Commitments and Contingencies (Detail) $ in Thousands	Sep. 30, 2021 USD ($) store
Commitment to acquire stores
Other Commitments [Line Items]
Number of real estate properties to be acquired	15
Purchase price | $	$ 221,850
Commitment to acquire stores, scheduled to close in 2021
Other Commitments [Line Items]
Number of real estate properties to be acquired	14
Commitment to acquire stores, scheduled to close in 2022
Other Commitments [Line Items]
Number of real estate properties to be acquired	1
Commitment to acquire stores with joint venture partners
Other Commitments [Line Items]
Number of real estate properties to be acquired	11
Purchase price | $	$ 23,775
Commitment to acquire stores with joint venture partners, scheduled to close in 2021
Other Commitments [Line Items]
Number of real estate properties to be acquired	10
Commitment to acquire stores with joint venture partners, scheduled to close in 2022
Other Commitments [Line Items]
Number of real estate properties to be acquired	1