Summary Financial Information for DCIP (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule Of Equity Method Investments [Line Items]
Total revenues	$ 1,510,464	$ 686,310	$ 3,283,099
Net income (loss)	(422,215)	(617,948)	193,848
Current assets	874,472	892,747
Current liabilities	769,144	606,441
Noncurrent liabilities	4,127,038	4,157,512
Members' equity (deficit)	334,468	798,969	1,448,322	$ 1,408,570
Other Affiliates | Digital Cinema Implementation Partners
Schedule Of Equity Method Investments [Line Items]
Total revenues	54,383	30,561	171,531
Operating income (loss)	43,062	(105,691)	99,812
Net income (loss)	45,323	(114,243)	$ 95,820
Current assets	22,947	36,372
Noncurrent assets	0	205
Current liabilities	11,631	39,844
Noncurrent liabilities	0	687
Members' equity (deficit)	$ 11,316	$ (3,954)