Basis of Presentation - Additional Information (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($) Store States	Jan. 01, 2019 USD ($)
Basis Of Presentation [Line Items]
Entity formed, year	1998
Number of Locations | Store	400
Number of states | States	39
Operating lease, right-of-use assets	$ 273,971
Operating lease liabilities	$ 278,577
Accounting Standards Update 2016-02
Basis Of Presentation [Line Items]
Operating lease, right-of-use assets		$ 269,700
Operating lease liabilities		$ 267,500