 46,415,782 46,486,587 46,361,747
Effect of Dilutive Securities:        
Stock options and non-vested stock 102,000 104,000 93,000 110,000
Denominator for diluted earnings per share/unit - adjusted weighted average shares/units and assumed conversion 46,627,968 46,520,311 46,580,331 46,472,294
Basic earnings per common share/unit attributable to common shareholders/unitholders $ 0.88 $ 0.76 $ 2.46 $ 1.62
Diluted earnings per common share/unit attributable to common shareholders/unitholders $ 0.88 $ 0.76 $ 2.45 $ 1.62
Life Storage LP [Member]        
Numerator:        
Net income attributable to common shareholders/unitholders $ 41,120 $ 35,496 $ 114,283 $ 75,280
Denominator:        
Denominator for basic earnings per share/unit – weighted average shares/units 46,526,362 46,415,782 46,486,587 46,361,747
Effect of Dilutive Securities:        
Stock options and non-vested stock 102,000 104,000 93,000 110,000
Denominator for diluted earnings per share/unit - adjusted weighted average shares/units and assumed conversion 46,627,968 46,520,311 46,580,331 46,472,294
Basic earnings per common share/unit attributable to common shareholders/unitholders $ 0.88 $ 0.76 $ 2.46 $ 1.62
Diluted earnings per common share/unit attributable to common shareholders/unitholders $ 0.88 $ 0.76 $ 2.45 $ 1.62