Commitments and Contingencies - Additional Information (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) store
Commitment To Acquire Retail Space [Member]
Commitments And Contingencies [Line Items]
Number of real estate properties to be acquired	26
Purchase price | $	$ 355,836
Commitment To Acquire Retail Space, Closing In 2017 [Member]
Commitments And Contingencies [Line Items]
Purchase price | $	$ 306,908
Number of stores scheduled to be closed	22
Commitment To Acquire Retail Space, Closing In 2018 [Member]
Commitments And Contingencies [Line Items]
Purchase price | $	$ 10,528
Number of stores scheduled to be closed	1
Commitment To Acquire Retail Space, Closing After 2018 [Member]
Commitments And Contingencies [Line Items]
Purchase price | $	$ 38,400
Number of stores scheduled to be closed	3
Commitment To Acquire Retail Space With Joint Venture Partners [Member]
Commitments And Contingencies [Line Items]
Number of real estate properties to be acquired	15
Purchase price | $	$ 77,818
Commitment To Acquire Retail Space With Joint Venture Partners, Expected To Close Next Fiscal Year [Member]
Commitments And Contingencies [Line Items]
Number of stores scheduled to be closed	12
Commitment To Acquire Retail Space With Joint Venture Partners, Closing in 2018 [Member]
Commitments And Contingencies [Line Items]
Number of stores scheduled to be closed	3