Quarterly report pursuant to Section 13 or 15(d)

Partners' Capital - Reconciliation of Change in Total Partners' Capital (Detail)

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Partners' Capital - Reconciliation of Change in Total Partners' Capital (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Partners Capital [Line Items]        
Exercise of stock options     $ 2,977  
Earned portion of non-vested stock     4,203  
Stock option expense     7  
Carrying value less than redemption value on redeemed noncontrolling interest     (29)  
Adjustment to redemption value on limited partners’ redeemable capital interests     (1,451)  
Net income attributable to common unitholders $ 41,120 $ 35,496 114,283 $ 75,280
Amortization of terminated hedge included in AOCL     688  
Change in fair value of derivatives     (205)  
Life Storage LP [Member]        
Partners Capital [Line Items]        
Beginning balance of total controlling partners’ capital     2,028,323  
Exercise of stock options     2,977  
Earned portion of non-vested stock     4,203  
Stock option expense     7  
Carrying value less than redemption value on redeemed noncontrolling interest     (29)  
Adjustment to redemption value on limited partners’ redeemable capital interests     (1,451)  
Net income attributable to common unitholders 41,120 $ 35,496 114,283 $ 75,280
Amortization of terminated hedge included in AOCL     688  
Change in fair value of derivatives     (205)  
Distributions     (139,235)  
Ending balance of total controlling partners’ capital $ 2,009,561   $ 2,009,561