Summary of Activity with NCM Included in Company's Consolidated Financial Statements (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Schedule Of Equity Method Investments [Line Items]
Equity in loss		$ (8,109)	$ (20,120)	$ (14,915)	$ (11,634)
Investment In NCM
Schedule Of Equity Method Investments [Line Items]
Beginning Balance				151,962
Receipt of common units due to annual common unit adjustment ("CUA")				10,237
Receipt under tax receivable agreement				(156)
Equity in loss				(14,414)
Ending Balance		147,629		147,629
N C M Screen Advertising Advances
Schedule Of Equity Method Investments [Line Items]
Beginning Balance				(344,255)
Receipt of common units due to annual common unit adjustment ("CUA")				(10,237)
Interest accrued on NCM screen advertising advances	[1]			(11,797)
Amortization of screen advertising advances				15,927
Ending Balance		(350,362)		(350,362)
Distributions from NCM
Schedule Of Equity Method Investments [Line Items]
Receipt under tax receivable agreement				(77)
Ending Balance		(77)		(77)
Equity in Loss
Schedule Of Equity Method Investments [Line Items]
Equity in loss				14,414
Ending Balance		14,414		14,414
Other Revenues
Schedule Of Equity Method Investments [Line Items]
Screen rental revenues earned under ESA	[2]			(3,790)
Amortization of screen advertising advances				(15,927)
Ending Balance		(19,717)		(19,717)
Interest Expense - NCM
Schedule Of Equity Method Investments [Line Items]
Interest accrued on NCM screen advertising advances				11,797
Ending Balance		11,797		11,797
Cash Received
Schedule Of Equity Method Investments [Line Items]
Screen rental revenues earned under ESA	[2]			3,790
Receipt under tax receivable agreement				233
Ending Balance		$ 4,023		$ 4,023

[1] See Note 9 for the maturity of balance as of June 30, 2021.

[2] Amounts include the per patron and per digital screen theatre access fees due to the Company, net of amounts due to NCM for on-screen advertising time provided to the Company’s beverage concessionaire of approximately $1,399.