Summary of Revenues Disaggregated Based on Major Type of Good or Service and by Reportable Operating Segment (Detail) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2021		Jun. 30, 2020	Jun. 30, 2021		Jun. 30, 2020
Disaggregation of Revenue [Line Items]
Total revenues	$ 294,652		$ 8,974	$ 409,013		$ 552,590
Admissions Revenues
Disaggregation of Revenue [Line Items]
Total revenues	153,479		37	209,600		292,499
Concession Revenues
Disaggregation of Revenue [Line Items]
Total revenues	109,814		124	149,302		190,480
Screen Advertising, Screen Rental and Promotional Revenues
Disaggregation of Revenue [Line Items]
Total revenues	15,904	[1]	8,361	29,272	[1]	39,016
Other Revenues
Disaggregation of Revenue [Line Items]
Total revenues	15,455		452	20,839		30,595
U.S. Operating Segment
Disaggregation of Revenue [Line Items]
Total revenues	269,261		8,155	366,350	[2]	435,598	[2]
U.S. Operating Segment | Admissions Revenues
Disaggregation of Revenue [Line Items]
Total revenues	140,567		37	189,054	[2]	232,363	[2]
U.S. Operating Segment | Concession Revenues
Disaggregation of Revenue [Line Items]
Total revenues	99,357		55	132,398	[2]	152,813	[2]
U.S. Operating Segment | Screen Advertising, Screen Rental and Promotional Revenues
Disaggregation of Revenue [Line Items]
Total revenues	15,322	[1]	7,883	26,489	[1],[2]	26,092	[2]
U.S. Operating Segment | Other Revenues
Disaggregation of Revenue [Line Items]
Total revenues	14,015		180	18,409	[2]	24,330	[2]
International Operating Segment
Disaggregation of Revenue [Line Items]
Total revenues	25,391		819	42,663		116,992
International Operating Segment | Admissions Revenues
Disaggregation of Revenue [Line Items]
Total revenues	12,912			20,546		60,136
International Operating Segment | Concession Revenues
Disaggregation of Revenue [Line Items]
Total revenues	10,457		69	16,904		37,667
International Operating Segment | Screen Advertising, Screen Rental and Promotional Revenues
Disaggregation of Revenue [Line Items]
Total revenues	582	[1]	478	2,783	[1]	12,924
International Operating Segment | Other Revenues
Disaggregation of Revenue [Line Items]
Total revenues	$ 1,440		$ 272	$ 2,430		$ 6,265

[1] Amount includes amortization of NCM screen advertising advances.  See Deferred Revenues below.

[2] U.S. segment revenues include eliminations of intercompany transactions with the international operating segment.  See Note 17 for additional information on intercompany eliminations.