Commitments and Contingencies - Additional Information (Detail) $ in Thousands	Jun. 30, 2016 USD ($) store
Commitments And Contingencies [Line Items]
Litigation liability recorded | $	$ 4,000
Contract Amount [Member]
Commitments And Contingencies [Line Items]
Number of stores to be acquired	4
Purchase price | $	$ 190,748
Number of stores scheduled to be closed	7
Contract Amount [Member] | Joint Venture Partners [Member]
Commitments And Contingencies [Line Items]
Number of stores to be acquired	21
Purchase price | $	$ 409,947
Number of stores scheduled to be closed	10
Number of stores expected to be closed	11
Contract Amount [Member] | Construction [Member]
Commitments And Contingencies [Line Items]
Number of stores to be acquired	12