Other Noncontrolling Interests - Additional Information (Detail)	Jun. 30, 2018 property joint_venture Development_store
Other [Member]
Noncontrolling Interest [Line Items]
Number of consolidated joint ventures | joint_venture	2
Number of development stores owned | Development_store	2
Minimum | Other [Member]
Noncontrolling Interest [Line Items]
Voting interests of third-party owners	5.00%
Maximum | Other [Member]
Noncontrolling Interest [Line Items]
Voting interests of third-party owners	20.00%
Joint Venture 1
Noncontrolling Interest [Line Items]
Number of operating stores owned	2
Joint Venture 1 | Texas
Noncontrolling Interest [Line Items]
Number of operating stores owned	2
Joint Venture 1 | Colorado
Noncontrolling Interest [Line Items]
Number of operating stores owned	1
Joint Venture 2 | Pennsylvania
Noncontrolling Interest [Line Items]
Number of development stores owned	1
Joint Venture 2 | New Jersey
Noncontrolling Interest [Line Items]
Number of development stores owned	1