Annual report pursuant to Section 13 and 15(d)

Summary of Impact of Adoption of ASC 606 on Balance Sheet (Parenthetical) (Detail)

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Summary of Impact of Adoption of ASC 606 on Balance Sheet (Parenthetical) (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Jan. 02, 2018
Jan. 01, 2018
Revenue Recognition [Line Items]      
Cumulative effect of accounting change adjustment net of taxes, in retained earnings   $ 40,526  
NCM | Adoption of ASC Topic 606      
Revenue Recognition [Line Items]      
Cumulative effect of accounting change adjustment net of taxes, in retained earnings     $ 53,605
Impact of change in amortization method $ 4,104