Summary of Goodwill (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2018 USD ($)
Goodwill [Line Items]
Beginning Balance	$ 1,284,079	[1]
Acquisition of theatres in Brazil	11,508	[2]
Foreign currency translation adjustments	(14,417)
Ending Balance	1,281,170	[1]
U.S. Operating Segment
Goodwill [Line Items]
Beginning Balance	1,174,041	[1]
Ending Balance	1,174,041	[1]
International Operating Segment
Goodwill [Line Items]
Beginning Balance	110,038	[1]
Acquisition of theatres in Brazil	11,508	[2]
Foreign currency translation adjustments	(14,417)
Ending Balance	$ 107,129	[1]

[1] Balances are presented net of accumulated impairment losses of $214,031 for the U.S. operating segment and $27,622 for the international operating segment.

[2] Amount represents preliminary purchase price allocation for theatres acquired in Brazil.