Summary of Revenues Disaggregated Based on Major Type of Good or Service and by Reportable Operating Segment (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021		Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Total revenues		$ 114,361		$ 543,616
Admissions Revenues
Disaggregation of Revenue [Line Items]
Total revenues		56,121		292,462
Concession Revenues
Disaggregation of Revenue [Line Items]
Total revenues		39,488		190,356
Screen Advertising, Screen Rental and Promotional Revenues
Disaggregation of Revenue [Line Items]
Total revenues		13,368	[1]	30,655
Other Revenues
Disaggregation of Revenue [Line Items]
Total revenues		5,384		30,143
U.S. Operating Segment
Disaggregation of Revenue [Line Items]
Total revenues	[2]	97,089		427,443
U.S. Operating Segment | Admissions Revenues
Disaggregation of Revenue [Line Items]
Total revenues	[2]	48,487		232,326
U.S. Operating Segment | Concession Revenues
Disaggregation of Revenue [Line Items]
Total revenues	[2]	33,041		152,758
U.S. Operating Segment | Screen Advertising, Screen Rental and Promotional Revenues
Disaggregation of Revenue [Line Items]
Total revenues	[2]	11,167	[1]	18,209
U.S. Operating Segment | Other Revenues
Disaggregation of Revenue [Line Items]
Total revenues	[2]	4,394		24,150
International Operating Segment
Disaggregation of Revenue [Line Items]
Total revenues		17,272		116,173
International Operating Segment | Admissions Revenues
Disaggregation of Revenue [Line Items]
Total revenues		7,634		60,136
International Operating Segment | Concession Revenues
Disaggregation of Revenue [Line Items]
Total revenues		6,447		37,598
International Operating Segment | Screen Advertising, Screen Rental and Promotional Revenues
Disaggregation of Revenue [Line Items]
Total revenues		2,201	[1]	12,446
International Operating Segment | Other Revenues
Disaggregation of Revenue [Line Items]
Total revenues		$ 990		$ 5,993

[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.