Leases - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Lessee, Lease, Description [Line Items]
Operating lease, cost	$ 72,789	$ 76,739	$ 218,139	$ 235,473
Variable lease, cost	22,514	13,494	56,507	41,238
Gain (loss) on disposition of assets	26	1,304	1,922	4,823
Operating lease, cash payments			243,690	234,400
Direct advertising expenses (exclusive of depreciation and amortization)	$ 147,310	136,309	$ 418,973	419,862
Operating lease, weighted average remaining lease term	12 years		12 years
Operating lease, weighted average discount rate	4.60%		4.60%
Leased assets obtained in exchange for operating lease liability			$ 25,401	25,250
Amortization expense	$ 713		2,140
Interest expense	$ 145		443
Principal payments on financing leases			$ 998	0
Weighted-average remaining lease term	6 years 2 months 12 days		6 years 2 months 12 days
Weighted-average discount rate	3.50%		3.50%
Advertising
Lessee, Lease, Description [Line Items]
Direct advertising expenses (exclusive of depreciation and amortization)	$ 1,579	1,172	$ 4,471	3,679
Termination of Lease Agreements
Lessee, Lease, Description [Line Items]
Gain (loss) on disposition of assets	$ (349)	$ 76	$ (296)	$ (241)