Annual report pursuant to Section 13 and 15(d)

Summary of Goodwill (Parenthetical) (Detail)

v3.20.4
Summary of Goodwill (Parenthetical) (Detail)
$ in Thousands
Dec. 31, 2020
USD ($)
Theatre
Dec. 31, 2019
USD ($)
Theatre
Goodwill [Line Items]    
Number of theatres acquired | Theatre 2  
U.S. Operating Segment    
Goodwill [Line Items]    
Accumulated impairment losses | $ $ 214,031 $ 214,031
Number of theatres acquired | Theatre   2
International Operating Segment    
Goodwill [Line Items]    
Accumulated impairment losses | $ $ 43,750 $ 27,622