Summary of Revenues Disaggregated Based on Major Type of Good or Service and by Reportable Operating Segment (Detail) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
		Sep. 30, 2020		Sep. 30, 2019	Sep. 30, 2020		Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Total revenues		$ 35,478		$ 821,817	$ 588,068		$ 2,494,296
Admissions Revenues
Disaggregation of Revenue [Line Items]
Total revenues		14,901		454,429	307,400		1,371,041
Concession Revenues
Disaggregation of Revenue [Line Items]
Total revenues		9,116		289,477	199,596		886,083
Screen Advertising, Screen Rental and Promotional Revenues
Disaggregation of Revenue [Line Items]
Total revenues		9,740	[1]	37,562	48,756	[1]	113,583
Other Revenues
Disaggregation of Revenue [Line Items]
Total revenues		1,721		40,349	32,316		123,589
U.S. Operating Segment
Disaggregation of Revenue [Line Items]
Total revenues	[2]	34,409		633,045	470,007		1,930,787
U.S. Operating Segment | Admissions Revenues
Disaggregation of Revenue [Line Items]
Total revenues	[2]	14,794		351,122	247,157		1,066,884
U.S. Operating Segment | Concession Revenues
Disaggregation of Revenue [Line Items]
Total revenues	[2]	8,861		230,415	161,674		704,727
U.S. Operating Segment | Screen Advertising, Screen Rental and Promotional Revenues
Disaggregation of Revenue [Line Items]
Total revenues	[2]	9,227	[1]	21,114	35,319	[1]	63,996
U.S. Operating Segment | Other Revenues
Disaggregation of Revenue [Line Items]
Total revenues	[2]	1,527		30,394	25,857		95,180
International Operating Segment
Disaggregation of Revenue [Line Items]
Total revenues		1,069		188,772	118,061		563,509
International Operating Segment | Admissions Revenues
Disaggregation of Revenue [Line Items]
Total revenues		107		103,307	60,243		304,157
International Operating Segment | Concession Revenues
Disaggregation of Revenue [Line Items]
Total revenues		255		59,062	37,922		181,356
International Operating Segment | Screen Advertising, Screen Rental and Promotional Revenues
Disaggregation of Revenue [Line Items]
Total revenues		513	[1]	16,448	13,437	[1]	49,587
International Operating Segment | Other Revenues
Disaggregation of Revenue [Line Items]
Total revenues		$ 194		$ 9,955	$ 6,459		$ 28,409

[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.