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Other Noncontrolling Interests - Additional Information (Detail)
Aug. 01, 2016
USD ($)
property
shares
Jun. 11, 2015
USD ($)
property
Sep. 30, 2016
joint_venture
Noncontrolling Interest [Line Items]      
Purchase of capital interest by entity in a joint venture partner of a consolidated property 3.33% 1.00%  
Number of OP units issued for remaining interest in joint venture (in units) | shares 8,889    
Operating Partnership units issued $ 800,000    
Number of operating stores owned by consolidated joint venture | property 1 19  
Carrying amount of noncontrolling interest $ 0 $ 0  
Cash paid for acquiring interest in a joint venture partner of a consolidated property   $ 1,267,000  
Other [Member]      
Noncontrolling Interest [Line Items]      
Number of consolidated joint ventures | joint_venture     1
Other [Member] | Maximum [Member]      
Noncontrolling Interest [Line Items]      
Voting interests of third-party owners     20.00%